Multiple nodes on Vagrant

18 May 2015

Recently I started working with Vagrant. A vagrant is a good tool that you can use for development. From this post, I’m going to explain how to create multiple nodes on the Vagrant project.

$ mkdir testProject
$ cd testProject
$ vagrant init

If you run above commands, it will create a Vagrant project for you. Now we have to do changes to the vagrant file. Your initial vagrant file will look like below.

# -*- mode: ruby -*-
# vi: set ft=ruby :

# All Vagrant configuration is done below. The "2" in Vagrant.configure
# configures the configuration version (we support older styles for
# backwards compatibility). Please don't change it unless you know what
# you're doing.
Vagrant.configure(2) do |config|
  # The most common configuration options are documented and commented below.
  # For a complete reference, please see the online documentation at
  # https://docs.vagrantup.com.

  # Every Vagrant development environment requires a box. You can search for
  # boxes at https://atlas.hashicorp.com/search.
  config.vm.box = "base"

  # Disable automatic box update checking. If you disable this, then
  # boxes will only be checked for updates when the user runs
  # `vagrant box outdated`. This is not recommended.
  # config.vm.box_check_update = false

  # Create a forwarded port mapping which allows access to a specific port
  # within the machine from a port on the host machine. In the example below,
  # accessing "localhost:8080" will access port 80 on the guest machine.
  # config.vm.network "forwarded_port", guest: 80, host: 8080

  # Create a private network, which allows host-only access to the machine
  # using a specific IP.
  # config.vm.network "private_network", ip: "192.168.33.10"

  # Create a public network, which generally matched to bridged network.
  # Bridged networks make the machine appear as another physical device on
  # your network.
  # config.vm.network "public_network"

  # Share an additional folder to the guest VM. The first argument is
  # the path on the host to the actual folder. The second argument is
  # the path on the guest to mount the folder. And the optional third
  # argument is a set of non-required options.
  # config.vm.synced_folder "../data", "/vagrant_data"

  # Provider-specific configuration so you can fine-tune various
  # backing providers for Vagrant. These expose provider-specific options.
  # Example for VirtualBox:
  #
  # config.vm.provider "virtualbox" do |vb|
  #   # Display the VirtualBox GUI when booting the machine
  #   vb.gui = true
  #
  #   # Customize the amount of memory on the VM:
  #   vb.memory = "1024"
  # end
  #
  # View the documentation for the provider you are using for more
  # information on available options.

  # Define a Vagrant Push strategy for pushing to Atlas. Other push strategies
  # such as FTP and Heroku are also available. See the documentation at
  # https://docs.vagrantup.com/v2/push/atlas.html for more information.
  # config.push.define "atlas" do |push|
  #   push.app = "YOUR_ATLAS_USERNAME/YOUR_APPLICATION_NAME"
  # end

  # Enable provisioning with a shell script. Additional provisioners such as
  # Puppet, Chef, Ansible, Salt, and Docker are also available. Please see the
  # documentation for more information about their specific syntax and use.
  # config.vm.provision "shell", inline: <<-SHELL
  #   sudo apt-get update
  #   sudo apt-get install -y apache2
  # SHELL
end

You have to edit Vagrantfile add content like below.

Vagrant.configure("2") do |config|
  config.vm.define "master" do |master|    
    master.vm.box = "ubuntu/trusty64"
    master.vm.hostname = "master.local"
    master.vm.network "private_network", ip: "192.168.2.2"
  end

  config.vm.define "slave1" do |slave1|
    slave1.vm.box = "ubuntu/trusty64"
    slave1.vm.network :private_network, ip: "192.168.2.3"
    slave1.vm.hostname = "slave1.local"
  end

  config.vm.define "slave2" do |slave2|
    slave2.vm.box = "ubuntu/trusty64"
    slave2.vm.network :private_network, ip: "192.168.2.4"
    slave2.vm.hostname = "slave2.local"
  end
end

Above sample vagrant file will create three nodes. Now run below command to start Vagrant virtual machines.

$ vagrant up

If you followed the instruction properly, you will get an output like below.

Bringing machine 'master' up with 'virtualbox' provider...
Bringing machine 'slave1' up with 'virtualbox' provider...
Bringing machine 'slave2' up with 'virtualbox' provider...
==> master: Importing base box 'ubuntu/trusty64'...
==> master: Matching MAC address for NAT networking...
==> master: Checking if box 'ubuntu/trusty64' is up to date...
==> master: A newer version of the box 'ubuntu/trusty64' is available! You currently
==> master: have version '20150420.1.1'. The latest is version '20150512.0.1'. Run
==> master: `vagrant box update` to update.
==> master: Setting the name of the VM: test2_master_1431951423815_51724
==> master: Clearing any previously set forwarded ports...
==> master: Clearing any previously set network interfaces...
==> master: Preparing network interfaces based on configuration...
    master: Adapter 1: nat
    master: Adapter 2: hostonly
==> master: Forwarding ports...
    master: 22 => 2222 (adapter 1)
==> master: Booting VM...
==> master: Waiting for machine to boot. This may take a few minutes...
    master: SSH address: 127.0.0.1:2222
    master: SSH username: vagrant
    master: SSH auth method: private key
    master: Warning: Connection timeout. Retrying...
    master: Warning: Remote connection disconnect. Retrying...
    master: 
    master: Vagrant insecure key detected. Vagrant will automatically replace
    master: this with a newly generated keypair for better security.
    master: 
    master: Inserting generated public key within guest...
    master: Removing insecure key from the guest if its present...
    master: Key inserted! Disconnecting and reconnecting using new SSH key...
==> master: Machine booted and ready!
==> master: Checking for guest additions in VM...
==> master: Setting hostname...
==> master: Configuring and enabling network interfaces...
==> master: Mounting shared folders...
    master: /vagrant => /Users/ddhananjaya/Downloads/test2
==> slave1: Importing base box 'ubuntu/trusty64'...
==> slave1: Matching MAC address for NAT networking...
==> slave1: Checking if box 'ubuntu/trusty64' is up to date...
==> slave1: A newer version of the box 'ubuntu/trusty64' is available! You currently
==> slave1: have version '20150420.1.1'. The latest is version '20150512.0.1'. Run
==> slave1: `vagrant box update` to update.
==> slave1: Setting the name of the VM: test2_slave1_1431951479185_96384
==> slave1: Clearing any previously set forwarded ports...
==> slave1: Fixed port collision for 22 => 2222. Now on port 2200.
==> slave1: Clearing any previously set network interfaces...
==> slave1: Preparing network interfaces based on configuration...
    slave1: Adapter 1: nat
    slave1: Adapter 2: hostonly
==> slave1: Forwarding ports...
    slave1: 22 => 2200 (adapter 1)
==> slave1: Booting VM...
==> slave1: Waiting for machine to boot. This may take a few minutes...
    slave1: SSH address: 127.0.0.1:2200
    slave1: SSH username: vagrant
    slave1: SSH auth method: private key
    slave1: Warning: Connection timeout. Retrying...
    slave1: Warning: Remote connection disconnect. Retrying...
    slave1: 
    slave1: Vagrant insecure key detected. Vagrant will automatically replace
    slave1: this with a newly generated keypair for better security.
    slave1: 
    slave1: Inserting generated public key within guest...
    slave1: Removing insecure key from the guest if its present...
    slave1: Key inserted! Disconnecting and reconnecting using new SSH key...
==> slave1: Machine booted and ready!
==> slave1: Checking for guest additions in VM...
==> slave1: Setting hostname...
==> slave1: Configuring and enabling network interfaces...
==> slave1: Mounting shared folders...
    slave1: /vagrant => /Users/ddhananjaya/Downloads/test2
==> slave2: Importing base box 'ubuntu/trusty64'...
==> slave2: Matching MAC address for NAT networking...
==> slave2: Checking if box 'ubuntu/trusty64' is up to date...
==> slave2: A newer version of the box 'ubuntu/trusty64' is available! You currently
==> slave2: have version '20150420.1.1'. The latest is version '20150512.0.1'. Run
==> slave2: `vagrant box update` to update.
==> slave2: Setting the name of the VM: test2_slave2_1431951533297_11049
==> slave2: Clearing any previously set forwarded ports...
==> slave2: Fixed port collision for 22 => 2222. Now on port 2201.
==> slave2: Clearing any previously set network interfaces...
==> slave2: Preparing network interfaces based on configuration...
    slave2: Adapter 1: nat
    slave2: Adapter 2: hostonly
==> slave2: Forwarding ports...
    slave2: 22 => 2201 (adapter 1)
==> slave2: Booting VM...
==> slave2: Waiting for machine to boot. This may take a few minutes...
    slave2: SSH address: 127.0.0.1:2201
    slave2: SSH username: vagrant
    slave2: SSH auth method: private key
    slave2: Warning: Connection timeout. Retrying...
    slave2: Warning: Remote connection disconnect. Retrying...
    slave2: 
    slave2: Vagrant insecure key detected. Vagrant will automatically replace
    slave2: this with a newly generated keypair for better security.
    slave2: 
    slave2: Inserting generated public key within guest...
    slave2: Removing insecure key from the guest if its present...
    slave2: Key inserted! Disconnecting and reconnecting using new SSH key...
==> slave2: Machine booted and ready!
==> slave2: Checking for guest additions in VM...
==> slave2: Setting hostname...
==> slave2: Configuring and enabling network interfaces...
==> slave2: Mounting shared folders...
    slave2: /vagrant => /Users/ddhananjaya/Downloads/test2

If you want to connect to the master node, run below command.

$ vagrant ssh master

If you want to connect to slave1 node, run below command.

$ vagrant ssh slave1

Whatever the machine you want to connect you just have to type vagrant ssh. Hope this will help you!

Multiple nodes on Vagrant

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