This script is mostly an adaptation of the Rancher 2.x Backup manual, molded into a single script that can be automated further by you. It obviously won't fit everybody but so far it has done me good service to keep regular backups of my Rancher installations and moving them away with Borg and rclone later.

It will expects your current Rancher instance to run as rancher_server.


set -e
set -x

TIMESTAMP=$(date +%Y-%m-%d-%H%M%S)

docker stop rancher_server
docker create --volumes-from rancher_server \
       --name "${DATA_CONTAINER_NAME}" \
docker run --volumes-from "${DATA_CONTAINER_NAME}" \
       -v $PWD:/backup alpine tar zcvf \
       /backup/rancher-data-backup-$TIMESTAMP.tar.gz /var/lib/rancher
docker rm rancher_server
docker pull rancher/rancher:latest
docker run -d --volumes-from "${DATA_CONTAINER_NAME}" \
       --name rancher_server --restart=unless-stopped \
       -p 80:80 -p 443:443 \
       rancher/rancher:latest \
       --acme-domain "$DOMAIN"
docker logs -f rancher_server