1.部署ingress-nginx-controller

继在三台虚拟机部署k8s后，需要部署ingress-nginx-controller，才能使设置的ingress规则生效。

1.1下载yaml

# 下载ingress-nginx-controller的deploy.yaml
	wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.9.0/deploy/static/provider/baremetal/deploy.yaml

# 如果deploy.yaml中的镜像拉取不下来，查找可用的ingress-nginx-controller和kube-webhook-certgen镜像
	docker search ingress-nginx-controller
	docker search kube-webhook-certgen

# ---------------------手动拉取镜像需要在每个节点都要执行----------------------
# 选择可用的镜像拉取，版本号为 v1.9.0 和 v20230407，都是较新的版本
	docker pull xxx/ingress-nginx-controller:v1.9.0
	docker pull xxx/kube-webhook-certgen:v20230407
# docker tag 镜像
	docker tag xxx/kube-webhook-certgen:v20230407 k8s/ingress-nginx/kube-webhook-certgen:v20230407
	docker tag xxx/ingress-nginx-controller:v1.9.0 k8s/ingress-nginx-controller:v1.9.0
# 如果有搭建的docker registry服务器，可将拉取的镜像 push 至服务器，就不需要手动在每个节点拉取镜像了。

1.2修改yaml

1.2.1三处image的修改

（上面步骤docker tag 的镜像名叫什么，对应的image就改为什么）

ingress-nginx-controller有一处

kube-webhook-certgen有两处

1.2.2在相应位置添加

添加 hostNetwork: true。
若不添加，后续使用 域名:nodeport 访问；添加之后，直接使用域名访问。

执行

#修改完之后执行
	kubectl apply -f deploy.yaml
	kubectl get all -n ingress-nginx

显示如下，则成功

2.测试

2.1执行测试的yaml

两个yaml文件如下

# nginx-tomcat-test.yaml
apiVersion: v1
kind: Namespace
metadata:
  name: test

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  namespace: test
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx-pod
  template:
    metadata:
      labels:
        app: nginx-pod
    spec:
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat-deployment
  namespace: test
spec:
  replicas: 3
  selector:
    matchLabels:
      app: tomcat-pod
  template:
    metadata:
      labels:
        app: tomcat-pod
    spec:
      containers:
      - name: tomcat
        image: tomcat:8.0-alpine
        ports:
        - containerPort: 8080

# nginx-tomcat-svc-ingress.yaml
apiVersion: v1
kind: Service
metadata:
  name: nginx-service
  namespace: test
spec:
  selector:
    app: nginx-pod
  clusterIP: None
  type: ClusterIP
  ports:
  - port: 80
    targetPort: 80

---
apiVersion: v1
kind: Service
metadata:
  name: tomcat-service
  namespace: test
spec:
  selector:
    app: tomcat-pod
  clusterIP: None
  type: ClusterIP
  ports:
  - port: 8080
    targetPort: 8080

---
apiVersion: networking.k8s.io/v1
kind: Ingress  
metadata:
  name: test-ingress
  namespace: test
spec:
  ingressClassName: nginx
  rules:
  - host: "tomcat.demo.com"
    http:
      paths:
      - pathType: Prefix
        path: "/"
        backend:
          service:
            name: tomcat-service
            port:
              number: 8080
  - host: "nginx.demo.com"
    http:
      paths:
      - pathType: Prefix
        path: "/"
        backend:
          service:
            name: nginx-service
            port:
              number: 80

# 执行
	kubectl apply -f nginx-tomcat-deploy.yaml
	kubectl apply -f nginx-tomcat-svc-ingress.yaml
# 查看
	kubectl get all -n test
	kubectl get ingress -n test

显示：

2.2浏览器访问

设置windows下的hosts文件，添加

192.168.255.143 tomcat.demo.com  nginx.demo.com

浏览器访问，显示如下页面，就算大功告成 ！


清理资源

kubectl delete -f nginx-tomcat-svc-ingress.yaml
kubectl delete -f nginx-tomcat-deploy.yaml

上面给出的是ingress的http代理，https代理待后续给出。。。