PiHole, What’s That?​

The Wikipedia definition should be sufficient in explaining what the software does:

Pi-hole or Pihole is a Linux network-level advertisement and Internet tracker blocking application which acts as a DNS sinkhole and optionally a DHCP server, intended for use on a private network

I wanted to deploy it for a few reasons:

• I have a spare Raspberry Pi 4 lying around.
• Because I’m working on getting my CKAD (Certified Kubernetes Application Developer) certification and thought it would be a great hands-on practice.
• I couldn’t find a good enough article that described how to install PiHole on Kubernetes. The majority did not go throught the whole procedure, were aimed for Docker/Swarm and Raspbian (Raspberry Pi flavored Linux distribution).
• I got tired of all the advertisements and popups on all the devices while surfing the web at home.

This post is here to explain how was able to deploy PiHole on Kubernetes and how I resolved some of the problems that occurred during the deployment process.

Introduction​

The other day when visiting my family, under a large pile of torn up binders and laminated documents, I found my sibling’s old 2013 MacBook Air. I thought it would be wasteful to just leave it there so I picked it up and took it to the lab, AKA home. I discovered that the laptop was password locked with my sibling’s user and password. Since it must’ve been laying at my family’s house for a few years at least, and we as human’s have a tendency to forget our credentials, I decided to save the attempts and just format it and start with a clean OS.

Introduction​

A few months ago, I received a highly-anticipated 2020 32GB, 2.3 GHz Quad-Core Intel Core i7 MacBook Pro. Highly-anticipated because I already had one stolen (a 2019 version) earlier last year in a robbery in an AirBnB apartment I was renting while I was staying in Barcelona. It was quite a dramatic story but I won’t get into the details. This is a tech blog after all.

In this tutorial we deploy a PostgresSQL database in Kubernetes cluster.

Introduction​

Today I received an escalation from one of our largest and most strategic customers. Over the weekend, the customer had ‘patched’ their 3 Ubuntu 18.04 nodes running Kubernetes 1.17. They were using glusterfs as their shared storage class.