The SRE series: add a worker node to Kubernetes

Photo by Diego Fernandez on Unsplash

Why the SRE (Site Reliability Engineering) series?

This article is a part of “the SRE series”, which will walk through the hands-on activities of Site Reliability Engineers. At the end of the SRE series, we will have installed a Kubernetes cluster with a micro-service running, ready to be used for Chaos Engineering Experiments and AiOps.

Pre-flight checks

If you still need to install a Kubernetes cluster, you can follow my last guide; here is the link:

Install Kubernetes 1.21.1 on Centos 8 Stream (includes fix CAP_PERFMON)

Attention point: during the last months, Kubernetes 1.23.x was released including the fix for the problem with CAP_PERMON, if you want to install directly Kubernetes 1.23, follow the small changes to the original guide:

a. in the section “Ready to start with the Installation?” need to change the following lines in step 1 of the guide:

VERSION=1.23
OS=CentOS_8_Stream (for CentOS_8_Stream)
or
VERSION=1.23
OS=CentOS_8 (for CentOS_8)