Rancher v2.x single node upgrade

upgrade.sh

#!/bin/bash

# based on 
# https://rancher.com/docs/rancher/v2.x/en/upgrades/upgrades/single-node-upgrade/

RANCHER_CONTAINER_NAME=$1
RANCHER_CONTAINER_TAG=$2
RANCHER_VERSION=$3
RANCHER_UPGRADE_VERSION=$4

if [ "$#" -ne 4 ]; then
  echo "Usage: $0 <RANCHER_CONTAINER_NAME> <RANCHER_CONTAINER_TAG> <RANCHER_VERSION> <RANCHER_UPGRADE_VERSION>" >&2
  exit 1
fi

docker stop $RANCHER_CONTAINER_NAME
docker create --volumes-from $RANCHER_CONTAINER_NAME --name rancher-data rancher/rancher:$RANCHER_CONTAINER_TAG
# Improve this script by checking if the archive exists or using a date stamp with time included
# if it does then warn the user
# The way it's written, you can only create the backup 1x per day or you'll clobber the prior backup
docker run  --volumes-from rancher-data -v $PWD:/backup alpine tar zcvf /backup/rancher-data-backup-$RANCHER_VERSION-$(date '+%F').tar.gz /var/lib/rancher
docker pull rancher/rancher:$RANCHER_UPGRADE_VERSION
docker run -d --volumes-from rancher-data --restart=unless-stopped -p 80:80 -p 443:443 rancher/rancher:$RANCHER_UPGRADE_VERSION

Exactly what I need!