CKAD — Multi-Container Pods
Chapter Overview
Most Pods run a single container. But sometimes you need containers that work closely together — sharing network, storage, and lifecycle. That is where multi-container Pods come in.
Multi-container Pods are a key CKAD topic under the Application Design and Build domain (20%). You need to know the design patterns, when to use each, and how to debug them.
This chapter is split into focused sub-topics so you can master each pattern independently.
What You’ll Learn
| # | Topic | Description |
|---|---|---|
| 1 | Why Multi-Container Pods | When and why to use multiple containers in a single Pod |
| 2 | Sidecar Pattern | Log shippers, proxies, config reloaders — extending the main container |
| 3 | Init Containers | Setup tasks that run before the main container starts |
| 4 | Ambassador Pattern | Proxy containers that simplify external service communication |
| 5 | Adapter Pattern | Transforming container output for external systems |
| 6 | Managing Multi-Container Pods | Logs, exec, debugging, and kubectl commands for multi-container Pods |
| 7 | Hands-On Lab & Practice | End-to-end labs and exam-style questions with answers |
CKAD Exam Relevance
This chapter maps to the Application Design and Build domain:
- Understand multi-container Pod design patterns (sidecar, init, ambassador, adapter)
- Choose and use the right workload resource
- Use shared volumes between containers
Weight: ~20% of the exam score.
Prerequisites
- Completed Pod Design Patterns chapter
- Understanding of Ephemeral Volumes (emptyDir)
- A working
kubectlsetup (local or cloud)
