Vagrant setup for 2-node Docker Swarm cluster on Ubuntu.
This Vagrant setup creates two Ubuntu VMs and then uses Ansible to install an NFS server and Docker Swarm manager on VM #1. It sets up NFS clients on the other VMs, Docker and uses "docker swarm join" to add the other VMs the the Docker Swarm managed by VM #1.
You'll need Git, Vagrant and a machine with a fair amount of memory. If you're reading this you probably have Git installed. You can get Vagrant here: https://www.vagrantup.com/downloads.html
Use Git to clone this repo:
$ git clone https://github.com/snoopdave/vagrant-ubuntu-swarm.git
Change directory in to the repo directory:
$ cd vagrant-ubuntu-swarm
Use Vagrant to create the cluster:
$ vagrant up
Vagrant will create two VMs running Ubuntu and will then use Ansible to install Docker on each. Ansible will init a Docker Swarm cluster on vm1, making it the Swarm master, and save the join-token to NFS drive. The other VMs will use that join-token to join the cluster.
You can use Vagrant to ssh into the two VMs of the cluster: vm1, vm2 and vm3. vm1 is the Docker Swarm master. For example, you can login to vm1 and list the Docker networks:
$ docker network ls
NETWORK ID NAME DRIVER SCOPE
4e6647e451f5 bridge bridge local
5417aa6b23a9 docker_gwbridge bridge local
98592e66496b host host local
2db972t4ugnd ingress overlay swarm
4838d2ef79d3 none null local
You can also access the cluster via IP addresses:
- vm1 is 10.1.1.161
- vm2 is 10.1.1.162
The cluster also exposes 8080 on each VM as port 80. So, for example if you run Tomcat on vm1 on port 8080, you'll be able to access Tomcat at http://10.1.1.161:8080 on your host computer.
You can change or add additional port mappings by changing the Vagrantfile.
vm1 runs an NFS server and shares /var/nfs with the other instances,
which mount the drive at the same path.