Multi-home Swarm Setup

[meyay (Metin Y.)]

I share your feeling about Portainer.

Regarding the cluster in home1, make sure have consider this constraint with your setup:

3 Docker Engines - Number of Managers in Swarm

With 3 nodes, I would aim for a manager only cluster. Docker uses the Raft consensus algorithm for quorum. To reach quorum you need to have floor(n/2)+1 nodes to be healthy. 1 master node can compensate no loss → cluster will be headless, 2 master nodes can compensate no loss → either one node unaivalable renders the cluster headless. 3 master nodes can compensate the loss of 1 master node, will be headless if 2 or more fail. 5 master nodes can compensate the loss of 2 master nodes, will be …

Docker Manager Quoram

Let me quote https://docs.docker.com/engine/swarm/admin_guide/ ### Maintain the quorum of managers If the swarm loses the quorum of managers, the swarm cannot perform management tasks. If your swarm has multiple managers, always have more than two. To maintain quorum, a majority of managers must be available. An odd number of managers is recommended, because the next even number does not make the quorum easier to keep. For instance, whether you have 3 or 4 managers, you can stil…