Ingress

Prérequis

• Minikube Install Driver none
• kubectl Install
• Stern Docs Release
• jq Install
• 3 terminal SSH

Activer le contrôleur d’entrée

Si vous utilisez minikube, vous devez activer le contrôleur NGNIX Ingress.

minikube addons enable ingress

Attendez une minute ou deux et vérifiez qu’il a été déployé correctement :

kubectl get pods -n ingress-nginx

ingress-nginx-admission-create-lqfh2        0/1     Completed   0          6m28s
ingress-nginx-admission-patch-z2lzj         0/1     Completed   2          6m28s
ingress-nginx-controller-69ccf5d9d8-95xgp   1/1     Running     0          6m28s

Déployer l’application

cat <<EOF | kubectl apply -f -
apiVersion: apps/v1
kind: Deployment
metadata:
  name: quarkus-demo-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: quarkus-demo
  template:
    metadata:
      labels:
        app: quarkus-demo
        env: dev
    spec:
      containers:
      - name: quarkus-demo
        image: quay.io/rhdevelopers/quarkus-demo:v1
        imagePullPolicy: Always
        ports:
        - containerPort: 8080
EOF

Exposez le service :

kubectl expose deployment quarkus-demo-deployment --type=NodePort --port=8080

kubectl get service quarkus-demo-deployment

NAME                      TYPE       CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
quarkus-demo-deployment   NodePort   10.105.106.66   <none>        8080:30408/TCP   11s

IP=$(minikube ip)
PORT=$(kubectl get service/quarkus-demo-deployment -o jsonpath="{.spec.ports[*].nodePort}")

Réaliser une requete sur le service :

curl $IP:$PORT

Configuration l’Ingress

Une ressource d’entrée est définie comme suit :

vim apps/kubefiles/demo-ingress.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: example-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /$1
spec:
  rules:
  - host: kube-team.info
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: quarkus-demo-deployment
            port:
              number: 8080

kubectl apply -f apps/kubefiles/demo-ingress.yaml

Obtenir les informations de la ressource Ingress :

kubectl get ingress

NAME              CLASS    HOSTS                 ADDRESS          PORTS   AGE
example-ingress   <none>   kube-team.info   192.168.99.115   80      68s

Vous devez attendre que le champ d’adresse soit défini. Cela peut prendre quelques minutes.

Modifiez le fichier /etc/hosts pour faire pointer le nom d’hôte vers l’adresse Ingress.

minikube ip

10.240.145.124

sudo vim /etc/hosts

10.240.145.124 kube-team.info

curl kube-devnation.info

Si vous avez un proxy :

curl --noproxy kube-devnation.info kube-devnation.info

Supersonic Subatomic Java with Quarkus quarkus-demo-deployment-8cf45f5c8-qmzwl:1

Deuxième déploiement

Déployer une deuxième version du service :

cat <<EOF | kubectl apply -f -
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mynode-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mynode
  template:
    metadata:
      labels:
        app: mynode
    spec:
      containers:
      - name: mynode
        image: quay.io/rhdevelopers/mynode:v1
        ports:
        - containerPort: 8000
EOF

kubectl expose deployment mynode-deployment --type=NodePort --port=8000

Mise à jour de l’Ingress

Ensuite, vous devez mettre à jour la ressource Ingress avec le nouveau chemin :

vim apps/kubefiles/demo-ingress-2.yaml

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: example-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /$1
spec:
  rules:
  - host: kube-team.info
    http:
      paths:
      - path: /
        backend:
          serviceName: quarkus-demo-deployment
          servicePort: 8080
      - path: /v2
        backend:
          serviceName: mynode-deployment
          servicePort: 8000

kubectl apply -f apps/kubefiles/demo-ingress-2.yaml

Tester :

curl kube-team.info

Supersonic Subatomic Java with Quarkus quarkus-demo-deployment-8cf45f5c8-qmzwl:2

curl kube-team.info/v2

Node Bonjour on mynode-deployment-77c7bf857d-5nfl4 0

Supprimer les ressources

kubectl delete deployment mynode-deployment
kubectl delete service mynode-deployment

kubectl delete deployment quarkus-demo-deployment
kubectl delete service quarkus-demo-deployment

kubectl delete -f apps/kubefiles/demo-ingress-2.yaml