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Learn Kubernetes: A Deep Dive

Multi-Container Pod Example: Init Container

Explore how to define and deploy multi-container pods using init containers in Kubernetes. Understand the sequence where an init container runs first to check service readiness before the main application container starts. Gain practical skills in managing pod status and applying commands to monitor deployment.

We'll cover the following...

Introduction to an init container

The following YAML defines a multi-container Pod with an init container and main app container. 

apiVersion: v1
kind: Service
metadata:
  name: k8sbook
spec:
  selector:
    app: initializer
  ports:
    - port: 80
      targetPort: 8080
  type: ClusterIP
Playground

Defining a container under the spec.initContainers block makes it an init container that Kubernetes guarantees will run and complete before regular containers.

Regular app containers are defined ...