No crontab for root about ansible-docker HOT 7 CLOSED

Hi,

The cron job is written out to disk at a specific path instead of being accessible with crontab -l.

Check out /etc/cron.d/ on your server. You should see the cron job(s) there.

from ansible-docker.

Indeed it's there, thanks!

from ansible-docker.

No problem. The reason for that stemmed from this issue: #35

from ansible-docker.

The cron job is written out to disk at a specific path instead of being accessible with crontab -l.

I´d love to understand this. why to write it directly instead of doing it via Crontab? how do you manage it? what is the logic behind all this?

from ansible-docker.

It's more straight forward to be able to see a list of cron jobs on your system by going to a centralized place on your file system (/etc/cron.d) than wondering which cron jobs exist in each user's crontab -l. You can still run cron jobs as a non-root user with the /etc/cron.d approach since one of the arguments of the cron job is picking which user it runs as.

From an automation standpoint it's also easier to only have to think about adding and removing files in a directory instead of parsing a crontab file from 1 or more user accounts.

from ansible-docker.

So if i understood correctly by just dropping files into /etc.d/daily, weekly, monthly scripts will be executed. How do you specify the user and the time?

I'm still a bit confused

from ansible-docker.

Yes, they just need to exist in any of those directories and cron picks it up automatically. You don't need to restart anything.

My role does this by default:

docker__cron_jobs_prune_flags: "af"
docker__cron_jobs_prune_schedule: ["0", "0", "*", "*", "0"]
docker__cron_jobs:
  - name: "Docker disk clean up"
    job: "docker system prune -{{ docker__cron_jobs_prune_flags }} > /dev/null 2>&1"
    schedule: "{{ docker__cron_jobs_prune_schedule }}"
    cron_file: "docker-disk-clean-up"
    user: "{{ (docker__users | first) | d('root') }}"

You can override those variables as needed if you want to change things.

By default it runs the cron job every Sunday at midnight, that's what ["0", "0", "*", "*", "0"] is, you can verify it here: https://crontab.guru/#0_0_*_*_0

from ansible-docker.