beginner~4h
Networking I: Services, Service Discovery & DNS
Pod IPs are inherently unstable -- Pods are created and destroyed constantly. A Service is a stable virtual IP and DNS name that load-balances traffic across a dynamically-changing set of backing Pods
Learning objectives
- Explain precisely what problem a Service solves, given that Pod IPs change every time a Pod is recreated.
- Distinguish ClusterIP, NodePort, and LoadBalancer Service types by what each one actually exposes and to whom.
- Explain how Kubernetes' internal DNS lets a Service be reached by a stable, human-readable name.
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Networking I: Services, Service Discovery & DNS