Virtualization

How to Configure HTPasswd Authentication on an OpenShift Cluster 0
- Best Practices & Patterns, Containers & Docker, DevOps Tools, Kubernetes, Security & Hardening, System Administration, Troubleshooting, Virtualization
- August 19, 2025
In this step-by-step guide, we will configure HTPasswd authentication on an existing OpenShift 4.15+ single-node cluster. We’ll create user accounts, update the cluster’s OAuth settings to use HTPasswd, and verify access via both the CLI and the web console. We’ll also cover how to assign admin privileges to a new user and remove the default kubeadmin user for security.
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Automate RHEL 9 and CentOS Stream 9 Installation on KVM Using Kickstart 0
- Infrastructure as Code, Job Automation, Linux Basics, Shell Scripting, System Administration, Virtualization, Web Servers
- July 23, 2025
Automating OS installations can save time and ensure consistency, especially when deploying multiple virtual machines. Kickstart is a tool from Red Hat that allows you to automate the installation of RHEL and its derivatives by providing a file with answers to all the installation prompts. In this guide, we’ll walk through a beginner-friendly step-by-step process to automate the installation of Red Hat Enterprise Linux 9 and CentOS Stream 9 on KVM using Kickstart. We assume you already have KVM (via libvirt/QEMU) installed and configured on your host system.
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Running DeepSeek on Linux: A Step-by-Step Guide 1
- AI, Linux Basics, System Administration, Virtualization, Web Servers
- June 12, 2025
This guide shows how to install and run DeepSeek on Ubuntu or RHEL/CentOS using the simplest methods (Docker or prebuilt binaries). You’ll learn to download the model, run a prompt, and verify output.
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Managing Storage Space in Your OpenShift Cluster 0
- CI/CD Pipelines, Cloud Platforms, Containers & Docker, DevOps Tools, Kubernetes, Linux Basics, System Administration, Virtualization
- June 10, 2025
Keeping disk pressure under control is a day-to-day chore for cluster admins. Left unchecked, old container images, completed builds, logs and stray volumes will quietly eat through node storage and the internal registry PVC, eventually triggering pod evictions or broken pushes. This post walks through a layered strategy for reclaiming and preventing waste—starting with the integrated image registry and ending with node-level log rotation.
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Docker 101: How to Run Your First Container on Ubuntu 0
- Cloud Platforms, Containers & Docker, DevOps Tools, Kubernetes, Linux Basics, System Administration, Virtualization
- June 10, 2025
Docker lets you “ship code faster, standardize application operations, [and] seamlessly move code” to different machines. Official docs also remind us that Docker Engine runs on 64-bit Ubuntu (22.04 LTS “Jammy” or newer), so the steps below apply to Ubuntu 22.04 and later.
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Configuring OpenShift as a Deployment Target from GitLab CI/CD 0
- CI/CD Pipelines, Configuration Management, Containers & Docker, DevOps Tools, Job Automation, Linux Basics, System Administration, Version Control (Git), Virtualization, Web Servers
- May 29, 2025
This content outlines the integration of GitLab CI/CD with OpenShift for deploying containerized applications. It discusses prerequisites, initial setup, service accounts, CI/CD variables, and pipeline configuration. Security best practices are emphasized to ensure safe deployment processes. An example demonstrates deploying a Node.js app, highlighting continuous delivery benefits.
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