Category Archives: Kubernetes

kubeadm kubelet Problem

Over the past year and a bit, I’ve been using kubeadm to build and upgrade my clusters starting with Kubernetes 1.14. I switched from the home grown scripts I’d initially created for the 1.2 installation and continued through 1.12 to … Continue reading

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Kubernetes Manual Upgrade to 1.18.8

Upgrading Kubernetes Clusters This documentation is intended to provide the manual process for upgrading the server Operating Systems, Kubernetes to 1.18.8, and any additional upgrades. 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 1.18.8

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 Preparation Steps For 1.18.8

Upgrading Kubernetes Clusters The purpose of the 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 Upgrade to 1.18.8

Upgrading Kubernetes Clusters The following lists what software and pods will be upgraded during this quarter. Upgrade the Operating System Upgrade Kubernetes Upgrade kudeadm, kubectl, and kubelet RPMs from 1.17.6 to 1.18.8. Upgrade kubernetes-cni RPM from 0.7.5-0 to 0.8.6-0. kube-apiserver … Continue reading

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Kubernetes Pod Schedule Prioritization

Introduction Currently Kubernetes is not configured to treat any pod as more or less important than any other pod with the exception of critical Kubernetes pods such as the kube-apiserver, kube-scheduler, and kube-controller-manager. Multiple products with different Service Class requirements … Continue reading

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Kubernetes Resource Management

Overview There are two objectives to Resource Management. Ensure sufficient resources are available for all deployed products and determine when additional resources are required. This document provides information based on the deployed Kubernetes cluster and is filtered for my specific … Continue reading

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Kubernetes WorkerNode Sizing

Overview For the current Kubernetes clusters, I reviewed several industry best practices and went with a Worker Node resource configuration of 4 CPUs and 16 Gigabytes of RAM per worker node. In addition, I have a spreadsheet that describes all … Continue reading

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