Some strange troubleshouting with docker since laste update.
Can you help me about this ? It’s is not my firstr upgrade of package and this case have been reproduice on a freshnew stack.
Updgraded from 18.09.9 to 19.03.12
OS : Ubuntu 16.04 Server
Docker package
docker-ce=5:18.09.9~3-0~ubuntu-bionic
docker-ce-cli=5:19.03.11~3-0~ubuntu-bionic
containerd.io=1.2.13-2
Details
A problem identified with version 19.03.12 of docker Managers have been put in version 19.03.12 When you want to add a manager to the group with an active leader, an error message is visible The different known solutions were used
Case
As soon as you play the docker swarm join --token command on non-leader managers, after a few minutes, the leader manager is no longer available -> Forced to replay the docker swarm init command --force-new-cluster --advertise-addr xx.xx.xx.xx --listen-addr xx.xx.xx.xx: 2377 to find the leader operational
The leader sees the worker nodes in version 19.03.12. No problem with workers
Restarting the docker service leads to the same result
Error Message
The swarm does not have a leader Error response from daemon: rpc error: code = Unknown desc = The swarm does not have a leader. It's possible that too few managers are online. Make sure more than half of the managers are online. docker msg="error reading the kernel parameter net.ipv4.vs.expire_nodest_conn"
Docker Node is Down after service restart
https://cynici.wordpress.com/2018/05/31/docker-info-rpc-error-on-manager-node/ https://gitmemory.com/issue/docker/swarmkit/2670/481951641 https://forums.docker.com/t/cant-add-third-swarm-manager-or-create-overlay-network-the-swarm-does-not-have-a-leader/50849 https://askubuntu.com/questions/935569/how-to-completely-uninstall-docker
