Understanding Kubernetes Init Container&Static Pod— A Beginner’s Guide

Why do we need Static Pods?

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In this beginner-friendly guide, we will explore the concept of static pods, init container, their significance compared to regular pods, how they work, their key features, and provide an example to solidify your understanding.

Check out “Understanding Kubernetes — A Beginner’s Guide” for the comprehensive series🚀

A Beginner’s Guide to Kubernetes

What is Static Pods?

In a Kubernetes cluster, pods are the smallest and simplest units that can be deployed and managed.

Typically, pods are created and managed by the Kubernetes API server, which is part of the control plane.

However, there is another type of pod called “Static Pods” that are managed directly by the kubelet on a node, without the involvement of the API server.

for more details, please refer this article:

Understanding Kubernetes Static Pod — A Beginner’s Guide

Init Containers

Init containers are special containers that run and complete before the main application containers start in a pod.

They are used for performing setup tasks, such as data population, configuration, or pre-processing, before the actual application containers start running.

Init containers are defined in the spec section of a pod and are executed in the order they are defined.

apiVersion: v1
kind: Pod
metadata:
  name: pod-with-init-containers
spec:
  initContainers:
  - name: init-service
    image: busybox
    command: ["sh", "-c", "echo waiting for service; sleep 4"]
  - name: init-database
    image: busybox…