Google Kubernetes Engine Ingress无法正常运作

时间:2019-06-19 05:02:07

标签: kubernetes google-cloud-platform google-kubernetes-engine

按照GKE上的“ Kubernetes in Action”一书的指南创建入口,但是该入口无效,可以从Ingress的公共IP地址进行访问。

  1. 创建副本集以创建pod。
  2. 创建服务。 (遵循“ Kubernetes in Action”上的nodeport方法。)
  3. 创建入口。

ReplicaSet,Service,Ingress已成功创建,可以从公共IP地址访问节点端口,而入口中不会出现异常。

复制案例:

apiVersion: apps/v1beta2
kind: ReplicaSet
metadata:
  name: kubia
spec:
  replicas: 3
  selector:
    matchLabels:
      app: kubia
  template:
    metadata:
        labels:
          app: kubia
    spec:
      containers:
      - name: kubia
        image: sonyfaye/kubia

服务:

apiVersion: v1
kind: Service
metadata:
  name: kubia-nodeport
spec:
  type: NodePort
  ports:
  - port: 80
    targetPort: 8080
    nodePort: 30123
  selector:
    app: kubia

入口:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: kubia
spec:
  rules:
  - host: kubia.example.com
    http:
      paths:
      - path: /
        backend: 
          serviceName: kubia-nodeport
          servicePort: 80

可以从公共IP地址访问节点端口本身。

C:\ kube> kubectl获取svc

NAME             TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE
kubernetes       ClusterIP   10.59.240.1    <none>        443/TCP        8d
kubia-nodeport   NodePort    10.59.253.10   <none>        80:30123/TCP   20h

C:\ kube> kubectl获取节点

NAME                                   STATUS   ROLES    AGE   VERSION
gke-kubia-default-pool-08dd2133-qbz6   Ready    <none>   8d    v1.12.8-gke.6
gke-kubia-default-pool-183639fa-18vr   Ready    <none>   8d    v1.12.8-gke.6
gke-kubia-default-pool-42725220-43q8   Ready    <none>   8d    v1.12.8-gke.6

C:\ kube> kubectl获取节点-o宽

NAME                                   STATUS   ROLES    AGE   VERSION         INTERNAL-IP   EXTERNAL-IP      OS-IMAGE                             KERNEL-VERSION   CONTAINER-RUNTIME
gke-kubia-default-pool-08dd2133-qbz6   Ready    <none>   8d    v1.12.8-gke.6   10.140.0.17   35.201.224.238   Container-Optimized OS from Google   4.14.119+        docker://17.3.2
gke-kubia-default-pool-183639fa-18vr   Ready    <none>   8d    v1.12.8-gke.6   10.140.0.18   35.229.152.12    Container-Optimized OS from Google   4.14.119+        docker://17.3.2
gke-kubia-default-pool-42725220-43q8   Ready    <none>   8d    v1.12.8-gke.6   10.140.0.16   34.80.225.64     Container-Optimized OS from Google   4.14.119+        docker://17.3.2

C:\ kube>卷曲http://34.80.225.64:30123

You've hit kubia-j2lnr

但是无法从外部访问入口。

主机文件:

34.98.92.110 kubia.example.com

C:\ kube> kubectl描述入口

Name:             kubia
Namespace:        default
Address:          34.98.92.110
Default backend:  default-http-backend:80 (10.56.0.7:8080)
Rules:
  Host               Path  Backends
  ----               ----  --------
  kubia.example.com
                     /   kubia-nodeport:80 (10.56.0.14:8080,10.56.1.6:8080,10.56.3.4:8080)
Annotations:
  ingress.kubernetes.io/backends:         {"k8s-be-30123--c4addd497b1e0a6d":"HEALTHY","k8s-be-30594--c4addd497b1e0a6d":"HEALTHY"}
  ingress.kubernetes.io/forwarding-rule:  k8s-fw-default-kubia--c4addd497b1e0a6d
  ingress.kubernetes.io/target-proxy:     k8s-tp-default-kubia--c4addd497b1e0a6d
  ingress.kubernetes.io/url-map:          k8s-um-default-kubia--c4addd497b1e0a6d
Events:    

                               <none>

C:\ kube>卷曲http://kubia.example.com

curl: (7) Failed to connect to kubia.example.com port 80: Timed out

C:\ kube> telnet kubia.example.com 80

Connecting To kubia.example.com...

C:\ kube> telnet 34.98.92.110 80

Connecting To 34.98.92.110...Could not open connection to the host, on port 80: Connect failed

从Intranet尝试过。 curl 34.98.92.110 IP可以获取一些结果,并且可以从Intranet访问34.98.92.110的80个端口。

C:\ kube> kubectl exec -it kubia-lrt9x bash

root@kubia-lrt9x:/# curl http://kubia.example.com
curl: (6) Could not resolve host: kubia.example.com

root @ kubia-lrt9x:/#curl http://34.98.92.110 default backend - 404 root @ kubia-lrt9x:/#curl http://34.98.92.110 default backend - 404 root @ kubia-lrt9x:/# root @ kubia-lrt9x:/#curl http://10.56.0.7:8080 default backend - 404 root @ kubia-lrt9x:/#

有人知道如何调试吗?

已将节点端口添加到防火墙,否则无法访问节点端口。似乎不需要将Ingress IP添加到防火墙。

1 个答案:

答案 0 :(得分:0)

尝试公开副本集以便能够从外部进行连接:

$ kubectl expose rs hello-world --type=NodePort --name=my-service

请记住首先删除服务kubia-nodeport,并在Ingress配置文件中删除带有服务的选择器和节,然后使用 kubectl apply 命令应用更改。

您可以在这里找到更多信息:exposing-externalip

有用的文档:kubectl-expose