Updated: 03 September 2023

Deploy a Kubernetes App on ICP

You can do any of the following

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

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

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

service.yaml

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

ingress.yaml

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

We can then deploy these resource definitions on our cluster with

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

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

deploy.yaml

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apiVersion: v1
2
kind: Service
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metadata:
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  name: express-basic
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  labels:
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    app: express-basic
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    version: v2
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spec:
9
  ports:
10
    - port: 8080
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      name: http
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  selector:
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    app: express-basic
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    version: v2
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---
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apiVersion: extensions/v1beta1
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kind: Deployment
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metadata:
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  name: express-basic
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spec:
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  replicas: 1
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  template:
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    metadata:
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      labels:
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        app: express-basic
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        version: v2
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    spec:
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      containers:
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        - image: nabeelvalley/express-basic
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          name: express-basic
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          ports:
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            - containerPort: 8080
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---
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apiVersion: extensions/v1beta1
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kind: Ingress
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metadata:
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  name: express-basic-ingress
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spec:
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  rules:
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    - http:
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        paths:
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          - path: /
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            backend:
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              serviceName: express-basic
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              servicePort: 8080
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          - path: /test
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            backend:
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              serviceName: express-basic
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              servicePort: 8080
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---
Terminal window
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kubectl apply -f deploy.yaml