Deploy a Kubernetes App on ICP

You can do any of the following

• Install on your Machine (or on a VM)
• Reserve a VM on BlueDemos
• ICP Hosted Trial on BlueDemos
• Reserve a Hosted Trial

Deploy a an App to the Cluster

We can use kubectl to deploy an application to ICP

Configure kubectl

We can use the configuration code from ICP as follows

kubectl config set-cluster cluster.local --server=https://10.0.0.1:8001 --insecure-skip-tls-verify=true
kubectl config set-context cluster.local-context --cluster=cluster.local
kubectl config set-credentials admin --token=<YOUR TOKEN>kubectl config set-context cluster.local-context --user=admin --namespace=cert-manager
kubectl config use-context cluster.local-context

Deploy the Application

DeveloperWorks Article on Doing this

Then we need to get our deployment manifest file and run the deploy command, we will need the following

• Deployment manifest
• Service manifest
• Ingress manifest

We need the service to expose our app on a port, and an ingress rule to expose that externally

deployment.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
 name: express-basic
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: express-basic
        version: v2
    spec:
      containers:
      - image: nabeelvalley/express-basic
        name: express-basic
        ports:
        - containerPort: 8080

service.yaml

apiVersion: v1
kind: Service
metadata:
 name: express-basic
 labels:
   app: express-basic
   version: v2
spec:
 ports:
 - port: 8080
   name: http
 selector:
   app: express-basic
   version: v2

ingress.yaml

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
 name: express-basic-ingress
spec:
  rules:
  - http:
      paths:
      - path: /
        backend:
         serviceName: express-basic
         servicePort: 8080
      - path: /test
        backend:
          serviceName: express-basic
          servicePort: 8080 

We can then deploy these resource definitions on our cluster with

kubectl apply -f deployment.yaml
kubectl apply -f service.yaml
kubectl apply -f ingress.yaml

Alternatively we can include all three in a single file and apply it as follows

deploy.yaml

apiVersion: v1
kind: Service
metadata:
 name: express-basic
 labels:
   app: express-basic
   version: v2
spec:
 ports:
 - port: 8080
   name: http
 selector:
   app: express-basic
   version: v2

---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
 name: express-basic
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: express-basic
        version: v2
    spec:
      containers:
      - image: nabeelvalley/express-basic
        name: express-basic
        ports:
        - containerPort: 8080
---

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
 name: express-basic-ingress
spec:
  rules:
  - http:
      paths:
      - path: /
        backend:
         serviceName: express-basic
         servicePort: 8080
      - path: /test
        backend:
          serviceName: express-basic
          servicePort: 8080 
---

kubectl apply -f deploy.yaml