How to change node availability in docker swarm

Question

Hi Guys,

I have added one master node in the Docker swarm. I want to drain a manager node so that it only performs swarm management tasks and is unavailable for task assignment. How to do that?

Answer 1

Hi@akhtar,

You can change the node availability according to your need. You can perform the below operations.

• drain a manager node so that only performs swarm management tasks and is unavailable for task assignment.

• drain a node so you can take it down for maintenance.

• pause a node so it can’t receive new tasks.

• restore unavailable or paused nodes available status.

For example, to change a manager node to Drain availability.

$ docker node update --availability drain node-1
node-1