Deploy nginx on OpenShift - example

00-openshift-example-deploy-nginx.md

OpenShift Example: Deploy nginx web server by creating resources from YAML files

Let's deploy nginx!

We'll create a Deployment, a Service and a Route. 🥔🥔

1. We create a Deployment to run the nginx-unprivileged image (this Nginx image doesn't run nginx as root - because OpenShift doesn't like that!)
2. We create a Service which load balances between the pods in the Deployment.
3. We create a Route which forwards traffic onto the Service, and the Pods!

Add each of these YAMLs to the cluster, using the web console or using oc apply -f <filename.yml>.

And.... VOILA.

01-deployment.yml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx
  labels:
    app: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
        - name: nginx
          image: nginxinc/nginx-unprivileged:1.18
          ports:
            - containerPort: 8080

02-service.yml

kind: Service
apiVersion: v1
metadata:
  name: nginx
spec:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 8080
      targetPort: 8080

03-route.yml

kind: Route
apiVersion: route.openshift.io/v1
metadata:
  name: nginx
spec:
  to:
    kind: Service
    name: nginx
    weight: 100
  port:
    targetPort: 8080
  tls:
    termination: edge