Crontab with maintainence tasks for self-managed GitLab instance (docker setup)

crontab

# Crontab for Self-Managed GitLab instance
# ----------------------------------------
# Edit with (sudo) crontab -e

## mail errors to email
MAILTO=email@domain.de

## prune unused image to reduce space
@daily docker image prune -f > /dev/null

## daily gitlab backup at night (app & config/secrets)
0 2 * * * docker exec -t gitlab_web_1 gitlab-backup create > /dev/null
0 3 * * * docker exec -t gitlab_web_1 gitlab-ctl backup-etc --delete-old-backups > /dev/null

## upload backup to backup server
0 4 * * * cd /home/htects/gitlab && ./upload_backups.sh > /dev/null

## remove unused docker layers in GitLab (every sunday)
30 4 * * 0 docker exec -t gitlab_web_1 gitlab-ctl registry-garbage-collect -m