Ansible Docker Swarm

Configures a Docker Swarm cluster.

Requirements

• docker installed on hosts

Role Variables

# Port docker swarm will communicate on
docker_swarm_port: 2377

# Network interface to use
docker_swarm_network_interface: "eth0"

Usage

When starting a docker swarm the following ports must be open:

• 2377/tcp (docker_swarm_port)
• 7946/tcp
• 7946/udp
• 4789/udp
• 50/esp

This information can be found on docker's documentation.

Docker Manager and Workers

This role configures hosts in group docker_swarm_manager to be manager nodes and hosts in group docker_swarm_worker to be worker nodes:

[docker_swarm_manager]
server1
server2

[docker_swarm_worker]
server3
server4

Docker Swarm Labels

Swarm labels can be added to nodes by setting the docker_swarm_label to a list of strings:

...
[docker_swarm_manager]
server1 docker_swarm_labels="{'db':'true'}"
server2 docker_swarm_labels="{'dog':'big'}"

[docker_swarm_worker]
server3 docker_swarm_labels="{'docker':'17.12', 'type':'queue'}"
server4
...

License

MIT