Focused on sharing DevOps, Kubernetes, Linux, Docker, Istio, microservices, Spring Cloud, Python, Go, databases, Nginx, Tomcat, cloud computing, and related technologies.
This guide introduces the most commonly used Linux command‑line tools for file handling, content viewing, system monitoring, networking, and permission management, providing clear examples and options to help users quickly become proficient in everyday Linux administration tasks.
This guide explains why Dockerhub mirrors stopped working, lists the unavailable and usable registry URLs, and shows step‑by‑step how to configure Docker with multiple mirror sources to ensure reliable image pulls.
This article explains how to configure Kubernetes Horizontal Pod Autoscaler (HPA) for automatic pod scaling, covering core concepts, metric selection, and two detailed YAML examples that demonstrate scaling based on CPU utilization and custom data‑processing rates.
This guide introduces Rancher as an open‑source container management platform and outlines step‑by‑step how to install Rancher, create clusters, add nodes, deploy applications, monitor resources, and manage user permissions for Kubernetes environments.
This article provides a comprehensive overview of Kubernetes, detailing its fundamental concepts, master‑worker architecture, networking model, security mechanisms, extensibility via custom resources, and an in‑depth examination of key source‑code modules such as kube‑apiserver, etcd, controller‑manager, scheduler, kubelet, and kube‑proxy, with links to the official repository.
This guide walks through building a Go number‑guessing game, containerizing it with Docker, pushing the image, and deploying the application to a Kubernetes cluster using a Deployment manifest, then verifying and running the game inside the pod.
Learn the critical Kubernetes security measures for production environments, including RBAC access control, network policies, secret management, continuous monitoring, patch updates, API server hardening, Kubelet protection, pod security policies, and container hardening techniques, each illustrated with practical YAML examples and command snippets.
This article explains how Jenkins and Kubernetes can be integrated to build a fully automated CI/CD pipeline, using Google’s real‑world implementation as a step‑by‑step example that covers installation, configuration, pipeline scripting, Docker image handling, and Kubernetes deployment.
This guide explains why Prometheus is ideal for Kubernetes monitoring, walks through installing Prometheus, configuring targets and alerts, deploying Alertmanager and Grafana via Helm, and demonstrates testing alerts with load generation, providing complete code snippets and visual results.
The US Air Force’s U‑2 reconnaissance aircraft has adopted a Jenkins‑driven CI/CD pipeline orchestrated by Kubernetes, enabling automated builds, repeatable deployments, rapid threat response, enhanced security, and resource savings, with a detailed step‑by‑step case study illustrating code management, pipeline configuration, container deployment, testing, and RBAC controls.
