DevOps Learning

Deploy WordPress on KataCoda Kubernetes 2022-03-11
A step by step guide to deploying WordPress on Kubernetes provided by the KataCoda website. Please note that this shouldn’t be used for a production deployment and should only be used for learning and/or practice.
Create a Secret for the MySQL Password
The first step is to create a secret that can be used to store the MySQL database password. Later in the deployment this will be used in creating the MySQL database pod and then used by the WordPress pod to connect to the database.

Vagrant Ubuntu with Docker install 2022-03-09

Creating an Ubuntu VirtualBox and installing Docker.

Vagrantfile

Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/bionic64"
  
  config.vm.define "docker-1" do |node|
    node.vm.hostname = "docker-1"
    config.vm.box_check_update = false
    config.vm.network "public_network"
    config.vm.provider "virtualbox" do |vb|
      vb.name = "docker-1"
      vb.memory = "2048"
      vb.cpus = "2"
    end

    node.vm.provision "install-docker", type: "shell", :path => "ubuntu/install-docker-2.sh"
  end
  
end

install-docker-2.sh

cd /tmp
curl -fsSL https://get.docker.com -o get-docker.sh
sh /tmp/get-docker.sh

vagrant up

Wait for the virtual machines to get created and started. Then ssh into it.

vagrant ssh docker-1

Add the vagrant user to the docker group (this could probably be added to the script).

Building a VirtualBox ISO with Packer 2022-03-08
I wanted to try building my own Vagrant base box, I decided to use one of the chef bento templates for ease.
It was moving along nicely, downloaded the ISO, verified the checksum and suddenly this error appears.
```
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component MachineWrap, interface IMachine packer
```
Not quite sure where to start I decided to do a quick Google, read some posts about VirtualBox modules. I was quite sure that wasn’t my issue. So I went to GitHub where I saw a couple of issues that said set headless to true. Being new to packer, I didn’t really understand what that meant. After more reading I finally found it and decided I’d make this quick post about it.
VBoxManage - Manage VirtualBox VMs From The Command Line 2022-03-07
VirtualBox is a fantastic tool, previously I had been using it from the GUI. However, recently I started running it remotely on a server and using VNC to connect and manage the virtual machines. I decided that I would rather use the command line for this task as well. However, remembering all the commands is proving difficult. So I’m going to create a list and hopefully help myself and others along the way.

Create a Secret for the MySQL Password