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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

100 recent articles max

Full-Stack DevOps & Kubernetes

Apr 11, 2023 · Cloud Native

Master Kubernetes Basics: Deploy, Scale, and Update Apps with Simple Commands

This article introduces Kubernetes as an open‑source container orchestration platform, explains its core objects like Pods, Services, ReplicaSets, and Deployments, clarifies its relationship with Docker, and provides a step‑by‑step example covering deployment, exposure, scaling, rolling updates, and rollback using kubectl commands.

Container OrchestrationDevOpsKubernetes

0 likes · 5 min read

Master Kubernetes Basics: Deploy, Scale, and Update Apps with Simple Commands

Full-Stack DevOps & Kubernetes

Apr 6, 2023 · Fundamentals

Master Essential Linux Commands: From Basics to Advanced Operations

This guide introduces the most commonly used Linux command‑line tools, covering basic commands such as pwd, ls, cd, mkdir, rm, cp, mv and advanced utilities like grep, ps, top, tar, wget, curl, ssh, and scp, with examples and usage tips.

LinuxShellSystem Administration

0 likes · 6 min read

Master Essential Linux Commands: From Basics to Advanced Operations

Full-Stack DevOps & Kubernetes

Apr 5, 2023 · Cloud Native

Enable GPU Acceleration in Kubernetes with NVIDIA Device Plugin

This guide explains how to set up NVIDIA drivers, install the NVIDIA device plugin, and create a Kubernetes pod that requests GPU resources, providing step‑by‑step commands and a sample YAML manifest for GPU‑enabled workloads.

Cloud NativeContainer OrchestrationDevice Plugin

0 likes · 4 min read

Enable GPU Acceleration in Kubernetes with NVIDIA Device Plugin

Full-Stack DevOps & Kubernetes

Jan 30, 2023 · Cloud Native

Fix Calico Node Not Ready: BGP Not Established Error in Kubernetes

This guide explains why a Calico pod shows "BIRD is not ready: BGP not established" in a Kubernetes cluster, identifies the missing node interface detection as the root cause, and provides step‑by‑step instructions to adjust the IP autodetection method and restore pod health.

BGPCalicocloud-native

0 likes · 6 min read

Fix Calico Node Not Ready: BGP Not Established Error in Kubernetes

Full-Stack DevOps & Kubernetes

Jan 7, 2023 · Operations

How to Fix Expired Kubernetes Certificates with kubeadm

This guide shows how to check certificate expiration in a Kubernetes cluster, renew all certificates using kubeadm, and verify the renewal, helping you resolve the “certificate has expired or is not yet valid” error.

Kubernetescertificatecloud-native

0 likes · 7 min read

How to Fix Expired Kubernetes Certificates with kubeadm

Full-Stack DevOps & Kubernetes

Dec 13, 2022 · Operations

How to Configure Jenkins to Pull Code from GitLab via SSH

This guide explains how to set up SSH keys on Jenkins and a GitLab repository so Jenkins can securely pull code, detailing the required public‑key addition to the repo, private‑key credential configuration in Jenkins, and a test job to verify the pull.

CI/CDDevOpsGitLab

0 likes · 3 min read

How to Configure Jenkins to Pull Code from GitLab via SSH

Full-Stack DevOps & Kubernetes

Dec 10, 2022 · Cloud Native

Why Kubernetes Pods Fail with “Too Many Open Files” and How to Fix It

The article explains the “Too many open files” error in Kubernetes, clarifies that it refers to exceeding system file‑handle limits, shows how to inspect current usage with ulimit and lsof, and provides step‑by‑step commands to temporarily or permanently raise the limits and troubleshoot the application code.

DevOpsKubernetesToo many open files

0 likes · 5 min read

Why Kubernetes Pods Fail with “Too Many Open Files” and How to Fix It

Full-Stack DevOps & Kubernetes

Dec 7, 2022 · Cloud Native

How to Scale Kubernetes to 5,000 Nodes: Master, API Server, and Component Tuning

This guide explains how to push a Kubernetes cluster toward its theoretical limit of 5,000 nodes by detailing official limits, master node sizing for GCE and AWS, kube‑apiserver high‑availability and connection‑count tuning, scheduler and controller‑manager leader election settings, kubelet optimizations, and DNS anti‑affinity configuration.

Cloud NativeKubernetesOperations

0 likes · 6 min read

How to Scale Kubernetes to 5,000 Nodes: Master, API Server, and Component Tuning

Full-Stack DevOps & Kubernetes

Nov 18, 2022 · Cloud Native

Top 10 Common Kubernetes Issues and How to Fix Them

This guide walks through ten frequent Kubernetes problems—from service access failures and port‑mapping errors to image pull issues and CrashLoopBackOff—explaining root causes, showing exact error messages, and providing concise command‑line solutions to restore cluster health.

DevOpsKubernetescloud-native

0 likes · 6 min read

Top 10 Common Kubernetes Issues and How to Fix Them

Full-Stack DevOps & Kubernetes

Oct 24, 2022 · Cloud Native

GitOps on Kubernetes: Secure, Scalable Continuous Deployment Best Practices

GitOps, a cloud‑native continuous deployment approach that uses Git as the single source of truth, enables secure, auditable, and multi‑tenant Kubernetes management by automating state reconciliation, supporting multi‑cluster and multi‑environment deployments, and integrating tools like Argo CD, Flux, Helm, and Kustomize.

Argo CDContinuous DeploymentDevOps

0 likes · 12 min read

GitOps on Kubernetes: Secure, Scalable Continuous Deployment Best Practices