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无法在命名空间：[my-namespace] 中读取名称为：[my-configmap] 的 configMap无视

分类：编程问答

如何解决无法在命名空间：[my-namespace] 中读取名称为：[my-configmap] 的 configMap无视

部署 spring 应用程序只能在默认命名空间中工作。将同一应用程序部署到其他命名空间失败，并显示以下错误：

我注意到这与默认命名空间中的服务（名为：Kubernetes）有关，该命名空间的 clusterIP 为 10.242.0.1。将应用程序部署到其他命名空间仍会路由到默认命名空间中的此 Kubernetes 服务。将服务链接添加到此服务无济于事。使用其他命名空间中的端点创建此服务的副本也不能解决问题。

2021-05-13 11:46:24.514  WARN [some-service,] 1 --- [           main] s.c.k.f.c.Fabric8ConfigMapPropertySource : Can't read configMap with name: [my-configmap] in namespace:[my-namespace]. Ignoring.

io.fabric8.kubernetes.client.KubernetesClientException: Operation: [get]  for kind: [ConfigMap]  with name: [my-configmap]  in namespace: [my-namespace]  Failed.
        at io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:64) ~[kubernetes-client-4.13.2.jar:na]
        at io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:72) ~[kubernetes-client-4.13.2.jar:na]
        at io.fabric8.kubernetes.client.dsl.base.BaSEOperation.getMandatory(BaSEOperation.java:225) ~[kubernetes-client-4.13.2.jar:na]
        at io.fabric8.kubernetes.client.dsl.base.BaSEOperation.get(BaSEOperation.java:186) ~[kubernetes-client-4.13.2.jar:na]
        at io.fabric8.kubernetes.client.dsl.base.BaSEOperation.get(BaSEOperation.java:84) ~[kubernetes-client-4.13.2.jar:na]
        at org.springframework.cloud.kubernetes.fabric8.config.Fabric8ConfigMapPropertySource.getData(Fabric8ConfigMapPropertySource.java:62) [spring-cloud-kubernetes-fabric8-config-2.0.2.jar:2.0.2]
        at org.springframework.cloud.kubernetes.fabric8.config.Fabric8ConfigMapPropertySource.<init>(Fabric8ConfigMapPropertySource.java:50) [spring-cloud-kubernetes-fabric8-config-2.0.2.jar:2.0.2]
        at org.springframework.cloud.kubernetes.fabric8.config.Fabric8ConfigMapPropertySourceLocator.getMapPropertySource(Fabric8ConfigMapPropertySourceLocator.java:51) [spring-cloud-kubernetes-fabric8-config-2.0.2.jar:2.0.2]
        at org.springframework.cloud.kubernetes.commons.config.ConfigMapPropertySourceLocator.getMapPropertySourceForSingleConfigMap(ConfigMapPropertySourceLocator.java:81) [spring-cloud-kubernetes-commons-2.0.2.jar:2.0.2]
        at org.springframework.cloud.kubernetes.commons.config.ConfigMapPropertySourceLocator.lambda$locate$0(ConfigMapPropertySourceLocator.java:67) [spring-cloud-kubernetes-commons-2.0.2.jar:2.0.2]
        at java.util.ArrayList.forEach(ArrayList.java:1259) ~[na:1.8.0_282]
        at org.springframework.cloud.kubernetes.commons.config.ConfigMapPropertySourceLocator.locate(ConfigMapPropertySourceLocator.java:67) [spring-cloud-kubernetes-commons-2.0.2.jar:2.0.2]
        at org.springframework.cloud.bootstrap.config.PropertySourceLocator.locateCollection(PropertySourceLocator.java:51) ~[spring-cloud-context-3.0.2.jar:3.0.2]
        at org.springframework.cloud.bootstrap.config.PropertySourceLocator.locateCollection(PropertySourceLocator.java:47) ~[spring-cloud-context-3.0.2.jar:3.0.2]
        at org.springframework.cloud.bootstrap.config.PropertySourceBootstrapConfiguration.initialize(PropertySourceBootstrapConfiguration.java:95) ~[spring-cloud-context-3.0.2.jar:3.0.2]
        at org.springframework.boot.SpringApplication.applyInitializers(SpringApplication.java:650) ~[spring-boot-2.4.5.jar:2.4.5]
        at org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:403) ~[spring-boot-2.4.5.jar:2.4.5]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:338) ~[spring-boot-2.4.5.jar:2.4.5]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1340) ~[spring-boot-2.4.5.jar:2.4.5]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1329) ~[spring-boot-2.4.5.jar:2.4.5]
        at com.ubs.wma.service.accountgroup.AccountGroupServiceApplication.main(AccountGroupServiceApplication.java:19) ~[classes/:na]
Caused by: java.net.ConnectException: Failed to connect to /10.242.0.1:443
        at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:265) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:183) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.connection.ExchangeFinder.findConnection(ExchangeFinder.java:224) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.connection.ExchangeFinder.findHealthyConnection(ExchangeFinder.java:108) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.connection.ExchangeFinder.find(ExchangeFinder.java:88) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.connection.Transmitter.newExchange(Transmitter.java:169) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:41) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:94) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:88) ~[okhttp-3.14.9.jar:na]
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117) ~[okhttp-3.14.9.jar:na]
        at io.fabric8.kubernetes.client.utils.BackwardsCompatibilityInterceptor.intercept(BackwardsCompatibilityInterceptor.java:133) ~[kubernetes-client-4.13.2.jar:na]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117) ~[okhttp-3.14.9.jar:na]
        at io.fabric8.kubernetes.client.utils.OIDCTokenRefreshInterceptor.intercept(OIDCTokenRefreshInterceptor.java:41) ~[kubernetes-client-4.13.2.jar:na]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117) ~[okhttp-3.14.9.jar:na]
        at io.fabric8.kubernetes.client.utils.ImpersonatorInterceptor.intercept(ImpersonatorInterceptor.java:68) ~[kubernetes-client-4.13.2.jar:na]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117) ~[okhttp-3.14.9.jar:na]
        at io.fabric8.kubernetes.client.utils.HttpClientUtils.lambda$createHttpClient$3(HttpClientUtils.java:151) ~[kubernetes-client-4.13.2.jar:na]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117) ~[okhttp-3.14.9.jar:na]
        at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:229) ~[okhttp-3.14.9.jar:na]
        at okhttp3.RealCall.execute(RealCall.java:81) ~[okhttp-3.14.9.jar:na]
        at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:472) ~[kubernetes-client-4.13.2.jar:na]
        at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:435) ~[kubernetes-client-4.13.2.jar:na]
        at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleGet(OperationSupport.java:402) ~[kubernetes-client-4.13.2.jar:na]
        at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleGet(OperationSupport.java:384) ~[kubernetes-client-4.13.2.jar:na]
        at io.fabric8.kubernetes.client.dsl.base.BaSEOperation.handleGet(BaSEOperation.java:935) ~[kubernetes-client-4.13.2.jar:na]
        at io.fabric8.kubernetes.client.dsl.base.BaSEOperation.getMandatory(BaSEOperation.java:220) ~[kubernetes-client-4.13.2.jar:na]
        ... 18 common frames omitted
Caused by: java.net.ConnectException: Connection refused (Connection refused)
        at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_282]
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_282]
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_282]
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_282]
        at java.net.socksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_282]
        at java.net.socket.connect(Socket.java:607) ~[na:1.8.0_282]
        at okhttp3.internal.platform.Platform.connectSocket(Platform.java:130) ~[okhttp-3.14.9.jar:na]
        at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:263) ~[okhttp-3.14.9.jar:na]
        ... 54 common frames omitted

将 Role 和 RoleBinding 资源添加到我的部署中，如下所示：

kind: Role
apiVersion: rbac.authorization.k8s.io/v1
Metadata:
  name: namespace-reader
rules:
  - apiGroups: ["","extensions","apps"]
    resources: ["configmaps","pods","services","endpoints","secrets"]
    verbs: ["get","list","watch"]

---

kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
Metadata:
  name: namespace-reader-binding
  namespace: default
subjects:
  - kind: ServiceAccount
    name: default
    apiGroup: ""
roleRef:
  kind: Role
  name: namespace-reader
  apiGroup: ""

我的 bootstrap.yaml 配置如下所示：

spring:
  cloud:
    kubernetes:
      config:
        sources:
          - name: some-service
        namespace: ${MY_POD_NAMESPACE}

我的服务部署如下所示：

apiVersion: apps/v1
kind: Deployment
Metadata:
  name: some-service
spec:
  selector:
    matchLabels:
      app: some-service
  template:
    Metadata:
      labels:
        app: some-service
    spec:
      containers:
        - name: some-service
          image: registry/some-service:latest
          resources:
            requests:
              memory: 320Mi
            limits:
              memory: 512Mi
          ports:
            - containerPort: 8080
          env:
            - name: SPRING_PROFILES_ACTIVE
              value: "some-profile"
            - name: MY_POD_NAMESPACE
              valueFrom:
                fieldRef:
                  fieldpath: Metadata.namespace
          livenessProbe:
            httpGet:
              path: /actuator/health/liveness
              port: 8080
            initialDelaySeconds: 40
          readinessProbe:
            httpGet:
              path: /actuator/health/readiness
              port: 8080
            initialDelaySeconds: 40
          lifecycle:
            preStop:
              exec:
                command: [ "sh","-c","sleep 10" ]

最后，我的 configmap 如下所示：

apiVersion: v1
data:
  application-properties.yaml: 'property: "value"'
kind: ConfigMap
Metadata:
  labels:
    app.kubernetes.io/managed-by: Helm
  name: my-configmap

解决方法

我找到了适合我的解决方法。为我的命名空间 my-namespace 创建了一个管理员集群角色绑定资源，如下所示：

kubectl create clusterrolebinding admin-my-namespace --clusterrole=cluster-admin --serviceaccount=my-namespace:default

删除了 Role 和 RoleBinding 资源，因为它们不再需要了。

这行得通，但首先会理解为什么角色和角色绑定到 ServiceAccount 是不够的。

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