一、拉取ingress-nginx的安装代码
地址：https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.11.1/deploy/static/provider/cloud/deploy.yaml
如果上面的地址访问不通的话，可以直接使用下面的内容：
由于官方镜像存放在国外，国内下载不了，我把官方的镜像改成了我自己的镜像仓库的镜像，但版本没变，只是仓库名改了一下。

apiVersion: v1
kind: Namespace
metadata:
  labels:
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
  name: ingress-nginx
---
apiVersion: v1
automountServiceAccountToken: true
kind: ServiceAccount
metadata:
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx
  namespace: ingress-nginx
---
apiVersion: v1
automountServiceAccountToken: true
kind: ServiceAccount
metadata:
  labels:
    app.kubernetes.io/component: admission-webhook
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx-admission
  namespace: ingress-nginx
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx
  namespace: ingress-nginx
rules:
- apiGroups:
  - ""
  resources:
  - namespaces
  verbs:
  - get
- apiGroups:
  - ""
  resources:
  - configmaps
  - pods
  - secrets
  - endpoints
  verbs:
  - get
  - list
  - watch
- apiGroups:
  - ""
  resources:
  - services
  verbs:
  - get
  - list
  - watch
- apiGroups:
  - networking.k8s.io
  resources:
  - ingresses
  verbs:
  - get
  - list
  - watch
- apiGroups:
  - networking.k8s.io
  resources:
  - ingresses/status
  verbs:
  - update
- apiGroups:
  - networking.k8s.io
  resources:
  - ingressclasses
  verbs:
  - get
  - list
  - watch
- apiGroups:
  - coordination.k8s.io
  resourceNames:
  - ingress-nginx-leader
  resources:
  - leases
  verbs:
  - get
  - update
- apiGroups:
  - coordination.k8s.io
  resources:
  - leases
  verbs:
  - create
- apiGroups:
  - ""
  resources:
  - events
  verbs:
  - create
  - patch
- apiGroups:
  - discovery.k8s.io
  resources:
  - endpointslices
  verbs:
  - list
  - watch
  - get
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  labels:
    app.kubernetes.io/component: admission-webhook
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx-admission
  namespace: ingress-nginx
rules:
- apiGroups:
  - ""
  resources:
  - secrets
  verbs:
  - get
  - create
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  labels:
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx
rules:
- apiGroups:
  - ""
  resources:
  - configmaps
  - endpoints
  - nodes
  - pods
  - secrets
  - namespaces
  verbs:
  - list
  - watch
- apiGroups:
  - coordination.k8s.io
  resources:
  - leases
  verbs:
  - list
  - watch
- apiGroups:
  - ""
  resources:
  - nodes
  verbs:
  - get
- apiGroups:
  - ""
  resources:
  - services
  verbs:
  - get
  - list
  - watch
- apiGroups:
  - networking.k8s.io
  resources:
  - ingresses
  verbs:
  - get
  - list
  - watch
- apiGroups:
  - ""
  resources:
  - events
  verbs:
  - create
  - patch
- apiGroups:
  - networking.k8s.io
  resources:
  - ingresses/status
  verbs:
  - update
- apiGroups:
  - networking.k8s.io
  resources:
  - ingressclasses
  verbs:
  - get
  - list
  - watch
- apiGroups:
  - discovery.k8s.io
  resources:
  - endpointslices
  verbs:
  - list
  - watch
  - get
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  labels:
    app.kubernetes.io/component: admission-webhook
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx-admission
rules:
- apiGroups:
  - admissionregistration.k8s.io
  resources:
  - validatingwebhookconfigurations
  verbs:
  - get
  - update
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx
  namespace: ingress-nginx
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: ingress-nginx
subjects:
- kind: ServiceAccount
  name: ingress-nginx
  namespace: ingress-nginx
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  labels:
    app.kubernetes.io/component: admission-webhook
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx-admission
  namespace: ingress-nginx
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: ingress-nginx-admission
subjects:
- kind: ServiceAccount
  name: ingress-nginx-admission
  namespace: ingress-nginx
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  labels:
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: ingress-nginx
subjects:
- kind: ServiceAccount
  name: ingress-nginx
  namespace: ingress-nginx
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  labels:
    app.kubernetes.io/component: admission-webhook
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx-admission
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: ingress-nginx-admission
subjects:
- kind: ServiceAccount
  name: ingress-nginx-admission
  namespace: ingress-nginx
---
apiVersion: v1
data:
  allow-snippet-annotations: "false"
kind: ConfigMap
metadata:
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx-controller
  namespace: ingress-nginx
---
apiVersion: v1
kind: Service
metadata:
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx-controller
  namespace: ingress-nginx
spec:
  externalTrafficPolicy: Local
  ipFamilies:
  - IPv4
  ipFamilyPolicy: SingleStack
  ports:
  - appProtocol: http
    name: http
    port: 80
    protocol: TCP
    targetPort: http
    nodePort: 30080
  - appProtocol: https
    name: https
    port: 443
    protocol: TCP
    targetPort: https
    nodePort: 30443
  selector:
    app.kubernetes.io/component: controller
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
  #type: LoadBalancer
  type: NodePort
---
apiVersion: v1
kind: Service
metadata:
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx-controller-admission
  namespace: ingress-nginx
spec:
  ports:
  - appProtocol: https
    name: https-webhook
    port: 443
    targetPort: webhook
  selector:
    app.kubernetes.io/component: controller
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
  type: ClusterIP
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx-controller
  namespace: ingress-nginx
spec:
  minReadySeconds: 0
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      app.kubernetes.io/component: controller
      app.kubernetes.io/instance: ingress-nginx
      app.kubernetes.io/name: ingress-nginx
  strategy:
    rollingUpdate:
      maxUnavailable: 1
    type: RollingUpdate
  template:
    metadata:
      labels:
        app.kubernetes.io/component: controller
        app.kubernetes.io/instance: ingress-nginx
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
        app.kubernetes.io/version: 1.11.1
    spec:
      containers:
      - args:
        - /nginx-ingress-controller
        - --publish-service=$(POD_NAMESPACE)/ingress-nginx-controller
        - --election-id=ingress-nginx-leader
        - --controller-class=k8s.io/ingress-nginx
        - --ingress-class=nginx
        - --configmap=$(POD_NAMESPACE)/ingress-nginx-controller
        - --validating-webhook=:8443
        - --validating-webhook-certificate=/usr/local/certificates/cert
        - --validating-webhook-key=/usr/local/certificates/key
        - --enable-metrics=false
        env:
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        - name: LD_PRELOAD
          value: /usr/local/lib/libmimalloc.so
        image: registry.cn-hangzhou.aliyuncs.com/zhaoll/controller:v1.11.1
        imagePullPolicy: IfNotPresent
        lifecycle:
          preStop:
            exec:
              command:
              - /wait-shutdown
        livenessProbe:
          failureThreshold: 5
          httpGet:
            path: /healthz
            port: 10254
            scheme: HTTP
          initialDelaySeconds: 10
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 1
        name: controller
        ports:
        - containerPort: 80
          name: http
          protocol: TCP
        - containerPort: 443
          name: https
          protocol: TCP
        - containerPort: 8443
          name: webhook
          protocol: TCP
        readinessProbe:
          failureThreshold: 3
          httpGet:
            path: /healthz
            port: 10254
            scheme: HTTP
          initialDelaySeconds: 10
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 1
        resources:
          requests:
            cpu: 100m
            memory: 90Mi
        securityContext:
          allowPrivilegeEscalation: false
          capabilities:
            add:
            - NET_BIND_SERVICE
            drop:
            - ALL
          readOnlyRootFilesystem: false
          runAsNonRoot: true
          runAsUser: 101
          seccompProfile:
            type: RuntimeDefault
        volumeMounts:
        - mountPath: /usr/local/certificates/
          name: webhook-cert
          readOnly: true
      dnsPolicy: ClusterFirst
      nodeSelector:
        kubernetes.io/os: linux
      serviceAccountName: ingress-nginx
      terminationGracePeriodSeconds: 300
      volumes:
      - name: webhook-cert
        secret:
          secretName: ingress-nginx-admission
---
apiVersion: batch/v1
kind: Job
metadata:
  labels:
    app.kubernetes.io/component: admission-webhook
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx-admission-create
  namespace: ingress-nginx
spec:
  template:
    metadata:
      labels:
        app.kubernetes.io/component: admission-webhook
        app.kubernetes.io/instance: ingress-nginx
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
        app.kubernetes.io/version: 1.11.1
      name: ingress-nginx-admission-create
    spec:
      containers:
      - args:
        - create
        - --host=ingress-nginx-controller-admission,ingress-nginx-controller-admission.$(POD_NAMESPACE).svc
        - --namespace=$(POD_NAMESPACE)
        - --secret-name=ingress-nginx-admission
        env:
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        image: registry.cn-hangzhou.aliyuncs.com/zhaoll/kube-webhook-certgen:v1.4.1
        imagePullPolicy: IfNotPresent
        name: create
        securityContext:
          allowPrivilegeEscalation: false
          capabilities:
            drop:
            - ALL
          readOnlyRootFilesystem: true
          runAsNonRoot: true
          runAsUser: 65532
          seccompProfile:
            type: RuntimeDefault
      nodeSelector:
        kubernetes.io/os: linux
      restartPolicy: OnFailure
      serviceAccountName: ingress-nginx-admission
---
apiVersion: batch/v1
kind: Job
metadata:
  labels:
    app.kubernetes.io/component: admission-webhook
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx-admission-patch
  namespace: ingress-nginx
spec:
  template:
    metadata:
      labels:
        app.kubernetes.io/component: admission-webhook
        app.kubernetes.io/instance: ingress-nginx
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
        app.kubernetes.io/version: 1.11.1
      name: ingress-nginx-admission-patch
    spec:
      containers:
      - args:
        - patch
        - --webhook-name=ingress-nginx-admission
        - --namespace=$(POD_NAMESPACE)
        - --patch-mutating=false
        - --secret-name=ingress-nginx-admission
        - --patch-failure-policy=Fail
        env:
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        image: registry.cn-hangzhou.aliyuncs.com/zhaoll/kube-webhook-certgen:v1.4.1
        imagePullPolicy: IfNotPresent
        name: patch
        securityContext:
          allowPrivilegeEscalation: false
          capabilities:
            drop:
            - ALL
          readOnlyRootFilesystem: true
          runAsNonRoot: true
          runAsUser: 65532
          seccompProfile:
            type: RuntimeDefault
      nodeSelector:
        kubernetes.io/os: linux
      restartPolicy: OnFailure
      serviceAccountName: ingress-nginx-admission
---
apiVersion: networking.k8s.io/v1
kind: IngressClass
metadata:
  labels:
    app.kubernetes.io/component: controller
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: nginx
spec:
  controller: k8s.io/ingress-nginx
---
apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingWebhookConfiguration
metadata:
  labels:
    app.kubernetes.io/component: admission-webhook
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
    app.kubernetes.io/version: 1.11.1
  name: ingress-nginx-admission
webhooks:
- admissionReviewVersions:
  - v1
  clientConfig:
    service:
      name: ingress-nginx-controller-admission
      namespace: ingress-nginx
      path: /networking/v1/ingresses
  failurePolicy: Fail
  matchPolicy: Equivalent
  name: validate.nginx.ingress.kubernetes.io
  rules:
  - apiGroups:
    - networking.k8s.io
    apiVersions:
    - v1
    operations:
    - CREATE
    - UPDATE
    resources:
    - ingresses
  sideEffects: None

执行安装命令：

[root@master1 ~]# kubectl apply -f deploy.yaml 
namespace/ingress-nginx created
serviceaccount/ingress-nginx created
serviceaccount/ingress-nginx-admission created
role.rbac.authorization.k8s.io/ingress-nginx created
role.rbac.authorization.k8s.io/ingress-nginx-admission created
clusterrole.rbac.authorization.k8s.io/ingress-nginx created
clusterrole.rbac.authorization.k8s.io/ingress-nginx-admission created
rolebinding.rbac.authorization.k8s.io/ingress-nginx created
rolebinding.rbac.authorization.k8s.io/ingress-nginx-admission created
clusterrolebinding.rbac.authorization.k8s.io/ingress-nginx created
clusterrolebinding.rbac.authorization.k8s.io/ingress-nginx-admission created
configmap/ingress-nginx-controller created
service/ingress-nginx-controller created
service/ingress-nginx-controller-admission created
deployment.apps/ingress-nginx-controller created
job.batch/ingress-nginx-admission-create created
job.batch/ingress-nginx-admission-patch created
ingressclass.networking.k8s.io/nginx created
validatingwebhookconfiguration.admissionregistration.k8s.io/ingress-nginx-admission created

安装好之后查看一下Pod和SVC的状态：

[root@master1 ~]# kubectl get svc,pod -n ingress-nginx -owide
NAME                                         TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)                      AGE   SELECTOR
service/ingress-nginx-controller             NodePort    10.101.235.42    <none>        80:30080/TCP,443:30443/TCP   73s   app.kubernetes.io/component=controller,app.kubernetes.io/instance=ingress-nginx,app.kubernetes.io/name=ingress-nginx
service/ingress-nginx-controller-admission   ClusterIP   10.100.197.238   <none>        443/TCP                      73s   app.kubernetes.io/component=controller,app.kubernetes.io/instance=ingress-nginx,app.kubernetes.io/name=ingress-nginx

NAME                                            READY   STATUS      RESTARTS   AGE   IP               NODE      NOMINATED NODE   READINESS GATES
pod/ingress-nginx-admission-create-gmldg        0/1     Completed   0          72s   172.25.104.167   master2   <none>           <none>
pod/ingress-nginx-admission-patch-8dr6w         0/1     Completed   1          72s   172.21.11.37     node2     <none>           <none>
pod/ingress-nginx-controller-79dccb475b-vppll   1/1     Running     0          72s   172.21.11.38     node2     <none>           <none>

注意：ingress-nginx-controller的Pod为ingress-nginx-controller-79dccb475b-vppll，被调度在了node2节点上，我们后续访问ingress代理的服务，都要用node2节点的IP做DNS映射。且要记住http的端口是30080，https端口是30443，这两个端口都是我们在deploy.yaml中自定义的。

查看IngressClass：

[root@master1 ~]# kubectl get IngressClass
NAME    CONTROLLER             PARAMETERS   AGE
nginx   k8s.io/ingress-nginx   <none>       15m

记住上面这个IngressClass的名称为nginx，下一步要用到。

二、部署后端资源
我们打算使用3个nginx组成nginx-service，3个tomcat组成tomcat-service，然后创建一个ingress，用于代理tomcat和nginx的服务。配置如下：

# 部署3个nginx实例
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx-pod
  template:
    metadata:
      labels:
        app: nginx-pod
    spec:
      containers:
      - name: nginx
        image: registry.cn-hangzhou.aliyuncs.com/zhaoll/nginx:1.27.0
        ports:
        - containerPort: 80
---
# 部署3个tomcat实例
apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat-deployment
spec:
  replicas: 3
  selector:
    matchLabels:
      app: tomcat-pod
  template:
    metadata:
      labels:
        app: tomcat-pod
    spec:
      containers:
      - name: tomcat
        image: registry.cn-hangzhou.aliyuncs.com/zhaoll/tomcat:8.5-jre10-slim
        ports:
        - containerPort: 8080
---
# 部署nginx的Service
apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:
  selector:
    app: nginx-pod
  type: ClusterIP
  ports:
  - port: 80
    targetPort: 80
---
# 部署tomcat的Service
apiVersion: v1
kind: Service
metadata:
  name: tomcat-service
spec:
  selector:
    app: tomcat-pod
  type: ClusterIP
  ports:
  - port: 8080
    targetPort: 8080
---
# 创建ingress
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-http
  #annotations:  
    #kubernetes.io/ingress.class: "nginx"  
spec:
  # 上面的IngressClass名称
  ingressClassName: "nginx"
  rules:
  # 域名，稍后要通过这个域名访问服务
  - host: nginx.itheima.com
    http:
      paths:
      # 路径，访问域名时后面添加的路径
      - path: /
        pathType: Prefix
        backend:
          # 要代理的服务和服务的端口
          service:
            name: nginx-service
            port: 
              number: 80
  - host: tomcat.itheima.com
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: tomcat-service
            port: 
              number: 8080

将上面的内容保存到demo.yaml文件中，并进行安装：

[root@master1 ~]# kubectl apply -f demo.yaml
[root@master1 ~]# kubectl get pod,svc,ingress
NAME                                          READY   STATUS    RESTARTS        AGE
pod/nginx-deployment-59c59966df-d5z5r         1/1     Running   0               22m
pod/nginx-deployment-59c59966df-hbh4j         1/1     Running   0               22m
pod/nginx-deployment-59c59966df-vwr5h         1/1     Running   0               22m
pod/tomcat-deployment-575d8857c7-6hqbh        1/1     Running   0               22m
pod/tomcat-deployment-575d8857c7-kktsw        1/1     Running   0               22m
pod/tomcat-deployment-575d8857c7-qjmgt        1/1     Running   0               22m

NAME                     TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
service/kubernetes       ClusterIP   10.96.0.1       <none>        443/TCP    24d
service/nginx-service    ClusterIP   10.103.125.10   <none>        80/TCP     22m
service/tomcat-service   ClusterIP   10.104.88.147   <none>        8080/TCP   22m

NAME                                     CLASS   HOSTS                                  ADDRESS         PORTS   AGE
ingress.networking.k8s.io/ingress-http   nginx   nginx.itheima.com,tomcat.itheima.com   10.101.235.42   80      21m

查看一下ingress：

[root@master1 ~]# kubectl describe ingress ingress-http
Name:             ingress-http
Labels:           <none>
Namespace:        default
Address:          10.101.235.42
Ingress Class:    nginx
Default backend:  <default>
Rules:
  Host                Path  Backends
  ----                ----  --------
  nginx.itheima.com   /   nginx-service:80 (172.20.136.17:80,172.25.104.168:80,172.26.135.23:80)
  tomcat.itheima.com  /   tomcat-service:8080 (172.21.11.39:8080,172.25.104.169:8080,172.25.130.151:8080)
Events:
  Type    Reason  Age                From                      Message
  ----    ------  ----               ----                      -------
  Normal  Sync    22m (x2 over 23m)  nginx-ingress-controller  Scheduled for sync

从上面来看已经部署完成了，看一下ingress-nginx-controller的日志：

[root@master1 ~]# kubectl logs -f ingress-nginx-controller-79dccb475b-vppll -n ingress-nginx
W0813 14:34:47.144888       7 client_config.go:659] Neither --kubeconfig nor --master was specified.  Using the inClusterConfig.  This might not work.
I0813 14:34:47.144993       7 main.go:205] "Creating API client" host="https://10.96.0.1:443"
-------------------------------------------------------------------------------
NGINX Ingress controller
  Release:       v1.11.1
  Build:         7c44f992012555ff7f4e47c08d7c542ca9b4b1f7
  Repository:    https://github.com/kubernetes/ingress-nginx
  nginx version: nginx/1.25.5

-------------------------------------------------------------------------------

I0813 14:34:47.148878       7 main.go:248] "Running in Kubernetes cluster" major="1" minor="30" git="v1.30.2" state="clean" commit="39683505b630ff2121012f3c5b16215a1449d5ed" platform="linux/amd64"
I0813 14:34:47.411837       7 main.go:101] "SSL fake certificate created" file="/etc/ingress-controller/ssl/default-fake-certificate.pem"
I0813 14:34:47.424942       7 ssl.go:535] "loading tls certificate" path="/usr/local/certificates/cert" key="/usr/local/certificates/key"
I0813 14:34:47.433034       7 nginx.go:271] "Starting NGINX Ingress controller"
I0813 14:34:47.440321       7 event.go:377] Event(v1.ObjectReference{Kind:"ConfigMap", Namespace:"ingress-nginx", Name:"ingress-nginx-controller", UID:"14446290-d9d0-455b-8d9d-483a25436a65", APIVersion:"v1", ResourceVersion:"1672010", FieldPath:""}): type: 'Normal' reason: 'CREATE' ConfigMap ingress-nginx/ingress-nginx-controller
I0813 14:34:48.634572       7 nginx.go:317] "Starting NGINX process"
I0813 14:34:48.634658       7 leaderelection.go:250] attempting to acquire leader lease ingress-nginx/ingress-nginx-leader...
I0813 14:34:48.635788       7 nginx.go:337] "Starting validation webhook" address=":8443" certPath="/usr/local/certificates/cert" keyPath="/usr/local/certificates/key"
I0813 14:34:48.635965       7 controller.go:193] "Configuration changes detected, backend reload required"
I0813 14:34:48.646166       7 leaderelection.go:260] successfully acquired lease ingress-nginx/ingress-nginx-leader
I0813 14:34:48.646453       7 status.go:85] "New leader elected" identity="ingress-nginx-controller-79dccb475b-vppll"
I0813 14:34:48.655622       7 controller.go:213] "Backend successfully reloaded"
I0813 14:34:48.655668       7 controller.go:224] "Initial sync, sleeping for 1 second"
I0813 14:34:48.655933       7 event.go:377] Event(v1.ObjectReference{Kind:"Pod", Namespace:"ingress-nginx", Name:"ingress-nginx-controller-79dccb475b-vppll", UID:"2c60e3d9-bdaf-4c90-a7f2-090eb72c74ab", APIVersion:"v1", ResourceVersion:"1672069", FieldPath:""}): type: 'Normal' reason: 'RELOAD' NGINX reload triggered due to a change in configuration
I0813 14:35:14.884334       7 main.go:107] "successfully validated configuration, accepting" ingress="default/ingress-http"
I0813 14:35:14.888599       7 store.go:440] "Found valid IngressClass" ingress="default/ingress-http" ingressclass="nginx"
I0813 14:35:14.888923       7 event.go:377] Event(v1.ObjectReference{Kind:"Ingress", Namespace:"default", Name:"ingress-http", UID:"8548894c-bbd9-4100-9e78-8a803d42385b", APIVersion:"networking.k8s.io/v1", ResourceVersion:"1672337", FieldPath:""}): type: 'Normal' reason: 'Sync' Scheduled for sync
I0813 14:35:16.341450       7 controller.go:193] "Configuration changes detected, backend reload required"
I0813 14:35:16.363364       7 controller.go:213] "Backend successfully reloaded"
I0813 14:35:16.363926       7 event.go:377] Event(v1.ObjectReference{Kind:"Pod", Namespace:"ingress-nginx", Name:"ingress-nginx-controller-79dccb475b-vppll", UID:"2c60e3d9-bdaf-4c90-a7f2-090eb72c74ab", APIVersion:"v1", ResourceVersion:"1672069", FieldPath:""}): type: 'Normal' reason: 'RELOAD' NGINX reload triggered due to a change in configuration
I0813 14:35:48.652255       7 status.go:304] "updating Ingress status" namespace="default" ingress="ingress-http" currentValue=null newValue=[{"ip":"10.101.235.42"}]
I0813 14:35:48.656752       7 event.go:377] Event(v1.ObjectReference{Kind:"Ingress", Namespace:"default", Name:"ingress-http", UID:"8548894c-bbd9-4100-9e78-8a803d42385b", APIVersion:"networking.k8s.io/v1", ResourceVersion:"1672462", FieldPath:""}): type: 'Normal' reason: 'Sync' Scheduled for sync

从最后几条日志来看，我们创建的ingress已经与ingress-nginx成功关联上了，下面可以进行访问测试了。

三、访问测试
在Windows电脑的HOSTS文件里添加两行配置：

11.0.1.105 nginx.itheima.com
11.0.1.105 tomcat.itheima.com

这个11.0.1.105是你ingress-nginx-controller的Pod所在k8s节点的地址，这点需要记清楚了。
浏览器访问测试：nginx.itheima.com:30080

浏览器访问测试：tomcat.itheima.com:30080

访问成功，配置完成了。