previously in run_app_paas.sh, we captured stdout from the app and
piped that into the log file. However, this came up with a bunch of
problems, mainly:
* exceptions with stack traces often weren't formatted properly,
and kibana could not parse them
* celery logs were duplicated - we'd collect both the json logs and
the human readable stdout logs.
instead, with the updated utils library, we can use that to log json
straight to the appropriate directory directly.
Stopping celery via upstart issues a TERM signal to the whole process group, which immediately kills the worker threads. This can lead to inconsistentcy in the state of a notification as an API call, for example, can take several seconds consequently the likelihood of the call being lost due to a restart is relatively high.
We need to ensure that we stop cleanly to ensure code deploys and autoscale events do not cause issues.
this script is called as part of a pre-stop hook in upstart, which passes a pid file location to the script. The script will then issues the TERM signal to only the master celery process. which will cleanly shut down the workers and exit.
the script will loop based on the existence of a /proc/{pid} for the celery master process. Once the file is gone the script will exit. Upstart blocks on this script before issuing kill on whatever processes may be left hanging around.
the length of the loop is a maximum 15 minutes - which is the tested max time a task may take. In reality it will exit much quicker.
PEP8 was renamed to pycodestyle; this issue explains why:
https://github.com/PyCQA/pycodestyle/issues/466
This commit changes our tests to use pycodestyle instead of pep8.
It also means:
- making a couple of whitespace changes to appease the linter
- disabling warnings for bare `Except`s (ie `Except` instead of `Except
ValueError`) – this seems like a sensible thing to catch but I’m not
going to make meaningful code changes in this commit
call generate-version-file before tests, since they'll fall over if the version file isn't present
use /Users/leohemsted/.virtualenvs/api rather than looking for ./venv/ - if there's some other venv already active, then don't try and look for a current venv to activate
Adapted to look up instance name from instance Tags
Allows app to choose correct ELB to de/register with
Delivery apps exit with code 0 earlier in the process
