etcd: The Cluster Brain
Understand etcd's role as Kubernetes' distributed state store — Raft consensus, backup strategies, and performance considerations.
Full content coming soon. This lesson is being written.
This lesson covers etcd in depth:
- Raft consensus algorithm explained simply
- How Kubernetes uses the etcd watch API for real-time updates
- etcd cluster sizing (3 vs 5 nodes, HA trade-offs)
- Backup and restore procedures (
etcdctl snapshot) - Performance tuning: disk I/O, memory, defragmentation
- Common etcd failure scenarios and recovery
Check back soon for the full content.