入口后端REST错误:服务器遇到临时错误，无法完成您的请求.请在30秒后重试 [英] Ingress backend REST error: The server encountered a temporary error and could not complete your request. Please try again in 30 seconds

问题描述

我正在google kubernetes引擎上部署应用程序. Applicaion有2个服务.我还尝试使用Ingress公开一项服务，并且ingress也用于https支持.我有1个NodePort服务网关"和ClusterIp服务内部".应该从网关访问内部".这是服务配置:

I am deploying application at google kubernetes engine. Applicaion has 2 services. There is also Ingress wich i am trying to use to expose one service and ingress also used for https support. I have 1 NodePort service "gateway" and ClusterIp service "internal". "Internal" should be accessed from gateway. Here is services config:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: x-ingress
  annotations:
    kubernetes.io/ingress.global-static-ip-name: x-x-ip
    kubernetes.io/tls-acme: "true"
  labels:
    app: gateway
spec:
  tls:
    - secretName: secret
      hosts:
      - x.x.com
  backend:
    serviceName: gateway
    servicePort: 80
---
apiVersion: certmanager.k8s.io/v1alpha1
kind: ClusterIssuer
metadata:
  name: x-x
spec:
  acme:
    server: https://acme-v01.api.letsencrypt.org/directory
    email: [e-mail]
    privateKeySecretRef:
      name: x-x
    http01: {}
---
apiVersion: v1
kind: Service
metadata:
  annotations:
    service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
  name: gateway
  labels:
    app: gateway
spec:
  type: NodePort
  ports:
  - port: 80
    name: gateway
    targetPort: 8080
  selector:
    app: gateway
---
apiVersion: v1
kind: Service
metadata:
  annotations:
    service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
  name: internal
  labels:
    app: internal
spec:
  ports:
  - port: 8082
    name: internal
    targetPort: 8082
  selector:
    app: internal

Gateway提供静态内容和REST资源.可以提供静态内容，所以我可以看到html以及图像和脚本.但是，当我尝试调用REST端点时，我收到了The server encountered a temporary error and could not complete your request. Please try again in 30 seconds.网关将REST请求转发到内部"服务并从内部返回响应的信息.网关访问内部服务，其URL为http://internal:8082/some/rest.当我调用任何请求时都会出错，该请求应转发到内部".

Gateway serve static content and REST resources. Static content is served ok, so i see html and images and scripts. But when i try to call REST endpoint i got The server encountered a temporary error and could not complete your request. Please try again in 30 seconds. Gateway forward REST request to "internal" service and return response from internal. Gateway access internal service with url http://internal:8082/some/rest. I got errors when i call any request wich should be forwarded to "internal".

实际上，我有没有Ingress的相同方案，并且可以工作. 网关"是LoadBalancer服务，内部"是NodePort.我需要Ingress作为https.

Actualy i have same scheme without Ingress and it works. "Gateway" is LoadBalancer service and "internal" is NodePort. I need Ingress for https.

UPD:我注意到我没有与8082端口有关的任何禁止规则，只有80和443(我使用过gcloud compute forwarding-rules list和gcloud compute forwarding-rules describe命令).

UPD: I noticed i don't have any forwading rules related to 8082 port, only 80 and 443( i have used gcloud compute forwarding-rules list and gcloud compute forwarding-rules describe commands).

此处是kubectl describe svc

Name:                     gateway
Namespace:                default
Labels:                   app=gateway
Annotations:              service.alpha.kubernetes.io/tolerate-unready-endpoints=true
Selector:                 app=gateway
Type:                     NodePort
IP:                       *
Port:                     gateway  80/TCP
TargetPort:               8080/TCP
NodePort:                 gateway  31168/TCP
Endpoints:                *:8080
Session Affinity:         None
External Traffic Policy:  Cluster
Events:                   <none>
---
Name:              internal
Namespace:         default
Labels:            app=internal
Annotations:       service.alpha.kubernetes.io/tolerate-unready-endpoints=true
Selector:          app=internal
Type:              ClusterIP
IP:                *
Port:              internal  8082/TCP
TargetPort:        8082/TCP
Endpoints:         *:8082
Session Affinity:  None
Events:            <none>

UPD2:这是问题网址的curl -v输出:

UPD2: Here is output of curl -v to problem url:

*   Trying *.*.*.*...
* TCP_NODELAY set
* Connected to *.*.*.* port 80 (#0)
> GET /internal/ping HTTP/1.1
> Host: *
> User-Agent: curl/7.52.1
> Accept: */*
> 
< HTTP/1.1 502 Bad Gateway
< Content-Type: text/html; charset=UTF-8
< Referrer-Policy: no-referrer
< Content-Length: 332
< Date: Sun, 04 Mar 2018 05:19:59 GMT
< 
<html><head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<title>502 Server Error</title>
</head>
<body text=#000000 bgcolor=#ffffff>
<h1>Error: Server Error</h1>
<h2>The server encountered a temporary error and could not complete your request.<p>Please try again in 30 seconds.</h2>
<h2></h2>
</body></html>
* Curl_http_done: called premature == 0
* Connection #0 to host trial.qurasense.com left intact

当请求此url时，网关日志中没有任何反应.

When this url requested, nothing happens in gateway logs.

推荐答案

问题出在网关应用程序和Ingress的结合中，我意识到网关应用程序的版本已经开始起作用

Problem was in gateway application and Ingress combination, i upgraged gateway application version and it started to work

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