02 - Vagrant

Download the following initial tools for DevOps Labs

• VirtualBox - www.virtualbox.org
• Gitscm - git-scm.com/download - Git Bash ( Unix based console in windows )
• Vagrant - vagrantup.com/downloads
• Search vagrant cloud for Market Place
• https://app.vagrantup.com/boxes/search

Vagrant

• Vagrant is computer software for creating and configuring virtual development environments.
• It can be seen as wrapper around virtualization software such as VirtualBox, KVM, VMware, and around configuration management software such as Ansible, Chef, Salt or Puppet.
• Vagrant is simpler way to Virtualizaiton and configuraiton management.

• Create folder for lab
• mkdir devlab
• cd devlab
• mkdir vm1
• mkdir vm2
• cd vm1

• Initiat vagrant and config new vm

• vagrant init
• vi vagrantfile

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

config.vm.box = "bento/centos-7.5"

                      config.vm.hostname = "testVM"

                 # *** Define VM box and host name

                    Vagrant.configure("2") do |config|                             config.vm.provider "virtualbox" do |v|                               v.name = "testVM"                       end

                     # *** Define network and port 

config.vm.network "forwarded_port" , guest: 80, host: 8080

config.vm.network "private_network", ip: "192.168.33.14"

                # *** Define Memory and CPU

config.vm.provider "virtualbox" do |vb|

   vb.memory = "2048"

   vb.cpus = "2"

end

end

Useful Commands

• vagrant init -- Initialize Vagrant with a Vagrantfile and ./.vagrant directory, using no specified base image. Before you can do vagrant up, you'll need to specify a base image in the Vagrantfile.
• vagrant up -- starts vagrant environment (also provisions only on the FIRST vagrant up)
• vagrant ssh -- connects to machine via SSH
• vagrant ssh <boxname> -- If you give your box a name in your Vagrantfile, you can ssh into it with boxname. Works from any directory.

• vagrant halt -- stops the vagrant machine
• vagrant suspend -- suspends a virtual machine (remembers state)
• vagrant destroy -- stops and deletes all traces of the vagrant machine
• vagrant destroy -f -- same as above, without confirmation

• vagrant -v -- get the vagrant version
• vagrant status -- outputs status of the vagrant machine
• vagrant global-status -- outputs status of all vagrant machines
• vagrant global-status --prune -- same as above, but prunes invalid entries
• vagrant provision --debug -- use the debug flag to increase the verbosity of the output
• vagrant push -- yes, vagrant can be configured to deploy code!
• vagrant up --provision | tee provision.log -- Runs vagrant up, forces provisioning and logs all output to a file

• sudo su -
• ifconfig
• free -m
• cat /proc/cpuinfo
• vagrant halt            ** VM power off
• vagrant destory      ** Destory VM
• rm -rf .vagrant

Create 2 VM's using the static configuration

$ vi Vagrantfile

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

config.vm.define "vm1" do |vm1|

    vm1.vm.box = "ubuntu/bionic64"

    vm1.vm.hostname = "linuxvm1"

    vm1.vm.network "private_network", ip: "192.168.33.30"

    config.vm.provider "virtualbox" do |vb|

            vb.memory = "2048"

            vb.cpus = "2"

            vb.name = "linuxvm1"

    end

end

config.vm.define "vm2" do |vm2|

    vm2.vm.box = "ubuntu/bionic64"

    vm2.vm.hostname = "linuxvm2"

    vm2.vm.network "private_network", ip: "192.168.33.31"

    config.vm.provider "virtualbox" do |vb|

            vb.memory = "1024"

            vb.cpus = "1"

            vb.name = "linuxvm2"

    end

end

end

Vagrant create multiple VMs loops

https://www.devopsroles.com/vagrant-create-multiple-vms/

$ vi Vagrantfile

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

    config.vm.provider :virtualbox do |vb|

      vb.memory = 1024

      vb.cpus = 1

    end

    MACHINE = ["app1.dev","db.dev"]

    N = 1

    (0..N).each do |i|

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

      node.vm.hostname = MACHINE[i]

      node.vm.box = "bento/centos-7.5"

      node.vm.network :private_network, ip: "192.168.33.#{10+i}"

    end

end

 # Update the server to latest version

 config.vm.provision :shell, :inline => "yum install -y net-tools"

end