HashiCorp/Vagrant

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Install

Check your distro most likely Ubuntu version candidate 

apt-cache vagrant

Download from https://releases.hashicorp.com/vagrant/1.9.5/vagrant_1.9.5_x86_64.deb 

wget https://releases.hashicorp.com/vagrant/1.9.5/vagrant_1.9.5_x86_64.debb
sudo dpkg -i vagrant_1.9.5_x86_64.deb
sudo apt-get update && sudo apt-get install -f   #to resolve missing dependencies if any

Install ruby is recommended as configuration within Vagrant file is written in Ruby language. 

sudo apt-get install ruby
sudo gem install bundler
sudo gem update bundler    #if update needed

Getting started

Create Vagrant project, by creating Vagrantfile in your current directory
vagrant init #initializes an project 
vagrant init ubuntu/xenial64 # initializes project with Ubuntu16.04 Official Ubuntu 16.04 LTS (Xenial Xerus) Daily Build
Add boxes (standard VMs from providers in Virtualbox, VMware or Hyper-V format)
vagrant box add hashicorp/precise64      #username: hashicorp boximage: precise64, this is preconfigured repository
#Box can be specified via URLs or local file paths, Virtualbox can only nest 32bit machines
vagrant box add --force ubuntu/14.04 https://cloud-images.ubuntu.com/vagrant/trusty/current/trusty-server-cloudimg-amd64-vagrant-disk1.box
vagrant box add --force ubuntu/14.04-i386 https://cloud-images.ubuntu.com/vagrant/precise/current/precise-server-cloudimg-i386-vagrant-disk1.box
Configure Vagrantfile to use the box as your base system
Vagrant.configure("2") do |config|
 config.vm.box = "ubuntu/14.04-i386"      #or ubuntu/xenial64 for official Ubuntu16.04LTS
 config.vm.hostname = "ubuntu"   #hostname, requires reload
end
Power up your Vagrant box
vagrant up

Error: 

Timed out while waiting for the machine to boot. This means that
Vagrant was unable to communicate with the guest machine within
the configured ("config.vm.boot_timeout" value) time period.
...

The error above is due to Virtualbox cannot run nested 64bit virtualbox VM. Spinning up a 64bit VM stops with an error that no 64bit CPU could be found.

Ssh to the box
piotr@vm-ubuntu64:~/git/vagrant$ vagrant ssh    #default password is "vagrant"
vagrant@vagrant-ubuntu-precise-32:~$ w
 13:08:35 up 15 min,  1 user,  load average: 0.06, 0.31, 0.54
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
vagrant  pts/0    10.0.2.2         13:02    1.00s  4.63s  0.09s w
Shared directory between Vagrant VM and an hypervisor provider

Vagrant VM shares a directory mounted at /vagrant with the directory on the host containing your Vagrantfile

Delete Vagrant VM
vagrant destroy
Delete downloaded Vagrant VM image file
vagrant box remove

Build using a provisioning script (shell provisioner)

Vagrant can run from shared location script or from inline: Vagrant file shell provisioning commands.

Create provisioning script 

vi ~/git/vagrant/bootstrap.sh     
   #!/usr/bin/env bash
   export http_proxy=http://username:password@proxyserver.local:8080
   export https_proxy=$http_proxy 
   apt-get update
   apt-get install -y apache2
   if ! [ -L /var/www ]; then
      rm -rf /var/www
   ln -fs /vagrant /var/www       #configures that shared directory will be Apache DocumentRoot directory
   fi

Configure Vagrant to run this shell script above when setting up our machine 

vi ~/git/vagrant/Vagrantfile   
   Vagrant.configure("2") do |config|
      config.vm.box = "ubuntu/14.04-i386"
      #the provision line tells Vagrant to use the shell provisioner to setup the machine
      config.vm.provision :shell, path: "bootstrap.sh"
   end

Bring the environment up 

 vagrant up                   #runs provisioning only once
 vagrant reload --provision   #reloads VM skipping import and runs provisioning
 vagrant ssh                  #ssh to VM
 wget -qO- 127.0.0.1          #test Apache is running on VM
Provisioners - shell, ansible, ansible_local and more

This section is about using Ansible with Vagrant, 

*ansible, where Ansible is executed on the Vagrant host
*ansible_local, where Ansible is executed on the Vagrant guest

Specify Ansible as a provisioner in Vagrant file 

#
# Run Ansible from the Vagrant Host
#
config.vm.provision "ansible" do |ansible|
   ansible.playbook = "playbook.yml"
end
Networking - port forwarding

Vagrant can forward any host(hypervisor) TCP port to guest vm specyfing in ~/git/vargant/Vagrant file 

config.vm.network :forwarded_port, guest: 80, host: 4567

Reload Vagrant VM 

vagrant reload

Run on the host from a web browser http://127.0.0.1:4567 to test it.

Vagrant power states
  • vagrant suspend - saves the current running state of the machine and stop it
  • vagrant halt - gracefully shuts down the guest operating system and power down the guest machine
  • vagrant destroy - removes all traces of the guest machine from your system. It'll stop the guest machine, power it down, and remove all of the guest hard disks
Vagrant providers

Vagrant can work with a wide variety of backend providers, such as VMware, AWS, and more without changing Vagrantfile. It's enough to specify the provider and Vagrant will do the rest: 

vagrant up --provider=vmware_fusion
vagrant up --provider=aws

Vagrant box images

vagrant box list   #list all downloaded boxes

Default path of boxes image 

C:\Users\%username%\.vagrant.d\boxes  #Windows
~/.vagrant.d/boxes                    #LInux

Change default path via environment variable 

export VAGRANT_HOME=my/new/path/goes/here/

Enable Vagrant to use proxy server for VMs

Install proxyconf: 

vagrant plugin install vagrant-proxyconf

Configure your Vagrantfile, here particularly host 10.0.0.1:3128 runs CNTLM proxy 

Vagrant.configure("2") do |config| 
    config.proxy.http = "http://10.0.0.1:3128"
    config.proxy.https = "http://10.0.0.1:3128"
    config.proxy.no_proxy = "localhost,127.0.0.1"

Virtualbox Guest Additions - upgrade

Find out what version you run 

$ lsmod | grep -io vboxguest | xargs modinfo | grep -iw version
version:        4.3.36_Ubuntu

or 

$ sudo /usr/sbin/VBoxService --version
4.3.36_Ubuntur105129

Download the extension, you can explore here 

wget http://download.virtualbox.org/virtualbox/5.0.32/VBoxGuestAdditions_5.0.32.iso

wip... see references for the rest of steps, next step instal vagrant plugin vb...

References

List all Virtualbox SSH redirections

vboxmanage list vms | cut -d ' ' -f 2  > /tmp/vms.out && for vm in $(cat /tmp/vms.out); do vboxmanage showvminfo "$vm" | grep ssh; done
vboxmanage list vms | cut -d ' ' -f 1 | sed 's/"//g' > /tmp/vms.out && for vm in $(cat /tmp/vms.out); do echo $vm; vboxmanage showvminfo "$vm" | grep ssh; done
vboxmanage list vms | cut -d ' ' -f 1 | sed 's/"//g' > /tmp/vms.out && for vm in $(cat /tmp/vms.out); do vboxmanage showvminfo "$vm" | grep ssh | tr --delete '\n'; echo " $vm"; done

sed 's/"//g'      #removes double quotes from whole string
tr --delete '\n'  #deletes EOL, so the next command output is appended to the previous line

Print connections count in line 

while true; do echo -n `ss -at | wc -l`" " ; sleep 3; done

Example Vagrantfile by building a simple cluster

git clone https://github.com/jweissig/episode-45

This creates Ansible mgmt server, Load Balancer and Web nodes [1..2]. HAProxy will be configured via Ansible code. 

# Defines our Vagrant environment
#
# -*- mode: ruby -*-
# vi: set ft=ruby :

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

  # create mgmt node
  config.vm.define :mgmt do |mgmt_config|
      mgmt_config.vm.box = "ubuntu/trusty64"
      mgmt_config.vm.hostname = "mgmt"
      mgmt_config.vm.network :private_network, ip: "10.0.15.10"
      mgmt_config.vm.provider "virtualbox" do |vb|
        vb.memory = "256"
      end
      mgmt_config.vm.provision :shell, path: "bootstrap-mgmt.sh"
  end

  # create load balancer
  config.vm.define :lb do |lb_config|
      lb_config.vm.box = "ubuntu/trusty64"
      lb_config.vm.hostname = "lb"
      lb_config.vm.network :private_network, ip: "10.0.15.11"
      lb_config.vm.network "forwarded_port", guest: 80, host: 8080
      lb_config.vm.provider "virtualbox" do |vb|
        vb.memory = "256"
      end
  end

  # create some web servers
  # https://docs.vagrantup.com/v2/vagrantfile/tips.html
  (1..2).each do |i|
    config.vm.define "web#{i}" do |node|
        node.vm.box = "ubuntu/trusty64"
        node.vm.hostname = "web#{i}"
        node.vm.network :private_network, ip: "10.0.15.2#{i}"
        node.vm.network "forwarded_port", guest: 80, host: "808#{i}"
        node.vm.provider "virtualbox" do |vb|
          vb.memory = "256"
        end
    end
  end
end

Boot strap script bootstrap-mgmt.sh 

#!/usr/bin/env bash

# install ansible (http://docs.ansible.com/intro_installation.html)
apt-get -y install software-properties-common
apt-add-repository -y ppa:ansible/ansible
apt-get update
apt-get -y install ansible

# copy examples into /home/vagrant (from inside the mgmt node)
cp -a /vagrant/examples/* /home/vagrant
chown -R vagrant:vagrant /home/vagrant

# configure hosts file for our internal network defined by Vagrantfile
cat >> /etc/hosts <<EOL
# vagrant environment nodes
10.0.15.10  mgmt
10.0.15.11  lb
10.0.15.21  web1
10.0.15.22  web2
10.0.15.23  web3
10.0.15.24  web4
10.0.15.25  web5
10.0.15.26  web6
10.0.15.27  web7
10.0.15.28  web8
10.0.15.29  web9
EOL

Gitbash path - /c/Program\ Files/Oracle/VirtualBox/VBoxManage.exe

Set bootstrap script for Proxy or No-proxy specific system 

Vagrant status
Vagrant up
Vagrant ssh mgmt
ansible all --list-hosts
ssh-keyscan web1 web2 lb > ~/.ssh/known_hosts
ansible-playbook ssh-addkey.yml -u vagrant --ask-pass
ansible-playbook site.yml

Once set it up you can navigate on your laptop to: 

http://localhost:8080/                    #Website test
http://localhost:8080/haproxy?stats       #HAProxy stats

Use to verify end server 

curl -I http://localhost:8080
Curl -i X-Backend-Server

Generate web traffic 

vagrant ssh lb
sudo apt-get install apache2-utils
ansible localhost -m apt -a "pkg=apache2-utils state=present" --become
ab -n 1000 -c 1 http://10.0.2.15:80/


The above is a curtsy of sysadmincasts.com can be git cloned: 

 git clone https://github.com/jweissig/episode-45

Resources

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