File size: 2,628 Bytes
c6cb4e0 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | Fix the following issue:
EODataAccessGateway constructor fails on AWS Lambda
**Describe the bug**
`makedirs` [invocation](https://github.com/CS-SI/eodag/blob/develop/eodag/api/core.py#L98) within the EODataAccessGateway constructor causes `OSError: [Errno 30] Read-only file system` when run on AWS Lambda
**Code To Reproduce**
CLI commands or Python code snippet to reproduce the bug. Please use maximum verbosity using:
```py
from aws_lambda_powertools.logging import Logger
from aws_lambda_powertools.tracing import Tracer
from eodag import EODataAccessGateway
logger = Logger()
tracer = Tracer()
@tracer.capture_lambda_handler
@logger.inject_lambda_context
def lambda_handler(event, context):
EODataAccessGateway()
```
**Output**
Compete output obtained with maximal verbosity.
```
[ERROR] OSError: [Errno 30] Read-only file system: '/home/sbx_user1051'
Traceback (most recent call last):
File "/opt/python/aws_lambda_powertools/tracing/tracer.py", line 305, in decorate
response = lambda_handler(event, context, **kwargs)
File "/opt/python/aws_lambda_powertools/logging/logger.py", line 438, in decorate
return lambda_handler(event, context, *args, **kwargs)
File "/var/task/<my file, my line>, in lambda_handler
EODataAccessGateway()
File "/opt/python/eodag/api/core.py", line 91, in __init__
makedirs(self.conf_dir)
File "/opt/python/eodag/utils/__init__.py", line 496, in makedirs
os.makedirs(dirpath)
File "/var/lang/lib/python3.9/os.py", line 215, in makedirs
makedirs(head, exist_ok=exist_ok)
File "/var/lang/lib/python3.9/os.py", line 215, in makedirs
makedirs(head, exist_ok=exist_ok)
File "/var/lang/lib/python3.9/os.py", line 225, in makedirs
mkdir(name, mode)
```
**Environment:**
- Python version: 3.9
- EODAG version: 2.5.2
- Runtime: AWS Lambda
**Additional context**
File system on AWS Lambda is read-only. It has "ephemeral storage" that could be accessed in `/tmp` ([1](https://aws.amazon.com/blogs/aws/aws-lambda-now-supports-up-to-10-gb-ephemeral-storage/), [2](https://aws.amazon.com/blogs/aws/aws-lambda-now-supports-up-to-10-gb-ephemeral-storage/)), however this class does not accept any configuration to where to point to `makedirs`.
The workaround that heavily relies on the [current implementation](https://github.com/CS-SI/eodag/blob/develop/eodag/api/core.py#L97) is to change `$HOME` env var before invoking the constructor. But it is barely acceptable and extremely inconvenient, since this variable is used by many tools locally and in automated tools along the way. |