How to clear Docker task history

Question

When running docker in swarm mode, a history of past tasks accumulate as docker services are updated. Running docker node ps displays the log of tasks.

How do I clear this log without removing the service?

Answer 1

You can adjust the history limit in swarm by running:

docker swarm update --task-history-limit=1

Which will only keep one previous task instead of the default 5. See the cli docs for more details: https://docs.docker.com/engine/reference/commandline/swarm_update/

Answer 2

Instead this worked better to clear task history and show only the current running containers.

#docker swarm update --task-history-limit 0