Deploy Selenium-Grid version 4 in Azure Kubernetes Cluster

This article outlines Deploying a selenium grid in one of the cloud services, ex Azure Cloud. I always find articles on setting selenium-grid up on the local m/c with minikube (local Kubernetes version) which is not always a real use case, hence thought of putting all information I gathered into one place as a self notes on how to set up selenium grid on Azure Kubernetes cluster from scratch and run the wdio test on this new selenium grid setup.

To set up a selenium grid over azure infrastructure need to understand the below concepts at a basic level at least.

Pre-requisite

• Azure Fundamentals with Azure account ( i used my free trial account)
• Knowledge on selenium-hub
• Basic knowledge of Azure Kubernetes

High-level Steps

1. Create AKS cluster with Virtual Nodes
2. Connect to the cluster via Azure CLI or Kubectl from the local pc terminal or azure cloud shell
3. Create Selenium-Hub
4. Create Service for Selenium-Hub in order to allow external traffic
5. Create Selenium nodes (chrome, firefox, edge)
6. Run Selenium tests on grid setup

1. Create AKS cluster:

After login to Azure Portal with your account, Create a Kubernetes cluster by following the screenshots and finding details I have entered in the Azure classic portal view

You can provide any values

Resource Group: Create new - > rg-ak8-se

Kuberentes cluster name: ak8-cluster-se-hub

2. Connect to aks cluster from terminal

Open command prompt or terminal and login to the Azure subscription

az login        

You will see like below on successful login to your account

Now we need to connect to the cluster in order to deploy our applications (selenium-hub and nodes), execute the below command by replacing your resource group and cluster name given in previous steps

az aks get-credentials --resource-group rg-ak8-se --name aks-cluster-se-hub        

You will see output like below if succuss

3. Create Selenium-Hub

Now we create a selenium-hub deployment using a YAML file like the below command.

kubectl create -f selenium-hub-deployment.yaml
        

You should see something like below

4. Create Service for Selenium-Hub in order to allow external traffic

kubectl create -f selenium-hub-svc.yaml        

Run the below command to get the grid external IP address

kubectl get services        

Now you can check the grid ui at http://yourExternalIPAddress:4444/grid/console

5. Create Selenium nodes (chrome or firefox or edge)

kubectl create -f selenium-node-chrome-deployment.yaml        

Now you can see below 2 chrome nodes registered to your hub ( i have added only 2 replicas in my config file above)

Creating firefox nodes

6. Run tests on the grid setup

Now let's run simple webdriverIO tests on our grid setup

make dir and create the below package file ( assuming node setup is there in your system)

make changes to the below test as per your selenium grid ip config

Now run the tests like below ( my tests are in wdio dir)

npm install
npm run test