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flynn/flynn
controller/client/v1/client.go
ArtifactList
func (c *Client) ArtifactList() ([]*ct.Artifact, error) { var artifacts []*ct.Artifact return artifacts, c.Get("/artifacts", &artifacts) }
go
func (c *Client) ArtifactList() ([]*ct.Artifact, error) { var artifacts []*ct.Artifact return artifacts, c.Get("/artifacts", &artifacts) }
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// ArtifactList returns a list of all artifacts
[ "ArtifactList", "returns", "a", "list", "of", "all", "artifacts" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L760-L763
train
flynn/flynn
controller/client/v1/client.go
ReleaseList
func (c *Client) ReleaseList() ([]*ct.Release, error) { var releases []*ct.Release return releases, c.Get("/releases", &releases) }
go
func (c *Client) ReleaseList() ([]*ct.Release, error) { var releases []*ct.Release return releases, c.Get("/releases", &releases) }
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// ReleaseList returns a list of all releases
[ "ReleaseList", "returns", "a", "list", "of", "all", "releases" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L766-L769
train
flynn/flynn
controller/client/v1/client.go
AppReleaseList
func (c *Client) AppReleaseList(appID string) ([]*ct.Release, error) { var releases []*ct.Release return releases, c.Get(fmt.Sprintf("/apps/%s/releases", appID), &releases) }
go
func (c *Client) AppReleaseList(appID string) ([]*ct.Release, error) { var releases []*ct.Release return releases, c.Get(fmt.Sprintf("/apps/%s/releases", appID), &releases) }
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// AppReleaseList returns a list of all releases under appID.
[ "AppReleaseList", "returns", "a", "list", "of", "all", "releases", "under", "appID", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L772-L775
train
flynn/flynn
controller/client/v1/client.go
ProviderList
func (c *Client) ProviderList() ([]*ct.Provider, error) { var providers []*ct.Provider return providers, c.Get("/providers", &providers) }
go
func (c *Client) ProviderList() ([]*ct.Provider, error) { var providers []*ct.Provider return providers, c.Get("/providers", &providers) }
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// ProviderList returns a list of all providers.
[ "ProviderList", "returns", "a", "list", "of", "all", "providers", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L778-L781
train
flynn/flynn
controller/client/v1/client.go
GetVolume
func (c *Client) GetVolume(appID, id string) (*ct.Volume, error) { if appID == "" { return nil, errors.New("controller: missing app ID") } if id == "" { return nil, errors.New("controller: missing id") } vol := &ct.Volume{} return vol, c.Get(fmt.Sprintf("/apps/%s/volumes/%s", appID, id), vol) }
go
func (c *Client) GetVolume(appID, id string) (*ct.Volume, error) { if appID == "" { return nil, errors.New("controller: missing app ID") } if id == "" { return nil, errors.New("controller: missing id") } vol := &ct.Volume{} return vol, c.Get(fmt.Sprintf("/apps/%s/volumes/%s", appID, id), vol) }
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// GetVolume returns a Volume for the given volume ID
[ "GetVolume", "returns", "a", "Volume", "for", "the", "given", "volume", "ID" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L784-L793
train
flynn/flynn
controller/client/v1/client.go
PutVolume
func (c *Client) PutVolume(vol *ct.Volume) error { if vol.ID == "" { return errors.New("controller: missing id") } return c.Put(fmt.Sprintf("/volumes/%s", vol.ID), vol, vol) }
go
func (c *Client) PutVolume(vol *ct.Volume) error { if vol.ID == "" { return errors.New("controller: missing id") } return c.Put(fmt.Sprintf("/volumes/%s", vol.ID), vol, vol) }
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// PutVolume updates an existing volume.
[ "PutVolume", "updates", "an", "existing", "volume", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L796-L801
train
flynn/flynn
controller/client/v1/client.go
VolumeList
func (c *Client) VolumeList() ([]*ct.Volume, error) { var volumes []*ct.Volume return volumes, c.Get("/volumes", &volumes) }
go
func (c *Client) VolumeList() ([]*ct.Volume, error) { var volumes []*ct.Volume return volumes, c.Get("/volumes", &volumes) }
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// VolumeList returns a list of all volumes.
[ "VolumeList", "returns", "a", "list", "of", "all", "volumes", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L804-L807
train
flynn/flynn
controller/client/v1/client.go
AppVolumeList
func (c *Client) AppVolumeList(appID string) ([]*ct.Volume, error) { if appID == "" { return nil, errors.New("controller: missing app ID") } var volumes []*ct.Volume return volumes, c.Get(fmt.Sprintf("/apps/%s/volumes", appID), &volumes) }
go
func (c *Client) AppVolumeList(appID string) ([]*ct.Volume, error) { if appID == "" { return nil, errors.New("controller: missing app ID") } var volumes []*ct.Volume return volumes, c.Get(fmt.Sprintf("/apps/%s/volumes", appID), &volumes) }
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// AppVolumeList returns a list of all volumes for an app.
[ "AppVolumeList", "returns", "a", "list", "of", "all", "volumes", "for", "an", "app", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L810-L816
train
flynn/flynn
controller/client/v1/client.go
DecommissionVolume
func (c *Client) DecommissionVolume(appID string, vol *ct.Volume) error { if appID == "" { return errors.New("controller: missing app ID") } if vol.ID == "" { return errors.New("controller: missing id") } return c.Put(fmt.Sprintf("/apps/%s/volumes/%s/decommission", appID, vol.ID), &vol, &vol) }
go
func (c *Client) DecommissionVolume(appID string, vol *ct.Volume) error { if appID == "" { return errors.New("controller: missing app ID") } if vol.ID == "" { return errors.New("controller: missing id") } return c.Put(fmt.Sprintf("/apps/%s/volumes/%s/decommission", appID, vol.ID), &vol, &vol) }
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// DecommissionVolume decommissions a volume
[ "DecommissionVolume", "decommissions", "a", "volume" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L819-L827
train
flynn/flynn
controller/client/v1/client.go
StreamVolumes
func (c *Client) StreamVolumes(since *time.Time, output chan *ct.Volume) (stream.Stream, error) { if since == nil { s := time.Unix(0, 0) since = &s } t := since.UTC().Format(time.RFC3339Nano) return c.Stream("GET", "/volumes?since="+t, nil, output) }
go
func (c *Client) StreamVolumes(since *time.Time, output chan *ct.Volume) (stream.Stream, error) { if since == nil { s := time.Unix(0, 0) since = &s } t := since.UTC().Format(time.RFC3339Nano) return c.Stream("GET", "/volumes?since="+t, nil, output) }
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// StreamVolumes sends a series of Volume into the provided channel. // If since is not nil, only retrieves volume updates since the specified time.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L831-L838
train
flynn/flynn
controller/client/v1/client.go
Backup
func (c *Client) Backup() (io.ReadCloser, error) { res, err := c.RawReq("GET", "/backup", nil, nil, nil) if err != nil { return nil, err } return res.Body, nil }
go
func (c *Client) Backup() (io.ReadCloser, error) { res, err := c.RawReq("GET", "/backup", nil, nil, nil) if err != nil { return nil, err } return res.Body, nil }
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// Backup takes a backup of the cluster
[ "Backup", "takes", "a", "backup", "of", "the", "cluster" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L841-L847
train
flynn/flynn
controller/client/v1/client.go
GetBackupMeta
func (c *Client) GetBackupMeta() (*ct.ClusterBackup, error) { b := &ct.ClusterBackup{} return b, c.Get("/backup", b) }
go
func (c *Client) GetBackupMeta() (*ct.ClusterBackup, error) { b := &ct.ClusterBackup{} return b, c.Get("/backup", b) }
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// GetBackupMeta returns metadata for latest backup
[ "GetBackupMeta", "returns", "metadata", "for", "latest", "backup" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L850-L853
train
flynn/flynn
controller/client/v1/client.go
DeleteRelease
func (c *Client) DeleteRelease(appID, releaseID string) (*ct.ReleaseDeletion, error) { events := make(chan *ct.Event) stream, err := c.StreamEvents(ct.StreamEventsOptions{ AppID: appID, ObjectID: releaseID, ObjectTypes: []ct.EventType{ct.EventTypeReleaseDeletion}, }, events) if err != nil { return nil, err } defer stream.Close() if err := c.Delete(fmt.Sprintf("/apps/%s/releases/%s", appID, releaseID), nil); err != nil { return nil, err } select { case event, ok := <-events: if !ok { return nil, stream.Err() } var e ct.ReleaseDeletionEvent if err := json.Unmarshal(event.Data, &e); err != nil { return nil, err } if e.Error != "" { return nil, errors.New(e.Error) } return e.ReleaseDeletion, nil case <-time.After(60 * time.Second): return nil, errors.New("timed out waiting for release deletion") } }
go
func (c *Client) DeleteRelease(appID, releaseID string) (*ct.ReleaseDeletion, error) { events := make(chan *ct.Event) stream, err := c.StreamEvents(ct.StreamEventsOptions{ AppID: appID, ObjectID: releaseID, ObjectTypes: []ct.EventType{ct.EventTypeReleaseDeletion}, }, events) if err != nil { return nil, err } defer stream.Close() if err := c.Delete(fmt.Sprintf("/apps/%s/releases/%s", appID, releaseID), nil); err != nil { return nil, err } select { case event, ok := <-events: if !ok { return nil, stream.Err() } var e ct.ReleaseDeletionEvent if err := json.Unmarshal(event.Data, &e); err != nil { return nil, err } if e.Error != "" { return nil, errors.New(e.Error) } return e.ReleaseDeletion, nil case <-time.After(60 * time.Second): return nil, errors.New("timed out waiting for release deletion") } }
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// DeleteRelease deletes a release and any associated file artifacts.
[ "DeleteRelease", "deletes", "a", "release", "and", "any", "associated", "file", "artifacts", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L856-L888
train
flynn/flynn
controller/client/v1/client.go
ScheduleAppGarbageCollection
func (c *Client) ScheduleAppGarbageCollection(appID string) error { return c.Post(fmt.Sprintf("/apps/%s/gc", appID), nil, nil) }
go
func (c *Client) ScheduleAppGarbageCollection(appID string) error { return c.Post(fmt.Sprintf("/apps/%s/gc", appID), nil, nil) }
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// ScheduleAppGarbageCollection schedules a garbage collection cycle for the app
[ "ScheduleAppGarbageCollection", "schedules", "a", "garbage", "collection", "cycle", "for", "the", "app" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L891-L893
train
flynn/flynn
controller/client/v1/client.go
Status
func (c *Client) Status() (*status.Status, error) { type statusResponse struct { Data status.Status `json:"data"` } s := &statusResponse{} if err := c.Get(status.Path, s); err != nil { return nil, err } return &s.Data, nil }
go
func (c *Client) Status() (*status.Status, error) { type statusResponse struct { Data status.Status `json:"data"` } s := &statusResponse{} if err := c.Get(status.Path, s); err != nil { return nil, err } return &s.Data, nil }
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// Status gets the controller status
[ "Status", "gets", "the", "controller", "status" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L896-L905
train
flynn/flynn
controller/client/v1/client.go
CreateSink
func (c *Client) CreateSink(sink *ct.Sink) error { return c.Post("/sinks", sink, sink) }
go
func (c *Client) CreateSink(sink *ct.Sink) error { return c.Post("/sinks", sink, sink) }
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// CreateSink creates a new log sink
[ "CreateSink", "creates", "a", "new", "log", "sink" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L908-L910
train
flynn/flynn
controller/client/v1/client.go
GetSink
func (c *Client) GetSink(sinkID string) (*ct.Sink, error) { sink := &ct.Sink{} return sink, c.Get(fmt.Sprintf("/sinks/%s", sinkID), sink) }
go
func (c *Client) GetSink(sinkID string) (*ct.Sink, error) { sink := &ct.Sink{} return sink, c.Get(fmt.Sprintf("/sinks/%s", sinkID), sink) }
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// GetSink gets a log sink
[ "GetSink", "gets", "a", "log", "sink" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L913-L916
train
flynn/flynn
controller/client/v1/client.go
DeleteSink
func (c *Client) DeleteSink(sinkID string) (*ct.Sink, error) { sink := &ct.Sink{} return sink, c.Delete(fmt.Sprintf("/sinks/%s", sinkID), sink) }
go
func (c *Client) DeleteSink(sinkID string) (*ct.Sink, error) { sink := &ct.Sink{} return sink, c.Delete(fmt.Sprintf("/sinks/%s", sinkID), sink) }
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// DeleteSink removes a log sink
[ "DeleteSink", "removes", "a", "log", "sink" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L919-L922
train
flynn/flynn
controller/client/v1/client.go
ListSinks
func (c *Client) ListSinks() ([]*ct.Sink, error) { var sinks []*ct.Sink return sinks, c.Get("/sinks", &sinks) }
go
func (c *Client) ListSinks() ([]*ct.Sink, error) { var sinks []*ct.Sink return sinks, c.Get("/sinks", &sinks) }
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// ListSink returns all log sinks
[ "ListSink", "returns", "all", "log", "sinks" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/client/v1/client.go#L925-L928
train
flynn/flynn
discoverd/client/watch.go
addInst
func (w *Watch) addInst(inst *Instance) (known, identical bool) { var i *Instance i, known = w.instances[inst.ID] identical = known && i.Equal(inst) w.instances[inst.ID] = inst return }
go
func (w *Watch) addInst(inst *Instance) (known, identical bool) { var i *Instance i, known = w.instances[inst.ID] identical = known && i.Equal(inst) w.instances[inst.ID] = inst return }
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// addInst adds the given instance to the local state and returns whether the // instance already existed in the local state, and if it did exist, whether it // was identical.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/client/watch.go#L64-L70
train
flynn/flynn
discoverd/client/watch.go
delInst
func (w *Watch) delInst(inst *Instance) { delete(w.instances, inst.ID) }
go
func (w *Watch) delInst(inst *Instance) { delete(w.instances, inst.ID) }
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// delInst removes the given instance from the local state.
[ "delInst", "removes", "the", "given", "instance", "from", "the", "local", "state", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/client/watch.go#L73-L75
train
flynn/flynn
controller/scheduler/scheduler.go
maybeStartBlockedJobs
func (s *Scheduler) maybeStartBlockedJobs(host *Host) { for _, job := range s.jobs { if job.State == JobStateBlocked && job.TagsMatchHost(host) { job.State = JobStatePending go s.StartJob(job) } } }
go
func (s *Scheduler) maybeStartBlockedJobs(host *Host) { for _, job := range s.jobs { if job.State == JobStateBlocked && job.TagsMatchHost(host) { job.State = JobStatePending go s.StartJob(job) } } }
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// maybeStartBlockedJobs starts any jobs which are blocked due to not // matching tags of any hosts on the given host, which is expected to be // either a new host or a host whose tags have just changed
[ "maybeStartBlockedJobs", "starts", "any", "jobs", "which", "are", "blocked", "due", "to", "not", "matching", "tags", "of", "any", "hosts", "on", "the", "given", "host", "which", "is", "expected", "to", "be", "either", "a", "new", "host", "or", "a", "host", "whose", "tags", "have", "just", "changed" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/scheduler/scheduler.go#L1003-L1010
train
flynn/flynn
controller/scheduler/scheduler.go
findVolume
func (s *Scheduler) findVolume(job *Job, req *ct.VolumeReq) *Volume { for _, vol := range s.volumes { // skip destroyed or decommissioned volumes if vol.GetState() == ct.VolumeStateDestroyed || vol.DecommissionedAt != nil { continue } // skip if the app, release, type or path do not match if vol.AppID != job.AppID { continue } if vol.ReleaseID != job.ReleaseID { continue } if vol.JobType != job.Type { continue } if vol.Path != req.Path { continue } // skip if the volume is assigned to another job if vol.JobID != nil && *vol.JobID != job.ID { continue } // skip if we have already assigned the job to a host // and this volume doesn't exist on that host if job.HostID != "" && vol.HostID != job.HostID { continue } // return the matching volume return vol } return nil }
go
func (s *Scheduler) findVolume(job *Job, req *ct.VolumeReq) *Volume { for _, vol := range s.volumes { // skip destroyed or decommissioned volumes if vol.GetState() == ct.VolumeStateDestroyed || vol.DecommissionedAt != nil { continue } // skip if the app, release, type or path do not match if vol.AppID != job.AppID { continue } if vol.ReleaseID != job.ReleaseID { continue } if vol.JobType != job.Type { continue } if vol.Path != req.Path { continue } // skip if the volume is assigned to another job if vol.JobID != nil && *vol.JobID != job.ID { continue } // skip if we have already assigned the job to a host // and this volume doesn't exist on that host if job.HostID != "" && vol.HostID != job.HostID { continue } // return the matching volume return vol } return nil }
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// findVolume looks for an existing, unassigned volume which matches the given // job's app, release and type, and the volume request's path
[ "findVolume", "looks", "for", "an", "existing", "unassigned", "volume", "which", "matches", "the", "given", "job", "s", "app", "release", "and", "type", "and", "the", "volume", "request", "s", "path" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/scheduler/scheduler.go#L1040-L1076
train
flynn/flynn
controller/scheduler/scheduler.go
activeFormationCount
func (s *Scheduler) activeFormationCount(appID string) int { activeReleases := make(map[string]struct{}) for _, job := range s.jobs { if job.IsRunning() && job.IsInApp(appID) { activeReleases[job.Formation.Release.ID] = struct{}{} } } return len(activeReleases) }
go
func (s *Scheduler) activeFormationCount(appID string) int { activeReleases := make(map[string]struct{}) for _, job := range s.jobs { if job.IsRunning() && job.IsInApp(appID) { activeReleases[job.Formation.Release.ID] = struct{}{} } } return len(activeReleases) }
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// activeFormationCount returns the number of formations which have running // jobs for the given app
[ "activeFormationCount", "returns", "the", "number", "of", "formations", "which", "have", "running", "jobs", "for", "the", "given", "app" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/scheduler/scheduler.go#L1537-L1545
train
flynn/flynn
controller/scheduler/scheduler.go
findJobToStop
func (s *Scheduler) findJobToStop(f *Formation, typ string) (*Job, error) { var found *Job for _, job := range s.jobs.WithFormationAndType(f, typ) { switch job.State { case JobStatePending: return job, nil case JobStateStarting, JobStateRunning: // if the job is on a host which is shutting down, // return it (it is about to stop anyway, and this // avoids a race where modifying the omni counts to // remove a shut down host could cause a subsequent // rectify to stop a job on an active host before the // shutting down host's job has stopped) if host, ok := s.hosts[job.HostID]; ok && host.Shutdown { return job, nil } // return the most recent job (which is the first in // the slice we are iterating over) if none of the // above cases match, preferring starting jobs to // running ones if found == nil || found.State == JobStateRunning && job.State == JobStateStarting { found = job } } } if found == nil { return nil, fmt.Errorf("no %s jobs running", typ) } return found, nil }
go
func (s *Scheduler) findJobToStop(f *Formation, typ string) (*Job, error) { var found *Job for _, job := range s.jobs.WithFormationAndType(f, typ) { switch job.State { case JobStatePending: return job, nil case JobStateStarting, JobStateRunning: // if the job is on a host which is shutting down, // return it (it is about to stop anyway, and this // avoids a race where modifying the omni counts to // remove a shut down host could cause a subsequent // rectify to stop a job on an active host before the // shutting down host's job has stopped) if host, ok := s.hosts[job.HostID]; ok && host.Shutdown { return job, nil } // return the most recent job (which is the first in // the slice we are iterating over) if none of the // above cases match, preferring starting jobs to // running ones if found == nil || found.State == JobStateRunning && job.State == JobStateStarting { found = job } } } if found == nil { return nil, fmt.Errorf("no %s jobs running", typ) } return found, nil }
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// findJobToStop finds a job from the given formation and type which should be // stopped, choosing pending jobs if present, and the most recently started job // otherwise
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/controller/scheduler/scheduler.go#L2478-L2508
train
flynn/flynn
appliance/redis/cmd/flynn-redis/main.go
readID
func (m *Main) readID(path string) (string, error) { buf, err := ioutil.ReadFile(path) if err != nil && !os.IsNotExist(err) { return "", fmt.Errorf("error reading instance ID: %s", err) } // If the ID exists then return it immediately. id := string(buf) if id != "" { return id, nil } // Generate a new ID and write it to file. id = random.UUID() if err := ioutil.WriteFile(path, []byte(id), 0644); err != nil { return "", fmt.Errorf("error writing instance ID: %s", err) } return id, nil }
go
func (m *Main) readID(path string) (string, error) { buf, err := ioutil.ReadFile(path) if err != nil && !os.IsNotExist(err) { return "", fmt.Errorf("error reading instance ID: %s", err) } // If the ID exists then return it immediately. id := string(buf) if id != "" { return id, nil } // Generate a new ID and write it to file. id = random.UUID() if err := ioutil.WriteFile(path, []byte(id), 0644); err != nil { return "", fmt.Errorf("error writing instance ID: %s", err) } return id, nil }
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// readID reads the instance id from path. // If the file instance id doesn't exist then a random ID is generated.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/appliance/redis/cmd/flynn-redis/main.go#L195-L213
train
flynn/flynn
host/fixer/fixer.go
FindAppReleaseJobs
func (f *ClusterFixer) FindAppReleaseJobs(app, typ string) []map[string]*host.Job { var sortReleases ReleasesByCreate releases := make(map[string]map[string]*host.ActiveJob) // map of releaseID -> hostID -> job ordered // connect to each host, list jobs, find distinct releases for _, h := range f.hosts { jobs, err := h.ListJobs() if err != nil { f.l.Error("error listing jobs", "host", h.ID(), "error", err) continue } for _, j := range jobs { if j.Job.Metadata["flynn-controller.app_name"] != app || j.Job.Metadata["flynn-controller.type"] != typ { continue } id := j.Job.Metadata["flynn-controller.release"] if id == "" { continue } m, ok := releases[id] if !ok { sortReleases = append(sortReleases, SortableRelease{id, j.StartedAt}) m = make(map[string]*host.ActiveJob) releases[id] = m } if curr, ok := m[h.ID()]; ok && curr.StartedAt.Before(j.StartedAt) { continue } jobCopy := j m[h.ID()] = &jobCopy } } sort.Sort(sortReleases) res := make([]map[string]*host.Job, len(sortReleases)) for i, r := range sortReleases { res[i] = make(map[string]*host.Job, len(releases[r.id])) for k, v := range releases[r.id] { res[i][k] = v.Job } } return res }
go
func (f *ClusterFixer) FindAppReleaseJobs(app, typ string) []map[string]*host.Job { var sortReleases ReleasesByCreate releases := make(map[string]map[string]*host.ActiveJob) // map of releaseID -> hostID -> job ordered // connect to each host, list jobs, find distinct releases for _, h := range f.hosts { jobs, err := h.ListJobs() if err != nil { f.l.Error("error listing jobs", "host", h.ID(), "error", err) continue } for _, j := range jobs { if j.Job.Metadata["flynn-controller.app_name"] != app || j.Job.Metadata["flynn-controller.type"] != typ { continue } id := j.Job.Metadata["flynn-controller.release"] if id == "" { continue } m, ok := releases[id] if !ok { sortReleases = append(sortReleases, SortableRelease{id, j.StartedAt}) m = make(map[string]*host.ActiveJob) releases[id] = m } if curr, ok := m[h.ID()]; ok && curr.StartedAt.Before(j.StartedAt) { continue } jobCopy := j m[h.ID()] = &jobCopy } } sort.Sort(sortReleases) res := make([]map[string]*host.Job, len(sortReleases)) for i, r := range sortReleases { res[i] = make(map[string]*host.Job, len(releases[r.id])) for k, v := range releases[r.id] { res[i][k] = v.Job } } return res }
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// FindAppReleaseJobs returns a slice with one map of host id to job for each // known release of the given app and type, most recent first
[ "FindAppReleaseJobs", "returns", "a", "slice", "with", "one", "map", "of", "host", "id", "to", "job", "for", "each", "known", "release", "of", "the", "given", "app", "and", "type", "most", "recent", "first" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/host/fixer/fixer.go#L220-L260
train
flynn/flynn
pkg/cors/cors.go
IsOriginAllowed
func (o *Options) IsOriginAllowed(origin string, req *http.Request) (allowed bool) { if o.ShouldAllowOrigin != nil { return o.ShouldAllowOrigin(origin, req) } for _, pattern := range allowOriginPatterns { allowed, _ = regexp.MatchString(pattern, origin) if allowed { return } } return }
go
func (o *Options) IsOriginAllowed(origin string, req *http.Request) (allowed bool) { if o.ShouldAllowOrigin != nil { return o.ShouldAllowOrigin(origin, req) } for _, pattern := range allowOriginPatterns { allowed, _ = regexp.MatchString(pattern, origin) if allowed { return } } return }
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// Looks up if the origin matches one of the patterns // generated from Options.AllowOrigins patterns.
[ "Looks", "up", "if", "the", "origin", "matches", "one", "of", "the", "patterns", "generated", "from", "Options", ".", "AllowOrigins", "patterns", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cors/cors.go#L106-L117
train
flynn/flynn
pkg/cors/cors.go
Handler
func (o *Options) Handler(next http.Handler) http.HandlerFunc { // Allow default headers if nothing is specified. if len(o.AllowHeaders) == 0 { o.AllowHeaders = defaultAllowHeaders } for _, origin := range o.AllowOrigins { pattern := regexp.QuoteMeta(origin) pattern = strings.Replace(pattern, "\\*", ".*", -1) pattern = strings.Replace(pattern, "\\?", ".", -1) allowOriginPatterns = append(allowOriginPatterns, "^"+pattern+"$") } return func(w http.ResponseWriter, req *http.Request) { if origin := req.Header.Get(headerOrigin); origin != "" { for key, value := range o.Header(origin, req) { w.Header().Set(key, value) } if req.Method == "OPTIONS" { w.WriteHeader(200) return } } next.ServeHTTP(w, req) } }
go
func (o *Options) Handler(next http.Handler) http.HandlerFunc { // Allow default headers if nothing is specified. if len(o.AllowHeaders) == 0 { o.AllowHeaders = defaultAllowHeaders } for _, origin := range o.AllowOrigins { pattern := regexp.QuoteMeta(origin) pattern = strings.Replace(pattern, "\\*", ".*", -1) pattern = strings.Replace(pattern, "\\?", ".", -1) allowOriginPatterns = append(allowOriginPatterns, "^"+pattern+"$") } return func(w http.ResponseWriter, req *http.Request) { if origin := req.Header.Get(headerOrigin); origin != "" { for key, value := range o.Header(origin, req) { w.Header().Set(key, value) } if req.Method == "OPTIONS" { w.WriteHeader(200) return } } next.ServeHTTP(w, req) } }
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// Allows CORS for requests those match the provided options.
[ "Allows", "CORS", "for", "requests", "those", "match", "the", "provided", "options", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cors/cors.go#L120-L145
train
flynn/flynn
appliance/postgresql/process.go
initDB
func (p *Process) initDB() error { log := p.log.New("fn", "initDB", "dir", p.dataDir) log.Debug("starting initDB") // ignore errors, since the db could be already initialized // TODO(titanous): check errors when this is not the case _ = p.runCmd(exec.Command( p.binPath("initdb"), "--pgdata", p.dataDir, "--username=postgres", "--encoding=UTF-8", "--locale=en_US.UTF-8", )) return p.writeHBAConf() }
go
func (p *Process) initDB() error { log := p.log.New("fn", "initDB", "dir", p.dataDir) log.Debug("starting initDB") // ignore errors, since the db could be already initialized // TODO(titanous): check errors when this is not the case _ = p.runCmd(exec.Command( p.binPath("initdb"), "--pgdata", p.dataDir, "--username=postgres", "--encoding=UTF-8", "--locale=en_US.UTF-8", )) return p.writeHBAConf() }
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// initDB initializes the postgres data directory for a new dDB. This can fail // if the db has already been initialized, which is not a fatal error. // // This method should only be called by the primary of a shard. Standbys will // not need to initialize, as they will restore from an already running primary.
[ "initDB", "initializes", "the", "postgres", "data", "directory", "for", "a", "new", "dDB", ".", "This", "can", "fail", "if", "the", "db", "has", "already", "been", "initialized", "which", "is", "not", "a", "fatal", "error", ".", "This", "method", "should", "only", "be", "called", "by", "the", "primary", "of", "a", "shard", ".", "Standbys", "will", "not", "need", "to", "initialize", "as", "they", "will", "restore", "from", "an", "already", "running", "primary", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/appliance/postgresql/process.go#L809-L824
train
flynn/flynn
host/downloader/downloader.go
DownloadConfig
func (d *Downloader) DownloadConfig(dir string) (map[string]string, error) { if err := os.MkdirAll(dir, 0755); err != nil { return nil, fmt.Errorf("error creating config dir: %s", err) } paths := make(map[string]string, len(config)) for _, conf := range config { path, err := d.downloadGzippedFile(conf, dir, false) if err != nil { return nil, err } paths[conf] = path } return paths, nil }
go
func (d *Downloader) DownloadConfig(dir string) (map[string]string, error) { if err := os.MkdirAll(dir, 0755); err != nil { return nil, fmt.Errorf("error creating config dir: %s", err) } paths := make(map[string]string, len(config)) for _, conf := range config { path, err := d.downloadGzippedFile(conf, dir, false) if err != nil { return nil, err } paths[conf] = path } return paths, nil }
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// DownloadConfig downloads the Flynn config files using the tuf client to the // given dir.
[ "DownloadConfig", "downloads", "the", "Flynn", "config", "files", "using", "the", "tuf", "client", "to", "the", "given", "dir", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/host/downloader/downloader.go#L69-L82
train
flynn/flynn
pkg/cluster/utils.go
ExtractHostID
func ExtractHostID(id string) (string, error) { ids := strings.SplitN(id, "-", 2) if len(ids) != 2 || ids[0] == "" || ids[1] == "" { return "", errors.New("invalid ID") } return ids[0], nil }
go
func ExtractHostID(id string) (string, error) { ids := strings.SplitN(id, "-", 2) if len(ids) != 2 || ids[0] == "" || ids[1] == "" { return "", errors.New("invalid ID") } return ids[0], nil }
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// ExtractHostID returns the host ID component of a job ID, returning an error // if the given ID is invalid.
[ "ExtractHostID", "returns", "the", "host", "ID", "component", "of", "a", "job", "ID", "returning", "an", "error", "if", "the", "given", "ID", "is", "invalid", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/utils.go#L12-L18
train
flynn/flynn
pkg/cluster/utils.go
GenerateJobID
func GenerateJobID(hostID, uuid string) string { if uuid == "" { uuid = random.UUID() } return hostID + "-" + uuid }
go
func GenerateJobID(hostID, uuid string) string { if uuid == "" { uuid = random.UUID() } return hostID + "-" + uuid }
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// GenerateJobID returns a random job identifier, prefixed with the given host ID.
[ "GenerateJobID", "returns", "a", "random", "job", "identifier", "prefixed", "with", "the", "given", "host", "ID", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/utils.go#L31-L36
train
flynn/flynn
appliance/mongodb/process.go
waitForSync
func (p *Process) waitForSync(downstream *discoverd.Instance) { p.Logger.Debug("waiting for downstream sync") stopCh := make(chan struct{}) doneCh := make(chan struct{}) var once sync.Once p.cancelSyncWait = func() { once.Do(func() { close(stopCh); <-doneCh }) } go p.waitForSyncInner(downstream, stopCh, doneCh) }
go
func (p *Process) waitForSync(downstream *discoverd.Instance) { p.Logger.Debug("waiting for downstream sync") stopCh := make(chan struct{}) doneCh := make(chan struct{}) var once sync.Once p.cancelSyncWait = func() { once.Do(func() { close(stopCh); <-doneCh }) } go p.waitForSyncInner(downstream, stopCh, doneCh) }
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// waitForSync waits for downstream sync in goroutine
[ "waitForSync", "waits", "for", "downstream", "sync", "in", "goroutine" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/appliance/mongodb/process.go#L853-L865
train
flynn/flynn
appliance/mongodb/process.go
DialInfo
func (p *Process) DialInfo() *mgo.DialInfo { localhost := net.JoinHostPort("localhost", p.Port) info := &mgo.DialInfo{ Addrs: []string{localhost}, Timeout: 5 * time.Second, Direct: true, } if p.securityEnabled() { info.Addrs = []string{p.addr()} info.Database = "admin" info.Username = "flynn" info.Password = p.Password } return info }
go
func (p *Process) DialInfo() *mgo.DialInfo { localhost := net.JoinHostPort("localhost", p.Port) info := &mgo.DialInfo{ Addrs: []string{localhost}, Timeout: 5 * time.Second, Direct: true, } if p.securityEnabled() { info.Addrs = []string{p.addr()} info.Database = "admin" info.Username = "flynn" info.Password = p.Password } return info }
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// DialInfo returns dial info for connecting to the local process as the "flynn" user.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/appliance/mongodb/process.go#L868-L883
train
flynn/flynn
router/proxyproto/protocol.go
Read
func (p *conn) Read(b []byte) (int, error) { var err error p.initOnce.Do(func() { err = p.checkPrefix() }) if err != nil { return 0, err } if p.connBuf != nil { n := copy(b, p.connBuf) p.connBuf = p.connBuf[n:] if len(p.connBuf) == 0 { p.connBuf = nil } if len(b) == n { return n, nil } readN, err := p.Conn.Read(b[n:]) return readN + n, err } return p.Conn.Read(b) }
go
func (p *conn) Read(b []byte) (int, error) { var err error p.initOnce.Do(func() { err = p.checkPrefix() }) if err != nil { return 0, err } if p.connBuf != nil { n := copy(b, p.connBuf) p.connBuf = p.connBuf[n:] if len(p.connBuf) == 0 { p.connBuf = nil } if len(b) == n { return n, nil } readN, err := p.Conn.Read(b[n:]) return readN + n, err } return p.Conn.Read(b) }
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// Read checks for the PROXY protocol header when doing the initial scan. If // there is an error parsing the header, it is returned and the socket is // closed.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/router/proxyproto/protocol.go#L55-L74
train
flynn/flynn
logaggregator/aggregator.go
NewAggregator
func NewAggregator() *Aggregator { a := &Aggregator{ buffers: make(map[string]*buffer.Buffer), msgc: make(chan *rfc5424.Message, 1000), pausec: make(chan struct{}), } go a.run() return a }
go
func NewAggregator() *Aggregator { a := &Aggregator{ buffers: make(map[string]*buffer.Buffer), msgc: make(chan *rfc5424.Message, 1000), pausec: make(chan struct{}), } go a.run() return a }
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// NewAggregator creates a new running Aggregator.
[ "NewAggregator", "creates", "a", "new", "running", "Aggregator", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/logaggregator/aggregator.go#L22-L30
train
flynn/flynn
logaggregator/aggregator.go
Read
func (a *Aggregator) Read(id string) []*rfc5424.Message { return a.getBuffer(id).Read() }
go
func (a *Aggregator) Read(id string) []*rfc5424.Message { return a.getBuffer(id).Read() }
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// Read returns the buffered messages for id.
[ "Read", "returns", "the", "buffered", "messages", "for", "id", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/logaggregator/aggregator.go#L49-L51
train
flynn/flynn
logaggregator/aggregator.go
ReadAll
func (a *Aggregator) ReadAll() [][]*rfc5424.Message { // TODO(benburkert): restructure Aggregator & ring.Buffer to avoid nested locks a.bmu.Lock() defer a.bmu.Unlock() buffers := make([][]*rfc5424.Message, 0, len(a.buffers)) for _, buf := range a.buffers { buffers = append(buffers, buf.Read()) } return buffers }
go
func (a *Aggregator) ReadAll() [][]*rfc5424.Message { // TODO(benburkert): restructure Aggregator & ring.Buffer to avoid nested locks a.bmu.Lock() defer a.bmu.Unlock() buffers := make([][]*rfc5424.Message, 0, len(a.buffers)) for _, buf := range a.buffers { buffers = append(buffers, buf.Read()) } return buffers }
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// ReadAll returns all buffered messages.
[ "ReadAll", "returns", "all", "buffered", "messages", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/logaggregator/aggregator.go#L54-L65
train
flynn/flynn
logaggregator/aggregator.go
ReadAndSubscribe
func (a *Aggregator) ReadAndSubscribe(id string, msgc chan<- *rfc5424.Message, donec <-chan struct{}) []*rfc5424.Message { return a.getBuffer(id).ReadAndSubscribe(msgc, donec) }
go
func (a *Aggregator) ReadAndSubscribe(id string, msgc chan<- *rfc5424.Message, donec <-chan struct{}) []*rfc5424.Message { return a.getBuffer(id).ReadAndSubscribe(msgc, donec) }
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// Read returns the buffered messages and adds a subscriber channel for id.
[ "Read", "returns", "the", "buffered", "messages", "and", "adds", "a", "subscriber", "channel", "for", "id", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/logaggregator/aggregator.go#L68-L70
train
flynn/flynn
logaggregator/aggregator.go
Reset
func (a *Aggregator) Reset() { a.bmu.Lock() defer a.bmu.Unlock() for k, buf := range a.buffers { buf.Close() delete(a.buffers, k) } }
go
func (a *Aggregator) Reset() { a.bmu.Lock() defer a.bmu.Unlock() for k, buf := range a.buffers { buf.Close() delete(a.buffers, k) } }
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// Reset clears all buffered data and closes subscribers.
[ "Reset", "clears", "all", "buffered", "data", "and", "closes", "subscribers", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/logaggregator/aggregator.go#L73-L81
train
flynn/flynn
logaggregator/aggregator.go
Subscribe
func (a *Aggregator) Subscribe(id string, msgc chan<- *rfc5424.Message, donec <-chan struct{}) { a.getBuffer(id).Subscribe(msgc, donec) }
go
func (a *Aggregator) Subscribe(id string, msgc chan<- *rfc5424.Message, donec <-chan struct{}) { a.getBuffer(id).Subscribe(msgc, donec) }
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// Read adds a subscriber channel for id.
[ "Read", "adds", "a", "subscriber", "channel", "for", "id", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/logaggregator/aggregator.go#L91-L93
train
flynn/flynn
gitreceive/server.go
pktLine
func pktLine(w io.Writer, s string) error { _, err := fmt.Fprintf(w, "%04x%s", len(s)+4, s) return err }
go
func pktLine(w io.Writer, s string) error { _, err := fmt.Fprintf(w, "%04x%s", len(s)+4, s) return err }
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// Git HTTP line protocol functions
[ "Git", "HTTP", "line", "protocol", "functions" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/gitreceive/server.go#L268-L271
train
flynn/flynn
appliance/redis/cmd/flynn-redis-api/main.go
NewHandler
func NewHandler() *Handler { h := &Handler{ router: httprouter.New(), Logger: log15.New(), } h.router.POST("/clusters", h.servePostCluster) h.router.DELETE("/clusters", h.serveDeleteCluster) h.router.GET("/ping", h.serveGetPing) return h }
go
func NewHandler() *Handler { h := &Handler{ router: httprouter.New(), Logger: log15.New(), } h.router.POST("/clusters", h.servePostCluster) h.router.DELETE("/clusters", h.serveDeleteCluster) h.router.GET("/ping", h.serveGetPing) return h }
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// NewAPIHandler returns a new instance of APIHandler.
[ "NewAPIHandler", "returns", "a", "new", "instance", "of", "APIHandler", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/appliance/redis/cmd/flynn-redis-api/main.go#L169-L178
train
flynn/flynn
pkg/cluster/host.go
NewHost
func NewHost(id string, addr string, h *http.Client, tags map[string]string) *Host { if h == nil { h = http.DefaultClient } if !strings.HasPrefix(addr, "http") { addr = "http://" + addr } return &Host{ id: id, tags: tags, c: &httpclient.Client{ ErrNotFound: ErrNotFound, URL: addr, HTTP: h, }, } }
go
func NewHost(id string, addr string, h *http.Client, tags map[string]string) *Host { if h == nil { h = http.DefaultClient } if !strings.HasPrefix(addr, "http") { addr = "http://" + addr } return &Host{ id: id, tags: tags, c: &httpclient.Client{ ErrNotFound: ErrNotFound, URL: addr, HTTP: h, }, } }
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// NewHost creates a new Host that uses client to communicate with it. // addr is used by Attach.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L30-L46
train
flynn/flynn
pkg/cluster/host.go
ListJobs
func (c *Host) ListJobs() (map[string]host.ActiveJob, error) { var jobs map[string]host.ActiveJob err := c.c.Get("/host/jobs", &jobs) return jobs, err }
go
func (c *Host) ListJobs() (map[string]host.ActiveJob, error) { var jobs map[string]host.ActiveJob err := c.c.Get("/host/jobs", &jobs) return jobs, err }
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// ListJobs lists all jobs on the host.
[ "ListJobs", "lists", "all", "jobs", "on", "the", "host", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L93-L97
train
flynn/flynn
pkg/cluster/host.go
AddJob
func (c *Host) AddJob(job *host.Job) error { return c.c.Put(fmt.Sprintf("/host/jobs/%s", job.ID), job, nil) }
go
func (c *Host) AddJob(job *host.Job) error { return c.c.Put(fmt.Sprintf("/host/jobs/%s", job.ID), job, nil) }
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// AddJob runs a job on the host.
[ "AddJob", "runs", "a", "job", "on", "the", "host", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L107-L109
train
flynn/flynn
pkg/cluster/host.go
GetJob
func (c *Host) GetJob(id string) (*host.ActiveJob, error) { var res host.ActiveJob err := c.c.Get(fmt.Sprintf("/host/jobs/%s", id), &res) return &res, err }
go
func (c *Host) GetJob(id string) (*host.ActiveJob, error) { var res host.ActiveJob err := c.c.Get(fmt.Sprintf("/host/jobs/%s", id), &res) return &res, err }
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// GetJob retrieves job details by ID.
[ "GetJob", "retrieves", "job", "details", "by", "ID", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L112-L116
train
flynn/flynn
pkg/cluster/host.go
StopJob
func (c *Host) StopJob(id string) error { return c.c.Delete(fmt.Sprintf("/host/jobs/%s", id)) }
go
func (c *Host) StopJob(id string) error { return c.c.Delete(fmt.Sprintf("/host/jobs/%s", id)) }
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// StopJob stops a running job.
[ "StopJob", "stops", "a", "running", "job", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L119-L121
train
flynn/flynn
pkg/cluster/host.go
SignalJob
func (c *Host) SignalJob(id string, sig int) error { return c.c.Put(fmt.Sprintf("/host/jobs/%s/signal/%d", id, sig), nil, nil) }
go
func (c *Host) SignalJob(id string, sig int) error { return c.c.Put(fmt.Sprintf("/host/jobs/%s/signal/%d", id, sig), nil, nil) }
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// SignalJob sends a signal to a running job.
[ "SignalJob", "sends", "a", "signal", "to", "a", "running", "job", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L124-L126
train
flynn/flynn
pkg/cluster/host.go
DiscoverdDeregisterJob
func (c *Host) DiscoverdDeregisterJob(id string) error { return c.c.Put(fmt.Sprintf("/host/jobs/%s/discoverd-deregister", id), nil, nil) }
go
func (c *Host) DiscoverdDeregisterJob(id string) error { return c.c.Put(fmt.Sprintf("/host/jobs/%s/discoverd-deregister", id), nil, nil) }
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// DiscoverdDeregisterJob requests a job to deregister from service discovery.
[ "DiscoverdDeregisterJob", "requests", "a", "job", "to", "deregister", "from", "service", "discovery", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L129-L131
train
flynn/flynn
pkg/cluster/host.go
StreamEvents
func (c *Host) StreamEvents(id string, ch chan *host.Event) (stream.Stream, error) { r := fmt.Sprintf("/host/jobs/%s", id) if id == "all" { r = "/host/jobs" } return c.c.ResumingStream("GET", r, ch) }
go
func (c *Host) StreamEvents(id string, ch chan *host.Event) (stream.Stream, error) { r := fmt.Sprintf("/host/jobs/%s", id) if id == "all" { r = "/host/jobs" } return c.c.ResumingStream("GET", r, ch) }
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// StreamEvents about job state changes to ch. id may be "all" or a single // job ID.
[ "StreamEvents", "about", "job", "state", "changes", "to", "ch", ".", "id", "may", "be", "all", "or", "a", "single", "job", "ID", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L135-L141
train
flynn/flynn
pkg/cluster/host.go
CreateVolume
func (c *Host) CreateVolume(providerId string, info *volume.Info) error { return c.c.Post(fmt.Sprintf("/storage/providers/%s/volumes", providerId), info, info) }
go
func (c *Host) CreateVolume(providerId string, info *volume.Info) error { return c.c.Post(fmt.Sprintf("/storage/providers/%s/volumes", providerId), info, info) }
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// CreateVolume a new volume with the given configuration. // When in doubt, use a providerId of "default".
[ "CreateVolume", "a", "new", "volume", "with", "the", "given", "configuration", ".", "When", "in", "doubt", "use", "a", "providerId", "of", "default", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L145-L147
train
flynn/flynn
pkg/cluster/host.go
GetVolume
func (c *Host) GetVolume(volumeID string) (*volume.Info, error) { var volume volume.Info return &volume, c.c.Get(fmt.Sprintf("/storage/volumes/%s", volumeID), &volume) }
go
func (c *Host) GetVolume(volumeID string) (*volume.Info, error) { var volume volume.Info return &volume, c.c.Get(fmt.Sprintf("/storage/volumes/%s", volumeID), &volume) }
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// GetVolume gets a volume by ID
[ "GetVolume", "gets", "a", "volume", "by", "ID" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L150-L153
train
flynn/flynn
pkg/cluster/host.go
ListVolumes
func (c *Host) ListVolumes() ([]*volume.Info, error) { var volumes []*volume.Info return volumes, c.c.Get("/storage/volumes", &volumes) }
go
func (c *Host) ListVolumes() ([]*volume.Info, error) { var volumes []*volume.Info return volumes, c.c.Get("/storage/volumes", &volumes) }
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// ListVolume returns a list of volume IDs
[ "ListVolume", "returns", "a", "list", "of", "volume", "IDs" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L156-L159
train
flynn/flynn
pkg/cluster/host.go
StreamVolumes
func (c *Host) StreamVolumes(ch chan *volume.Event) (stream.Stream, error) { return c.c.ResumingStream("GET", "/storage/volumes", ch) }
go
func (c *Host) StreamVolumes(ch chan *volume.Event) (stream.Stream, error) { return c.c.ResumingStream("GET", "/storage/volumes", ch) }
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// StreamVolumes streams volume events to the given channel
[ "StreamVolumes", "streams", "volume", "events", "to", "the", "given", "channel" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L162-L164
train
flynn/flynn
pkg/cluster/host.go
DestroyVolume
func (c *Host) DestroyVolume(volumeID string) error { return c.c.Delete(fmt.Sprintf("/storage/volumes/%s", volumeID)) }
go
func (c *Host) DestroyVolume(volumeID string) error { return c.c.Delete(fmt.Sprintf("/storage/volumes/%s", volumeID)) }
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// DestroyVolume deletes a volume by ID
[ "DestroyVolume", "deletes", "a", "volume", "by", "ID" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L167-L169
train
flynn/flynn
pkg/cluster/host.go
CreateSnapshot
func (c *Host) CreateSnapshot(volumeID string) (*volume.Info, error) { var res volume.Info err := c.c.Put(fmt.Sprintf("/storage/volumes/%s/snapshot", volumeID), nil, &res) return &res, err }
go
func (c *Host) CreateSnapshot(volumeID string) (*volume.Info, error) { var res volume.Info err := c.c.Put(fmt.Sprintf("/storage/volumes/%s/snapshot", volumeID), nil, &res) return &res, err }
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// Create snapshot creates a snapshot of a volume on a host.
[ "Create", "snapshot", "creates", "a", "snapshot", "of", "a", "volume", "on", "a", "host", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L172-L176
train
flynn/flynn
pkg/cluster/host.go
PullSnapshot
func (c *Host) PullSnapshot(receiveVolID string, sourceHostID string, sourceSnapID string) (*volume.Info, error) { var res volume.Info pull := volume.PullCoordinate{ HostID: sourceHostID, SnapshotID: sourceSnapID, } err := c.c.Post(fmt.Sprintf("/storage/volumes/%s/pull_snapshot", receiveVolID), pull, &res) return &res, err }
go
func (c *Host) PullSnapshot(receiveVolID string, sourceHostID string, sourceSnapID string) (*volume.Info, error) { var res volume.Info pull := volume.PullCoordinate{ HostID: sourceHostID, SnapshotID: sourceSnapID, } err := c.c.Post(fmt.Sprintf("/storage/volumes/%s/pull_snapshot", receiveVolID), pull, &res) return &res, err }
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// PullSnapshot requests the host pull a snapshot from another host onto one of // its volumes. Returns the info for the new snapshot.
[ "PullSnapshot", "requests", "the", "host", "pull", "a", "snapshot", "from", "another", "host", "onto", "one", "of", "its", "volumes", ".", "Returns", "the", "info", "for", "the", "new", "snapshot", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L180-L188
train
flynn/flynn
pkg/cluster/host.go
PullImages
func (c *Host) PullImages(repository, configDir, version string, tufDB io.Reader, ch chan *ct.ImagePullInfo) (stream.Stream, error) { header := http.Header{"Content-Type": {"application/octet-stream"}} query := make(url.Values) query.Set("repository", repository) query.Set("config-dir", configDir) query.Set("version", version) path := "/host/pull/images?" + query.Encode() return c.c.StreamWithHeader("POST", path, header, tufDB, ch) }
go
func (c *Host) PullImages(repository, configDir, version string, tufDB io.Reader, ch chan *ct.ImagePullInfo) (stream.Stream, error) { header := http.Header{"Content-Type": {"application/octet-stream"}} query := make(url.Values) query.Set("repository", repository) query.Set("config-dir", configDir) query.Set("version", version) path := "/host/pull/images?" + query.Encode() return c.c.StreamWithHeader("POST", path, header, tufDB, ch) }
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// PullImages pulls images from a TUF repository using the local TUF file in tufDB
[ "PullImages", "pulls", "images", "from", "a", "TUF", "repository", "using", "the", "local", "TUF", "file", "in", "tufDB" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L204-L212
train
flynn/flynn
pkg/cluster/host.go
PullBinariesAndConfig
func (c *Host) PullBinariesAndConfig(repository, binDir, configDir, version string, tufDB io.Reader) (map[string]string, error) { query := make(url.Values) query.Set("repository", repository) query.Set("bin-dir", binDir) query.Set("config-dir", configDir) query.Set("version", version) path := "/host/pull/binaries?" + query.Encode() var paths map[string]string return paths, c.c.Post(path, tufDB, &paths) }
go
func (c *Host) PullBinariesAndConfig(repository, binDir, configDir, version string, tufDB io.Reader) (map[string]string, error) { query := make(url.Values) query.Set("repository", repository) query.Set("bin-dir", binDir) query.Set("config-dir", configDir) query.Set("version", version) path := "/host/pull/binaries?" + query.Encode() var paths map[string]string return paths, c.c.Post(path, tufDB, &paths) }
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// PullBinariesAndConfig pulls binaries and config from a TUF repository using the local TUF file in tufDB
[ "PullBinariesAndConfig", "pulls", "binaries", "and", "config", "from", "a", "TUF", "repository", "using", "the", "local", "TUF", "file", "in", "tufDB" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/pkg/cluster/host.go#L215-L224
train
flynn/flynn
discoverd/server/handler.go
proxyWhitelisted
func proxyWhitelisted(r *http.Request) bool { for _, url := range []string{"/raft/promote", "/raft/demote", "/shutdown"} { if strings.HasPrefix(r.URL.Path, url) { return true } } return false }
go
func proxyWhitelisted(r *http.Request) bool { for _, url := range []string{"/raft/promote", "/raft/demote", "/shutdown"} { if strings.HasPrefix(r.URL.Path, url) { return true } } return false }
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// Whitelisted endpoints won't be proxied.
[ "Whitelisted", "endpoints", "won", "t", "be", "proxied", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L115-L122
train
flynn/flynn
discoverd/server/handler.go
servePutService
func (h *Handler) servePutService(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Retrieve the path parameter. service := params.ByName("service") if err := ValidServiceName(service); err != nil { hh.ValidationError(w, "", err.Error()) return } // Read config from the request. config := &discoverd.ServiceConfig{} if err := hh.DecodeJSON(r, config); err != nil { hh.Error(w, err) return } // Add the service to the store. if err := h.Store.AddService(service, config); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if IsServiceExists(err) { hh.ObjectExistsError(w, err.Error()) return } else if err != nil { hh.Error(w, err) return } }
go
func (h *Handler) servePutService(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Retrieve the path parameter. service := params.ByName("service") if err := ValidServiceName(service); err != nil { hh.ValidationError(w, "", err.Error()) return } // Read config from the request. config := &discoverd.ServiceConfig{} if err := hh.DecodeJSON(r, config); err != nil { hh.Error(w, err) return } // Add the service to the store. if err := h.Store.AddService(service, config); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if IsServiceExists(err) { hh.ObjectExistsError(w, err.Error()) return } else if err != nil { hh.Error(w, err) return } }
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// servePutService creates a service.
[ "servePutService", "creates", "a", "service", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L151-L177
train
flynn/flynn
discoverd/server/handler.go
serveDeleteService
func (h *Handler) serveDeleteService(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Retrieve the path parameter. service := params.ByName("service") if err := ValidServiceName(service); err != nil { hh.ValidationError(w, "", err.Error()) return } // Delete from the store. if err := h.Store.RemoveService(params.ByName("service")); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if IsNotFound(err) { hh.ObjectNotFoundError(w, err.Error()) return } else if err != nil { hh.Error(w, err) return } }
go
func (h *Handler) serveDeleteService(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Retrieve the path parameter. service := params.ByName("service") if err := ValidServiceName(service); err != nil { hh.ValidationError(w, "", err.Error()) return } // Delete from the store. if err := h.Store.RemoveService(params.ByName("service")); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if IsNotFound(err) { hh.ObjectNotFoundError(w, err.Error()) return } else if err != nil { hh.Error(w, err) return } }
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// serveDeleteService removes a service from the store by name.
[ "serveDeleteService", "removes", "a", "service", "from", "the", "store", "by", "name", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L180-L199
train
flynn/flynn
discoverd/server/handler.go
serveGetService
func (h *Handler) serveGetService(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // This should only return a stream if the Accept header is // text/event-stream (and return a 406 otherwise), but we // always return a stream due to Go's http.Client not // maintaining headers through a redirect. // // See https://github.com/flynn/flynn/issues/1880 h.serveStream(w, params, discoverd.EventKindAll) }
go
func (h *Handler) serveGetService(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // This should only return a stream if the Accept header is // text/event-stream (and return a 406 otherwise), but we // always return a stream due to Go's http.Client not // maintaining headers through a redirect. // // See https://github.com/flynn/flynn/issues/1880 h.serveStream(w, params, discoverd.EventKindAll) }
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// serveGetService streams service events to the client.
[ "serveGetService", "streams", "service", "events", "to", "the", "client", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L202-L210
train
flynn/flynn
discoverd/server/handler.go
servePutServiceMeta
func (h *Handler) servePutServiceMeta(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Read the metadata from the request. meta := &discoverd.ServiceMeta{} if err := hh.DecodeJSON(r, meta); err != nil { hh.Error(w, err) return } // Update the meta in the store. if err := h.Store.SetServiceMeta(params.ByName("service"), meta); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if IsNotFound(err) { hh.ObjectNotFoundError(w, err.Error()) return } else if err != nil { hh.Error(w, err) return } // Write meta back to response. hh.JSON(w, 200, meta) }
go
func (h *Handler) servePutServiceMeta(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Read the metadata from the request. meta := &discoverd.ServiceMeta{} if err := hh.DecodeJSON(r, meta); err != nil { hh.Error(w, err) return } // Update the meta in the store. if err := h.Store.SetServiceMeta(params.ByName("service"), meta); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if IsNotFound(err) { hh.ObjectNotFoundError(w, err.Error()) return } else if err != nil { hh.Error(w, err) return } // Write meta back to response. hh.JSON(w, 200, meta) }
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// serveServiceMeta sets the metadata for a service.
[ "serveServiceMeta", "sets", "the", "metadata", "for", "a", "service", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L213-L235
train
flynn/flynn
discoverd/server/handler.go
serveGetServiceMeta
func (h *Handler) serveGetServiceMeta(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Read path parameter. service := params.ByName("service") // Read meta from the store. meta := h.Store.ServiceMeta(service) if meta == nil { hh.ObjectNotFoundError(w, "service meta not found") return } // Write meta to the response. hh.JSON(w, 200, meta) }
go
func (h *Handler) serveGetServiceMeta(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Read path parameter. service := params.ByName("service") // Read meta from the store. meta := h.Store.ServiceMeta(service) if meta == nil { hh.ObjectNotFoundError(w, "service meta not found") return } // Write meta to the response. hh.JSON(w, 200, meta) }
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// serveGetServiceMeta returns the metadata for a service.
[ "serveGetServiceMeta", "returns", "the", "metadata", "for", "a", "service", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L238-L251
train
flynn/flynn
discoverd/server/handler.go
servePutInstance
func (h *Handler) servePutInstance(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Read path parameter. service := params.ByName("service") // Read instance from request. inst := &discoverd.Instance{} if err := json.NewDecoder(r.Body).Decode(inst); err != nil { hh.Error(w, err) return } // Ensure instance is valid. if err := inst.Valid(); err != nil { hh.ValidationError(w, "", err.Error()) return } // Add instance to service in the store. if err := h.Store.AddInstance(service, inst); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if IsNotFound(err) { hh.ObjectNotFoundError(w, err.Error()) return } else if err != nil { hh.Error(w, err) return } }
go
func (h *Handler) servePutInstance(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Read path parameter. service := params.ByName("service") // Read instance from request. inst := &discoverd.Instance{} if err := json.NewDecoder(r.Body).Decode(inst); err != nil { hh.Error(w, err) return } // Ensure instance is valid. if err := inst.Valid(); err != nil { hh.ValidationError(w, "", err.Error()) return } // Add instance to service in the store. if err := h.Store.AddInstance(service, inst); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if IsNotFound(err) { hh.ObjectNotFoundError(w, err.Error()) return } else if err != nil { hh.Error(w, err) return } }
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// servePutInstance adds an instance to a service.
[ "servePutInstance", "adds", "an", "instance", "to", "a", "service", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L254-L282
train
flynn/flynn
discoverd/server/handler.go
serveDeleteInstance
func (h *Handler) serveDeleteInstance(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Retrieve path parameters. service := params.ByName("service") instanceID := params.ByName("instance_id") // Remove instance from the store. if err := h.Store.RemoveInstance(service, instanceID); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if IsNotFound(err) { hh.ObjectNotFoundError(w, err.Error()) return } else if err != nil { hh.Error(w, err) return } }
go
func (h *Handler) serveDeleteInstance(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Retrieve path parameters. service := params.ByName("service") instanceID := params.ByName("instance_id") // Remove instance from the store. if err := h.Store.RemoveInstance(service, instanceID); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if IsNotFound(err) { hh.ObjectNotFoundError(w, err.Error()) return } else if err != nil { hh.Error(w, err) return } }
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// serveDeleteInstance removes an instance from the store by name.
[ "serveDeleteInstance", "removes", "an", "instance", "from", "the", "store", "by", "name", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L285-L301
train
flynn/flynn
discoverd/server/handler.go
serveGetInstances
func (h *Handler) serveGetInstances(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // If the client is requesting a stream, then handle as a stream. if strings.Contains(r.Header.Get("Accept"), "text/event-stream") { h.serveStream(w, params, discoverd.EventKindUp|discoverd.EventKindUpdate|discoverd.EventKindDown) return } // Otherwise read instances from the store. instances, err := h.Store.Instances(params.ByName("service")) if err != nil { hh.Error(w, err) return } else if instances == nil { hh.ObjectNotFoundError(w, fmt.Sprintf("service not found: %q", params.ByName("service"))) return } // Write instances to the response. hh.JSON(w, 200, instances) }
go
func (h *Handler) serveGetInstances(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // If the client is requesting a stream, then handle as a stream. if strings.Contains(r.Header.Get("Accept"), "text/event-stream") { h.serveStream(w, params, discoverd.EventKindUp|discoverd.EventKindUpdate|discoverd.EventKindDown) return } // Otherwise read instances from the store. instances, err := h.Store.Instances(params.ByName("service")) if err != nil { hh.Error(w, err) return } else if instances == nil { hh.ObjectNotFoundError(w, fmt.Sprintf("service not found: %q", params.ByName("service"))) return } // Write instances to the response. hh.JSON(w, 200, instances) }
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// serveGetInstances returns a list of all instances for a service.
[ "serveGetInstances", "returns", "a", "list", "of", "all", "instances", "for", "a", "service", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L304-L323
train
flynn/flynn
discoverd/server/handler.go
servePutLeader
func (h *Handler) servePutLeader(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Retrieve path parameters. service := params.ByName("service") // Check if the service allows manual leader election. config := h.Store.Config(service) if config == nil || config.LeaderType != discoverd.LeaderTypeManual { hh.ValidationError(w, "", "service leader election type is not manual") return } // Read instance from the request. inst := &discoverd.Instance{} if err := hh.DecodeJSON(r, inst); err != nil { hh.Error(w, err) return } // Manually set the leader on the service. if err := h.Store.SetServiceLeader(service, inst.ID); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if err != nil { hh.Error(w, err) return } }
go
func (h *Handler) servePutLeader(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Retrieve path parameters. service := params.ByName("service") // Check if the service allows manual leader election. config := h.Store.Config(service) if config == nil || config.LeaderType != discoverd.LeaderTypeManual { hh.ValidationError(w, "", "service leader election type is not manual") return } // Read instance from the request. inst := &discoverd.Instance{} if err := hh.DecodeJSON(r, inst); err != nil { hh.Error(w, err) return } // Manually set the leader on the service. if err := h.Store.SetServiceLeader(service, inst.ID); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if err != nil { hh.Error(w, err) return } }
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// servePutLeader sets the leader for a service.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L326-L352
train
flynn/flynn
discoverd/server/handler.go
serveGetLeader
func (h *Handler) serveGetLeader(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Process as a stream if that's what the client wants. if strings.Contains(r.Header.Get("Accept"), "text/event-stream") { h.serveStream(w, params, discoverd.EventKindLeader) return } // Otherwise retrieve the current leader. service := params.ByName("service") leader, err := h.Store.ServiceLeader(service) if err != nil { hh.Error(w, err) return } else if leader == nil { hh.ObjectNotFoundError(w, "no leader found") return } // Write leader to the response. hh.JSON(w, 200, leader) }
go
func (h *Handler) serveGetLeader(w http.ResponseWriter, r *http.Request, params httprouter.Params) { // Process as a stream if that's what the client wants. if strings.Contains(r.Header.Get("Accept"), "text/event-stream") { h.serveStream(w, params, discoverd.EventKindLeader) return } // Otherwise retrieve the current leader. service := params.ByName("service") leader, err := h.Store.ServiceLeader(service) if err != nil { hh.Error(w, err) return } else if leader == nil { hh.ObjectNotFoundError(w, "no leader found") return } // Write leader to the response. hh.JSON(w, 200, leader) }
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// serveGetLeader returns the current leader for a service.
[ "serveGetLeader", "returns", "the", "current", "leader", "for", "a", "service", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L355-L375
train
flynn/flynn
discoverd/server/handler.go
servePromote
func (h *Handler) servePromote(w http.ResponseWriter, r *http.Request, params httprouter.Params) { if err := h.Main.Promote(); err != nil { hh.Error(w, err) return } }
go
func (h *Handler) servePromote(w http.ResponseWriter, r *http.Request, params httprouter.Params) { if err := h.Main.Promote(); err != nil { hh.Error(w, err) return } }
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// servePromote attempts to promote this discoverd peer to a raft peer
[ "servePromote", "attempts", "to", "promote", "this", "discoverd", "peer", "to", "a", "raft", "peer" ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L397-L402
train
flynn/flynn
discoverd/server/handler.go
serveDemote
func (h *Handler) serveDemote(w http.ResponseWriter, r *http.Request, params httprouter.Params) { if err := h.Main.Demote(); err != nil { hh.Error(w, err) return } }
go
func (h *Handler) serveDemote(w http.ResponseWriter, r *http.Request, params httprouter.Params) { if err := h.Main.Demote(); err != nil { hh.Error(w, err) return } }
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// serveDemote attempts to demote this peer from a raft peer to a proxy
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L405-L410
train
flynn/flynn
discoverd/server/handler.go
serveStream
func (h *Handler) serveStream(w http.ResponseWriter, params httprouter.Params, kind discoverd.EventKind) { // Create a buffered channel to receive events. ch := make(chan *discoverd.Event, StreamBufferSize) // Subscribe to events on the store. service := params.ByName("service") stream := h.Store.Subscribe(service, true, kind, ch) // Create and serve an SSE stream. s := sse.NewStream(w, ch, nil) s.Serve() s.Wait() stream.Close() // Check if there was an error while closing. if err := stream.Err(); err != nil { s.CloseWithError(err) } }
go
func (h *Handler) serveStream(w http.ResponseWriter, params httprouter.Params, kind discoverd.EventKind) { // Create a buffered channel to receive events. ch := make(chan *discoverd.Event, StreamBufferSize) // Subscribe to events on the store. service := params.ByName("service") stream := h.Store.Subscribe(service, true, kind, ch) // Create and serve an SSE stream. s := sse.NewStream(w, ch, nil) s.Serve() s.Wait() stream.Close() // Check if there was an error while closing. if err := stream.Err(); err != nil { s.CloseWithError(err) } }
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// serveStream creates a subscription and streams out events in SSE format.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L413-L431
train
flynn/flynn
discoverd/server/handler.go
serveGetRaftLeader
func (h *Handler) serveGetRaftLeader(w http.ResponseWriter, r *http.Request, params httprouter.Params) { leader := h.Store.Leader() if leader == "" { hh.ServiceUnavailableError(w, ErrNoKnownLeader.Error()) return } hh.JSON(w, 200, dt.RaftLeader{Host: h.Store.Leader()}) }
go
func (h *Handler) serveGetRaftLeader(w http.ResponseWriter, r *http.Request, params httprouter.Params) { leader := h.Store.Leader() if leader == "" { hh.ServiceUnavailableError(w, ErrNoKnownLeader.Error()) return } hh.JSON(w, 200, dt.RaftLeader{Host: h.Store.Leader()}) }
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// serveGetRaftLeader returns the current raft leader.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L434-L442
train
flynn/flynn
discoverd/server/handler.go
serveGetRaftPeers
func (h *Handler) serveGetRaftPeers(w http.ResponseWriter, r *http.Request, params httprouter.Params) { peers, err := h.Store.GetPeers() if err != nil { hh.Error(w, err) } hh.JSON(w, 200, peers) }
go
func (h *Handler) serveGetRaftPeers(w http.ResponseWriter, r *http.Request, params httprouter.Params) { peers, err := h.Store.GetPeers() if err != nil { hh.Error(w, err) } hh.JSON(w, 200, peers) }
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// serveGetRaftPeers returns the current raft peers.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L445-L452
train
flynn/flynn
discoverd/server/handler.go
servePutRaftPeer
func (h *Handler) servePutRaftPeer(w http.ResponseWriter, r *http.Request, params httprouter.Params) { peer := params.ByName("peer") if err := h.Store.AddPeer(peer); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if err != nil { hh.Error(w, err) return } var targetLogIndex dt.TargetLogIndex targetLogIndex.LastIndex = h.Store.LastIndex() hh.JSON(w, 200, targetLogIndex) }
go
func (h *Handler) servePutRaftPeer(w http.ResponseWriter, r *http.Request, params httprouter.Params) { peer := params.ByName("peer") if err := h.Store.AddPeer(peer); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if err != nil { hh.Error(w, err) return } var targetLogIndex dt.TargetLogIndex targetLogIndex.LastIndex = h.Store.LastIndex() hh.JSON(w, 200, targetLogIndex) }
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// servePutRaftNodes joins a peer to the store cluster.
[ "servePutRaftNodes", "joins", "a", "peer", "to", "the", "store", "cluster", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L455-L467
train
flynn/flynn
discoverd/server/handler.go
serveDeleteRaftPeer
func (h *Handler) serveDeleteRaftPeer(w http.ResponseWriter, r *http.Request, params httprouter.Params) { peer := params.ByName("peer") if err := h.Store.RemovePeer(peer); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if err != nil { hh.Error(w, err) return } }
go
func (h *Handler) serveDeleteRaftPeer(w http.ResponseWriter, r *http.Request, params httprouter.Params) { peer := params.ByName("peer") if err := h.Store.RemovePeer(peer); err == ErrNotLeader { h.redirectToLeader(w, r) return } else if err != nil { hh.Error(w, err) return } }
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// serveDeleteRaftNodes removes a peer to the store cluster.
[ "serveDeleteRaftNodes", "removes", "a", "peer", "to", "the", "store", "cluster", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L470-L479
train
flynn/flynn
discoverd/server/handler.go
redirectToLeader
func (h *Handler) redirectToLeader(w http.ResponseWriter, r *http.Request) { // Find the current leader. leader := h.Store.Leader() if leader == "" { hh.ServiceUnavailableError(w, ErrNoKnownLeader.Error()) return } redirectToHost(w, r, leader) }
go
func (h *Handler) redirectToLeader(w http.ResponseWriter, r *http.Request) { // Find the current leader. leader := h.Store.Leader() if leader == "" { hh.ServiceUnavailableError(w, ErrNoKnownLeader.Error()) return } redirectToHost(w, r, leader) }
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// redirectToLeader redirects the request to the current known leader.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/handler.go#L482-L491
train
flynn/flynn
discoverd/server/store.go
NewStore
func NewStore(path string) *Store { return &Store{ path: path, data: newRaftData(), subscribers: make(map[string]*list.List), leaderCh: make(chan bool), heartbeats: make(map[instanceKey]time.Time), closing: make(chan struct{}), HeartbeatTimeout: 1000 * time.Millisecond, ElectionTimeout: 1000 * time.Millisecond, LeaderLeaseTimeout: 500 * time.Millisecond, CommitTimeout: 50 * time.Millisecond, InstanceTTL: DefaultInstanceTTL, ExpiryCheckInterval: DefaultExpiryCheckInterval, LogOutput: os.Stderr, Now: time.Now, } }
go
func NewStore(path string) *Store { return &Store{ path: path, data: newRaftData(), subscribers: make(map[string]*list.List), leaderCh: make(chan bool), heartbeats: make(map[instanceKey]time.Time), closing: make(chan struct{}), HeartbeatTimeout: 1000 * time.Millisecond, ElectionTimeout: 1000 * time.Millisecond, LeaderLeaseTimeout: 500 * time.Millisecond, CommitTimeout: 50 * time.Millisecond, InstanceTTL: DefaultInstanceTTL, ExpiryCheckInterval: DefaultExpiryCheckInterval, LogOutput: os.Stderr, Now: time.Now, } }
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// NewStore returns an instance of Store.
[ "NewStore", "returns", "an", "instance", "of", "Store", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L115-L137
train
flynn/flynn
discoverd/server/store.go
Open
func (s *Store) Open() error { s.mu.Lock() defer s.mu.Unlock() // Set up logging. s.logger = log.New(s.LogOutput, "[discoverd] ", log.LstdFlags) // Require listener & advertise address. if s.Listener == nil { return ErrListenerRequired } else if s.Advertise == nil { return ErrAdvertiseRequired } // Create root directory. if err := os.MkdirAll(s.path, 0777); err != nil { return err } // Create raft configuration. config := raft.DefaultConfig() config.HeartbeatTimeout = s.HeartbeatTimeout config.ElectionTimeout = s.ElectionTimeout config.LeaderLeaseTimeout = s.LeaderLeaseTimeout config.CommitTimeout = s.CommitTimeout config.LogOutput = s.LogOutput config.EnableSingleNode = s.EnableSingleNode config.ShutdownOnRemove = false // Create multiplexing transport layer. raftLayer := newRaftLayer(s.Listener, s.Advertise) // Begin listening to TCP port. s.transport = raft.NewNetworkTransport(raftLayer, 3, 10*time.Second, os.Stderr) // Setup storage layers. s.peerStore = raft.NewJSONPeers(s.path, s.transport) stableStore, err := raftboltdb.NewBoltStore(filepath.Join(s.path, "raft.db")) if err != nil { return fmt.Errorf("stable store: %s", err) } s.stableStore = stableStore // Wrap the store in a LogCache to improve performance cacheStore, err := raft.NewLogCache(512, stableStore) if err != nil { stableStore.Close() return fmt.Errorf("log cache: %s", err) } // Create the snapshot store. ss, err := raft.NewFileSnapshotStore(s.path, 2, os.Stderr) if err != nil { return fmt.Errorf("snapshot store: %s", err) } // Create raft log. // // The mutex must be unlocked as initializing the raft store may // call back into methods which acquire the lock (e.g. Restore) s.mu.Unlock() r, err := raft.NewRaft(config, s, cacheStore, stableStore, ss, s.peerStore, s.transport) s.mu.Lock() if err != nil { return fmt.Errorf("raft: %s", err) } // make sure the store was not closed whilst the mutex was unlocked select { case <-s.closing: return ErrShutdown default: } s.raft = r // Start goroutine to monitor leadership changes. s.wg.Add(1) go s.monitorLeaderCh() // Start goroutine to check for instance expiry. s.wg.Add(1) go s.expirer() return nil }
go
func (s *Store) Open() error { s.mu.Lock() defer s.mu.Unlock() // Set up logging. s.logger = log.New(s.LogOutput, "[discoverd] ", log.LstdFlags) // Require listener & advertise address. if s.Listener == nil { return ErrListenerRequired } else if s.Advertise == nil { return ErrAdvertiseRequired } // Create root directory. if err := os.MkdirAll(s.path, 0777); err != nil { return err } // Create raft configuration. config := raft.DefaultConfig() config.HeartbeatTimeout = s.HeartbeatTimeout config.ElectionTimeout = s.ElectionTimeout config.LeaderLeaseTimeout = s.LeaderLeaseTimeout config.CommitTimeout = s.CommitTimeout config.LogOutput = s.LogOutput config.EnableSingleNode = s.EnableSingleNode config.ShutdownOnRemove = false // Create multiplexing transport layer. raftLayer := newRaftLayer(s.Listener, s.Advertise) // Begin listening to TCP port. s.transport = raft.NewNetworkTransport(raftLayer, 3, 10*time.Second, os.Stderr) // Setup storage layers. s.peerStore = raft.NewJSONPeers(s.path, s.transport) stableStore, err := raftboltdb.NewBoltStore(filepath.Join(s.path, "raft.db")) if err != nil { return fmt.Errorf("stable store: %s", err) } s.stableStore = stableStore // Wrap the store in a LogCache to improve performance cacheStore, err := raft.NewLogCache(512, stableStore) if err != nil { stableStore.Close() return fmt.Errorf("log cache: %s", err) } // Create the snapshot store. ss, err := raft.NewFileSnapshotStore(s.path, 2, os.Stderr) if err != nil { return fmt.Errorf("snapshot store: %s", err) } // Create raft log. // // The mutex must be unlocked as initializing the raft store may // call back into methods which acquire the lock (e.g. Restore) s.mu.Unlock() r, err := raft.NewRaft(config, s, cacheStore, stableStore, ss, s.peerStore, s.transport) s.mu.Lock() if err != nil { return fmt.Errorf("raft: %s", err) } // make sure the store was not closed whilst the mutex was unlocked select { case <-s.closing: return ErrShutdown default: } s.raft = r // Start goroutine to monitor leadership changes. s.wg.Add(1) go s.monitorLeaderCh() // Start goroutine to check for instance expiry. s.wg.Add(1) go s.expirer() return nil }
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// Open starts the raft consensus and opens the store.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L143-L228
train
flynn/flynn
discoverd/server/store.go
Close
func (s *Store) Close() (lastIdx uint64, err error) { // Notify goroutines of closing and wait until they finish. close(s.closing) s.wg.Wait() s.mu.Lock() defer s.mu.Unlock() for _, l := range s.subscribers { for el := l.Front(); el != nil; el = el.Next() { go el.Value.(*subscription).Close() } } if s.raft != nil { s.raft.Shutdown().Error() lastIdx = s.raft.LastIndex() s.raft = nil } if s.transport != nil { s.transport.Close() s.transport = nil } if s.stableStore != nil { s.stableStore.Close() s.stableStore = nil } return lastIdx, nil }
go
func (s *Store) Close() (lastIdx uint64, err error) { // Notify goroutines of closing and wait until they finish. close(s.closing) s.wg.Wait() s.mu.Lock() defer s.mu.Unlock() for _, l := range s.subscribers { for el := l.Front(); el != nil; el = el.Next() { go el.Value.(*subscription).Close() } } if s.raft != nil { s.raft.Shutdown().Error() lastIdx = s.raft.LastIndex() s.raft = nil } if s.transport != nil { s.transport.Close() s.transport = nil } if s.stableStore != nil { s.stableStore.Close() s.stableStore = nil } return lastIdx, nil }
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// Close shuts down the transport and store.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L244-L271
train
flynn/flynn
discoverd/server/store.go
Leader
func (s *Store) Leader() string { if s.raft == nil { return "" } return s.raft.Leader() }
go
func (s *Store) Leader() string { if s.raft == nil { return "" } return s.raft.Leader() }
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// Leader returns the host of the current leader. Returns empty string if there is no leader. // Panic if called before store is opened.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L275-L280
train
flynn/flynn
discoverd/server/store.go
monitorLeaderCh
func (s *Store) monitorLeaderCh() { defer s.wg.Done() incoming := s.raft.LeaderCh() for { select { case <-s.closing: return case isLeader, ok := <-incoming: // Update leader time and clear heartbeats. s.mu.Lock() if isLeader { s.leaderTime = time.Now() } else { s.leaderTime = time.Time{} } s.heartbeats = make(map[instanceKey]time.Time) s.mu.Unlock() // If the incoming channel closed then close our leader channel. if !ok { close(s.leaderCh) return } // Resend value to store's leader channel. select { case s.leaderCh <- isLeader: default: } } } }
go
func (s *Store) monitorLeaderCh() { defer s.wg.Done() incoming := s.raft.LeaderCh() for { select { case <-s.closing: return case isLeader, ok := <-incoming: // Update leader time and clear heartbeats. s.mu.Lock() if isLeader { s.leaderTime = time.Now() } else { s.leaderTime = time.Time{} } s.heartbeats = make(map[instanceKey]time.Time) s.mu.Unlock() // If the incoming channel closed then close our leader channel. if !ok { close(s.leaderCh) return } // Resend value to store's leader channel. select { case s.leaderCh <- isLeader: default: } } } }
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// monitors the raft leader channel, updates the leader time, and resends to a local channel.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L283-L315
train
flynn/flynn
discoverd/server/store.go
LeaderCh
func (s *Store) LeaderCh() <-chan bool { if s.raft == nil { ch := make(chan bool, 1) ch <- true return ch } return s.leaderCh }
go
func (s *Store) LeaderCh() <-chan bool { if s.raft == nil { ch := make(chan bool, 1) ch <- true return ch } return s.leaderCh }
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// LeaderCh returns a channel that signals leadership change. // Panic if called before store is opened.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L319-L326
train
flynn/flynn
discoverd/server/store.go
AddPeer
func (s *Store) AddPeer(peer string) error { err := s.raft.AddPeer(peer).Error() if err == raft.ErrNotLeader { err = ErrNotLeader } else if err == raft.ErrKnownPeer { return nil } return err }
go
func (s *Store) AddPeer(peer string) error { err := s.raft.AddPeer(peer).Error() if err == raft.ErrNotLeader { err = ErrNotLeader } else if err == raft.ErrKnownPeer { return nil } return err }
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// AddPeer adds a peer to the raft cluster. Panic if store is not open yet.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L332-L340
train
flynn/flynn
discoverd/server/store.go
RemovePeer
func (s *Store) RemovePeer(peer string) error { err := s.raft.RemovePeer(peer).Error() if err == raft.ErrNotLeader { err = ErrNotLeader } else if err == raft.ErrUnknownPeer { return nil } return err }
go
func (s *Store) RemovePeer(peer string) error { err := s.raft.RemovePeer(peer).Error() if err == raft.ErrNotLeader { err = ErrNotLeader } else if err == raft.ErrUnknownPeer { return nil } return err }
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// RemovePeer removes a peer from the raft cluster. Panic if store is not open yet.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L343-L351
train
flynn/flynn
discoverd/server/store.go
SetPeers
func (s *Store) SetPeers(peers []string) error { return s.raft.SetPeers(peers).Error() }
go
func (s *Store) SetPeers(peers []string) error { return s.raft.SetPeers(peers).Error() }
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// SetPeers sets a list of peers in the raft cluster. Panic if store is not open yet.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L359-L361
train
flynn/flynn
discoverd/server/store.go
ServiceNames
func (s *Store) ServiceNames() []string { s.mu.RLock() defer s.mu.RUnlock() var a []string for name := range s.data.Services { a = append(a, name) } sort.Strings(a) return a }
go
func (s *Store) ServiceNames() []string { s.mu.RLock() defer s.mu.RUnlock() var a []string for name := range s.data.Services { a = append(a, name) } sort.Strings(a) return a }
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// ServiceNames returns a sorted list of existing service names.
[ "ServiceNames", "returns", "a", "sorted", "list", "of", "existing", "service", "names", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L364-L375
train
flynn/flynn
discoverd/server/store.go
AddService
func (s *Store) AddService(service string, config *discoverd.ServiceConfig) error { if config == nil { config = DefaultServiceConfig } // Serialize command. cmd, err := json.Marshal(&addServiceCommand{ Service: service, Config: config, }) if err != nil { return err } if _, err := s.raftApply(addServiceCommandType, cmd); err != nil { return err } return err }
go
func (s *Store) AddService(service string, config *discoverd.ServiceConfig) error { if config == nil { config = DefaultServiceConfig } // Serialize command. cmd, err := json.Marshal(&addServiceCommand{ Service: service, Config: config, }) if err != nil { return err } if _, err := s.raftApply(addServiceCommandType, cmd); err != nil { return err } return err }
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// AddService creates a service with a configuration. // Returns an error if the service already exists.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L379-L397
train
flynn/flynn
discoverd/server/store.go
Config
func (s *Store) Config(service string) *discoverd.ServiceConfig { s.mu.RLock() defer s.mu.RUnlock() return s.data.Services[service] }
go
func (s *Store) Config(service string) *discoverd.ServiceConfig { s.mu.RLock() defer s.mu.RUnlock() return s.data.Services[service] }
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// Config returns the configuration for service.
[ "Config", "returns", "the", "configuration", "for", "service", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L417-L421
train
flynn/flynn
discoverd/server/store.go
RemoveService
func (s *Store) RemoveService(service string) error { // Serialize command. cmd, err := json.Marshal(&removeServiceCommand{Service: service}) if err != nil { return err } if _, err := s.raftApply(removeServiceCommandType, cmd); err != nil { return err } return nil }
go
func (s *Store) RemoveService(service string) error { // Serialize command. cmd, err := json.Marshal(&removeServiceCommand{Service: service}) if err != nil { return err } if _, err := s.raftApply(removeServiceCommandType, cmd); err != nil { return err } return nil }
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// RemoveService deletes the service from the store.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L424-L435
train
flynn/flynn
discoverd/server/store.go
Instances
func (s *Store) Instances(service string) ([]*discoverd.Instance, error) { s.mu.Lock() defer s.mu.Unlock() return s.instances(service), nil }
go
func (s *Store) Instances(service string) ([]*discoverd.Instance, error) { s.mu.Lock() defer s.mu.Unlock() return s.instances(service), nil }
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// Instances returns a list of instances for service.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L467-L471
train
flynn/flynn
discoverd/server/store.go
ServiceMeta
func (s *Store) ServiceMeta(service string) *discoverd.ServiceMeta { s.mu.Lock() defer s.mu.Unlock() return s.serviceMeta(service) }
go
func (s *Store) ServiceMeta(service string) *discoverd.ServiceMeta { s.mu.Lock() defer s.mu.Unlock() return s.serviceMeta(service) }
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// ServiceMeta returns the meta data for a service.
[ "ServiceMeta", "returns", "the", "meta", "data", "for", "a", "service", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L620-L624
train
flynn/flynn
discoverd/server/store.go
SetServiceLeader
func (s *Store) SetServiceLeader(service, id string) error { // Serialize command. cmd, err := json.Marshal(&setLeaderCommand{ Service: service, ID: id, }) if err != nil { return err } if _, err := s.raftApply(setLeaderCommandType, cmd); err != nil { return err } return nil }
go
func (s *Store) SetServiceLeader(service, id string) error { // Serialize command. cmd, err := json.Marshal(&setLeaderCommand{ Service: service, ID: id, }) if err != nil { return err } if _, err := s.raftApply(setLeaderCommandType, cmd); err != nil { return err } return nil }
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// SetServiceLeader manually sets the leader for a service.
[ "SetServiceLeader", "manually", "sets", "the", "leader", "for", "a", "service", "." ]
b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L709-L723
train
flynn/flynn
discoverd/server/store.go
invalidateServiceLeader
func (s *Store) invalidateServiceLeader(service string) { // Retrieve service config. c := s.data.Services[service] // Ignore if there is no config or the leader is manually elected. if c == nil || c.LeaderType == discoverd.LeaderTypeManual { return } // Retrieve current leader ID. prevLeaderID := s.data.Leaders[service] // Find the oldest, non-expired instance. var leader *discoverd.Instance for _, inst := range s.data.Instances[service] { if leader == nil || inst.Index < leader.Index { leader = inst } } // Retrieve the leader ID. var leaderID string if leader != nil { leaderID = leader.ID } // Set leader. s.data.Leaders[service] = leaderID // Broadcast event. if prevLeaderID != leaderID { var inst *discoverd.Instance if s.data.Instances[service] != nil { inst = s.data.Instances[service][leaderID] } s.broadcast(&discoverd.Event{ Service: service, Kind: discoverd.EventKindLeader, Instance: inst, }) } }
go
func (s *Store) invalidateServiceLeader(service string) { // Retrieve service config. c := s.data.Services[service] // Ignore if there is no config or the leader is manually elected. if c == nil || c.LeaderType == discoverd.LeaderTypeManual { return } // Retrieve current leader ID. prevLeaderID := s.data.Leaders[service] // Find the oldest, non-expired instance. var leader *discoverd.Instance for _, inst := range s.data.Instances[service] { if leader == nil || inst.Index < leader.Index { leader = inst } } // Retrieve the leader ID. var leaderID string if leader != nil { leaderID = leader.ID } // Set leader. s.data.Leaders[service] = leaderID // Broadcast event. if prevLeaderID != leaderID { var inst *discoverd.Instance if s.data.Instances[service] != nil { inst = s.data.Instances[service][leaderID] } s.broadcast(&discoverd.Event{ Service: service, Kind: discoverd.EventKindLeader, Instance: inst, }) } }
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// invalidateServiceLeader updates the current leader of service.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L769-L811
train
flynn/flynn
discoverd/server/store.go
expirer
func (s *Store) expirer() { defer s.wg.Done() ticker := time.NewTicker(s.ExpiryCheckInterval) defer ticker.Stop() for { // Wait for next check or for close signal. select { case <-s.closing: return case <-ticker.C: } // Check all instances for expiration. if err := s.EnforceExpiry(); err != nil && err != raft.ErrNotLeader { s.logger.Printf("enforce expiry: %s", err) } } }
go
func (s *Store) expirer() { defer s.wg.Done() ticker := time.NewTicker(s.ExpiryCheckInterval) defer ticker.Stop() for { // Wait for next check or for close signal. select { case <-s.closing: return case <-ticker.C: } // Check all instances for expiration. if err := s.EnforceExpiry(); err != nil && err != raft.ErrNotLeader { s.logger.Printf("enforce expiry: %s", err) } } }
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// expirer runs in a separate goroutine and checks for instance expiration.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L814-L833
train
flynn/flynn
discoverd/server/store.go
EnforceExpiry
func (s *Store) EnforceExpiry() error { var cmd []byte if err := func() error { s.mu.Lock() defer s.mu.Unlock() // Ignore if this store is not the leader and hasn't been for at least 2 TTLs intervals. if !s.IsLeader() { return raft.ErrNotLeader } else if s.leaderTime.IsZero() || time.Since(s.leaderTime) < (2*s.InstanceTTL) { return ErrLeaderWait } // Iterate over services and then instances. var instances []expireInstance for service, m := range s.data.Instances { for _, inst := range m { // Ignore instances that have heartbeated within the TTL. if t := s.heartbeats[instanceKey{service, inst.ID}]; time.Since(t) <= s.InstanceTTL { continue } logger.Info("marking instance for expiry", "fn", "EnforceExpiry", "service", service, "instance.id", inst.ID, "instance.addr", inst.Addr, ) // Add to list of instances to expire. // The current expiry time is added to prevent a race condition of // instances updating their expiry date while this command is applying. instances = append(instances, expireInstance{ Service: service, InstanceID: inst.ID, }) } } // If we have no instances to expire then exit. if len(instances) == 0 { return nil } // Create command to expire instances. buf, err := json.Marshal(&expireInstancesCommand{ Instances: instances, }) if err != nil { return err } cmd = buf return nil }(); err != nil { return err } else if cmd == nil { return nil } // Apply command to raft. if _, err := s.raftApply(expireInstancesCommandType, cmd); err != nil { return err } return nil }
go
func (s *Store) EnforceExpiry() error { var cmd []byte if err := func() error { s.mu.Lock() defer s.mu.Unlock() // Ignore if this store is not the leader and hasn't been for at least 2 TTLs intervals. if !s.IsLeader() { return raft.ErrNotLeader } else if s.leaderTime.IsZero() || time.Since(s.leaderTime) < (2*s.InstanceTTL) { return ErrLeaderWait } // Iterate over services and then instances. var instances []expireInstance for service, m := range s.data.Instances { for _, inst := range m { // Ignore instances that have heartbeated within the TTL. if t := s.heartbeats[instanceKey{service, inst.ID}]; time.Since(t) <= s.InstanceTTL { continue } logger.Info("marking instance for expiry", "fn", "EnforceExpiry", "service", service, "instance.id", inst.ID, "instance.addr", inst.Addr, ) // Add to list of instances to expire. // The current expiry time is added to prevent a race condition of // instances updating their expiry date while this command is applying. instances = append(instances, expireInstance{ Service: service, InstanceID: inst.ID, }) } } // If we have no instances to expire then exit. if len(instances) == 0 { return nil } // Create command to expire instances. buf, err := json.Marshal(&expireInstancesCommand{ Instances: instances, }) if err != nil { return err } cmd = buf return nil }(); err != nil { return err } else if cmd == nil { return nil } // Apply command to raft. if _, err := s.raftApply(expireInstancesCommandType, cmd); err != nil { return err } return nil }
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// EnforceExpiry checks all instances for expiration and issues an expiration command, if necessary. // This function returns raft.ErrNotLeader if this store is not the current leader.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L837-L902
train
flynn/flynn
discoverd/server/store.go
raftApply
func (s *Store) raftApply(typ byte, cmd []byte) (uint64, error) { s.mu.RLock() if s.raft == nil { s.mu.RUnlock() return 0, ErrShutdown } s.mu.RUnlock() // Join the command type and data into one message. buf := append([]byte{typ}, cmd...) // Apply to raft and receive an ApplyFuture back. f := s.raft.Apply(buf, 30*time.Second) if err := f.Error(); err == raft.ErrNotLeader { return 0, ErrNotLeader // hide underlying implementation error } else if err != nil { return f.Index(), err } else if err, ok := f.Response().(error); ok { return f.Index(), err } return f.Index(), nil }
go
func (s *Store) raftApply(typ byte, cmd []byte) (uint64, error) { s.mu.RLock() if s.raft == nil { s.mu.RUnlock() return 0, ErrShutdown } s.mu.RUnlock() // Join the command type and data into one message. buf := append([]byte{typ}, cmd...) // Apply to raft and receive an ApplyFuture back. f := s.raft.Apply(buf, 30*time.Second) if err := f.Error(); err == raft.ErrNotLeader { return 0, ErrNotLeader // hide underlying implementation error } else if err != nil { return f.Index(), err } else if err, ok := f.Response().(error); ok { return f.Index(), err } return f.Index(), nil }
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// raftApply joins typ and cmd and applies it to raft. // This call blocks until the apply completes and returns the error.
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b4b05fce92da5fbc53b272362d87b994b88a3869
https://github.com/flynn/flynn/blob/b4b05fce92da5fbc53b272362d87b994b88a3869/discoverd/server/store.go#L949-L971
train