Issue with "tasks" logs on a Proxmox Backup Server

On a PBS server, the root filesystem can periodically fill up due to the lack of log rotation in the directory:

/var/log/proxmox-backup/tasks/

Because of this, I decided to add a simple scheduled cleanup command to remove files older than 31 days.

Interestingly, the server does not have the crontab -e command available:

# crontab -e
bash: crontab: command not found

I didn’t want to search for or install additional packages just to enable this command, so I created a script here:

/etc/cron.daily/clean-pbs-log-tasks

Script contents:

# find and clean /var/log/proxmox-backup/tasks/* older than 31 day
## initial PBS task logs have no rotation, so the root directory can become full
cd /var/log/proxmox-backup/ && /usr/bin/find ./tasks/* -mtime +31 -type f -delete

Done!

You can check the total size of the tasks directory with:

du -h --max-depth=1 /var/log/proxmox-backup/