Build Production-Grade HA Clusters: 3 Control Planes, HAProxy, etcd, Cilium CNI & Real Failover Testing [2025]

What you'll learn
- Build a production-grade 6-node Kubernetes High Availability cluster from scratch using kubeadm
- Configure HAProxy load balancer to distribute Kubernetes API traffic across multiple control planes
- Set up centralized DNS server (BIND9) for efficient cluster name resolution
- Implement LVM storage strategy for Kubernetes components with future expansion capability
- Install and configure containerd runtime with systemd cgroup driver for Kubernetes v1.32
- Deploy Cilium CNI with eBPF technology for advanced pod networking
- Configure three control plane nodes with etcd cluster achieving quorum (3/3)
- Understand etcd Raft consensus protocol and how it maintains cluster state

Requirements
- Basic understanding of Kubernetes concepts (pods, services, deployments, namespaces)
- Linux command line proficiency (Ubuntu/Debian environment preferred)
- Basic networking knowledge (TCP/IP, DNS concepts, load balancing fundamentals)

Description
Master Production-Grade Kubernetes High Availability Architecture from Zero to Hero

Are you tired of toy Kubernetes setups that don't reflect real production environments? Ready to build enterprise-grade clusters that can survive node failures without downtime?

This comprehensive hands-on course takes you through building a complete 6-node Kubernetes High Availability cluster using kubeadm - the same architecture used by Fortune 500 companies.

What Makes This Course Different?

✓ Real Production Architecture: Build a true HA cluster with 3 control planes, 2 workers, and HAProxy load balancer

✓ Complete Infrastructure Setup: Configure centralized DNS (BIND9), load balancing, and LVM storage from scratch

✓ Every Command Shown: Watch real terminal sessions with actual outputs - no skipped steps

✓ Failover Testing: Intentionally break the cluster and watch it survive - prove your HA works!

✓ Enterprise Best Practices: Learn why professionals make specific architectural decisions

Your Complete 6-Node Cluster:

- 3 Control Plane nodes (cp01, cp02, cp03) - Full redundancy

- 2 Worker nodes (worker01, worker02) - Application workloads

- 1 HAProxy node - Load balancing + DNS server

- etcd cluster (Quorum 3/3) - Distributed data store

- Cilium CNI with eBPF - Advanced networking

- Complete failover capability

What You'll Build (8 Hands-On Videos):

Video 1:Architecture Deep Dive

→ Understand HA Kubernetes architecture with detailed diagrams

→ Learn why centralized DNS eliminates /etc/hosts maintenance

→ Discover LVM storage strategy for future expansion

→ See how all components interact in HA mode

Video 2:Infrastructure Foundation

→ Install and configure BIND9 DNS server

→ Setup HAProxy for API load balancing

→ Configure health checks and statistics interface

→ Test DNS resolution and load balancer readiness

Video 3:Node Preparation (All 5 Kubernetes Nodes)

→ Configure DNS resolution on all nodes

→ Setup LVM with dedicated Kubernetes storage

→ Disable swap and configure kernel parameters

→ Install containerd, kubeadm, kubelet, kubectl

→ Prepare nodes for cluster formation

Video 4:Control Plane Cluster Initialization

→ Create kubeadm HA configuration file

→ Initialize first control plane (cp01)

→ Join second control plane (cp02)

→ Join third control plane (cp03)

→ Verify etcd quorum (3/3 members)

→ Optimize kubelet for HA architecture

Video 5:Cilium CNI Deployment

→ Install Helm 3 package manager

→ Add Cilium Helm repository

→ Deploy Cilium with complete configuration

→ Configure IPAM and networking

→ Verify all nodes become Ready

Video 6:Adding Worker Nodes

→ Join worker01 to cluster

→ Join worker02 to cluster

→ Add worker role labels

→ Verify pod distribution across workers

→ Confirm complete cluster topology

Video 7:High Availability Failover Testing

→ Deploy test application across workers

→ Simulate control plane failure

→ Observe HAProxy automatic failover

→ Verify cluster remains operational

→ Test application availability during outage

→ Recover failed node

→ Validate cluster health restoration

Video 8:etcd Backup and Disaster Recovery

→ Install etcdctl and etcdutl tools

→ Create complete etcd snapshot

→ Verify snapshot integrity

→ Understand backup strategy

→ Implement production backup procedures

Technical Environment:

- Kubernetes v1.32.11 (latest stable)

- Ubuntu 22.04 LTS

- containerd 1.7.28

- Cilium 1.16.1 (eBPF networking)

- HAProxy 2.4+

- BIND9 DNS

- Helm 3.19+

- Node specs: 4 vCPU, 4GB RAM each

Who Should Take This Course?

✓ DevOps Engineers building production Kubernetes infrastructure

✓ System Administrators moving to container orchestration

✓ Platform Engineers responsible for Kubernetes clusters

✓ Site Reliability Engineers (SREs) ensuring high availability

✓ Cloud Architects designing resilient systems

✓ Anyone preparing for CKA (Certified Kubernetes Administrator)

Prerequisites:

- Basic Kubernetes knowledge (pods, services, deployments)

- Linux command line experience (Ubuntu/Debian)

- Basic networking concepts (TCP/IP, DNS, load balancing)

- Access to 6 VMs (4GB RAM, 2 vCPU each) or cloud resources

- Docker/container familiarity helpful but not required

Enroll Now and Master Production Kubernetes HA!

Build the skills companies are desperately seeking. Stop deploying fragile single-master clusters. Start building enterprise-grade, highly available Kubernetes infrastructure today!

Who this course is for:
- DevOps Engineers building and managing production Kubernetes infrastructure
- System Administrators transitioning from traditional infrastructure to container orchestration
- Platform Engineers responsible for designing and maintaining Kubernetes platforms
- Site Reliability Engineers (SREs) implementing high availability and disaster recovery
- IT Professionals preparing for Certified Kubernetes Administrator (CKA) certification
- Technical Leads evaluating Kubernetes for enterprise adoption
More Info