Springboot整合Spring Cloud Kubernetes读取ConfigMap支持自动刷新配置的教程

<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
 <groupId>org.springframework.cloud</groupId>
 <artifactId>spring-cloud-starter-kubernetes-config</artifactId>
</dependency>

@SpringBootApplication
public class ConfigMapMain {
  public static void main(String[] args) {
    SpringApplication.run(ConfigMapMain.class, args);
  }
}

@RestController
public class PkslowController {
  @Value("${pkslow.age:0}")
  private Integer age;

  @Value("${pkslow.email:null}")
  private String email;

  @Value("${pkslow.webSite:null}")
  private String webSite;

  @Value("${pkslow.password:null}")
  private String password;

  @GetMapping("/pkslow")
  public Map<String, String> getConfig() {
    Map<String, String> map = new HashMap<>();
    map.put("age", age.toString());
    map.put("email", email);
    map.put("webSite", webSite);
    map.put("password", password);
    return map;
  }
}

server:
 port: 8080
spring:
 application:
  name: spring-cloud-kubernetes-configmap
 cloud:
  kubernetes:
   config:
    name: spring-cloud-kubernetes-configmap

$ echo -n "pkslow-pass" | base64 
cGtzbG93LXBhc3M=

kind: Secret
apiVersion: v1
metadata:
 name: spring-cloud-kubernetes-secret
 namespace: default
data:
 pkslow.password: cGtzbG93LXBhc3M=
type: Opaque

kind: ConfigMap
apiVersion: v1
metadata:
 name: spring-cloud-kubernetes-configmap
 namespace: default
 labels:
  app: scdf-server
data:
 application.yaml: |-
  pkslow:
   age: 19
   email: admin@pkslow.com
   webSite: www.pkslow.com

env:
	- name: PKSLOW_PASSWORD
		valueFrom:
			secretKeyRef:
				name: spring-cloud-kubernetes-secret
				key: pkslow.password

server:
 port: 8080
spring:
 application:
  name: spring-cloud-kubernetes-configmap
 cloud:
  kubernetes:
   config:
    name: spring-cloud-kubernetes-configmap
    namespace: default
   secrets:
    name: spring-cloud-kubernetes-secret
    namespace: default
    enabled: true
   reload:
    enabled: true
    monitoring-config-maps: true
    monitoring-secrets: true
    strategy: restart_context
    mode: event
management:
 endpoint:
  restart:
   enabled: true
 endpoints:
  web:
   exposure:
    include: restart

<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-actuator</artifactId>
</dependency>
<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-actuator-autoconfigure</artifactId>
</dependency>

$ kubectl apply -f src/main/k8s/config.yaml 
configmap/spring-cloud-kubernetes-configmap configured