Setup the VM machine using vagrant

Install VirtualBox

Install Vagrant

  Install VirtualBox  

        https://www.virtualbox.org/wiki/Downloads  --  for windows

                           

Install Vagrant

              https://releases.hashicorp.com/vagrant/  -- select the version (msi file for windows)

• Create a folder vagrant and open a command prompt
• run the command vagrant init from opened command prompt.
• A vagrant file will create in open folder.
• write a vagrant file for os.

Creating centos virtual machine.

    Vagrant file -  https://app.vagrantup.com/centos/boxes/8

Sample vagrant file for centos and past this line in vagrant file

  

     VAGRANTFILE_API_VERSION = "2"

 Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|

 config.vm.box = "centos/7"

 config.vm.hostname = "Server01"

 config.ssh.insert_key = false

 #config.vm.provision :shell, path: "VAGRANT_ENV/bootstrap.sh"

 # 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"

 config.vm.network "forwarded_port", guest: 80, host: 8888

 config.vm.network :public_network, :bridge => "eth1", :auto_config => false

 # Share an additional folder to the guest VM

 # config.vm.synced_folder ".", "/vagrant", disabled: true

 # config.vm.synced_folder ".", "/home/vagrant/provision", type: "rsync"

 config.vm.provider :virtualbox do |vb|

 # Set VM memory size

 vb.customize ["modifyvm", :id, "--memory", "20000"]

 # these 2 commands massively speed up DNS resolution, which means outbound

 # connections don't take forever (eg the WP admin dashboard and update page)

 vb.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]

 vb.customize ["modifyvm", :id, "--natdnsproxy1", "on"]

 end

 end

Multiple virtual machine from vagrant file

Vagrant.configure("2") do |config|

config.ssh.insert_key = false

config.vm.provider :virtualbox do |vb|

  vb.memory = 256

  vb.cpus = 1

end

#Disabling the default /vagrant share

config.vm.synced_folder ".", "/vagrant", disabled: true

MACHINE = ["docker-swarm-01","docker-swarm-01","docker-swarm-01"]

N = 2

(0..N).each do |i|

config.vm.define "server#{i}" do |node|

  node.vm.hostname = MACHINE[i]

  node.vm.box = "centos/7"

  node.vm.network :private_network, ip: "192.168.3.#{10+i}"

end

end

end 

and we need to run vagrant up from command prompt from vagrant file folder 

And will see the operating system in Virtual box