kubernetes入口总是返回503

Question

我在我的计算机上部署了kubernetes，并配置了pod、service和ingress。我卷曲了我配置的域，但得到了503错误。原因是什么
操作系统：Mac OSX 10.15.3
Docker版本：19.03.8
pod：

apiVersion: v1
kind: Pod
metadata:
name: opengateway
namespace: openplatform
spec:
containers:
- name: opengateway
image: "karldoenitz/opengateway:1.0"
ports:
- containerPort: 8000
hostPort: 8000
env:
- name: etcdiport
valueFrom:
configMapKeyRef:
name: openplatform
key: etcd-iport
imagePullPolicy: IfNotPresent

服务

apiVersion: v1
kind: Service
metadata:
name: webgateway
namespace: openplatform
spec:
ports:
- port: 8000
targetPort: 8000
selector:
app: opengateway

入口

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: openplatform-web-gateway
namespace: openplatform
spec:
rules:
- host: open.platform.com
http:
paths:
- path: /
backend:
serviceName: webgateway
servicePort: 8000

描述svc-webgateway-n开放平台

Name:              webgateway
Namespace:         openplatform
Labels:            <none>
Annotations:       kubectl.kubernetes.io/last-applied-configuration:
{"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"name":"webgateway","namespace":"openplatform"},"spec":{"ports":[{"port":...
Selector:          app=opengateway
Type:              ClusterIP
IP:                10.109.103.73
Port:              <unset>  8000/TCP
TargetPort:        8000/TCP
Endpoints:         <none>
Session Affinity:  None
Events:            <none>

入口控制器的日志：

192.168.65.3 - - [26/Apr/2020:08:58:37 +0000] "GET /favicon.ico HTTP/1.1" 503 599 "http://open.platform.com/ping" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36" 388 0.000 [openplatform-openplatform-web-gateway-30001] [] - - - - 086d5a61011485f8fa69dca25afd93ae

所有的吊舱、服务和入口都在运行。我运行命令curl http://open.platform.com，得到错误503 Service Temporarily Unavailable。怎么了？

Answer 1

所以这里的问题是服务有一个标签选择器，它选择标签为app: opengateway的pod，但pod没有这个标签。因此，服务中的Endpoints是空的，并且不具有POD IP。在吊舱中添加标签app: opengateway应该可以解决这个问题

apiVersion: v1
kind: Pod
metadata:
name: opengateway
namespace: openplatform
labels:
app: opengateway
spec:
containers:
- name: opengateway
image: "karldoenitz/opengateway:1.0"
ports:
- containerPort: 8000
hostPort: 8000
env:
- name: etcdiport
valueFrom:
configMapKeyRef:
name: openplatform
key: etcd-iport
imagePullPolicy: IfNotPresent