ingress与ingress-controller小结

k8s之ingress

service的作用：体现在两个方面

  1. 对于集群内部，他不断跟踪pod的变化，更新endpoint中对应pod的对象、提供了ip不断变化的pod的服务发现的机制
  2. 对于集群外部，他类似负载均衡器，可以在集群内外部对pod进行访问
    ingress的作用：用于暴露集群内的service在网络节点上

kubernetes提供了下面的几种方式来访问集群内部的service：

  1. NodePort：

    • 将Service暴露在节点网络上
    • NodePort背后就是Kube-Proxy，Kube-Proxy是沟通Service网络、Pod网络和节点的桥梁
    • 一个NodePort端口只能对应一个服务、所以在几十上百的服务在集群中运行时、对NodePort端口管理就是一个灾难、所以在生产环境下一般不用NodePort（可使用的端口范围：30000-32767）

  2. LoadBalancer：

    • 只能用在云平台中
    • 通过设置LoadBalancer映射到云服务商提供的LoadBalancer地址
    • 在Service提交后，kubernetes会调用CloudProvider在公有云上为创建一个负载均衡服务，并且把被代理的Pod的ip地址配置给负载均衡服务给后端

  3. externallIPs：

    • Service允许为其分配外部ip，如果外部ip路由到集群中一个或多个Node上，Service会被暴露给这些externallIPs
    • 通过外部ip进入到集群的流量，将会被路由到Service的EndPoint上

  4. Ingress：

    • 只需一个或者少量的公网ip和LB，就可以同时将多个HTTP服务暴露到外网、七层反向代理
    • 可以简单理解为Service的Service，实际就是一组域名和URL路径，把用户的请求按照规则转发到一个或多个service

Ingress 组件

ingress

ingress是一个API对象，通过对yaml文件来配置，ingress对象的作用是定义请求如何转发到service的规则、可以理解为配置模板
ingress通过http或https暴露集群内部的Service，给Service提供外部访问的URL、负载均衡、SSL/TLS能力以及基于域名的反向代理
ingress要依靠ingress-controller来集体事项以上的功能

ingress-controller (Ingress控制器-如ingress-nginx)

ingress-controller 是具体实现反向代理济负载均衡的程序、对ingress定义的yaml规则进行解析、根据ingress配置的yaml规则来进行请求的转发
ingress-controller 并不是k8s自带的组件、实际ingress-controller只是一个统称、用户可以选择不同的ingress-controller实现、目前由k8s维护的ingress-controller只有：

  • google云的GCE
  • ingress-nginx
    一般来说，ingress-controller的形式都是一个pod，里面跑着daemon程序和反向代理的程序
    daemon 负责不断监控集群的变化、根据ingress对象生成配置并应用新配置到反向代理，比如ingress-nginx就是动态生成nginx配置、动态更新upstream，并在需要的时候reload程序应用新配置

ingress-nginx 的github地址
ingress-nginx 的官网

小结:ingress-controller才是负责具体转发的组件、通过各种方式将它暴露在集群的入口、外部对集群的请求流量会先到ingress-controller，而ingress对象是用来告诉ingress-controller该如何转发这些请求、比如哪些域名、哪些URL要转发到哪些Service等等

Ingress 工作原理

  1. ingress-controller通过和kubernetes的API-server交互、动态的去感知集群中ingress规则的变化
  2. 然后去读取ingress规则，按照yaml文件中自定义的规则，规则就是写明了哪个域名对应哪个Service或者哪个路由，生成一段nginx的配置
  3. 将生产的nginx配置写到ingress-controller的pod里面，这个ingress-controller的pod里运行一个Nginx服务，控制器会把生成的nginx配置写入Nginx服务中的 /etc/nginx.conf 文件中
  4. 最后自动reload一下是配置生效、以此达到域名区分配置和动态更新的作用

Ingress 暴露Service的方式

  1. Deployment + LoadBalancer：

    如果要把ingress部署在公有云中，那用这种方式比较适合
    用Deployment部署ingress-controller ，创建一个type: LoadBalancer 的Service关联这组pod
    大部分公有云，都会为LoadBalancer的Service自动创建一个负载均衡器，通常还绑定了公网的地址、只要把域名解析指向该地址，就实现了集群服务的对外暴露
    缺点：不适用于高并发、大集群

  2. DaemonSet + HostNetwork + nodeSelector

    用DaemonSet结合nodeselector来部署ingress-controller 到特定的node上，然后使用HostNetwork直接把该pod与宿主机node的网络打通，直接使用宿主机的80/443端口就能访问服务
    这时，ingress-controller所在的node机器就很类似传统架构的边缘节点、比如机房入口的nginx服务器
    该方式整个请求链路是最简单的，性能相对NodePort模式更好
    缺点：由于直接利用宿主机节点的网络和端口、导致一个node只能部署一个ingreess-controller pod
    比较适合大并发的生产环境使用

  3. Deployment + NodePort：

    用deployment模式部署ingress-controller，并创建对应的service，但是type：NodePort
    这样ingress就会暴露在集群节点ip的特定端口上
    由于nodeport暴露的端口是随机端口、一般会在前面再搭建一套负载均衡器来转发请求
    该方式适用于宿主机是相对固定的ip地址不变的情况下
    NodePort方式暴露ingress 虽然简单方便、但是NodePort多了一层NAT，在请求量极大时对性能有一定的影响
    缺点：对后期的维护难度加大、对流量转发压力也会变大、且对高并发支持不是很友好

流程图

客户端–>ingress-controller–>ingress(根据配置的路由规则)–>Service(找到对应的服务)–>pod(集群内通过service去访问pod或容器内的程序)

参考：https://kubernetes.io/zh-cn/docs/concepts/services-networking/ingress/

Ingress 配置部署

  1. 创建ingress-controller的Deployment：
  • ingress-nginx-controller.yaml
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    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: 1.8.1
      name: ingress-nginx
      namespace: ingress-nginx
    ---
    apiVersion: v1
    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: 1.8.1
      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: 1.8.1
      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: 1.8.1
      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: 1.8.1
      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: 1.8.1
      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: 1.8.1
      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: 1.8.1
      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: 1.8.1
      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: 1.8.1
      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: "true"
      compute-full-forwarded-for: "true"
      forwarded-for-header: X-Forwarded-For
      use-forwarded-headers: "true"
    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: 1.8.1
      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: 1.8.1
      annotations:
        service.cloud.tencent.com/local-svc-weighted-balance: "true"
        service.kubernetes.io/local-svc-only-bind-node-with-pod: "true"
        service.kubernetes.io/tke-existed-lbid: lb-jw7q1g74
      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
      - appProtocol: https
        name: https
        port: 443
        protocol: TCP
        targetPort: https
      selector:
        app.kubernetes.io/component: controller
        app.kubernetes.io/instance: ingress-nginx
        app.kubernetes.io/name: ingress-nginx
      type: LoadBalancer
    ---
    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: 1.8.1
      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: 1.8.1
      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
      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: 1.8.1
        spec:
          imagePullSecrets:
            - name: docker-secret
          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
            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: ccr.gpdc.cloud.cn/library-images/nginx-ingress-controller:v1.8.1
            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: true
              capabilities:
                add:
                - NET_BIND_SERVICE
                drop:
                - ALL
              runAsUser: 101
            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: 1.8.1
      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: 1.8.1
          name: ingress-nginx-admission-create
        spec:
          imagePullSecrets:
            - name: docker-secret
          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: ccr.gpdc.cloud.cn/library-images/kube-webhook-certgen:v20230407
            imagePullPolicy: IfNotPresent
            name: create
            securityContext:
              allowPrivilegeEscalation: false
          nodeSelector:
            kubernetes.io/os: linux
          restartPolicy: OnFailure
          securityContext:
            fsGroup: 2000
            runAsNonRoot: true
            runAsUser: 2000
          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: 1.8.1
      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: 1.8.1
          name: ingress-nginx-admission-patch
        spec:
          imagePullSecrets:
            - name: docker-secret
          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: ccr.gpdc.cloud.cn/library-images/kube-webhook-certgen:v20230407
            imagePullPolicy: IfNotPresent
            name: patch
            securityContext:
              allowPrivilegeEscalation: false
          nodeSelector:
            kubernetes.io/os: linux
          restartPolicy: OnFailure
          securityContext:
            fsGroup: 2000
            runAsNonRoot: true
            runAsUser: 2000
          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: 1.8.1
      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: 1.8.1
      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
    1
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    安装：kubectl apply -f ingress-nginx.yaml
    查看：kubectl get pod -n ingress-nginx
  1. 创建 Ingress 资源：
    ingress.yaml
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    apiVersion: networking.k8s.io/v1
    kind: Ingress 
    metadata: 
      name: ingress-rule
      namespace: ops-system
      annotations: 
        kubernetes.io/ingress.class: nginx 
        nginx.ingress.kubernetes.io/proxy-connect-timeout: "30"
        nginx.ingress.kubernetes.io/proxy-send-timeout: "600"
        nginx.ingress.kubernetes.io/proxy-read-timeout: "600"
        nginx.ingress.kubernetes.io/send-timeout: "600"
        nginx.ingress.kubernetes.io/enable-cors: "true"
        nginx.ingress.kubernetes.io/cors-allow-methods: "*"
        nginx.ingress.kubernetes.io/cors-allow-origin: "*"
        nginx.ingress.kubernetes.io/proxy-body-size: "1024m"
    spec: 
      tls:
        - hosts:
            - {IP_OR_DOMAIN}    # 修改如果不写域名可以去掉、默认就是接受所有ip进来的流量
          secretName: ops-tls-secret
      rules: 
        - http: 
            paths:
              - path: '/' 
                pathType: Prefix
                backend: 
                  service:
                    name: ops-webui-svc
                    port: 
                      number: 80
              - path: '/images' 
                pathType: Prefix
                backend: 
                  service:
                    name: ops-webui-svc
                    port: 
                      number: 80
              - path: '/static' 
                pathType: Prefix
                backend: 
                  service:
                    name: ops-webui-svc
                    port: 
                      number: 80
              - path: '/models' 
                pathType: Prefix
                backend: 
                  service:
                    name: ops-webui-svc
                    port: 
                      number: 80
              - path: '/fonts' 
                pathType: Prefix
                backend: 
                  service:
                    name: ops-webui-svc
                    port: 
                      number: 80
              - path: '/iconfont' 
                pathType: Prefix
                backend: 
                  service:
                    name: ops-webui-svc
                    port: 
                      number: 80
              - path: '/diffhtml/css_js' 
                pathType: Prefix
                backend: 
                  service:
                    name: ops-static-svc
                    port: 
                      number: 80
              - path: '/data/key_cfg_compare/export' 
                pathType: Prefix
                backend: 
                  service:
                    name: ops-static-svc
                    port: 
                      number: 80
              - path: '/api'
                pathType: Prefix
                backend:
                  service:
                    name: iam-svc
                    port: 
                      number: 8888
              - path: '/asset'
                pathType: Prefix
                backend:
                  service:
                    name: kong-svc
                    port: 
                      number: 8000
              - path: '/ops-manage/ws'
                pathType: Prefix
                backend:
                  service:
                    name: kong-svc
                    port: 
                      number: 8000
              - path: '/ops-manage'
                pathType: Prefix
                backend:
                  service:
                    name: kong-svc
                    port: 
                      number: 8000
              - path: '/ops-elink'
                pathType: Prefix
                backend:
                  service:
                    name: kong-svc
                    port: 
                      number: 8000
              - path: '/ops-metrics'
                pathType: Prefix
                backend:
                  service:
                    name: kong-svc
                    port: 
                      number: 8000
            
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    创建：kubectl apply -f ingress.yaml
    查看：kubectl get ingress -n ops-system
    kubectl describe ingress-nginx -n ops-system