Introduction How to Set Up Open-iSCSI on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 9. This […]
Introduction How to Set Up borgbackup on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 9. This […]
How to Install containerd as a Container Runtime on RHEL 7 containerd is a high-performance, industry-standard container runtime that serves as the foundation beneath both Docker and Kubernetes. When Kubernetes deprecated the Dockershim in version 1.20 and removed it in version 1.24, containerd became the most widely adopted direct container runtime for Kubernetes clusters. Installing […]
How to Monitor Kubernetes with Prometheus and Grafana on RHEL 7 Operating a Kubernetes cluster without monitoring is like running a production database without logs — you will only know something is wrong after an outage has already started. Prometheus is the de facto standard for Kubernetes metrics collection, using a pull-based model where it […]
Introduction How to Configure Btrfs File System on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 9. […]
How to Install ArgoCD on Kubernetes on RHEL 7 ArgoCD is a declarative, GitOps-based continuous delivery tool for Kubernetes. The core principle of GitOps is that the desired state of your cluster is stored in a Git repository, and a controller continuously reconciles the live cluster state against that desired state. ArgoCD monitors your Git […]
Introduction Deploying set up drbd block replication on debian 9 on a Debian 9 Stretch machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Before […]
How to Configure Kubernetes RBAC on RHEL 7 Role-Based Access Control (RBAC) is the standard authorization mechanism in Kubernetes, allowing administrators to define precisely which users, groups, and service accounts can perform which actions on which resources. Without RBAC, any authenticated user could potentially read secrets, delete deployments, or escalate their privileges across namespaces. On […]
Introduction This guide explains how to Configure ZFS on Debian 9 on Debian 9 Stretch. Debian Stretch uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 9 install with the standard repositories […]
How to Set Up Kubernetes Ingress with Nginx Ingress Controller on RHEL 7 Kubernetes Ingress provides a powerful way to expose HTTP and HTTPS routes from outside the cluster to services running inside it. Rather than creating a separate LoadBalancer service for every application, an Ingress resource lets you define routing rules in one place, […]
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