就绪探测失败：获取 http://10.32.1.71:80/setting s：net/http：请求已取消（Client.Timeout 在等待 headers 时超出）

Question

我的配置是Jenkins on Kubernetes，项目写在PHP.

这里的问题是 pod 附加到入口（而不是在使用 GCE 的 loadBalancer 上）并且当 pod 不健康时它不会添加它。

我第一次从 0 加载项目，它在我更新它后工作，但由于它不健康而失败。

当我描述 pod 时，我收到以下警告：

Readiness probe failed: Get http://10.32.1.71:80/setting s: net/http: request canceled (Client.Timeout exceeded while awaiting headers)

我的生产配置：

# Configuration for the SQL connection 
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
  name: wobbl-main-backend-production
spec:
  replicas: 1
  template:
    metadata:
      name: backend
      labels:
        app: wobbl-main
        role: backend
        env: production
    spec:
      containers:
        - name: backend
          image: gcr.io/cloud-solutions-images/wobbl-mobile-backend:1.0.0
          resources:
            limits:
              memory: "500Mi"
              cpu: "100m"
          imagePullPolicy: Always
          readinessProbe:
            httpGet: # make an HTTP request
              port: 80 # port to use
              path: /settings # endpoint to hit
              scheme: HTTP # or HTTPS
            initialDelaySeconds: 3 # how long to wait before checking
            periodSeconds: 5 # how long to wait between checks
            successThreshold: 1 # how many successes to hit before accepting
            failureThreshold: 2 # how many failures to accept before failing
            timeoutSeconds: 10 # how long to wait for a response
          ports:
          - name: backend
            containerPort: 80

有关如何解决此问题的任何提示。

Answer 1

错误消息表明您的 HTTP 请求不成功。就绪探测需要成功才能将 pod 添加为公开它的服务的端点。

1) kubectl get po -o wide

这样您就可以获得 pod 的集群 IP

2) kubectl exec -t [another_pod] -- curl -I [pod's cluster IP]

如果您收到 200 响应，则您知道路径配置正确并且就绪探测应该通过。如果您收到的不是 200 响应，这就是就绪探测失败的原因，您需要检查您的图像。

Answer 2

来自github.com/kubernetes/kubernetes/issues/89898

的解决方法

您可能希望将 httpGet 更改为 exec / command / curl:

      ...
      readinessProbe:
        exec:
          command:
          - "curl"
          - "--fail"
          - "-o"
          - "/dev/null"
          - "http://localhost/settings"
        initialDelaySeconds: 3
        periodSeconds: 5
        successThreshold: 1
        failureThreshold: 2
        timeoutSeconds: 10

就绪探测失败：获取 http://10.32.1.71:80/setting s：net/http：请求已取消（Client.Timeout 在等待 headers 时超出）

Readiness probe failed: Get http://10.32.1.71:80/setting s: net/http: request canceled (Client.Timeout exceeded while awaiting headers)

google-compute-engine

kubernetes

google-kubernetes-engine

kubernetes-health-check