Deploy Jenkins on Kubernetes KodeKloud Engineer

Question : 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 namespace jenkins

2) Create a Service for jenkins deployment. Service name should be jenkins-service under jenkins namespace, type should be NodePort, targetport should be 8080 and 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 image, containerPort should be 8080 and replicas count should be 1.

Make sure to wait for pods to be in running state before clicking on Finish button.

Please Note :-  Perform the below commands based on your question  server,  user name & other details might differ . So please read task carefully before executing. All the Best 👍

Solution:  

1. At first  kubectl  utility configure and working from jump server, run below commands   

thor@jump_host ~$ kubectl get namespace NAME                 STATUS   AGE default              Active   2m42s kube-node-lease      Active   2m45s kube-public          Active   2m45s kube-system          Active   2m46s local-path-storage   Active   2m29s thor@jump_host ~$ thor@jump_host ~$ kubectl get service NAME         TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE kubernetes   ClusterIP   10.96.0.1    <none>        443/TCP   2m59s thor@jump_host ~$

   2.  Create namespace as per the task request.

thor@jump_host ~$ kubectl create namespace  jenkins namespace/jenkins created thor@jump_host ~$ thor@jump_host ~$ kubectl get namespace NAME                 STATUS   AGE default              Active   4m9s jenkins              Active   3s kube-node-lease      Active   4m12s kube-public          Active   4m12s kube-system          Active   4m13s local-path-storage   Active   3m56s thor@jump_host ~$

    

3.  Create  jenkins yaml  file with all the parameters 

        ( Refer Below Video for more clarity )

thor@jump_host ~$ vi /tmp/jenkins.yaml thor@jump_host ~$ cat /tmp/jenkins.yaml apiVersion: v1 kind: Service metadata:   name: jenkins-service   namespace: jenkins spec:   type: NodePort   selector:     app: jenkins   ports:     - port: 8080       targetPort: 8080       nodePort: 30008 --- apiVersion: apps/v1 kind: Deployment metadata:   name: jenkins-deployment   namespace: jenkins   labels:     app: jenkins spec:   replicas: 1   selector:     matchLabels:       app: jenkins   template:     metadata:       labels:         app: jenkins     spec:       containers:         - name: jenkins-container           image: jenkins/jenkins           ports:             - containerPort: 8080 thor@jump_host ~$

4.  Run the below command to create a pod

thor@jump_host ~$ kubectl create -f /tmp/jenkins.yaml service/jenkins-service created deployment.apps/jenkins-deployment created thor@jump_host ~$

 5. Wait for deployment & pods to get running status

    

thor@jump_host ~$ kubectl get deploy -n jenkins NAME                 READY   UP-TO-DATE   AVAILABLE   AGE jenkins-deployment   1/1     1            1           6m48s thor@jump_host ~$ thor@jump_host ~$ kubectl get pods -n jenkins NAME                                  READY   STATUS    RESTARTS   AGE jenkins-deployment-6b6c78f968-27gpz   1/1     Running   0          2m9s thor@jump_host ~$ kubectl get service  -n jenkins NAME              TYPE       CLUSTER-IP     EXTERNAL-IP   PORT(S)          AGE jenkins-service   NodePort   10.96.93.208   <none>        8080:30008/TCP   37s thor@jump_host ~$

6. Validate the task by curl or open the browser by clicking 'Open Port on Host 1'

thor@jump_host ~$ kubectl exec jenkins-deployment-6b6c78f968-27gpz -n jenkins -- curl http://localhost:8080   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current                                  Dload  Upload   Total   Spent    Left  Speed   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0<html><head><meta http-equiv='refresh' content='1;url=/login?from=%2F'/><script>window.location.replace('/login?from=%2F');</script></head><body style='background-color:white; color:white;'>     Authentication required <!-- -->   </body></html>                                                                                                                                                                                                                                                                                100   541  100   541    0     0    772      0 --:--:-- --:--:-- --:--:--   772 thor@jump_host ~$

7.  Click on Finish & Confirm to complete the task successful

Happy Learning!!!!

Apart from this if you need more clarity,  I have made a  tutorial video on this , please go through and share your comments. Like and share the knowledge