Sagar Jadhav

Backend Developer (Cloud ☁️) | Speaker | YouTuber | Blogger

What is Readiness & Liveness Probes in Kubernetes?

21 Jun 2020 » kubernetes

What is Readiness & Liveness Probes in Kubernetes?

Kubernetes uses Readiness & Liveness probes to manage pod lifecycle. Readiness probe is used to determine whether pod is ready to accept the traffic or not and liveness probe is used to determine whether pod is functioning properly or not. Read more about them here. In this blog I am adding readiness & liveness probe to PHPMyAdmin application.

Architecture

Architecture

Prerequisites:

Deploy PHPMyAdmin Application

Follow Deploy phpMyAdmin application on kubernetes blog

Go to session_4 directory

cd ../session_4/

Step 1: Delete PHPMyAdmin deployment

kubectl delete deployment phpmyadmin

Step 2: Deploy PHPMyAdmin deployment with Readiness & Liveness probes

kubectl create -f phpmyadmin-deployment.yaml
kubectl get pods --watch

Exit once pod goes into running state

Step 9: Browse phpmyadmin application

Go to browser and browse http://IP_ADDRESS:30030. Login with root user & test password

here IP_ADDRESS is the ip address of virtual machine where kubernetes is running.

Demo