Tag Archives: kubernetes

Silly but This Is a WordPress Blog Running on Kubernetes

You probably think it’s an overkill to use Kubernetes for a WordPress blog with less than a thousand monthly visitors. While this may be true, it’s totally worth using Kubernetes for the bragging rights. This is a WordPress blog running on Kubernetes!

Kubernetes running WordPress and MariaDB
Sources: https://pixabay.com/images/id-5718352/ and https://www.freepik.com/free-vector/cargo-freight-container_3795063.htm
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Ultimate Way of Installing Metrics Server for Production Kubernetes Clusters

Metrics are very important in your Kubernetes cluster because you need them to monitor the pod resource usage. You also need metrics to trigger an autoscale using an Horizontal Pod Autoscaler (HPA). Metrics Server provides CPU and memory metrics so you can see them in Kubernetes Dashboard’s fancy graphs.

Kubernetes dashboard showing CPU and memory metrics in graphs
CPU and memory metrics in Kubernetes Dashboard
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Provisioning Single-node Kubernetes Cluster using kubeadm on Ubuntu 20.04

There are many tools out there to provision single-node Kubernetes clusters but kubeadm is the way to go for a production-like set up. Although it is more difficult to create a cluster with kubeadm, with its configuration options you can tweak the cluster to your needs. By following this post you can easily create a Single-node Kubernetes Cluster using kubeadm on Ubuntu 20.04.

Command line output of kubectl showing the WordPress components on a Kubernetes cluster
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What’s the best Kubernetes distribution for local environments?

There are plenty of Kubernetes distributions available that can be used to install Kubernetes locally. They tend to use minimal resources which is ideal. Question is what’s the best Kubernetes distribution for local use?

Local Kubernetes Distributions

This post contains benchmarks and reviews of the following Kubernetes distributions:

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How I passed Certified Kubernetes Administrator exam

I started working with Kubernetes in 2018 (about 3 years ago). In 2019, I successfully migrated a production application into an AWS Elastic Kubernetes Service (EKS) cluster. I’ve been managing that cluster for more than 2 years. All this made me confident that it would be easy for me to pass Certified Kubernetes Administrator (CKA) exam.

Certified Kubernetes Administrator logo
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Single-node Kubernetes on Raspberry Pi

I’ve recently got a Raspberry Pi 4 Model B 8GB. I wanted to have one just to try running Kubernetes on Raspberry Pi. Most resources on the web seem to be for a huge cluster with a dozen nodes but I wanted to do it with a single node.

Picture of raspberry pi 4 with black case running
Raspberry Pi 4 Model B in its case

Operating system

As the operating system I chose  Ubuntu because of its Pi support even though I prefer Red Hat based distros.

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