3 nodes cluster, node image based on ubuntu-xenial-docker

With docker running on each node, this virtual cluster can support multiple distributed software configuration at ease.

Hosts:

1. node1: 192.168.33.21
2. node2: 192.168.33.22
3. node3: 192.168.33.23

All machines are connected by a host-only network.

To download base image directly:

refernece

Example, the one used in this Vagrant project:

Download URL

To manage metadata for downloaded box files:

reference

Example:

{
  "name": "envimation/ubuntu-xenial-docker",
  "description": "This box contains Ubuntu 16.04 LTS 64-bit with docker.",
  "versions": [{
    "version": "1.0.0-1502068394",
    "providers": [{
      "name": "virtualbox",
      "url": "ubuntu-xenial-docker.box"
    }]
  }]
}

Add downloaded box by metadata:

vagrant box add foo.json

Check it out:

vagrant box list

The 1st run step-1.

Name the virtual machine step-2.

Set CPU cores and memory (using VirtualBox provider) step-3.

Add a host-only network step-4.

Bridge to chosen host network step-5.

Do something more to prepare the virtual machine step-6.

To prepare or regenerate your own key pair:

ssh-keygen -f insecure-key -N ''

SSH access by key pair:

ssh -i insecure-key vagrant@{IP}

Ignore host checking during first time login (potential MITM attack):

ssh -i insecure-key -o StrictHostKeyChecking=no vagrant@{IP}

Furthermore, force no password input:

ssh -i insecure-key -o StrictHostKeyChecking=no -o PasswordAuthentication=no vagrant@{IP}

Then VMs should be re-created to apply new keys.

Project resides in current directory, refer to Vagrantfile.

Refer to cluster-120/Vagrantfile-00{1..4}.

All machines are connected through bridged network, thus became public accessible.

TODO: use command line augments to unify physical cluster configuration.

Zhan.Shi @ 2017