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JMD's questions

Martin Hope
JMD
Asked: 2025-02-04 01:56:40 +0800 CST
  • 5

我有 2 个应用程序。一个是配置服务器，另一个是使用配置服务器数据的 business-logic-app。它们都在 Kubernetes 中的同一命名空间上运行（我的笔记本电脑上的 kubectl）。但是，当 business-logic-app 连接到配置服务器时，我收到连接超时异常，这导致 livenessProbe 和 readinessProbe 失败。我遗漏了什么？

配置服务器.yaml

# Config server
apiVersion: apps/v1
kind: Deployment
metadata:
  name: kubernetes-learning-config-server
  namespace: kubernetes-learning
  labels:
    app: kubernetes-learning-config-server
spec:
  replicas: 2
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1
  selector:
    matchLabels:
      app: kubernetes-learning-config-server
  template:
    metadata:
      name: kubernetes-learning-config-server
      labels:
        app: kubernetes-learning-config-server
    spec:
      containers:
        - name: kubernetes-learning-config-server
          image: ghcr.io/kubernetes/learning.config-server
          imagePullPolicy: Always
          ports:
            - containerPort: 8888
              protocol: TCP
            - containerPort: 48888
              protocol: TCP
          env:
            - name: BPL_JVM_THREAD_COUNT
              value: "50"
            - name: BPL_DEBUG_ENABLED
              value: "true"
            - name: BPL_DEBUG_PORT
              value: "48888"
            - name: GITHUB_CONFIG_DATA_URL
              value: https://github.com/kubernetes/config-data
            - name: GITHUB_CONFIG_DATA_USERNAME
              value: github_user
            - name: GITHUB_CONFIG_DATA_PERSONAL_ACCESS_TOKEN
              value: github_sampletoken  
          livenessProbe:
            httpGet:
              path: /alpha-app/local
              port: 8888
            initialDelaySeconds: 30
            periodSeconds: 20
            timeoutSeconds: 10
            successThreshold: 1
            failureThreshold: 3
          readinessProbe:
            httpGet:
              path: /alpha-app/local
              port: 8888
            initialDelaySeconds: 30
            periodSeconds: 20
            timeoutSeconds: 10
            successThreshold: 1
            failureThreshold: 3

      restartPolicy: Always

# Expose Config server
---
apiVersion: v1
kind: Service
metadata:
  name: kubernetes-learning-config-server
  labels:
    app: kubernetes-learning-config-server
spec:
  type: ClusterIP
  selector:
    app: kubernetes-learning-config-server
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8888

alpha-应用程序.yaml

# app applications
apiVersion: apps/v1
kind: Deployment
metadata:
  name: kubernetes-learning-app
  namespace: kubernetes-learning
  labels:
    app: kubernetes-learning-app
spec:
  replicas: 1
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1
  selector:
    matchLabels:
      app: kubernetes-learning-app
  template:
    metadata:
      name: kubernetes-learning-app
      labels:
        app: kubernetes-learning-app
    spec:
      containers:
        - name: kubernetes-learning-alpha-app
          image: ghcr.io/kubernetes/learning.alpha-app
          imagePullPolicy: Always
          ports:
            - containerPort: 8441
              protocol: TCP
            - containerPort: 48441
              protocol: TCP
          env:
            - name: BPL_JVM_THREAD_COUNT
              value: "50"
            - name: BPL_DEBUG_ENABLED
              value: "true"
            - name: BPL_DEBUG_PORT
              value: "48441"
            - name: SPRING_PROFILES_ACTIVE
              value: kube
            - name: SPRING_CLOUD_CONFIG_FAIL_FAST
              value: "true"
            - name: SPRING_CLOUD_CONFIG_RETRY_INITIAL_INTERVAL
              value: "1000"
            - name: SPRING_CLOUD_CONFIG_RETRY_MAX_INTERVAL
              value: "10000"
            - name: SPRING_CLOUD_CONFIG_RETRY_MULTIPLIER
              value: "2"
            - name: SPRING_CLOUD_CONFIG_RETRY_MAX_ATTEMPTS
              value: "5"
            - name: SPRING_CLOUD_CONFIG_URI
              value: http://kubernetes-learning-config-server:8888
          livenessProbe:
            httpGet:
              path: /info
              port: 8441
            initialDelaySeconds: 60
            timeoutSeconds: 15
            periodSeconds: 30
            successThreshold: 1
            failureThreshold: 3
          readinessProbe:
            httpGet:
              path: /info
              port: 8441
            initialDelaySeconds: 60
            timeoutSeconds: 15
            periodSeconds: 30
            successThreshold: 1
            failureThreshold: 3

      restartPolicy: Always


# Expose Config server
---
apiVersion: v1
kind: Service
metadata:
  name: kubernetes-learning-app
  labels:
    app: kubernetes-learning-app
spec:
  type: ClusterIP
  selector:
    app: kubernetes-learning-app
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8441

例外

Caused by: org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://kubernetes-learning-config-server:8888/alpha-app/kube": Connect timed out
    at org.springframework.web.client.RestTemplate.createResourceAccessException(RestTemplate.java:926) ~[spring-web-6.2.1.jar:6.2.1]
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:906) ~[spring-web-6.2.1.jar:6.2.1]
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:801) ~[spring-web-6.2.1.jar:6.2.1]
    at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:683) ~[spring-web-6.2.1.jar:6.2.1]
    at org.springframework.cloud.config.client.ConfigServerConfigDataLoader.getRemoteEnvironment(ConfigServerConfigDataLoader.java:349) ~[spring-cloud-config-client-4.2.0.jar:4.2.0]
    at org.springframework.cloud.config.client.ConfigServerConfigDataLoader.doLoad(ConfigServerConfigDataLoader.java:130) ~[spring-cloud-config-client-4.2.0.jar:4.2.0]
    ... 37 common frames omitted
Caused by: java.net.SocketTimeoutException: Connect timed out
    at java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(Unknown Source) ~[na:na]
    at java.base/sun.nio.ch.NioSocketImpl.connect(Unknown Source) ~[na:na]
    at java.base/java.net.Socket.connect(Unknown Source) ~[na:na]
    at java.base/sun.net.NetworkClient.doConnect(Unknown Source) ~[na:na]
    at java.base/sun.net.www.http.HttpClient.openServer(Unknown Source) ~[na:na]
    at java.base/sun.net.www.http.HttpClient.openServer(Unknown Source) ~[na:na]
    at java.base/sun.net.www.http.HttpClient.<init>(Unknown Source) ~[na:na]
    at java.base/sun.net.www.http.HttpClient.New(Unknown Source) ~[na:na]
    at java.base/sun.net.www.http.HttpClient.New(Unknown Source) ~[na:na]
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source) ~[na:na]
    at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(Unknown Source) ~[na:na]
    at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source) ~[na:na]
    at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source) ~[na:na]
    at org.springframework.http.client.SimpleClientHttpRequest.executeInternal(SimpleClientHttpRequest.java:79) ~[spring-web-6.2.1.jar:6.2.1]
    at org.springframework.http.client.AbstractStreamingClientHttpRequest.executeInternal(AbstractStreamingClientHttpRequest.java:71) ~[spring-web-6.2.1.jar:6.2.1]
    at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:81) ~[spring-web-6.2.1.jar:6.2.1]
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:900) ~[spring-web-6.2.1.jar:6.2.1]
    ... 41 common frames omitted
spring-boot