Kubernetes Workshop in the MayopeCloud

deployment.yaml

apiVersion: apps/v1
kind: Deployment 
metadata: 
  name: hello-world
spec:
  selector: # These labels have to match those configure under template.metadata.labels
    matchLabels:
      app: hello-world
  template: 
    metadata:
      labels: # These are the labels assigned to the pod so it can be identified
        app: hello-world
    spec:
      containers:
        - name: hello-world
          image: nginxdemos/hello 
          ports: 
            - name: web
              containerPort: 80
              protocol: TCP

deployment_demo.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-world
spec:
  selector:
    matchLabels:
      app: hello-world
  template:
    metadata:
      labels:
        app: hello-world
    spec:
      containers:
      - name: hello-world
        image: klg71/mayopedemoapp:latest
        ports:
        - name: http
          containerPort: 8080
        resources:
          requests:
            memory: 500Mi
            cpu: 0.5
          limits:
            memory: 500Mi
            cpu: 0.5

deployment_env.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-world
spec:
  selector:
    matchLabels:
      app: hello-world
  template:
    metadata:
      labels:
        app: hello-world
    spec:
      containers:
      - name: hello-world
        image: klg71/mayopedemoapp:latest
        ports:
        - name: http
          containerPort: 8080
        env:
          - name: INSTANCE_NAME
            value: nautilus
        resources:
          requests:
            memory: 500Mi
            cpu: 0.5
          limits:
            memory: 500Mi
            cpu: 0.5

ingress.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: hello-world
spec:
  rules:
    - host: hello-world-1e7bdecd-8f67-4329-bc49-08784410c2de.dyn.mayope.net
      http:
        paths:
          - path: /
            pathType: "Prefix"
            backend:
              service:
                  name: "hello-world"
                  port:
                    number: 80

pod.yaml

apiVersion: v1
kind: Pod # Kind of resource to deploy
metadata: # general information about our resource
  name: hello-world
spec:
  containers:
    - name: hello-world
      image: nginxdemos/hello # Docker Image to deploy
      ports: # Ports exposed by this container
        - name: web
          containerPort: 80
          protocol: TCP

service.yaml

apiVersion: v1
kind: Service
metadata:
  name: hello-world # This is also the dns name where this service is reachable within the same namespace
spec:
  ports:
    - name: http # This port in this service is named 'http'
      port: 80 # It exposes itself on port 80
      protocol: TCP # It uses the TCP protocol 
      targetPort: 80 # It will target the port 80 in the matching container
  selector: # All containers matching this label will be considered for traffic
    app: hello-world
  # There are several types of services ClusterIP assigns the service an ip in the cluster 
  # ClusterIP services are only exposed within the cluster which is enough for this use case
  type: ClusterIP