Swarm Setup

Swarm Cluster setup includes client side docker-machine, swarm cluster launching. The following steps illustrate how to deploy them.

Prepare:

• Download Openstack RC file and name is locally as spectrum-openrc.sh. You can find the file on your own openstack web at Project/Compute/Access & Security.

Steps:

• Install docker machine client

  Follow docker-machine link.

• Create a swarm token and record it(say $swarm_id)

  docker run swarm create

• Launch VM's to swarm cluster(replace ${TOKEN} with $swarm_id above and ${USER} and ${passwd} with your own login credentials to the private docker registry)

  ./add_new_agent.sh

  It might ask for arguments like master/agent, agent names etc.

• Set up environment to talk to the swarm master

  append the following line in .bashrc

  eval $(docker-machine env --swarm swarm-master)

FAQ

1. swarm master doesn't discover new nodes even if the remote discover server list it.

   Check if the remote server has the new node config(replace $swarm_id with your own)

   sudo docker run --rm swarm list token://$swarm_id

   restart swarm master(replace $swarm_id with your own)

   sudo docker kill swarm-agent-master

   docker run -t -p 3376:3376 -v /etc/docker:/etc/docker --name="swarm-agent-master" -t swarm manage --tlsverify --tlscacert=/etc/docker/ca.pem --tlscert=/etc/docker/server.pem --tlskey=/etc/docker/server-key.pem -H tcp://0.0.0.0:3376 --strategy spread token://$swarm_id