Docker, Kubernetes & ArgoCD: Complete Guide

From Basics to Advanced with Interview Scenarios and Real-World Examples

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📚 Repository Structure

• 01-Kubernetes-Core-Concepts.md - Comprehensive guide covering Docker fundamentals through Kubernetes networking (Parts 1-4)

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📖 Table of Contents

PART 1: DOCKER FUNDAMENTALS & ADVANCED

1. Introduction to Containerization
2. Docker Architecture & Components
3. Docker Images & Dockerfile
4. Docker Containers Lifecycle
5. Docker Networking
6. Docker Volumes & Storage
7. Docker Compose
8. Multi-stage Builds & Optimization
9. Docker Security Best Practices
10. Docker Registry & Image Management

PART 2: KUBERNETES FUNDAMENTALS

11. What is Kubernetes?
12. Kubernetes Architecture
13. Control Plane Components
14. Node Components
15. Kubernetes Objects & API

PART 3: KUBERNETES WORKLOADS

16. Pods
17. ReplicaSets
18. Deployments
19. StatefulSets
20. DaemonSets
21. Jobs & CronJobs

PART 4: KUBERNETES NETWORKING

22. Services (ClusterIP, NodePort, LoadBalancer)
23. Ingress & Ingress Controllers
24. Network Policies
25. CNI Plugins (Calico, Cilium, Flannel)
26. DNS in Kubernetes
27. Service Mesh Fundamentals

PART 5: KUBERNETES CONFIGURATION & STORAGE

28. ConfigMaps
29. Secrets
30. Persistent Volumes (PV)
31. Persistent Volume Claims (PVC)
32. Storage Classes
33. StatefulSet Storage

PART 6: KUBERNETES SECURITY

34. RBAC (Role-Based Access Control)
35. Service Accounts
36. Pod Security Standards
37. Network Policies for Security
38. Admission Controllers
39. Security Contexts
40. Secrets Management (External Secrets, Vault)

PART 7: KUBERNETES SCALING & AUTOSCALING

41. Horizontal Pod Autoscaler (HPA)
42. Vertical Pod Autoscaler (VPA)
43. Cluster Autoscaler
44. KEDA (Kubernetes Event-Driven Autoscaling)

PART 8: KUBERNETES OBSERVABILITY

45. Logging (Fluentd, Fluent Bit, EFK Stack)
46. Monitoring (Prometheus, Grafana)
47. Metrics Server
48. Distributed Tracing (Jaeger, Zipkin)
49. Debugging Pods & Troubleshooting

PART 9: SERVICE MESH ADVANCED

50. Istio Architecture & Components
51. Linkerd Overview
52. Traffic Management
53. mTLS & Security in Service Mesh
54. Observability with Service Mesh
55. Canary Deployments with Istio

PART 10: ADVANCED DEPLOYMENT STRATEGIES

56. Rolling Updates
57. Blue-Green Deployments
58. Canary Deployments
59. A/B Testing
60. GitOps Principles

PART 11: ARGOCD BASICS TO ADVANCED

61. Introduction to GitOps
62. ArgoCD Architecture
63. Installing ArgoCD
64. Creating Applications in ArgoCD
65. App of Apps Pattern
66. Helm Integration with ArgoCD
67. Kustomize Integration
68. ApplicationSets
69. Sync Policies & Strategies
70. Progressive Delivery with ArgoCD Rollouts
71. Multi-cluster Management
72. ArgoCD Security & RBAC
73. ArgoCD Notifications & Webhooks
74. ArgoCD Best Practices

PART 12: PRODUCTION BEST PRACTICES

75. High Availability Clusters
76. Disaster Recovery & Backup (Velero)
77. Multi-cluster Strategies
78. Cost Optimization
79. Performance Tuning
80. Interview Preparation Tips

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🎯 Current Status

✅ Parts 1-4 - Fully documented with detailed explanations, examples, and interview scenarios
📋 Parts 5-12 - Outlined in table of contents (detailed content coming soon)

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🚀 Quick Start

1. Start with 01-Kubernetes-Core-Concepts.md for comprehensive Docker and Kubernetes fundamentals
2. Each section includes:
   • Detailed explanations
   • YAML configuration examples
   • Real-world scenarios
   • Interview preparation questions
   • Links to official documentation

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📝 About This Guide

This repository contains comprehensive notes covering Docker, Kubernetes, and ArgoCD from basics to advanced topics. The content is organized progressively, making it ideal for:

• Interview preparation
• Learning Kubernetes ecosystem
• Quick reference for DevOps engineers
• Understanding production best practices

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🔗 Useful Links

• Official Kubernetes Documentation
• Docker Documentation
• ArgoCD Documentation
• CNCF Cloud Native Interactive Landscape