Server management with salt – h4: Vagrant

This assignment was completed in full from my personal desktop, with a live-USB running Xubuntu 18.04.1 and a virtual machine running Ubuntu 18.04.1
Markdown version here

A script to turn your computer into a salt minion (19.11 – 12:10)

I created a simple bash-script to: * update package-repository * install salt-minion * edit the minion config file * restart salt-minon.service

This is what my “minionize.sh” script looks like

#!/bin/sh
sudo apt-get update
sudo apt-get install salt-minion -y
echo "master: 178.128.206.165" | sudo tee /etc/salt/minion 
sudo systemctl restart salt-minion.service

Installing and testing Vagrant (12:36)

I started by installing Vagrant and virtualbox

sudo apt-get install virtualbox vagrant -y

Next i had to decide which OS i want to run in my Vagrant box.

I chose precise64, because it’s managed by Hashicorp, it’s in top 3 at Vagrant’s box listing and it’s also used in this quick setup guide i’m using.

To create a Vagrant box with said image:

sudo vagrant init hashicorp/precise64
sudo vagrant up

Running these commands did not work at first, and i was greeted with an error:

VT-x is disabled in the BIOS for both all CPU modes (VERR_VMX_MSR_ALL_VMX_DISABLED)

Luckily the error was pretty descriptive: something called VT-x has to be enabled in my BIOS for virtualization to work. A quick trip to Stackoverflow confirmed that VT-x stands for Intel Virtualization technology

For my Asus z370-P motherboard it was located under Advanced > CPU > Intel Virtualization technology.

This worked, and running the commands again succesfully deployed a vagrant virtualbox. To log into my newly created virutal OS:

sudo vagrant ssh

Multiple different Vagrant instances (13:48)

I wanted to try running multiple different Vagrant-boxes with different operating-systems side by side.

I first made the folders for my new instance:

mkdir vagrant_2

I did this because deploying Vagrant creates a config file to your current directory, and therefore you need different locatons for different instances.

Setting up the additional Vagrant-instances

The way to set these boxes up is identical to the one we already did, so i won’t go into great detail about it.

I decided to scroll a bit further down on the vagrant image-list to see if i could find something more exotic that just a regular OS.

Scotch-box

Scotch box is a is “Just a dead-simple local LAMP stack for developers that just works.”

I navigated to my vagrant_2 folder and issued commands:

sudo vagrant init scotch/box
sudo vagrant up

I then made this virtual machine a minion using the script i made earlier to quickly configure the already installed LAMP stack on this machine using salt.

Scotchbox$ bash minionize.sh
master$ sudo salt-key -A
The following keys are going to be accepted:
Unaccepted Keys:
vagrant.vm
Proceed? [n/Y] Y
Key for minion vagrant.vm accepted.
master$ sudo salt "vagrant.vm" state.highstate
The salt state i executed can be found here

Everything else worked, but for some reason salt was unable to restart the services, and could not create the public_html directory. I did these manually.

Things i will try out later/didn’t feel like solving right now

  • You can configure the Vagrantfile to host multiple VMs in a single directory. However if there’s no practical need to do so, i find it easier to just host them in separate directories.
  • You can start different VMs by CDing to their respective directories and issuing vagrant ssh You can use an ID if there are many VMs configured in a single directory.
  • I have no idea how to access VMs localhost. (Port forwarding needed?)

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