Backup
cd /var/lib/docker/
tar -zcvf swarm.tar.gz swarm/
docker node ls
Delete the docker swarm folder
rm -ifr swarm
systemctl stop docker
systemctl start docker
docker node ls
By this time you will not be able to access the cluster because swarm folder is deleted
Restore
systemctl stop docker
rm -fr swarm
tar -xvzf swarm.tar.gz
systemctl start docker
docker node ls
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