How to Install Vagrant on Centos 7/8 and Ubuntu 18

Onur Yasarlar
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Linux
How to Install KVM on CentOS 7/8 and Ubuntu 18/20
How to Install VirtualBox on CentOS 7/8 and Ubuntu 18
How to Install Vagrant on Centos 7/8 and Ubuntu 18
Using vim Effectively
Kubernetes
How to Install a Kubernetes Cluster
How to Install and Use K3D
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How to Install Vagrant on Centos 7/8 and Ubuntu 18
Getting Started
If you are running a home lab, it is inevitable that you will want to provision new VMs and would like to run your tests. There is always an option to create a golden image and then clone it if you need new VMs but why should you bother yourself to handle it all manually.  Hashicorp already provides perfect automation for you, Vagrant.  I do personally like it as you can keep all your infrastructure with Infrastructure as Code approach in your Vagrantfile. So let's see how we can install vagrant on top of our hypervisor.
 There is no official VirtualBox package for Ubuntu 20 while I am writing this post so I am skipping it
 There are also some manual steps required to install libvirt vagrant plugin on Centos 8. That's why I am also skipping it, but you can refer to the official documentation if you want to install the plugin on Centos 8
Prerequisites
The first prerequisite is the obvious one: hypervisor. We first need to have a running hypervisor and you can refer to my post to install either KVM or VirtualBox. I personally prefer KVM over VirtualBox.
I again collected all the prerequisites under tasks/prereq.yaml play:
tasks/prereq.yaml
---
- name: Setting OS version fact
  set_fact:
    osversion: "{{ ansible_distribution | lower }}{{ ansible_distribution_major_version }}"
​
- name: Check OS version
  fail:
    msg: "OS Version( {{ ansible_distribution }}{{ ansible_distribution_major_version }} ) is not certified for the role"
  when:
    - osversion != "ubuntu18"
    - osversion != "centos7"
    - osversion != "centos8"
​
- name: Check default vagrant provider variable
  fail:
    msg: "Default vagrant provider can be either libvirt or virtualbox"
  when:
    - default_provider != "libvirt"
    - default_provider != "virtualbox"
​
- name: Check default provider for Centos 8
  fail:
    msg:
      - "Centos 8 has some issues with vagrant pluging that cannot be automated"
      - "Please refer to the original documentation for manual steps"
      - "https://github.com/vagrant-libvirt/vagrant-libvirt"
  when: (default_provider == "libvirt") and (osversion == "centos8")
​
Variables
As I prefer KVM, I made libvirt provider the default provider for the role. You can feel free to change the provider to virtualbox in vars/main.yml file.
vars/main.yml
---
# vars file for ansible-role-vagrant
vagrant_version: "2.2.14"
vagrant_base_url: "https://releases.hashicorp.com/vagrant/{{ vagrant_version }}"
default_provider: "libvirt"
​
Main Playbook
I will also follow my habit to divide plays into smaller pieces in my tasks/main.yml file. I prefer to include operating system based plays in my main play.
tasks/main.yml
---
# tasks file for ansible-role-vagrant
- name: Prereq check
  include_tasks: prereq.yaml
​
- name: Install and Configure for CentOS
  include_tasks: centos.yaml
  when: ansible_distribution == "CentOS"
​
- name: Install and Configure for Ubuntu
  include_tasks: ubuntu.yaml
  when: ansible_distribution == "Ubuntu"
​
Vagrant Installation on Centos 7/8
If your vagrant provider will be VirtualBox, it is pretty straightforward. You will just need to install vagrant. If you will be installing vagrant for libvirt provider, then you will need to install some dependencies. Thanks to the open-source community, there is a module supported by 100s of contributors here. This module will allow you run vagrant commands under KVM without any hassle. 
tasks/centos.yaml
---
- name: "Install vagrant binary on Centos 7"
  yum:
    name: "{{ vagrant_base_url }}/vagrant_{{ vagrant_version }}_x86_64.rpm"
    state: present
  when: ansible_distribution_major_version == "7"
​
# Fails if GPG check is enabled. Will find a better way.
- name: "Install vagrant binary on Centos 8"
  dnf:
    name: "{{ vagrant_base_url }}/vagrant_{{ vagrant_version }}_x86_64.rpm"
    state: present
    disable_gpg_check: true
  when: ansible_distribution_major_version == "8"
​
- name: "Install libvirt vagrant plugin"
  block:
    - name: Install vagrant Plugin prereqs
      yum:
        name:
          - libvirt
          - libvirt-devel
          - ruby-devel
          - qemu-kvm
          - libxslt-devel
          - libxml2-devel
          - libvirt-devel
          - libguestfs-tools-c
          - ruby-devel
          - gcc
​
    - name: Install vagrant libvirt plugin
      command: "vagrant plugin install vagrant-libvirt"
      become: false
  when: default_provider == "libvirt"
​
Vagrant Installation on Ubuntu 18
If your vagrant provider will be VirtualBox, it is pretty straightforward. You will just need to install vagrant. If you will be installing vagrant for libvirt provider, then you will need to install some dependencies. Thanks to the open-source community, there is a module supported by 100s of contributors here. This module will allow you run vagrant commands under KVM without any hassle. 
The module requires one of the source repositories to be enabled, but I couldn't find an easier way to only enable main source repository so I decided to enable all in /etc/apt/sources.list but feel free to comment if you have a better solution. I could have used replace module with backup option and then could have restored the file after the installation is finished but I will handle it in a better way later. My exposure with Ubuntu / Debian administration is fairly new so I am sure there is a proper way to do it.
tasks/ubuntu.yaml
---
- name: "Install Vagrant"
  apt:
    deb: "{{ vagrant_base_url }}/vagrant_{{ vagrant_version }}_x86_64.deb"
​
- name: Install libvirt vagrant dependencies
  block:
    # I couldn't find a better way to enable source repositories
    - name: Enable source libraries
      replace:
        path: /etc/apt/sources.list
        regexp: '^#( deb-src http.*)'
        replace: '\1'
​
    - name: Install build dependencies
      apt:
        name:
          - vagrant
          - ruby-libvirt
        state: build-dep
        update_cache: true
​
    - name: Install prereq packages
      apt:
        name:
          - qemu
          - libvirt-bin
          - ebtables
          - dnsmasq-base
          - libxslt-dev
          - libxml2-dev
          - libvirt-dev
          - zlib1g-dev
          - ruby-dev
​
    - name: Install vagrant libvirt plugin
      command: "vagrant plugin install vagrant-libvirt"
      become: false
  when: default_provider == "libvirt"
​
Putting things together
You can also use my Ansible roles to install vagrant along with the KVM or VirtualBox. You can download my roles with ansible-galaxyand then add it in a playbook as below:
Install KVM with Vagrant
---
- name: Install KVM with Vagrant
  hosts: myhypervisor
  become: yes
  roles:
    - { role: yasarlaro.kvm, libvirt_user: "admin" }
    - { role: yasarlaro.vagrant, default_provider: "libvirt" }
    
or
Install VirtualBox with Vagrant
---
- name: Install VirtualBox with Vagrant
  hosts: myhypervisor
  become: yes
  roles:
    - { role: yasarlaro.virtualbox }
    - { role: yasarlaro.vagrant, default_provider: "virtualbox" }
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Outline
Vagrant Installation on Centos 7/8
Vagrant Installation on Ubuntu 18
Putting things together