Setup Selenium Grid using Kubernetes

Setup Selenium Grid using Kubernetes

• Prerequisite: Kubernetes is installed along with minikube if you are running in your local.
• Create Deployment: To create a Kubernetes deployment for Selenium Hub, create a new YAML file with the below content.

seleniumdeployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: selenium-hub
spec:
  selector:
    matchLabels:
      app: selenium-hub
  strategy: 
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0      
  template:
    metadata:
      labels:
        app: selenium-hub
    spec:
      containers:
      - name: selenium-hub
        image: selenium/hub:3.141.59-20200326
        resources:
          limits:
            memory: "128Mi"
            cpu: "500m"
        ports:
          - containerPort: 4444
        livenessProbe:
            httpGet:
              path: /wd/hub/status
              port: 4444
            initialDelaySeconds: 30
            timeoutSeconds: 5


and run the command
kubectl create -f seleniumdeployment.yaml

• Create Service: To create a service for the Selenium Hub deployment, create a new YAML file with the below content.

seleniumservice.yaml

apiVersion: v1
kind: Service
metadata:
  name: selenium-service
  labels:
    app: selenium-service
spec:
  selector:
    app: selenium-hub
  ports:
  - port: 4444
    nodePort: 30001
  type: NodePort


and run the command
kubectl create -f seleniumservice.yaml

• Create Selenium Node Replication Controller: To create the Selenium Nodes using Replication Controller, create a new YAML file with the below content.

seleniumnodesrc.yaml

apiVersion: v1
kind: ReplicationController
metadata:
  name: selenium-nodes
spec:
  replicas: 2
  selector:
    app: selenium-chrome
  template:
    metadata:
      name: selenium-chrome
      labels:
        app: selenium-chrome
    spec:
      containers:
        - name: node-chrome-debug
          image: selenium/node-chrome-debug:3.141.59-20200409
          ports:
            - containerPort: 5555
          env:
            - name: HUB_HOST
              value: "selenium-service"
            - name: HUB_PORT
              value: "4444"


and run the command
kubectl create -f seleniumnodesrc.yaml

• Get Service URL: If you are using minikube, you can use this command to get the URL of your selenium hub
minikube service selenium-service --url

• View Minikube Dashboard: To view minikube dashboard, run the command
minikube dashboard

• Delete All: To delete the selenium hub, nodes, and the service, run the below commands
kubectl delete rc selenium-nodes

  kubectl delete deployment selenium-hub
  kubectl delete svc selenium-service