community-catalog/infra-templates/swarm

Prerequisites

• Port 2377 and 2378 must be open
• Docker v1.12.1 installed

SwarmKit's overlay network configuration must determine which interface will be used for cross-host communication. By default, Rancher routes traffic over public IP addresses. Swarm can't always detect the corresponding interface; you may need to do one of the following:

• Register hosts with CATTLE_AGENT_IP environment variable set to a system address
• Specify the host interface for Swarm to listen on (hosts must have the same interface name)

Features

• Automatically scale up/down a Swarm by adding/removing hosts to an environment
  • Do not attempt to run docker swarm commands manually
• Configurable number of managers tunable to desired failure tolerance
• Reconciliation logic promotes/demotes managers/workers to maintain resilience

Limitations

• Swarm over public networks is not supported in Docker 1.12.3 and older