app.yaml

# [[ Manifest 1 ]]
# 
# Our application Deployment
# Keeps four replicas of our app running at all times.
# Replicas are automatically spread throughout the cluster.
# 
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: sintel
spec:
  replicas: 4
  selector:
    matchLabels:
      app: sintel
  template:
    metadata:
      labels:
        app: sintel
    spec:
      containers:
      - name: sintel
        image: asauber/sintel:latest
        imagePullPolicy: Always
        ports:
        - containerPort: 80
          protocol: TCP

# [[ Manifest 2 ]]
# Cluster Issuer Manifest
#
---
apiVersion: cert-manager.io/v1alpha2
kind: ClusterIssuer
metadata:
  name: letsencrypt-prod
spec:
  acme:
    # Email address used for ACME registration
    # Be sure to replace with your own email address!
    email: example@example.com
    server: https://acme-v02.api.letsencrypt.org/directory
    privateKeySecretRef:
      # Name of a secret used to store the ACME account private key
      name: letsencrypt-prod
    # Add a single challenge solver, HTTP01 using nginx
    solvers:
    - http01:
        ingress:
          class: nginx

# [[ Manifest 3 ]]
#
# Service for our Deployment.
# Creates an IP address reachable only within the cluster which load-balances
# our application replicas.
#
---
kind: Service
apiVersion: v1
metadata:
  name: sintel
spec:
  type: ClusterIP
  selector:
    app: sintel
  ports:
    - name: http
      protocol: TCP
      port: 80
      targetPort: 80

# [[ Manifest 4 ]]
#
# A resource which allows external traffic to reach our app.
# Tells nginx to forward traffic based on a hostname.
# Tells cert-manager to give us a cert.
# Tells external-dns to give us a DNS record.
#
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: sintel-ingress
  annotations:
    kubernetes.io/ingress.class: nginx
    cert-manager.io/cluster-issuer: letsencrypt-prod
    external-dns.alpha.kubernetes.io/hostname: demo1.kubeyboy.com
    external-dns.alpha.kubernetes.io/ttl: "5m"
spec:
  tls:
  - hosts:
    - demo1.kubeyboy.com
    secretName: sintel-tls
  rules:
  - host: demo1.kubeyboy.com
    http:
      paths:
      - backend:
          serviceName: sintel
          servicePort: 80