Basic App Deployment

Now we have a functional cluster, lets create a basic web application to check its deploying correctly, storage is in use and the ingress works.

Step 1 - Create config YAMLs

We need to create 4 YAML files.

1. Pod
2. Storage
3. Service
4. Ingress

webapp_pod.yaml

apiVersion: v1
kind: Pod
metadata:
  name: nginx-webserver-01
  namespace: test-apps
  labels:
    storage: local-longhorn
    app: nginx-webserver-01
spec:
  containers:
  - name: nginx-webserver-01
    image: nginx:stable-alpine
    resources:
      limits:
        memory: "128Mi"
        cpu: "500m"
    ports:
      - containerPort: 80
    volumeMounts:
    - name: nginx-webserver-01-webroot
      mountPath: "/usr/share/nginx/html"
  volumes:
    - name: nginx-webserver-01-webroot
      persistentVolumeClaim:
        claimName: nginx-webserver-01-webroot
  restartPolicy: "Never"

webapp_storage.yaml

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: nginx-webserver-01-webroot
  namespace: test-apps
  labels:
    storage: local-longhorn
    app: nginx-webserver-01
spec:
  storageClassName: longhorn
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 100Mi

webapp_service.yaml

kind: Service
apiVersion: v1
metadata:
  name: nginx-webserver-01-service
  namespace: test-apps
spec:
  type: ClusterIP
  selector:
    app: nginx-webserver-01
  ports:
  - name: http
    port: 80
    protocol: TCP
    targetPort: 80

webapp_ingress.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: nginx-webserver-01-ingress
  namespace: test-apps
  annotations:
    kubernetes.io/ingress.class: traefik
spec:
  rules:
  - host: "nginx-webserver-01.domain.com"
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: nginx-webserver-01-service
            port:
              number: 80

Apply all four YAML files -

kubectl apply -f webapp_pod.yaml -f webapp_storage.yaml -f webapp_service.yaml -f webapp_ingress.yaml

tip

You can combine YAML files into one, separated by ---.

Step 2 - Check the resources have deployed

Run the following to list all resources within the namespace used by the above test app -

kubectl

Step 3 - Create a test HTML file.

Coming soon!

Step 4 - Browse to the URL

Coming soon!

Next Step

Next, go to the next step, Portainer Agent.
Or,
Go back to the index page.