DevOps Day 0 Roadmap: Prerequisites

efore diving into Kubernetes, ensure you have foundational knowledge in:

1. Operating Systems:

• Linux: Basic commands, file systems, package management, process management
• Windows: Optional for Windows-based nodes

2. Networking:

• TCP/IP, DNS, HTTP/HTTPS
• Load Balancers, Firewalls, VPNs
• Subnetting, Network Protocols

3. Infrastructure:

• Virtualization: VMs, Hypervisors (ESXi, Hyper-V)
• Cloud Platforms: AWS, Azure, GCP
• Bare Metal Concepts

4. Storage:

• Block vs. Object vs. File Storage
• Persistent Volumes (PVs), Persistent Volume Claims (PVCs)
• NAS, SAN, SSD vs. HDD

5. Databases:

• SQL vs. NoSQL, ACID Properties
• Data Modeling, Scalability
• Backup and Restore (Disaster Recovery)

6. Security:

• Authentication, Authorization, Encryption
• Role-Based Access Control (RBAC)
• OWASP Top 10, Compliance (GDPR, HIPAA)

7. Caching and Replication:

• In-memory caches: Redis, Memcached
• Cache Strategies: Write-through, Write-back
• Data Replication: Master-Slave, Asynchronous vs. Synchronous

??? Core Kubernetes Learning Roadmap

1. Understand Containerization:

• Learn Docker: Basic commands, Dockerfiles, images, containers, volumes
• Explore Container Orchestration Concepts: Why Kubernetes?

2. Kubernetes Fundamentals:

• Architecture Overview:Control Plane (API Server, Controller Manager, Scheduler)Worker Nodes (Kubelet, Kube-proxy, Pods)
• Key Concepts:Pods, Services, Deployments, ConfigMaps, Secrets

3. Deploy Your First Application:

• YAML Basics: Writing Kubernetes manifests
• Deploy a Simple App: Use kubectl to deploy and manage applications

4. Workload Management:

• Controllers: Deployments, StatefulSets, DaemonSets
• Scaling: Horizontal Pod Autoscaler (HPA), Vertical Pod Autoscaler (VPA)
• Jobs & CronJobs: For batch processing and scheduled tasks

5. Kubernetes Networking:

• Services: ClusterIP, NodePort, LoadBalancer
• Ingress: Managing external access
• CNI Plugins: Calico, Flannel, Cilium

6. Persistent Storage:

• Volumes and Claims: PVs, PVCs
• Storage Classes: Dynamic provisioning

7. Security Best Practices:

• RBAC: Managing permissions
• Pod Security Policies: Restricting behavior
• Network Policies: Control traffic flow

8. Observability and Troubleshooting:

• Monitoring: Prometheus, Grafana
• Logging: Fluentd, EFK Stack
• Distributed Tracing: OpenTelemetry, Jaeger

9. Advanced Topics:

• Helm Charts: Simplify app deployment
• Custom Resource Definitions (CRDs): Extend Kubernetes functionality
• Service Meshes: Istio, Linkerd for advanced networking

?? Continuous Learning and Practice:

• Hands-on Labs: Minikube, Kind, Kubernetes Playground
• Deploy Real Applications: Practice with different architectures
• Engage with the Community: Join Kubernetes Slack, forums, and attend KubeCon events

This roadmap ensures you have a solid foundation and a clear path toward mastering Kubernetes. Enjoy your learning journey! ????