Lab Information
The Nautilus DevOps team is planning to set up a Jenkins CI server to create/manage some deployment pipelines for some of the projects. They want to set up the Jenkins server on Kubernetes cluster. Below you can find more details about the task:
1) Create a namespace jenkins
2) Create a Service for jenkins deployment. Service name should be jenkins-service under jenkins namespace, type should be NodePort, nodePort should be 30008
3) Create a Jenkins Deployment under jenkins namespace, It should be name as jenkins-deployment , labels app should be jenkins , container name should be jenkins-container , use jenkins/jenkins image , containerPort should be 8080 and replicas count should be 1.
Make sure to wait for the pods to be in running state and make sure you are able to access the Jenkins login screen in the browser before hitting the Check button.
Note: The kubectl utility on jump_host has been configured to work with the kubernetes cluster.
Lab Solutions
Step 1: Create the Jenkins Namespace
kubectl create namespace jenkins
Step 2: Create the Jenkins Service
Create a YAML file for the NodePort service:
cat > jenkins-service.yaml << EOF
apiVersion: v1
kind: Service
metadata:
name: jenkins-service
namespace: jenkins
spec:
type: NodePort
selector:
app: jenkins
ports:
- protocol: TCP
port: 8080
targetPort: 8080
nodePort: 30008
EOF
Apply the service:
kubectl apply -f jenkins-service.yaml
Step 3: Create the Jenkins Deployment
Create a YAML file for the deployment:
cat > jenkins-deployment.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
name: jenkins-deployment
namespace: jenkins
spec:
replicas: 1
selector:
matchLabels:
app: jenkins
template:
metadata:
labels:
app: jenkins
spec:
containers:
- name: jenkins-container
image: jenkins/jenkins
ports:
- containerPort: 8080
EOF
Apply the deployment:
kubectl apply -f jenkins-deployment.yaml
Step 4: Monitor the Deployment Progress
Check the status of the pod:
kubectl get pods -n jenkins
Wait until the pod status shows Running. This might take a few minutes as the Jenkins image needs to be pulled and the container needs to start up.
You can also check the deployment status:
kubectl get deployment -n jenkins
Step 5: Verify Service Configuration
Check that the service is properly configured:
kubectl get svc -n jenkins
Step 7: Access Jenkins
Once the pod is in Running state, you can access Jenkins:
Step 8: Final Verification Commands
Run these commands to verify everything is set up correctly:
Check all resources in jenkins namespace
kubectl get all -n jenkins
Verify pod details
kubectl describe pod -l app=jenkins -n jenkins
Verify service details
kubectl describe svc jenkins-service -n jenkins
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