Docker & Kubernetes

Docker Compose Build: Custom Images & Multi-Stage Builds

Learn how to build custom Docker images with Compose using Dockerfiles, multi-stage builds for smaller images, and build arguments for environment-specific configurations.

Docker Compose Tutorial — Multi-Container Applications

Docker Compose tutorial — define and run multi-container Docker applications with services, networks, volumes, and environment variables using docker-compose.yml

Docker Networking Explained — Bridge, Host, Overlay

Docker networking explained — bridge networks, host mode, overlay networks, port publishing, DNS resolution, and how containers communicate

Docker Volumes and Data Persistence Explained

Docker volumes explained — named volumes, bind mounts, tmpfs mounts, data persistence patterns, and backups for stateful containers

Docker Best Practices for Production

Docker production best practices — secure images, minimal footprint, health checks, logging, resource limits, and deployment patterns

Docker Compose Production: Reverse Proxy, SSL & Scaling

Learn how to run Docker Compose in production with Nginx reverse proxy, automatic SSL certificates via Let Encrypt, and horizontal service scaling.

Docker Compose Troubleshooting: Common Errors & Fixes

Learn how to diagnose and fix common Docker Compose errors including port conflicts, volume permission issues, network timeouts, and container startup failures.

Kubernetes Pods Explained — The Atomic Unit of K8s

Kubernetes pods explained — what pods are, containers in a pod, pod lifecycle, init containers, probes, and multi-container pod patterns

Kubernetes Services and Networking — Complete Guide

Kubernetes services explained — ClusterIP, NodePort, LoadBalancer, Ingress, DNS-based service discovery, network policies, and how pods communicate

Kubernetes ConfigMaps and Secrets — Complete Guide

Kubernetes ConfigMaps and Secrets explained — storing configuration, environment variables, mounted files, and managing sensitive data in Kubernetes

Kubernetes Monitoring with Prometheus and Grafana

Kubernetes monitoring tutorial — set up Prometheus and Grafana, collect metrics, create dashboards, set up alerts, and monitor cluster health

Docker and Kubernetes Security Best Practices

Docker and Kubernetes security guide — image scanning, RBAC, network policies, pod security, secrets management, and securing the container supply chain

Kubernetes Namespaces and RBAC — Multi-Tenant Clusters

Kubernetes namespaces and RBAC explained — organizing clusters with namespaces, resource quotas, role-based access control, and multi-tenant patterns

CI/CD with Docker and Kubernetes — Complete Pipeline

CI/CD pipeline with Docker and Kubernetes — build Docker images, push to registry, deploy to Kubernetes, and automate with GitHub Actions

Docker Networking Deep Dive — Networks, DNS, and Traffic Control

Docker networking explained: bridge, host, overlay, macvlan, and ipvlan network drivers, service discovery via DNS, port publishing, and multi-host networking with Swarm.

Docker Restart Policies & Health Checks — Keep Containers Running

Docker restart policies and health checks: always, unless-stopped, on-failure, and no policies, plus HEALTHCHECK instruction, start period, and container recovery automation.

Docker Resource Limits — CPU, Memory, and I/O Constraints Guide

Docker resource limits explained: CPU shares and quotas, memory limits with OOM handling, block I/O throttling, kernel memory constraints, and cgroups v2 configuration.

Kubernetes Pod Lifecycle Guide — From Pending to Running

Kubernetes pod lifecycle explained: states (Pending, Running, Succeeded, Failed, Unknown), container statuses, init containers, readiness and liveness probes, and pod termination flow.

Kubernetes HPA & VPA Guide — Autoscaling Workloads

Kubernetes HPA (Horizontal Pod Autoscaler) and VPA (Vertical Pod Autoscaler): metrics-based scaling, custom metrics, resource recommendations, and production autoscaling strategies.

Kubernetes Scheduling Guide — Pod Placement Control

Kubernetes scheduling explained: scheduler workflow, node selection, taints and tolerations, node affinity, pod affinity and anti-affinity, topology spread constraints, and custom schedulers.

Kubernetes Service Mesh Guide — Istio, Linkerd, and Traffic Management

Kubernetes service mesh guide: Istio and Linkerd architecture, sidecar proxy injection, traffic routing, mTLS, observability with telemetry, and production deployment patterns.

Kubernetes Operators Guide — Automating Application Management

Kubernetes Operators guide: custom controllers that manage complex applications using the operator pattern, CRDs, reconciliation loops, Helm-based and Go-based operators with kubebuilder.

Kubernetes CRDs Guide — Custom Resource Definitions

Kubernetes Custom Resource Definitions (CRDs): extending the Kubernetes API with custom resources, validation schemas, subresources, conversion webhooks, and versioning strategies.

Kubernetes Storage Classes Guide — Dynamic Provisioning

Kubernetes Storage Classes guide: dynamic volume provisioning, provisioner types (EBS, EFS, GCE PD), reclaim policies, volume binding modes, allowed topologies, and custom StorageClass configuration.

Kubernetes Network Policies Guide — Traffic Isolation

Kubernetes Network Policies: pod-level firewall rules controlling ingress and egress traffic, namespace isolation, allow/deny rules, policy types, and CNI plugin requirements.

Kubernetes Security Contexts Guide — Pod and Container Security

Kubernetes Security Contexts guide: runAsUser, runAsGroup, fsGroup, SELinux, seccomp, AppArmor, capabilities, privilege escalation, and PodSecurity admission for container security hardening.

Kubernetes Priority & Preemption — Critical Workloads First

Kubernetes priority classes and preemption: scheduling critical pods before others, evicting lower-priority workloads, PriorityClass configuration, default priority, and best practices.

Kubernetes StatefulSets Guide — Stateful Application Management

Kubernetes StatefulSets for stateful workloads: stable pod identity, ordinal indexing, persistent storage per pod, headless services, rolling updates, and graceful scaling for databases.

Kubernetes Service Accounts Guide — Pod Identity and Access

Kubernetes Service Accounts guide: pod identity for API access, token management, automount control, RBAC binding, workload identity with cloud IAM, and production patterns.

Kubernetes Metrics Server Guide — Resource Metrics Collection

Kubernetes Metrics Server guide: kubectl top, resource metrics pipeline, horizontal pod autoscaling, Kubelet cAdvisor integration, cluster monitoring, and production configuration.

Kubernetes API Server Request Flow — Authentication to Persistence

Kubernetes API server request flow: authentication, authorization, admission controllers, validation, object persistence to etcd, and response handling from kubectl and service accounts.

What is Docker? A Complete Beginner's Guide to Containers

Learn what Docker is, how containers differ from virtual machines, and why containerization revolutionizes software development and deployment workflows.

Docker vs Virtual Machines: Key Differences Explained for Developers

Learn the key differences between Docker containers and virtual machines including resource usage, startup time, isolation levels, and use cases for each.

Docker Architecture -- Containerd, runc, Images, and Layers Explained

Learn Docker architecture including the Docker daemon, containerd, runc, images, layers, registries, and how these components work together to run containers.

Docker Installation Guide: Install Docker Engine on Linux, macOS, and Windows

Learn how to install Docker Engine on Linux, macOS, and Windows. Configure the daemon, manage Docker as a non-root user, and verify your installation.

Docker Commands Cheatsheet -- The Only Docker CLI Reference You Need

Learn essential Docker commands for managing containers, images, volumes, and networks with practical examples and common operation patterns for daily use.

Dockerfile Tutorial -- Writing Your First Dockerfile with Working Examples

Learn to write Dockerfiles from scratch including FROM, RUN, COPY, CMD, ENTRYPOINT, WORKDIR, and EXPOSE instructions with working examples and best practices.

Docker Layer Caching -- Speeding Up Builds with Smart Cache Strategies

Learn Docker layer caching strategies to speed up builds. Understand cache invalidation, layer ordering, multi-stage builds, and cache mount optimization.

Docker Images Guide -- Pulling, Pushing, Tagging, and Managing Images

Learn Docker image management including pulling, pushing, tagging, listing, and removing images. Understand image layers, manifests, and storage efficiency.

Docker Multi-Stage Builds -- Optimize Images for Production Deployments

Learn Docker multi-stage builds to create smaller, more secure production images by separating build and runtime environments within a single Dockerfile.

Docker BuildKit -- Faster and More Secure Container Image Builds

Learn Docker BuildKit features including parallel builds, cache mounts, SSH agent forwarding, and secret mounting for faster and more secure image building.

Docker Registry -- Deploying and Managing a Private Container Registry

Learn to deploy and manage a private Docker registry for storing and distributing container images within your organization or CI/CD pipeline securely.

Docker Hub Management -- Automated Builds, Teams, and Repository Webhooks

Learn Docker Hub best practices including automated builds, organization management, repository webhooks, team access control, and image vulnerability scanning.

Docker Image Tagging -- Semantic Versioning, Latest Tag, and Multi-Arch Manifests

Learn Docker image tagging strategies including semantic versioning, latest tag pitfalls, multi-architecture manifest tags, and production deployment workflows.

Docker Image Security Scanning -- Vulnerability Detection with Trivy and Snyk

Learn Docker image security scanning with Docker Scout, Trivy, and Snyk. Detect vulnerabilities, fix critical issues, and enforce image policy compliance.

Docker Compose Overview -- Multi-Container Applications Made Simple

Learn Docker Compose for defining and running multi-container applications with a single YAML file covering services, networks, volumes, and dependencies.

Docker Compose YAML -- Services, Networks, and Volumes Configuration

Learn Docker Compose YAML syntax including service definitions, image config, port mapping, environment variables, and dependency management between services.

Docker Compose Networks -- Custom Networks, DNS, and Service Discovery

Learn Docker Compose networking including custom networks, DNS resolution, service discovery, and connecting to external networks across multiple projects.

Docker Compose Volumes -- Persistent Data and Bind Mounts for Services

Learn Docker Compose volumes for persistent data management including named volumes, bind mounts, volume drivers, and data sharing between multiple services.

Docker Compose Environment Variables -- .env Files and Variable Substitution

Learn Docker Compose environment variable management with .env files, env_file directives, and variable substitution in docker-compose.yml configurations.

Docker Compose Healthchecks -- Container Dependencies and Startup Ordering

Learn Docker Compose healthchecks for container dependency management, startup ordering, and ensuring service readiness before establishing connections.

Docker Compose Profiles -- Dev, Staging, and Production Environment Variants

Learn Docker Compose profiles to define service variants for development, staging, and production environments within a single compose file configuration.

What is Kubernetes? A Complete Beginner's Guide to Container Orchestration

Learn what Kubernetes is, how it orchestrates containers at scale, and why it is the standard platform for cloud-native application deployment worldwide.

Kubernetes Architecture -- Control Plane, Worker Nodes, and Core Components

Learn Kubernetes architecture including control plane components, worker nodes, etcd, kube-apiserver, scheduler, controller-manager, and kubelet in detail.

Kubernetes Setup -- Install Minikube, Kind, and kubeadm for Local Clusters

Learn to set up a local Kubernetes cluster using Minikube, Kind, and kubeadm for development, testing, and mastering Kubernetes fundamentals hands-on.

kubectl Commands -- The Complete Kubernetes CLI Reference for Beginners

Learn essential kubectl commands for managing Kubernetes resources including get, describe, logs, exec, apply, delete, port-forward, and rollout operations.

Kubernetes Objects -- Pods, Deployments, Services, and ConfigMaps Explained

Learn Kubernetes objects including Pods, Deployments, Services, ConfigMaps, Secrets, and Namespaces with declarative YAML manifest examples for beginners.

Kubernetes Namespaces -- Multi-Tenant Isolation, Resource Quotas, and RBAC

Learn Kubernetes namespaces for multi-tenant isolation, resource quotas, environment separation, and access control across teams and projects in clusters.

Kubernetes API -- API Groups, Resource Types, Versioning, and Authentication

Learn how the Kubernetes API works including API groups, resource types, versioning strategies, authentication, authorization, and admission control flows.

Kubernetes Pods -- The Atomic Unit of Container Orchestration Explained

Learn Kubernetes Pods as the smallest deployable unit including multi-container pods, init containers, resource requests, probes, and lifecycle management.

Kubernetes Deployments -- Rolling Updates, Scaling, and Rollback Strategies

Learn Kubernetes Deployments for declarative updates with rolling update strategies, horizontal scaling, rollback, and blue-green deployment patterns.

Kubernetes StatefulSets -- Stateful Applications with Stable Network Identities

Learn Kubernetes StatefulSets for stateful applications with stable network identities, ordered startup and shutdown, and persistent storage per pod instance.

Kubernetes DaemonSets -- Running Pods on Every Node for Logging and Monitoring

Learn Kubernetes DaemonSets for deploying node-level agents including log collectors, monitoring daemons, network proxies, and node-level scheduled operations.

Kubernetes Jobs and CronJobs -- Batch Processing and Scheduled Task Execution

Learn Kubernetes Jobs for batch processing and CronJobs for scheduled tasks. Understand parallelism, backoff limits, TTL cleanup, and concurrency policies.

Kubernetes Horizontal Pod Autoscaling -- CPU, Memory, and Custom Metrics

Learn Kubernetes Horizontal Pod Autoscaling based on CPU, memory, and custom metrics with target utilization, scaling policies, and stability windows.

Kubernetes Resource Management -- Requests, Limits, Quotas, and QoS Classes

Learn Kubernetes resource management including requests, limits, quotas, limit ranges, and Quality of Service classes for efficient workload scheduling.

Kubernetes Services -- ClusterIP, NodePort, LoadBalancer, and ExternalName

Learn Kubernetes Service types including ClusterIP for internal traffic, NodePort for external access, LoadBalancer for cloud LBs, and ExternalName for DNS.

Kubernetes Ingress -- HTTP Routing, TLS Termination, and Path-Based Rules

Learn Kubernetes Ingress for HTTP and HTTPS routing to Services. Configure path-based and host-based rules with TLS termination and ingress controller setup.

Kubernetes DNS and Service Discovery -- CoreDNS and Pod DNS Records Explained

Learn Kubernetes DNS and service discovery with CoreDNS including pod DNS records, custom policies, debugging issues, and DNS architecture in clusters.

Kubernetes Network Policies -- Pod-Level Firewall Rules and Traffic Isolation

Learn Kubernetes Network Policies for pod-level traffic control. Define ingress and egress rules using pod selectors, namespace selectors, and IP CIDR blocks.

Kubernetes CNI Plugins -- Calico, Flannel, Cilium, and Weave Compared

Learn Kubernetes CNI plugins including Calico, Flannel, Cilium, and Weave for pod networking, network policies, encryption, and production performance tuning.

Kubernetes Service Mesh -- Istio, Linkerd, and Traffic Management Patterns

Learn Kubernetes service mesh patterns with Istio, Linkerd, and Consul for mTLS, traffic splitting, observability, circuit breaking, and resilience patterns.

Kubernetes Gateway API -- Next-Generation Ingress with Role-Oriented Routing

Learn Kubernetes Gateway API as a next-generation ingress alternative with role-oriented routing, cross-namespace references, and backend traffic management.

Kubernetes Persistent Volumes -- Storage Classes, PVCs, and Dynamic Provisioning

Learn Kubernetes storage with PersistentVolumes, PersistentVolumeClaims, StorageClasses, and dynamic provisioning for production stateful workloads in clusters.

Kubernetes Storage Classes -- Dynamic Provisioning with AWS EBS, GCE PD, and NFS

Learn Kubernetes StorageClasses for dynamic PV provisioning with major cloud providers like AWS EBS, GCE PD, Azure Disk, and on-premises NFS storage backends.

Kubernetes ConfigMaps -- Environment Variables, Volumes, and Configuration Data

Learn Kubernetes ConfigMaps for managing non-sensitive configuration as environment variables, volume mounts, and command-line arguments in application Pods.

Kubernetes Secrets -- Managing Passwords, Tokens, and Keys with Encryption

Learn Kubernetes Secrets for managing sensitive data including Opaque secrets, KMS encryption, etcd encryption, and secure secret delivery to application Pods.

Kubernetes Volume Claims -- Access Modes, Snapshots, Resizing, and CSI Drivers

Learn Kubernetes volume management including access modes, volume expansion, snapshots, CSI driver integration, and data cloning for persistent workloads.

Kubernetes Backup and Disaster Recovery -- Velero and etcd Backup Guide

Learn Kubernetes backup and disaster recovery with Velero including PV snapshots, cluster state backup, cross-cluster migration, and restore procedures.

Kubernetes Security Contexts -- Pod and Container Security with SELinux and seccomp

Learn Kubernetes security contexts for Pod and container-level security including user IDs, SELinux, capabilities, seccomp profiles, and AppArmor policies.

CI/CD with Docker and Kubernetes -- Building and Deploying Pipelines

Learn CI/CD pipelines with Docker and Kubernetes using GitHub Actions for automated builds, image scanning, Helm deployments, and rolling update strategies.

Helm Charts Tutorial -- The Kubernetes Package Manager for Production Deployments

Learn Helm charts for packaging and deploying Kubernetes applications including chart structure, templates, values, dependencies, and release management.

Kubernetes Kustomize -- Declarative Configuration Management Without Templates

Learn Kustomize for Kubernetes configuration management using overlays, patches, generators, and environment-specific customizations without templates.

Argo CD -- GitOps Continuous Delivery for Kubernetes Application Deployments

Learn Argo CD for GitOps-based Kubernetes deployment with automated sync, drift detection, multi-cluster management, and application health monitoring features.

Kubernetes Monitoring with Prometheus and Grafana -- Metrics and Dashboards

Learn Kubernetes monitoring with Prometheus and Grafana including ServiceMonitors, metrics collection, custom dashboards, alerting rules, and visualization.

Kubernetes Troubleshooting -- Debugging Pods, Networking, and Cluster Issues

Learn Kubernetes troubleshooting techniques for debugging Pod failures, networking issues, resource constraints, and control plane problems in clusters.