DevOps
CI/CD pipelines, Docker, Kubernetes, and modern deployment practices.
19 articles
What Are SLI, SLO and SLA? A Guide to Service Reliability Metrics
Saying a service is "reliable" is not enough - you need to define it with measurable metrics. SLI (Service Level Indicator), SLO (Service Level Objective), and SLA (Service Level Agreement) are the building blocks of this measurement. Born from Google's Site Reliability Engineering (SRE) approach, t
Uptime Monitoring - Downtime Notification Automation with Alertmanager
Detecting that a website or API has gone down before your customers do is a cornerstone of operational reliability. Instead of manual checks, you can set up automated uptime monitoring to continuously run HTTP, TCP, and DNS health checks, and send instant Slack, PagerDuty, or email notifications via
What Is GitOps? Continuous Delivery to Kubernetes with ArgoCD
In traditional CI/CD pipelines, deploy commands are triggered externally and drift can occur between the cluster state and Git. GitOps treats the Git repository as the single source of truth, and ArgoCD continuously synchronizes this source with the Kubernetes cluster. This guide covers GitOps princ
Distributed Tracing with OpenTelemetry - Microservice Troubleshooting
In a microservice architecture, a single user request passes through multiple services, and latency or failure at any point affects the entire chain. Finding which service creates the bottleneck through traditional log analysis can take hours. With OpenTelemetry distributed tracing, you can track ea
Centralized Log Management with ELK Stack
Checking logs from multiple servers and applications one by one via SSH is inefficient and error-prone. With ELK Stack (Elasticsearch, Logstash, Kibana), you can collect, search, and visualize all your logs in a centralized location. This guide covers ELK architecture, Docker Compose setup, Logstash
Setting Up a Server Monitoring Stack with Prometheus + Grafana
Monitoring your servers' CPU, memory, disk, and network metrics in real time is the foundation of proactive issue detection. Prometheus handles metric collection and querying, while Grafana provides the visualization layer - together they form an excellent monitoring stack. This guide walks you thro
Creating a Disaster Recovery Plan with Infrastructure as Code
Server failures, data center outages, or cyber attacks can happen at any time. By defining your disaster recovery plan as code with Infrastructure as Code (IaC), you can recreate your infrastructure within minutes during a disaster. This guide covers everything from RPO/RTO concepts to Terraform mul
CI/CD in Monorepo Structure: Turborepo and GitHub Actions Integration
Managing multiple applications and packages in a single repository can turn into chaos without the right tools. Turborepo dramatically speeds up CI/CD processes in monorepo projects with its smart caching and task pipeline mechanism. This guide walks you through Turborepo setup, GitHub Actions integ
Blue-Green and Canary Deployment Strategies: Zero Downtime Updates
Users experiencing downtime during application updates is unacceptable. Blue-Green deployment switches instantly between two environments, while Canary deployment minimizes risk by routing a small percentage of traffic to the new version. This guide compares both strategies with Kubernetes and Nginx
Server Configuration Automation with Ansible: Writing Playbooks
Installing the same packages on dozens of servers, distributing configuration files, and restarting services takes hours when done manually via SSH, with high error risk. Ansible uses an agentless architecture to configure your servers over SSH with YAML-based playbooks. This guide covers inventory
Managing Cloud Infrastructure as Code with Terraform
Creating servers and network resources by clicking through a web panel carries serious risks for repeatability and auditability. Terraform is an open-source IaC tool that lets you define your infrastructure as code. This guide covers HCL syntax, state management, module structure, and production bes
Building a CI/CD Pipeline with GitHub Actions: Node.js Example
Manual testing and deployment processes are both slow and error-prone. GitHub Actions is a free CI/CD platform that automatically runs test, build, and deploy steps when code is pushed. This guide builds a complete pipeline for a Node.js application including testing, Docker image building, security
Multi-Tenant Environment Management with Kubernetes Namespaces
Sharing a single Kubernetes cluster among multiple teams, projects, or customers saves costs, but without isolation, security and resource conflicts are inevitable. Namespaces provide logical partitioning; ResourceQuota, LimitRange, NetworkPolicy, and RBAC make those partitions secure and controlled
Choosing a Container Registry: Docker Hub, GitHub Packages and Self-Hosted
Where you store your container images directly impacts security, cost, and CI/CD speed. Docker Hub's rate limits, GitHub Packages' CI integration, and self-hosted Harbor's full control advantage shine in different scenarios. This guide compares popular container registry options and provides criteri
What Is a Helm Chart? Standardizing Kubernetes Deployment
Kubernetes applications can consist of dozens of YAML files: Deployment, Service, ConfigMap, Secret, Ingress, and more. Managing these files separately for each environment (dev, staging, prod) is error-prone. Helm is a package manager for Kubernetes that bundles these YAML files into parameterized
Kubernetes HPA: Auto-Scaling Pods Under Load
Manually adjusting replica counts during traffic spikes is both slow and error-prone. Kubernetes Horizontal Pod Autoscaler (HPA) automatically scales Pod count up or down based on CPU usage, memory consumption, or custom metrics. This guide covers HPA configuration from scratch, Metrics Server setup
Docker Multi-Stage Build: Creating Production-Ready Images
Standard Dockerfiles typically include build tools, development dependencies, and unnecessary files in the final image. This bloats image size and expands the attack surface. Docker multi-stage build lets you define multiple stages in a single Dockerfile, copying only production-essential files into
Introduction to Kubernetes: Pod, Deployment and Service Concepts
Kubernetes (k8s) is an open-source orchestration platform that automates the deployment, scaling, and management of containers. According to the CNCF 2025 survey, 84% of organizations now run Kubernetes in production. This guide covers the fundamental building blocks of Kubernetes - Pod, Deployment,
Container Security: Scanning and Securing Docker Images
Containers simplify application deployment but misconfigured containers create serious security risks. According to Snyk's 2024 report, 75% of popular images on Docker Hub contain known vulnerabilities. This guide covers Docker image scanning, minimal base image usage, rootless containers, and runti