Category Archives: Kubernetes

Installing Kubernetes

Overview This article provides instructions in building the Kubernetes cluster using kubeadm and any post installation requirements. Build Cluster On the first control plane node run the kubeadm command. After the first node has been initialized, the connect strings will … Continue reading

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Preparing Kubernetes

Overview This article will provide a howto on preparing hosts to install Kubernetes 1.25.7 on CentOS 7 using kubeadm. I’ll be using CRI-O as the container environment and Calico for the network layer. A followup article will provide instructions in … Continue reading

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Kubernetes Storage

Overview This article provides some quick instructions on creating an NFS server for use as Persistent Storage in Kubernetes. A different article will discuss creating Persistent Storage. Firewall Configuration For the NFS server, it only will be accessed by Kubernetes … Continue reading

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Load Balancing Kubernetes

Overview This article provides instructions in how I set up my HAProxy servers (yes two) to provide access to the Kubernetes cluster. Configuration To emulate a production like environment, I’m configuring two HAProxy servers to provide access to the Kubernetes … Continue reading

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Kubernetes Index

Overview I keep trying to find documents and videos that do an installation of Kubernetes along with associated configurations and including ArgoCD for an environment like mine. This index shows the final Kubernetes installation (list of all pods) plus an … Continue reading

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Kubernetes Upgrade to 1.20.6

Upgrading Kubernetes Clusters The following lists what software and pods will be upgraded during this quarter. Upgrade the Operating System. Upgrade Kubernetes. Upgrade kubeadm, kubectl, and kubelet RPMs from 1.19.6 to 1.20.6. kube-apiserver is upgraded from 1.19.6 to 1.20.6 automatically. kube-controller-manager is … Continue reading

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Kubernetes Preparation Steps for 1.20.6

Upgrading Kubernetes Clusters The purpose of this document is to provide the background information on what is being upgraded, what versions, and the steps required to prepare for the upgrade itself. These steps are only done once. Once all these … Continue reading

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Kubernetes Manual Upgrade to 1.20.6

Upgrading Kubernetes Clusters This documentation is intended to provide the manual process for upgrading the server Operating Systems, Kubernetes to 1.20.6, and any additional updates. This provides example output and should help in troubleshooting should the automated processes experience a … Continue reading

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Kubernetes Ansible Upgrade to 1.20.6

Upgrading Kubernetes Clusters This document provides a guide to upgrading the Kubernetes clusters in the quickest manner. Much of the upgrade process can be done using Ansible Playbooks. There are a few processes that need to be done centrally on … Continue reading

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Kubernetes Delete an etcd Member

On the Kubernetes cluster, one of the etcd members had a falling out and is reporting the data is stale. While troubleshooting, we came up with several ideas including just rebuilding the cluster. It’s not all that hard overall but … Continue reading

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