cron-jobs service stuck in restart loop

[cdrini]

Running docker container ls on ol-home0 reveals that the cron-jobs service is stuck in a restart loop. Note docker containers need their command to be long-running, so maybe the cron docker service is only starting the cron service, but not "hanging" on it?

[cclauss]

In #4387 we used command: cron -f to run cron in the foreground to make it a long-running process but perhaps we need to do more.

• https://stackoverflow.com/search?q=cron+jobs+in+docker+container
• https://medium.com/@jonbaldie/how-to-run-cron-jobs-inside-docker-containers-26964315b582
• https://ypereirareis.github.io/blog/2020/04/09/running-cron-jobs-docker-container-definitive-guide

[cdrini]

Hmm :/ Do the logs reveal anything useful?

[cclauss]

docker logs --tail=10 openlibrary_cron-jobs_1
cron: can't open or create /var/run/crond.pid: Permission denied
cron: can't open or create /var/run/crond.pid: Permission denied
...

[cclauss]

1. Try user: root in docker-compose.production.yml https://github.com/internetarchive/openlibrary/compare/cron-hack

COMPOSE_FILE="docker-compose.yml:docker-compose.production.yml" docker-compose up -d --no-deps cron-jobs
docker logs --tail=10 openlibrary_cron-jobs_1  # no output...