Category Archives: Computers

Gitlab Runners

Overview This article provides local configuration details specific to the site. Links to the relevant documentation will also be provided. Description The gitlab-runner is a tool that uses the .gitlab-ci.yml file to build, test, and deploy to the target host. … Continue reading

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Resize KVM Images

Overview In order to properly support the environment, one set of images will be retrieved from the Red Hat OpenShift reference site for Debian, Ubuntu, and CentOS. These images will then be modified in order to support the necessary installations. … Continue reading

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Docker Best Practices

Use the Official Docker Image for your Base Image. Download the image from the docker.io site. Never use the Latest tag for an image. In order for consistency, identify the version you want to use. This also prevents potentially breaking … Continue reading

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Replacing An OKD Master

I’m running an OKD4 (aka an upstream Red Hat OpenShift Container Platform v4) cluster at home. Recently my bldr0cuomokdmst1 master node crapped out. I couldn’t even log in to determine the problem. For my current Kubernetes clusters, I’m casting the … Continue reading

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Sequential Updates

Say you want to upgrade all the servers. Straight yum upgrade or apt update. For example, in my inventory, I have servers grouped by OS. If I wanted to patch all the CentOS boxes sequentially, I’d run: For a Debian … Continue reading

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Homelab 2021

It’s that time again. It’s a year later and there have been quite a few changes in the Homelab. With the release of VMware 7, I needed to replace my servers with something a bit more current. I repurposed one … Continue reading

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Installing OKD4

Overview What I’m trying to accomplish here is to set up a homelab OpenShift type environment. I’m installing OKD4.7 in this case but OKD is an upstream of the Red Hat OpenShift so should be just fine for my use-case. … Continue reading

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LACP, Bonding, Bridges, and VLAN Tagging

Overview This article provides some brief information on setting up bonded interfaces in Linux, configuring Link Aggregation Control Protocol (LACP), and then setting up tagged VLANs. Many times there’s an assumption of knowledge. This article provides some background and resources … Continue reading

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Ansible Patterns

Overview One of the cool things with Ansible are Patterns. With Patterns, you can combine entries in your inventory file. Instead of having a bunch of tags specific to each site, you can instead have a list of servers in … 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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