Category Archives: Computers

Backing Up A vCenter Appliance

It’s actually built into the 6.5 vCenter Appliance where you can back up the server data. Log in to https://appliance:5480 and under Summary select Backup. Couple of interesting tips as I proceeded though. Backup logs are located in /var/log/vmware/applmgmt as … Continue reading

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Upgrading VMware vCenter

I’m upgrading my VMware cluster to support VMware 7. Currently I’m running 6.5 on three older Dell R710’s and a Dell R410. I’ve rebuilt the R410 to run Ubuntu and run KVM on it as it’s a different VM management … Continue reading

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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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FreeIPA/Red Hat IDM

I’m working on bringing my 100+ servers under FreeIPA, aka a centralized Identity Management system. Since FreeIPA is an upstream source for Red Hat IDM, I added it to the title. Installing FreeIPA on servers is bog simple. Run Then … 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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