Final answer:
To force a Docker Swarm that has lost majority by forcing a new swarm, use the command docker swarm init --force-new-cluster. This command will reset the swarm and create a new swarm with the current node as the leader.
Step-by-step explanation:
To force a Docker Swarm that has lost majority by forcing a new swarm, you can use the command docker swarm init --force-new-cluster. This command will reset the swarm, removing all the previous nodes, and create a new swarm with the current node as the leader.
By adding the --force-new-cluster flag, the command will force the creation of a new swarm even if it has lost the majority. This can be useful in cases where the majority of swarm nodes have failed or become unreachable.
It's important to note that when you force a new swarm, all existing services and tasks in the swarm will be lost. Therefore, it should be used with caution and only when necessary.