Exposing Apps with Services
Understand the role of Services in providing stable network endpoints for Pods.
Pods: Here Today, Gone Tomorrow
In Kubernetes, Pods are the smallest deployable units. They are designed to be temporary and can be created, destroyed, or moved by Kubernetes at any time.
This flexibility is great for resilience, but it creates a challenge: How do other applications reliably find and communicate with these ever-changing Pods?
The Moving Target Problem
Every Pod gets its own IP address. When a Pod restarts or scales, it often gets a new IP address. Directly connecting to a Pod's IP is like trying to hit a moving target!
Imagine a web application with multiple Pods. If one Pod restarts, its IP changes, breaking connections from other services or users.
All lessons in this course
- Exposing Apps with Services
- Service Types: ClusterIP, NodePort, LoadBalancer
- Ingress for External Access
- DNS and Service Discovery