Docker swarm cheat sheet

#Introduction

In this tutorial, I will study the Docker swarm cheat sheet. How to Management swarm and Handling nodes use CLI commands.

Now, The Docker swarm cheat sheet

Docker swarm Management

Set up master

docker swarm init --advertise-addr <ip>

How to Force manager on broken cluster

docker swarm init --force-new-cluster -advertise-addr <ip>

Enable auto-lock

docker swarm init –autolock

Get token to join workers

docker swarm join-token worker

Get a token to join the new manager

docker swarm join-token manager

Join host as a worker

docker swarm join <server> worker

Have a node leave a swarm

docker swarm leave

Unlock a manager host after docker

docker swarm unlock

Print key needed for ‘unlock’

docker swarm unlock-key

Print swarm node list

docker node ls

List the services running in a swarm

docker service ls

List the tasks of the service_name

docker service ps service_name

list running (active) tasks for a given service

docker service ps --filter desired-state=running <service id|name>

print console log of a service

docker service logs --follow <service id|name>

Promote a worker node to the manager

docker node promote node_name

The output terminal Promote a worker node to the manager as below

vagrant@controller:~$ docker node ls
ID                            HOSTNAME     STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION
9b2211c8l1bmhu3h2ij3kthxv *   controller   Ready     Active         Leader           20.10.14
0j0pslqf4g6xkki8ajydvc123     node1        Ready     Active                          20.10.14
f4cxubqg0wqdxsaj8pe4qsqlg     node2        Ready     Active                          20.10.14

vagrant@controller:~$ docker node promote f4cxubqg0wqdxsaj8pe4qsqlg
Node f4cxubqg0wqdxsaj8pe4qsqlg promoted to a manager in the swarm.

vagrant@controller:~$ docker node ls
ID                            HOSTNAME     STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION
9b2211c8l1bmhu3h2ij3kthxv *   controller   Ready     Active         Leader           20.10.14
0j0pslqf4g6xkki8ajydvc123     node1        Ready     Active                          20.10.14
f4cxubqg0wqdxsaj8pe4qsqlg     node2        Ready     Active         Reachable        20.10.14

List running swarms

docker stack ls

Updating later …

Conclusion

You have noted the Docker swarm cheat sheet. I hope will this your helpful. Thank you for reading the DevopsRoles page!