[docker-CLI] backup the jenkins_home volume for Jenkins service in docker swarm

backup-jenkins-home.sh

#!/bin/bash

bkupdir="<your backup folder>/bkup_`date +%Y%m%d_%H%M%S`"
log="$bkupdir/backup.log"

mkdir -p $bkupdir

echo "backup folder : $bkupdir"

echo "Start time    : `date`" >> $log
echo "backup folder : $bkupdir" >> $log

ctrId=`docker ps -q --filter "label=com.docker.swarm.service.name=<your jenkins service name>" --filter "status=running"`

docker run --rm -it \
  --volumes-from $ctrId \
  -v $bkupdir:/bkup \
  ubuntu \
  tar -cf /bkup/jenkins_home.tar -C /var/jenkins_home secrets

echo "End date      : `date`" >> $log