simple backup/upgrade rancher

rancher-upgrade

#!/bin/bash

CONTAINERNAME=rancher-server
NEWVERSION=v2.2.0
CURRENTVERSION=`docker inspect ${CONTAINERNAME} | jq --raw-output '.[]."Config"."Image"' | awk -F ':' '{print $2}'`
DATE=`date +%Y-%m-%d-%H-%M-%S`

function version_gt() { test "$(printf '%s\n' "$@" | sort -V | head -n 1)" != "$1"; }

if ! version_gt $NEWVERSION $CURRENTVERSION; then
  echo "No upgrade necessary to ${NEWVERSION}, current version is ${CURRENTVERSION}"
  exit
fi

echo Upgrading ${CONTAINERNAME} from ${CURRENTVERSION} to ${NEWVERSION}

docker pull rancher/rancher:$NEWVERSION

# STOP container
docker stop $CONTAINERNAME && docker container rename $CONTAINERNAME $CONTAINERNAME-$CURRENTVERSION-$DATE

# BACKUP
docker run  --volumes-from rancher-data -v $PWD:/backup alpine tar zcvf /backup/rancher-data-backup-$CURRENTVERSION-$DATE.tar.gz /var/lib/rancher

# RUN new version
docker run -d --volumes-from rancher-data --restart=unless-stopped -p 80:80 -p 443:443 --name $CONTAINERNAME rancher/rancher:$NEWVERSION