Ingress 实战

创建 Deployment

deploy-web.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: web
  labels:
    app: nginx
spec:
  replicas: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:latest
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 80
          name: web

创建

kubectl create -f deploy-web.yaml

修改 html 以区分（可选）

kubectl exec -it web-xxxx -- bash
echo web-0 > /usr/share/nginx/html/index.html

kubectl exec -it web-xxxx -- bash
echo web-1 > /usr/share/nginx/html/index.html

创建 Service

svc-ng.yaml

apiVersion: v1
kind: Service
metadata:
  name: svc-web
spec:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 8888
      targetPort: 80

创建

kubectl create -f svc-web.yaml

创建 Ingress

ingress-web.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-web
spec:
  ingressClassName: nginx
  rules:
  - host: web.yunwei361.com
    http:
      paths:
      - backend:
          service:
            name: svc-web
            port:
              number: 8888
        path: /
        pathType: Exact

命令行创建（可选）

kubectl create ingress ingress-web --rule="web.yunwei361.com/=svc-web:8888" --class=nginx --dry-run=client -o yaml > ingress-web.yaml

访问

方式一：临时映射

直接将 nginx-ingress controller 对应的pod端口映射到本机

kubectl -n nginx-ingress get pod
NAME                             READY   STATUS    RESTARTS   AGE
nginx-ingress-7cf5476c47-c7mw6   1/1     Running   0          166m

kubectl port-forward -n nginx-ingress nginx-ingress-7cf5476c47-c7mw6 8080:80 &

curl --resolve web.yunwei361.com:8080:127.0.0.1 http://web.yunwei361.com:8080

方式二：NodePort

svc-nodeport-ingress.yaml

apiVersion: v1
kind: Service
metadata:
  name: nginx-ingress
  namespace: nginx-ingress
spec:
  type: NodePort
  ports:
  - port: 80
    targetPort: 80
    protocol: TCP
    name: http
  - port: 443
    targetPort: 443
    protocol: TCP
    name: https
  selector:
    app: nginx-ingress

kubectl create -f svc-nodeport-ingress.yaml

修改本地hosts

192.168.1.29 web.yunwei361.com

访问

curl web.yunwei361.com:<NodePort对应的端口>