Multi-Cluster Kubernetes Platform

Problem Statement

The organization needed a unified platform to deploy workloads across multiple regions while maintaining consistency, security compliance, and sub-minute failover capabilities.

Solution

Designed and implemented a multi-cluster Kubernetes architecture using Rancher for cluster lifecycle management, ArgoCD for GitOps deployments, and Istio for cross-cluster service mesh connectivity. Automated cluster provisioning with Terraform and Cluster API.

Technology Stack

Challenges

• Managing state consistency across clusters during network partitions
• Implementing zero-downtime certificate rotation for mTLS
• Designing RBAC policies that work across cluster boundaries

Lessons Learned

• Start with a single well-documented golden cluster template before scaling
• GitOps pull-based deployments are essential for multi-cluster consistency
• Invest early in observability — cross-cluster debugging without unified tracing is painful