Kubernetes

Production-ready Kubernetes cluster setup, management, and migration guides based on real-world implementations.

Articles

K3s to Kubeadm Migration

Production cluster migration with zero downtime - complete guide with troubleshooting.

Topics covered:

• Pre-migration planning and backup strategies
• Step-by-step Kubeadm installation
• CNI migration (K3s Flannel → Cilium)
• Storage migration (local-path → Longhorn)
• Complete troubleshooting guide

Cluster Migration Strategy

Moving workloads to a new cluster safely and efficiently.

Topics covered:

• Cluster preparation and setup
• Workload migration strategies
• Data migration approaches
• Testing and validation

Key Topics

• Cluster Setup: Kubeadm installation, node configuration, CNI setup
• Migrations: K3s to Kubeadm, cluster-to-cluster migrations
• Networking: Cilium CNI, network policies, service mesh
• Storage: Longhorn distributed storage, PVC management
• Ingress: nginx-ingress, TLS/SSL, domain routing
• High Availability: Multi-master setup, etcd clustering
• Troubleshooting: Common issues and debugging techniques

Production Learnings

All guides are based on real production implementations on a 4-node Kubernetes cluster running critical workloads. Each article includes:

• ✅ Complete command sequences
• ✅ Troubleshooting sections
• ✅ Verification steps
• ✅ Rollback procedures
• ✅ Lessons learned