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k8s中部署nginx-ingress实现外部访问k8s集群内部服务_ingress跨ns访问后端service
作者：凡人多烦事01 | 2024-03-28 03:23:23
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ingress跨ns访问后端service
k8s通过nginx-ingress实现集群外网访问功能
一：ingress概述
1.1 ingress 工作原理
step1：ingress contronler通过与k8s的api进行交互，动态的去感知k8s集群中ingress服务规则的变化，然后读取它，并按照定义的ingress规则，转发到k8s集群中对应的service。
step2：而这个ingress规则写明了哪个域名对应k8s集群中的哪个service，然后再根据ingress-controller中的nginx配置模板，生成一段对应的nginx配置。
step3：然后再把该配置动态的写到ingress-controller的pod里，该ingress-controller的pod里面运行着一个nginx服务，控制器会把生成的nginx配置写入到nginx的配置文件中，然后reload一下，使其配置生效,以此来达到域名分配置及动态更新的效果。
1.2 ingress可以解决的问题
1）动态配置服务
如果按照传统方式, 当新增加一个服务时, 我们可能需要在流量入口加一个反向代理指向我们新的k8s服务. 而如果用了Ingress, 只需要配置好这个服务, 当服务启动时, 会自动注册到Ingress的中, 不需要而外的操作。
2）减少不必要的端口暴露
配置过k8s的都清楚, 第一步是要关闭防火墙的, 主要原因是k8s的很多服务会以NodePort方式映射出去, 这样就相当于给宿主机打了很多孔, 既不安全也不优雅. 而Ingress可以避免这个问题, 除了Ingress自身服务可能需要映射出去, 其他服务都不要用NodePort方式。
二、部署nginx-ingress
2.0 2.2 相关部署组件说明
| PodName | namespace | ServiceName | ports | 部署方式 | 作用 |
|---|---|---|---|---|---|
| ingress-nginx-controller | test | ingress-nginx-controller | NodePort :80(http)、443（https） | DaemonSet | 实现基于灵活的 ingress 策略定义的服务路由功能 |
| ingress-nginx-admission-create | test | ingress-nginx-controller-admission | LoadBalancer: 443 | Job | 是用来创建证书的，需要指定证书的名称、域名、ns等信息 |
| ingress-nginx-admission-patch | test | ingress-nginx-controller-admission | LoadBalancer: 443 | Job | 将前面创建的证书中的ca提取出来，写入到指定的admission webhook配置中 |
| ingress实例 | test | ingress | nginx转发具体配置文件 |
2.1 编写nginx-ingreess相关资源文件
[root@master1 ingress]# cat > nginx-ingress.yaml << EOF apiVersion: v1 kind: Namespace metadata: name: test --- 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: 1.4.0 name: ingress-nginx namespace: test --- 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: 1.4.0 name: ingress-nginx-admission namespace: test --- 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: 1.4.0 name: ingress-nginx namespace: test 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: - "" resourceNames: - ingress-controller-leader resources: - configmaps verbs: - get - update - apiGroups: - "" resources: - configmaps verbs: - create - apiGroups: - coordination.k8s.io resourceNames: - ingress-controller-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: 1.4.0 name: ingress-nginx-admission namespace: test 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: 1.4.0 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: 1.4.0 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: 1.4.0 name: ingress-nginx namespace: test roleRef: apiGroup: rbac.authorization.k8s.io kind: Role name: ingress-nginx subjects: - kind: ServiceAccount name: ingress-nginx namespace: test --- 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: 1.4.0 name: ingress-nginx-admission namespace: test roleRef: apiGroup: rbac.authorization.k8s.io kind: Role name: ingress-nginx-admission subjects: - kind: ServiceAccount name: ingress-nginx-admission namespace: test --- 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: 1.4.0 name: ingress-nginx roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: ingress-nginx subjects: - kind: ServiceAccount name: ingress-nginx namespace: test --- 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: 1.4.0 name: ingress-nginx-admission roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: ingress-nginx-admission subjects: - kind: ServiceAccount name: ingress-nginx-admission namespace: test --- apiVersion: v1 data: allow-snippet-annotations: "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: 1.4.0 name: ingress-nginx-controller namespace: test --- 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: 1.4.0 name: ingress-nginx-controller namespace: test 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: NodePort --- apiVersion: v1 kind: Service metadata: annotations: ingressclass.kubernetes.io/is-default-class: "true" 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: 1.4.0 name: ingress-nginx-controller-admission namespace: test 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: LoadBalancer --- apiVersion: apps/v1 kind: DaemonSet 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: 1.4.0 name: ingress-nginx-controller namespace: test 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 spec: hostNetwork: true containers: - args: - /nginx-ingress-controller - --publish-service=$(POD_NAMESPACE)/ingress-nginx-controller - --election-id=ingress-controller-leader - --controller-class=k8s.io/ingress-nginx - --ingress-class=nginx - --configmap=$(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: anjia0532/google-containers.ingress-nginx.controller:v1.4.0 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: 1.4.0 name: ingress-nginx-admission-create namespace: test 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: 1.4.0 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: anjia0532/google-containers.ingress-nginx.kube-webhook-certgen:v20220916-gd32f8c343 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: 1.4.0 name: ingress-nginx-admission-patch namespace: test 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: 1.4.0 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: anjia0532/google-containers.ingress-nginx.kube-webhook-certgen:v20220916-gd32f8c343 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: annotations: ingressclass.kubernetes.io/is-default-class: "true" 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: 1.4.0 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: 1.4.0 name: ingress-nginx-admission webhooks: - admissionReviewVersions: - v1 clientConfig: service: name: ingress-nginx-controller-admission namespace: test 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 EOF
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应用生效
[root@master1 ingress]# kubectl apply -f nginx-ingress.yaml 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 daemonset.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
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验证
[root@master1 ingress]# kubectl get pods -n test NAME READY STATUS RESTARTS AGE ingress-nginx-admission-create-z2xgq 0/1 Completed 0 3m8s ingress-nginx-admission-patch-qpnh7 0/1 Completed 2 3m8s ingress-nginx-controller-kc7km 1/1 Running 0 3m8s ingress-nginx-controller-knjm6 0/1 CrashLoopBackOff 3 (19s ago) 3m8s ingress-nginx-controller-mzqjn 1/1 Running 0 3m8s ingress-nginx-controller-xcxsd 1/1 Running 0 3m8s nfs-client-provisioner-fb55999fb-pcrqt 1/1 Running 0 4h11m web-0 1/1 Running 0 4h5m web-1 1/1 Running 0 4h5m [root@master1 ingress]# kubectl logs -n test ingress-nginx-controller-knjm6 ------------------------------------------------------------------------------- NGINX Ingress controller Release: v1.4.0 Build: 50be2bf95fd1ef480420e2aa1d6c5c7c138c95ea Repository: https://github.com/kubernetes/ingress-nginx nginx version: nginx/1.19.10 ------------------------------------------------------------------------------- F0524 06:17:54.168788 6 main.go:67] port 80 is already in use. Please check the flag --http-port
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报错解决：
由POD报错日志可知，80端口被占用了，解决后重启pod即可。
[root@master1 ingress]# docker ps|grep rancher 56e840839dc1 rancher/rancher:v2.7.0-rc12 "entrypoint.sh" 7 days ago Up 7 days 0.0.0.0:80->80/tcp, 0.0.0.0:443->443/tcp rancher [root@master1 ingress]# docker stop rancher rancher [root@master1 ingress]# kubectl get pods -n test NAME READY STATUS RESTARTS AGE ingress-nginx-admission-create-z2xgq 0/1 Completed 0 8m46s ingress-nginx-admission-patch-qpnh7 0/1 Completed 2 8m46s ingress-nginx-controller-kc7km 1/1 Running 0 8m46s ingress-nginx-controller-knjm6 0/1 CrashLoopBackOff 6 (53s ago) 8m46s ingress-nginx-controller-mzqjn 1/1 Running 0 8m46s ingress-nginx-controller-xcxsd 1/1 Running 0 8m46s nfs-client-provisioner-fb55999fb-pcrqt 1/1 Running 0 4h17m web-0 1/1 Running 0 4h11m web-1 1/1 Running 0 4h11m [root@master1 ingress]# kubectl delete pods -n test ingress-nginx-controller-knjm6 pod "ingress-nginx-controller-knjm6" deleted [root@master1 ingress]# kubectl get pods -n test NAME READY STATUS RESTARTS AGE ingress-nginx-admission-create-z2xgq 0/1 Completed 0 9m13s ingress-nginx-admission-patch-qpnh7 0/1 Completed 2 9m13s ingress-nginx-controller-kc7km 1/1 Running 0 9m13s ingress-nginx-controller-mzqjn 1/1 Running 0 9m13s ingress-nginx-controller-r7knt 1/1 Running 0 12s ingress-nginx-controller-xcxsd 1/1 Running 0 9m13s nfs-client-provisioner-fb55999fb-pcrqt 1/1 Running 0 4h17m web-0 1/1 Running 0 4h11m web-1 1/1 Running 0 4h11m
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创建一个ingree，测试外网访问
查看当前svc
[root@master1 ingress]# kubectl get svc -n test NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE ingress-nginx-controller NodePort 10.96.117.202 <none> 80:32210/TCP,443:32008/TCP 11m ingress-nginx-controller-admission LoadBalancer 10.96.131.36 <pending> 443:32639/TCP 11m nginx ClusterIP None <none> 80/TCP 4h14m You have new mail in /var/spool/mail/root [root@master1 ingress]# kubectl get svc -n test nginx -oyaml apiVersion: v1 kind: Service metadata: annotations: kubectl.kubernetes.io/last-applied-configuration: | {"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"labels":{"app":"nginx"},"name":"nginx","namespace":"test"},"spec":{"clusterIP":"None","ports":[{"name":"web","port":80}],"selector":{"app":"nginx"}}} creationTimestamp: "2023-05-24T02:11:37Z" labels: app: nginx name: nginx namespace: test resourceVersion: "2499378" uid: a4584c4d-51ea-4bf0-b711-880090ad1dae spec: clusterIP: None clusterIPs: - None internalTrafficPolicy: Cluster ipFamilies: - IPv4 ipFamilyPolicy: SingleStack ports: - name: web port: 80 protocol: TCP targetPort: 80 selector: app: nginx sessionAffinity: None type: ClusterIP status: loadBalancer: {}
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创建ingress
cat > web-ing.yaml << EOF apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: web-ing namespace: test spec: rules: - host: web.example.com http: paths: - backend: service: name: nginx port: number: 80 path: / pathType: Prefix EOF
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应用
[root@master1 ingress]# kubectl apply -f web-ing.yaml
ingress.networking.k8s.io/web-ing created
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验证
# 确认部署
- Ingress-nginx-controller:
为了高可用，部署方式采用DaemonSet，所以集群内可调度的节点都会部署一个（master节点不可调度），并确认处于Runnning状态。
- Ingress-nginx-controller服务
使用NodePort方式，确认PORTS后面出现30000以上的本地端口
[root@master1 nfs-provisioner]# kubectl get pod,svc -n test NAME READY STATUS RESTARTS AGE pod/ingress-nginx-admission-create-z2xgq 0/1 Completed 0 67m pod/ingress-nginx-admission-patch-qpnh7 0/1 Completed 2 67m pod/ingress-nginx-controller-kc7km 1/1 Running 0 67m pod/ingress-nginx-controller-mzqjn 1/1 Running 0 67m pod/ingress-nginx-controller-r7knt 1/1 Running 0 58m pod/ingress-nginx-controller-xcxsd 1/1 Running 0 67m pod/nfs-client-provisioner-fb55999fb-pcrqt 1/1 Running 0 5h15m pod/web-0 1/1 Running 0 5h9m pod/web-1 1/1 Running 0 5h9m pod/web-7849c945f4-k9xzz 1/1 Running 0 21m pod/web-7849c945f4-x246j 1/1 Running 0 21m NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE service/ingress-nginx-controller NodePort 10.96.117.202 <none> 80:32210/TCP,443:32008/TCP 67m service/ingress-nginx-controller-admission LoadBalancer 10.96.131.36 <pending> 443:32639/TCP 67m service/nginx ClusterIP 10.96.6.151 <none> 80/TCP 21m [root@master1 nfs-provisioner]# telnet 10.140.20.142 32210 Trying 10.140.20.142... Connected to 10.140.20.142. Escape character is '^]'. ^CConnection closed by foreign host.
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访问验证
[root@master1 nfs-provisioner]# kubectl exec -n test web-7849c945f4-k9xzz -it bash kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl exec [POD] -- [COMMAND] instead. root@web-7849c945f4-k9xzz:/# ls /usr/share/nginx/html/ root@web-7849c945f4-k9xzz:/# root@web-7849c945f4-k9xzz:/# ls /usr/share/nginx/html/ root@web-7849c945f4-k9xzz:/# echo 1 > /usr/share/nginx/html/index.html root@web-7849c945f4-k9xzz:/# curl http://localhost/ 1 root@web-7849c945f4-k9xzz:/# exit [root@master1 nfs-provisioner]# kubectl get svc -n test NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE ingress-nginx-controller NodePort 10.96.117.202 <none> 80:32210/TCP,443:32008/TCP 51m ingress-nginx-controller-admission LoadBalancer 10.96.131.36 <pending> 443:32639/TCP 51m nginx ClusterIP 10.96.6.151 <none> 80/TCP 5m40s [root@master1 nfs-provisioner]# kubectl get ing -n test NAME CLASS HOSTS ADDRESS PORTS AGE web-ing nginx web.example.com 10.96.117.202 80 26m #登录k8s集群外的一台服务器做完hosts解析后进行验证 root@k8s-master1:~# tail -n 1 /etc/hosts 10.140.20.141 web.example.com root@k8s-master1:~# curl http://web.example.com 1
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