Hey @jenny, You can do the following in case you want to change the manager nodes availability
$ docker node update --availability drain node-1
When a manager node becomes unavailable or if you want to take a manager offline for maintenance, You can promote a worker node to the manager role.Similarly, you can demote a manager node to the worker role.
Regardless of your reason to promote or demote a node, you must always maintain a quorum of manager nodes in the swarm.
- To promote a node or set of nodes, run docker node promote from a manager node:
$ docker node promote node-3 node-2
Node node-3 promoted to a manager in the swarm.
Node node-2 promoted to a manager in the swarm.
- To demote a node or set of nodes, run docker node demote from a manager node:
$ docker node demote node-3 node-2
Manager node-3 demoted in the swarm.
Manager node-2 demoted in the swarm.