Kubernetes

Requisitos

-minikube
-kubectl
-virtualBox

jenkins-deployment.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: jenkins-slave
spec:
  replicas: 1
  template:
    metadata:
      labels:
        name: jenkins-slave
    spec:
      containers:
      - name: jenkins-slave
        image: jenkins-slave
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 22

jenkins-service.yaml

apiVersion: v1
kind: Service
metadata:
  name: jenkins-slave
spec:
  type: LoadBalancer
  ports:
  - name: http
    port: 22
    targetPort: 22
  selector:
    name: jenkins-slave

Iniciar minikube

MacBook-Pro-de-Andres:~ kaox$ minikube start
Starting local Kubernetes cluster…
Starting VM…
SSH-ing files into VM…
Setting up certs…
Starting cluster components…
Connecting to cluster…
Setting up kubeconfig…
Kubectl is now configured to use the cluster.
MacBook-Pro-de-Andres:~ kaox$ eval $(minikube docker-env)

Kubectl

MacBook-Pro-de-Andres:k8s kaox$ kubectl create -f jenkins-deployment.yaml 
deployment "jenkins-slave" created
MacBook-Pro-de-Andres:k8s kaox$  kubectl describe deployment jenkins-slave
Name:   jenkins-slave
Namespace:  default
CreationTimestamp: Thu, 15 Jun 2017 10:29:49 -0500
Labels:   name=jenkins-slave
Annotations:  deployment.kubernetes.io/revision=1
Selector:  name=jenkins-slave
Replicas:  1 desired | 1 updated | 1 total | 1 available | 0 unavailable
StrategyType:  RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 1 max unavailable, 1 max surge
Pod Template:
  Labels: name=jenkins-slave
  Containers:
   jenkins-slave:
    Image:  jenkins-slave
    Port:  22/TCP
    Environment: <none>
    Mounts:  <none>
  Volumes:  <none>
Conditions:
  Type  Status Reason
  ----  ------ ------
  Available  True MinimumReplicasAvailable
OldReplicaSets: <none>
NewReplicaSet: jenkins-slave-2908820577 (1/1 replicas created)
Events:
  FirstSeen LastSeen Count From   SubObjectPath Type  Reason   Message
  --------- -------- ----- ----   ------------- -------- ------   -------
  49s  49s  1 deployment-controller   Normal  ScalingReplicaSet Scaled up replica set jenkins-slave-2908820577 to 1
MacBook-Pro-de-Andres:k8s kaox$ kubectl get pods
NAME                             READY     STATUS    RESTARTS   AGE
jenkins-slave-2908820577-7v987   1/1       Running   0          5m
MacBook-Pro-de-Andres:k8s kaox$ kubectl scale deployment jenkins-slave --replicas=3
deployment "jenkins-slave" scaled
MacBook-Pro-de-Andres:k8s kaox$ kubectl get pods
NAME                             READY     STATUS    RESTARTS   AGE
jenkins-slave-2908820577-7v987   1/1       Running   0          38m
jenkins-slave-2908820577-83dk3   1/1       Running   0          7s
jenkins-slave-2908820577-x1ljs   1/1       Running   0          7s
user@k8s-master-AC381188-0:~/tmp$ kubectl expose deployment/jenkins-master --type=LoadBalancer
service "jenkins-master" exposed
user@k8s-master-AC381188-0:~/tmp$ kubectl get services
NAME             CLUSTER-IP    EXTERNAL-IP    PORT(S)          AGE
jenkins-master   XXXXXXXXXXX   XXXXXXXXXXXX   8080:32241/TCP   13m
kubernetes       10.0.0.1      <none>         443/TCP          3d

Dashboard UI

MacBook-Pro-de-Andres:k8s kaox$ kubectl proxy
Starting to serve on 127.0.0.1:8001

Acceder al browser http://localhost:8001/ui

Otro metodo alternativo

MacBook-Pro-de-Andres:k8s kaox$ minikube dashboard
Opening kubernetes dashboard in default browser...