Certified Kubernetes Application Developer (CKAD) Study Notes

Building Container Images

Multi-stage builds and image optimization

Stage	Purpose	Example Base
Build	Compile/package application	golang:1.21, node:18
Final	Minimal runtime image	scratch, distroless, alpine

Use COPY --from=builder /app/binary /app/binary to copy only the compiled artifact into the final stage.

Pattern	Purpose	Example
Sidecar	Extend/enhance main container	Log shipper, proxy
Init Container	Setup before main starts	DB migration, config fetch
Adapter	Normalize output	Metrics format converter
Ambassador	Proxy external access	Database proxy

Practice what you just read

10 free practice questions. No credit card.

Practice what you just read

10 free practice questions. No credit card.

Building Container Images

Multi-stage builds and image optimization

Stage	Purpose	Example Base
Build	Compile/package application	golang:1.21, node:18
Final	Minimal runtime image	scratch, distroless, alpine

Use COPY --from=builder /app/binary /app/binary to copy only the compiled artifact into the final stage.

Pattern	Purpose	Example
Sidecar	Extend/enhance main container	Log shipper, proxy
Init Container	Setup before main starts	DB migration, config fetch
Adapter	Normalize output	Metrics format converter
Ambassador	Proxy external access	Database proxy

Practice what you just read

10 free practice questions. No credit card.