docker-restic-cron

Docker image for restic backup solution plus cron.

It adds the ability to schedule the backup operation running the desired restic command through standard cron lines.

Use cases:

• Schedule backups on a regular basis
• Schedule backup removals on a regular basis

Usage

Set up the CRON variable with a restic command. In this minimalistic example we will just display the restic version:

docker run \
  -e "CRON=* * * * * restic version" \
  kedu/docker-restic-cron

In one minute you should get something similar to:

restic 0.11.0 compiled with go1.15.6 on linux/amd64

In real use case scenarios you will map docker host directories to docker container, either because they will be source and/or destination of the bacups:

-v /path/docker/host/dir:/path/docker/container/dir

Examples

In this example we will setup a minio bucket and will schedule a task to backup the docker host /tmp directory on a daily basis at 3:33 am.

Requirements:

• A minio server
• Access key and secret access key for the minio server
• Password for the restic repository

1. Initialize the repo. To do we can use the regular restic/restic docker image

docker run \
  --rm \
  -ti \
  -e AWS_ACCESS_KEY_ID=my_access_key \
  -e AWS_SECRET_ACCESS_KEY=my_secret_access_key \
  -e RESTIC_PASSWORD=my_bucket_password \
  -e RESTIC_REPOSITORY=s3:https://minio.example.com/mybucket \
  restic/restic init

Expected output similar to:

created restic repository 300f7daf49 at s3:https://minio.example.com/mybucket

Please note that knowledge of your password is required to access
the repository. Losing your password means that your data is
irrecoverably lost.

2. Backup each minute the content of docker host /tmp to the recently created bucket, mybucket:

docker run \
  -e AWS_ACCESS_KEY_ID=my_access_key \
  -e AWS_SECRET_ACCESS_KEY=my_secret_access_key \
  -e RESTIC_PASSWORD=my_bucket_password \
  -e RESTIC_REPOSITORY=s3:https://minio.example.com/mybucket \
  -e "CRON=* * * * * restic --verbose backup /tmp" \
  -e TZ=Europe/Madrid \
  -v /tmp:/tmp \
  -d kedu/docker-restic-cron

Environment variables

CRON

Cron line to execute the command, that typically will include the restic binary. Remember to enclose it in double quotes if executed with docker run. Example:

-e "33 3 * * *  restic --verbose backup /tmp"

TZ

Optional variable to setup the docker container timezone. If not supplied it will take UTC. Example:

-e TZ=Europe/Madrid

Please check all restic specific environment variables