Docker Postgres Restic Backup

A sidecar docker container that backups a PostgreSQL database via restic to an S3-compatible storage.

The setup is surprisingly simple:

The docker image is based on alpine and executes the backup script daily via alpine's crond service.

Environment variables

• NOTIFY_URL: URL that will be sent a notification to, after the whole backup process ends

The following environment variables have a mutually exclusive *_FILE counterpart that can be set to a path to a Docker secret.

• PGHOST: PostgreSQL server host
• PGUSER: PostgreSQL user name
• PGPASSWORD: PostgreSQL user password
• PGDATABASE: PostgreSQL database to backup
• RESTIC_REPOSITORY: Restic repository name
• RESTIC_PASSWORD: Restic repository password
• AWS_ACCESS_KEY_ID: S3 Access ID
• AWS_SECRET_ACCESS_KEY: S3 Secret Key