无法读取名称的configmap:[xx]在命名空间['default']忽略

Question

新的K8S。

尝试从基于配置文件的配置映射读取值。我的configmap存在于默认名称空间中。但是，Spring Boot并未选择值。

配置地图看起来像：

apiVersion: v1
kind: ConfigMap
metadata:
    name: example-configmap-overriding-new-01
data:
    application.properties: |-
        globalkey = global key value
    application-qa.properties: |-
        globalkey = global key qa value    
    application-prod.properties: |-
        globalkey = global key prod value

配置映射也是在默认名称空间中创建的。

kubectl get configmap -n default 
NAME                                  DATA   AGE
example-configmap-overriding-new-01   3      8d

我的部署文件看起来像

apiVersion: apps/v1
kind: Deployment
metadata: 
    name: demo-configmapk8testing
spec:  
    selector:
        matchLabels:
            app: demo-configmapk8testing
replicas: 1
template: 
    metadata:
        labels:
            app: demo-configmapk8testing        
    spec:
        containers:
          - name: demo-configmapk8testing
            image: Path to image
            ports:
            - containerPort: 8080
            args: [
            "--spring.profiles.active=prod",
            "--spring.application.name=example-configmap-overriding-new-01",
            "--spring.cloud.kubernetes.config.name=example-configmap-
            overriding-new-01",
            "--spring.cloud.kubernetes.config.namespace=default",
            "--spring.cloud.kubernetes.config.enabled=true"]
            envFrom:
            - configMapRef:
                name: example-configmap-overriding-new-01

但是弹簧靴记录说： -

2019-07-02 22:10:38.092  WARN 1 --- [           main] 
o.s.c.k.config.ConfigMapPropertySource   : Can't read configMap with name: 
[example-configmap-overriding-new-01] in namespace:[default]. Ignoring
2019-07-02 22:10:38.331  INFO 1 --- [           main] 
b.c.PropertySourceBootstrapConfiguration : Located property source: 
CompositePropertySource {name='composite-configmap', propertySources= 
[ConfigMapPropertySource {name='configmap.example-configmap-overriding-new- 
01.default'}]}
2019-07-02 22:10:38.420  INFO 1 --- [           main] 
b.c.PropertySourceBootstrapConfiguration : Located property source: 
SecretsPropertySource {name='secrets.example-configmap-overriding-new- 
01.default'}
2019-07-02 22:10:38.692  INFO 1 --- [           main] 
c.e.c.ConfigconsumerApplication          : **The following profiles are 
active: prod**
--some logs--
Injection of autowired dependencies failed; nested exception is 
java.lang.IllegalArgumentException: **Could not resolve placeholder 
'globalkey' in value "${globalkey}"**

我的春季启动配置文件看起来像

@Configuration
public class ConfigConsumerConfig {
    @Value(value = "${globalkey}")
    private String globalkey;
    // with getter and setters 
}

我的pom.xml也具有以下依赖性。

    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-kubernetes-config</artifactId>
        <version>1.0.2.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-configuration-processor</artifactId>
        <optional>true</optional>
    </dependency>

我在本地机器中运行Minikube。我在这里错过了什么吗？

有人可以在这里共享一些输入。

Answer 1

spring-cloud-kubernetes 无法访问Kubernetes API，因此无法读取ConfigMap。查看此文档以获取更多详细信息：https：//github.com/spring-cloud/spring-cloud-kubernetes/blob/master/master/docs/src/main/main/asciidoc/security-service-service-service-service-accounts.adoc。

简而言之，应用此配置，它可以正常工作：

kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  namespace: YOUR-NAME-SPACE
  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: YOUR-NAME-SPACE
subjects:
- kind: ServiceAccount
  name: default
  apiGroup: ""
roleRef:
  kind: Role
  name: namespace-reader
  apiGroup: ""

您可以在此处更详细地阅读有关角色和角色的角色：https：//kubernetes.io/docs/reference/access-authn-authz/rbac/。

注意：您不必创建卷和音量安装。我会说这是另一种选择。如果您想这样拥有它，则必须在Spring Boot应用程序配置中指定spring.cloud.kubernetes.config.paths(我已将其写入 Bootstrap.yaml 资源文件中(。例如

spring: 
  cloud:
    kubernetes:
      config:
        paths: /etc/config/application.yaml

然后通过Kubernetes部署配置创建ConfigMap卷并将其安装在该路径上。在我们的示例中，路径将是/etc/config 。

让我知道它是否适合您：(

Answer 2

configmap清单需要纠正。格式不正确

尝试这个

apiVersion: v1
kind: ConfigMap
metadata:
  name: example-configmap-overriding-new-01
data:
  application.properties: |
    globalkey=global-key-value
  application-qa.properties: |
    globalkey=global-key-qa-value
  application-prod.properties: |
    globalkey=global-key-prod-value

您应该将configmap安装为卷，以在应用程序中使用配置文件

          volumeMounts:
          - name: config
            mountPath: /config
        volumes:
        - name: config
          configMap:        
            name: example-configmap-overriding-new-01

Answer 3

只是要删除提示，以防任何人面对与我的根本原因相同的根本原因：https_proxy设置。

我们的项目在部署配置中具有http/https_proxy，spring kubernetes客户端对象正在尝试通过IP地址与Master URL联系以获取ConfigMaps。

noproxy设置无法识别通配符char"*"(必须是v4 ipaddress(，但我必须将spring.cloud.kubernetes.client.masterurl设置为kubernetes.default.svc，以便可以通过DNS名称解决。

Answer 4

您是否可以尝试安装configmap，可能会有所帮助

volumeMounts:
- mountPath: /app/config
  name: example-configmap-overriding-new-01
volumes:
- name: example-configmap-overriding-new-01
  configMap:
      name: example-configmap-overriding-new-01

请让我知道它是否有效。谢谢

更正的语法错误