Jenkins-Kubernetes

###STEP 1###
# https://www.jeffgeerling.com/blog/2019/expanding-k8s-pvs-eks-on-aws

We will be creating storage.yaml

vim storage.yaml

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: standard
provisioner: kubernetes.io/aws-ebs
allowVolumeExpansion: true
parameters:
  type: gp2
  zones: us-west-2a, us-west-2b, us-west-2c

---> kubectl apply -f storage.yml

###STEP 2###
We will be creating volume.yaml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: jenkins-storage
  labels:
    app: jenkins
spec:
  storageClassName: standard
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 20Gi

---> kubectl apply -f volume.yaml
#Note: In case if you want to attach an existing volume or a backup of a volume remove --->requests and add mentioned below.
#https://medium.com/pablo-perez/launching-a-pod-with-an-existing-ebs-volume-mounted-in-k8s-7b5506fa7fa3

volumes:
  awsElasticBlockStore:
    volumeID: vol-0b402cb854e070fad
    
---> This entry will be done deployments <--- ---> In STEP 3    
  
  
###STEP 3###
https://www.blazemeter.com/blog/how-to-setup-scalable-jenkins-on-top-of-a-kubernetes-cluster

We will be creating jenkins.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: jenkins
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: jenkins
    spec:
      containers:
        - name: jenkins
          image: jenkins/jenkins:2.176.1
          securityContext:
            runAsUser: 0
          env:
            - name: JAVA_OPTS
              value: -Djenkins.install.runSetupWizard=true
          ports:
            - name: http-port
              containerPort: 8080
            - name: jnlp-port
              containerPort: 50000
          volumeMounts:
            - name: jenkins-home
              mountPath: "/var/jenkins_home"
      volumes:
        - name: jenkins-home
          persistentVolumeClaim:
            claimName: jenkins-storage

---> kubectl apply -f jenkins.yaml


###STEP 4###
https://devopscube.com/setup-jenkins-on-kubernetes-cluster/

We will be creating jenkins-service.yaml

apiVersion: v1
kind: Service
metadata:
  name: jenkins
spec:
  type: LoadBalancer
  ports:
    - port: 80
      targetPort: 8080
  selector:
    app: jenkins

---> kubectl apply -f jenkins-service.yaml

---> ### Persistent Storage ###

kubectl get persistentVolumes