Sidecar Containers introduced in Kubernetes v1.28

sidecar-containers-kubernetes-v1.28.yaml

apiVersion: v1
kind: Pod
metadata:
  name: pod-with-sidecar-container
spec:
  initContainers:
    # Normal Init Container
  - name: database-initializer
    image: db-init:v1.34.0
    # Sidecar Container
  - name: custom-logstash-forwarder
    image: logstash:v1.20.0
    # This makes the Init Container as Sidecar Container
    restartPolicy: Always
  containers:
  - name: main-app
    image: my-java-app:latest
  restartPolicy: OnFailure