我在 Minikube 中使用 Kubernetes。我可以将 Spring Boot 示例应用程序部署到 Kubernetes 中。
我正在探索 Kubernetes configMap。我可以使用 Spring Cloud 启动器成功运行 Spring Boot 应用程序并从配置映射中选择属性键。到这里我就成功了。
我目前面临的问题是 configmap 重新加载。
这是我的配置图：
配置映射.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: minikube-sample
namespace: default
data:
app.data.name: name
application.yml: |-
app:
data:
test: test
引导程序.yaml
management:
endpoint:
health:
enabled: true
info:
enabled: true
restart:
enabled: true
spring:
application:
name: minikube-sample
cloud:
kubernetes:
config:
enabled: true
name: ${spring.application.name}
namespace: default
reload:
enabled: true
家庭控制器：
package com.minikube.sample.rest.controller;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.minikube.sample.properties.PropertiesConfig;
import lombok.Getter;
import lombok.Setter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Lookup;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @author Gorantla, Eresh
* @created 06-12-2018
*/
@RestController
@RequestMapping("/home")
public class HomeResource {
@Autowired
PropertiesConfig config;
@GetMapping("/data")
public ResponseEntity<ResponseData> getData() {
ResponseData responseData = new ResponseData();
responseData.setId(1);
responseData.setName(config.getName());
responseData.setPlace("Hyderabad");
responseData.setValue(config.getTest());
return new ResponseEntity<>(responseData, HttpStatus.OK);
}
@Getter
@Setter
public class ResponseData {
private String name;
private Integer id;
private String place;
private String value;
}
}
部署.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: minikube-sample
namespace: default
spec:
selector:
matchLabels:
app: minikube-sample
replicas: 1
template:
metadata:
labels:
app: minikube-sample
spec:
containers:
- name: minikube-sample
image: minikube-sample:latest
imagePullPolicy: Never
ports:
- containerPort: 8080
env:
- name: env.namespace
value: default
volumeMounts:
- name: config
mountPath: /config
volumes:
- name: config
configMap:
name: minikube-sample
我使用 @ConfigurationProperties 重新加载属性。
依赖项
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-kubernetes</artifactId>
<version>1.1.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-kubernetes-config</artifactId>
<version>1.1.0.RELEASE</version>
</dependency>
我做了什么 ？ 我已经阅读了 Spring Cloud 文档。 “需要服务帐户的视图角色才能侦听配置映射更改。” 然后我通过以下命令创建了集群视图角色
C:\Users\eresh.gorantla\apps\minikube-sample\src\main\fabric8 (master -> origin)
λ kubectl create clusterrolebinding minikube-sample --clusterrole=view --serviceaccount=default:minikube --namespace=default
clusterrolebinding.rbac.authorization.k8s.io/minikube-sample created
但是当我在 kubernetes 中更新 configmap 时，属性不会即时重新加载。我怀疑集群角色绑定有问题。请提供您的想法。任何帮助表示赞赏。