Vagrant - Creating Multi VMs

Vagrant is able to define and control multiple guest machines per Vagrantfile. This is known as a "multi-machine" environment. In this post, I'll show you how to deploy multiple VMS using a single vagrant file. You can read more about it in the official vagrant documentation.



Let's start with the basics, copy the code from the vagrant site into notepad:

Vagrant.configure("2") do |config|
  config.vm.provision "shell", inline: "echo Hello" #will run commands on all machines in this file

  config.vm.define "web" do |web|#VM No'1
    web.vm.box = "apache"
  end

  config.vm.define "db" do |db|#VM No'2
    db.vm.box = "mysql"
  end
end

Let's start with basic changes such as VM names, Memory, and CPUs:

Vagrant.configure("2") do |config|
  #config.vm.provision "shell", inline: "echo Hello" #will run commands on all machines in this file

  config.vm.define "web01" do |web01|#VM No'1
    web01.vm.box = "ubunto/bionic64" #Setting machine type
	web01.vm.network "private_network", ip: "192.168.33.22"#Set static IP
	web01.vm.provider "virtualbox" do |vb| #Set Memory and CPUs
    vb.memory = "1024"
	vb.cpus = 2
   end
  end

  config.vm.define "db01" do |db01|#VM No'2
    db01.vm.box = "geerlingguy/centos7"#Setting machine type
	db01.vm.network "private_network", ip: "192.168.33.23"#Set static IP
	db01.vm.provider "virtualbox" do |vb| #Set Memory and CPUs
    vb.memory = "1024"
	vb.cpus = 2
   end
  end
end


Adding provisioning code to a specific machine (we can add specific code per machine):

Vagrant.configure("2") do |config|
  #config.vm.provision "shell", inline: "echo Hello" #will run commands on all machines in this file

  config.vm.define "web01" do |web01|#VM No'1
    web01.vm.box = "ubunto/bionic64" #Setting machine type
	web01.vm.network "private_network", ip: "192.168.33.22"#Set static IP
	web01.vm.provider "virtualbox" do |vb| #Set Memory and CPUs
    vb.memory = "1024"
	vb.cpus = 2
   end 
  end

  config.vm.define "db01" do |db01|#VM No'2
    db01.vm.box = "geerlingguy/centos7"#Setting machine type
	db01.vm.network "private_network", ip: "192.168.33.23"#Set static IP
	db01.vm.provider "virtualbox" do |vb| #Set Memory and CPUs
    vb.memory = "1024"
	vb.cpus = 2
   end
   config.vm.provision "shell", inline: <<-SHELL
     yum install httpd wget unzip -y
	 systemctl start httpd
	 systemctl enable httpd
	 cd /tmp/
	 wget https://www.tooplate.com/zip-templates/2119_gymso_fitness.zip
	 unzip -o 2119_gymso_fitness.zip
	 cp -r 2119_gymso_fitness/* /var/www/html/
	 systemctl restart httpd
   SHELL
  end
end

Now its time to test it:


Normally, we would use the vagrant up command to start a VM in a specific directory, but now that we have multiple VMs, we must also specify the machine's name:

David@DESKTOP-VIK2BBH MINGW64 /c/vagrant/multivms
$ vagrant ssh db01
[vagrant@localhost ~]$ exit
logout

David@DESKTOP-VIK2BBH MINGW64 /c/vagrant/multivms
$ vagrant ssh web01
Welcome to Ubuntu 18.04.6 LTS (GNU/Linux 4.15.0-180-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

  System information as of Sun Jun 12 16:15:46 UTC 2022

  System load:  0.0               Processes:             98
  Usage of /:   2.9% of 38.71GB   Users logged in:       0
  Memory usage: 13%               IP address for enp0s3: 10.0.2.15
  Swap usage:   0%                IP address for enp0s8: 192.168.33.22


0 updates can be applied immediately.

New release '20.04.4 LTS' available.
Run 'do-release-upgrade' to upgrade to it.




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