Simple script to set up a Docker 1.12 swarm for local testing. The nodes are provisioned using docker-machine with the virtualbox driver.
There is no difference between nodes other than the naming convention we use to distinguish between managers and workers. In production, however, you might choose to use higher capacity instances (cpu+memory) for managers.
- Docker v1.12
- Docker Machine v0.8.0
For Mac and Windows, use Docker for Mac and Docker for Windows respectively. For Ubuntu, see:
https://docs.docker.com/engine/installation/linux/ubuntulinux/ https://github.com/docker/machine/releases/
My gist may help, but you need to update for the correct version of ubuntu you're running (ex, ubuntu-wily) and update the docker-machine version from v0.7.0 to v0.8.0`.
Update the script to set the number of managers and workers you want to use. For managers, you always want to use 1, 3, or 5. For virtualbox on localhost, 3 should is enough if you're evaluating HA, otherwise just use 1.
In this example, the bootstrap script was configured with MANAGERS=1 AND WORKERS=2.
List nodes
$ docker $(m config m1) node ls
Start a sample service
$ docker $(docker-machine config m1) service create --replicas 3 --name pinger alpine ping docker.com
5lxnahrd0895hxj181e9oxdsn
List the service
$ docker $(docker-machine config m1) service ls
ID NAME REPLICAS IMAGE COMMAND
5lxnahrd0895 pinger 3/3 alpine ping docker.com
List the service tasks (corresponds to containers)
$ docker $(docker-machine config m1) service ps pinger
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR
3g0qenvnnu6szwbhbvwevt9n4 pinger.1 alpine m1 Running Running 51 seconds ago
1y3t534iszzc0ln691k7pax22 pinger.2 alpine w1 Running Running 51 seconds ago
d3tc9i8h83ws5qwo4y3rprhx4 pinger.3 alpine w2 Running Running 51 seconds ago