The other day I was running some containers on Amazon's ECS and logging to cloudwatch. I then learnt cloudwatch parses JSON logs so obviously I then wanted Sanic to log out JSON.
Ideally this'll be useful to people but if it isn't, raise an issue and we'll make it better :)
To install:
pip install sanic-json-logging
Look at examples/simple.py
for a full working example, but this will essentially get you going
import sanic
from sanic_json_logging import setup_json_logging
app = sanic.Sanic()
setup_json_logging(app)
setup_json_logging
does the following:
- changes the default log formatters to JSON ones
- also filters out no Keepalive warnings
- unless told otherwise, will change the asyncio task factory, to implement some rudimentary task-local storage.
- installs pre and post request middleware. Pre-request middleware to time tasks and generate a uuid4 request id. Post-request middleware to emit access logs.
- will use AWS X-Forwarded-For IPs in the access logs if present
If setup_json_logging
changed the task factory, all tasks created from the request's task will contain the request ID.
You can pass disable_json_access_log=True
to the setup function which will disable the configuration of JSON access logging.
Setting configure_task_local_storage
to false will disable storing request IDs inside the task object which will
Currently I have it outputting access logs like
{
"timestamp": "2018-06-09T17:42:52.195701Z",
"level": "INFO",
"method": "GET",
"path": "/endpoint1",
"remote": "127.0.0.1:33468",
"user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.62 Safari/537.36",
"host": "localhost:8000",
"response_time": 0.0,
"req_id": "795617c7-b514-4ed9-bb63-cc4fcd883c3d",
"logger": "sanic.access",
"status_code": 200,
"length": 0,
"type": "access"
}
And if you log to the root
logger, inside a request, it'll look like this.
{
"timestamp": "2018-06-09T17:42:52.195326Z",
"level": "INFO",
"message": "some informational message",
"type": "log",
"logger": "root",
"filename": "simple.py",
"lineno": 16,
"req_id": "795617c7-b514-4ed9-bb63-cc4fcd883c3d"
}
1.3.0 - Added Request ID to request dict, fixed move to travis.com
1.2.0 - Fixed UA header bug, fixed tests
1.1.1 - Pretty much first decent version