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Backupbot II: This Time It's Easily Configurable

Automatically backup files from running Docker Swarm services based on labels.

Background

There are lots of Docker volume backup systems; all of them have one or both of these problems:

You need to define all the volumes to back up in the configuration system
Backups require services to be stopped to take consistent copies

TODO

Make a Docker image of this
Rip out or improve Restic stuff
Add secret handling for database backups
Continuous linting with shellcheck

Label format

(Haven't done secrets yet, here are two options)

services:
  db:
    deploy:
      labels:
        backupbot.backup: "true"
        backupbot.backup.repos: "$some_thing"
        backupbot.backup.at: "* * * * *"
        backupbot.backup.pre-hook: 'mysqldump -u root -p"$(cat /run/secrets/db_root_password)" -f /tmp/dump/dump.db'
        backupbot.backup.post-hook: "rm -rf /tmp/dump/dump.db"
        backupbot.backup.path: "/tmp/dump/"

Questions:

Should frequency be configurable per service, centrally, or both?

- "backupbot.backup.at: "* * * * *"