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Full-Stack DevOps & Kubernetes

Focused on sharing DevOps, Kubernetes, Linux, Docker, Istio, microservices, Spring Cloud, Python, Go, databases, Nginx, Tomcat, cloud computing, and related technologies.

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Latest from Full-Stack DevOps & Kubernetes

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Full-Stack DevOps & Kubernetes

Dec 6, 2024 · Operations

Boost Kubernetes API Server Performance: Tuning max-mutating-requests-inflight & watch-cache-size

This guide explains how to optimize Kubernetes API Server performance by configuring the max-mutating-requests-inflight limit and watch-cache-size, offering recommended values for different cluster sizes, monitoring metrics, and step‑by‑step adjustment strategies for stable, high‑throughput clusters.

API ServerCluster OperationsKubernetes

0 likes · 7 min read

Boost Kubernetes API Server Performance: Tuning max-mutating-requests-inflight & watch-cache-size

Full-Stack DevOps & Kubernetes

Nov 28, 2024 · Operations

20 Essential Linux & Kubernetes Troubleshooting Commands Every DevOps Engineer Should Know

This guide compiles the 20 most common Linux and Kubernetes troubleshooting commands, illustrating typical outputs and step‑by‑step diagnostic reasoning for high CPU load, disk pressure, network failures, pod crashes, node issues, service outages, database errors, and application performance problems.

KubernetesLinuxSystem Administration

0 likes · 15 min read

20 Essential Linux & Kubernetes Troubleshooting Commands Every DevOps Engineer Should Know

Full-Stack DevOps & Kubernetes

Nov 25, 2024 · Cloud Native

Why Does kube-scheduler Fail to Start? A Step‑by‑Step Fix

In a Kubernetes cluster the kube-scheduler pod may stay pending due to a container-name reservation conflict; this guide shows how to locate the offending container with ctr, delete it, restart kubelet, and verify that the pod returns to Running state.

CTRKubernetescontainerd

0 likes · 5 min read

Why Does kube-scheduler Fail to Start? A Step‑by‑Step Fix

Full-Stack DevOps & Kubernetes

Nov 21, 2024 · Cloud Native

How to Build Custom Apache Docker Images on RockyLinux and Alpine with Podman

This guide explains Dockerfile fundamentals, enumerates all major instructions, and provides step‑by‑step examples for creating minimal Apache (httpd) images on both RockyLinux and Alpine using Podman, including building, testing, tagging, and pushing to Docker Hub.

Container ImagePodmanRockyLinux

0 likes · 24 min read

How to Build Custom Apache Docker Images on RockyLinux and Alpine with Podman

Full-Stack DevOps & Kubernetes

Nov 11, 2024 · Cloud Native

How K3s Embedded Registry Enables Offline Image Sharing in Kubernetes Clusters

This article explains how K3s's new embedded container image feature lets Kubernetes nodes share OCI images peer‑to‑peer, eliminating external registry dependence and speeding up distribution in offline, low‑bandwidth, or geographically dispersed environments.

Cluster OperationsEmbedded RegistryK3s

0 likes · 8 min read

How K3s Embedded Registry Enables Offline Image Sharing in Kubernetes Clusters

Full-Stack DevOps & Kubernetes

Oct 9, 2024 · Operations

How to Fix Expired Kubernetes Certificates and Restore Your Cluster

When Kubernetes certificates expire, the cluster becomes unusable; this guide explains how to check certificate expiration, renew the affected certificates with kubeadm, verify the updates, and restart control‑plane components to bring the cluster back online, including HA considerations.

Cluster MaintenanceKubernetescertificates

0 likes · 7 min read

How to Fix Expired Kubernetes Certificates and Restore Your Cluster

Full-Stack DevOps & Kubernetes

Sep 23, 2024 · Operations

How to Supercharge Nginx for High‑Traffic Peaks: Config and Kernel Tuning

This guide explains how to optimize Nginx settings and adjust Linux kernel parameters—such as worker processes, connection limits, caching, HTTP/2, rate limiting, and TCP tweaks—to reliably handle massive traffic spikes while maintaining high availability and performance.

Linux kernelMonitoringNginx

0 likes · 8 min read

How to Supercharge Nginx for High‑Traffic Peaks: Config and Kernel Tuning

Full-Stack DevOps & Kubernetes

Sep 21, 2024 · Information Security

Essential Linux Hardening: Firewall, Permissions, Auditing, and IDS Guide

Learn how to secure a Linux server by configuring firewalls with iptables and firewalld, managing user permissions, setting up auditd, applying automatic updates, and deploying intrusion detection tools like OSSEC and AIDE, plus a step‑by‑step response workflow for real‑world attack scenarios.

IDSLinuxSecurity

0 likes · 8 min read

Essential Linux Hardening: Firewall, Permissions, Auditing, and IDS Guide

Full-Stack DevOps & Kubernetes

Sep 13, 2024 · Operations

Diagnosing and Resolving Server Memory Spikes: Tools, Causes, and Fixes

This guide explains how to monitor memory usage on Linux servers, identify common causes of sudden memory consumption such as leaks, stuck processes, or high load, and provides concrete commands and remediation steps to stabilize system performance.

LinuxShell Commandsperformance-monitoring

0 likes · 9 min read

Diagnosing and Resolving Server Memory Spikes: Tools, Causes, and Fixes

Full-Stack DevOps & Kubernetes

Sep 9, 2024 · Cloud Native

Optimizing Network and Storage for 5,000‑Node Kubernetes Clusters

This guide outlines practical strategies for designing and optimizing network and storage in Kubernetes clusters of over 5,000 nodes, covering overlay networks, IP pool segmentation, bandwidth allocation, load balancing, security policies, distributed storage options, performance tuning, and reliable backup solutions.

Cloud NativeIP PoolKubernetes

0 likes · 9 min read

Optimizing Network and Storage for 5,000‑Node Kubernetes Clusters