Question

我很难弄清楚为什么GKE上的入口会在项目部署期间返回502错误和超时。

为了更好地理解这个问题，我设置了一个基本的hello application，它采用相同的工作流程。

这是完整的清单：

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: helloapp
  labels:
    app: helloapp
spec:
  replicas: 3
  template:
    metadata:
      labels:
        app: helloapp
    spec:
      containers:
      - name: helloapp
        image: gcr.io/${GCLOUD_PROJECT_ID}/helloapp:${HELLOAPP_VERSION}
        imagePullPolicy: Always
        ports:
        - name: http-server
          containerPort: 8080

        readinessProbe:
          httpGet:
            path: /sys/health
            port: 8080

        livenessProbe:
          httpGet:
            path: /sys/health
            port: 8080

---

apiVersion: v1
kind: Service
metadata:
  name: helloapp
  labels:
    app: helloapp
spec:
  type: NodePort
  externalTrafficPolicy: Local
  ports:
    - port: 80
      targetPort: http-server
  selector:
    app: helloapp

---

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: helloapp-http
spec:
  backend:
    serviceName: helloapp
    servicePort: 80

包含入口，服务和自定义探针。

该应用程序是用Go编写的简单的hello world应用程序。

在部署期间，如果我围攻我的应用程序的入口健康检查，我注意到：

HTTP/1.1 502     9.02 secs:     332 bytes ==> GET  /sys/health
HTTP/1.1 502     9.10 secs:     332 bytes ==> GET  /sys/health
HTTP/1.1 200     4.70 secs:     473 bytes ==> GET  /sys/health
HTTP/1.1 200     4.56 secs:     475 bytes ==> GET  /sys/health
HTTP/1.1 200     0.01 secs:     475 bytes ==> GET  /sys/health
HTTP/1.1 200     0.01 secs:     476 bytes ==> GET  /sys/health
HTTP/1.1 200     0.03 secs:     475 bytes ==> GET  /sys/health
HTTP/1.1 200     0.01 secs:     474 bytes ==> GET  /sys/health
HTTP/1.1 200     4.58 secs:     475 bytes ==> GET  /sys/health
HTTP/1.1 200     4.51 secs:     474 bytes ==> GET  /sys/health
HTTP/1.1 200     0.01 secs:     475 bytes ==> GET  /sys/health
HTTP/1.1 200     0.01 secs:     475 bytes ==> GET  /sys/health
HTTP/1.1 200     4.83 secs:     474 bytes ==> GET  /sys/health
HTTP/1.1 502     9.07 secs:     332 bytes ==> GET  /sys/health
HTTP/1.1 200     0.02 secs:     475 bytes ==> GET  /sys/health

几分钟后（通常为5-10），它会正确停止并转发请求。

群集信息：

Kubernetes版本：1.8.8
Google云平台
G1-小

Answer 1

你的配置一切都很好。您的go-app启动期间看起来有问题：对您的服务进行循环处理会向pod中的未启动应用发送一些请求，这会导致代码502出错。

您的应用在广告连播中开始了多长时间？您可以添加initialDelaySeconds来修复错误。

spec:
  replicas: 3
  template:
    metadata:
      labels:
        app: helloapp
    spec:
      containers:
      - name: helloapp
        image: gcr.io/${GCLOUD_PROJECT_ID}/helloapp:${HELLOAPP_VERSION}
        imagePullPolicy: Always
        ports:
        - name: http-server
          containerPort: 8080

        readinessProbe:
          httpGet:
            path: /sys/health
            port: 8080
            initialDelaySeconds: 60

        livenessProbe:
          httpGet:
            path: /sys/health
            port: 8080
            initialDelaySeconds: 120

kubernetes在GKE超时时进入，在部署期间为502

1 个答案: