我有这个演示项目，它打印从配置中读取的标签。
这是我的主要课程：
@SpringBootApplication
@EnableDiscoveryClient
@RestController
public class DemoApplication {
private MyConfig config;
private DiscoveryClient discoveryClient;
@Autowired
public DemoApplication(MyConfig config, DiscoveryClient discoveryClient) {
this.config = config;
this.discoveryClient = discoveryClient;
}
@RequestMapping("/")
public String info() {
return config.getMessage();
}
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
@RequestMapping("/services")
public String services() {
StringBuilder b = new StringBuilder();
discoveryClient.getServices().forEach((s) -> b.append(s).append(" , "));
return b.toString();
}
}
MyConfig课程是：
@Configuration
@ConfigurationProperties(prefix = "bean")
public class MyConfig {
private String message = "a message that can be changed live";
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
bootstrap.properties包含：
spring.application.name=demo
spring.cloud.kubernetes.config.name=demo
spring.cloud.kubernetes.config.enabled=true
spring.cloud.kubernetes.config.namespace=default
spring.cloud.kubernetes.reload.enabled=true
spring.cloud.kubernetes.reload.monitoring-config-maps=true
spring.cloud.kubernetes.reload.strategy=refresh
spring.cloud.kubernetes.reload.mode=event
management.endpoint.refresh.enabled=true
management.endpoints.web.exposure.include=*
以及中的依赖项build.gradle：
dependencies {
compile("org.springframework.boot:spring-boot-starter-web")
compile("org.springframework.boot:spring-boot-starter-actuator")
compile("org.springframework.cloud:spring-cloud-starter-kubernetes:+")
compile("org.springframework.cloud:spring-cloud-starter-kubernetes-config:+")
testCompile('org.springframework.boot:spring-boot-starter-test')
runtime("org.springframework.boot:spring-boot-properties-migrator")
}
我kubectl create -f configmap-demo.yml正在使用内容创建 ConfigMap：
apiVersion: v1
kind: ConfigMap
metadata:
name: demo
data:
bean.message: This is an info from k8
在 Kubernetes 中部署时，我在 Spring Boot 启动时收到以下错误：
2019-01-02 13:41:41.462 INFO 1 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'configurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$e13002af] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.1.RELEASE)
2019-01-02 13:41:41.940 INFO 1 --- [ main] b.c.PropertySourceBootstrapConfiguration : Located property source: ConfigMapPropertySource {name='configmap.demo.default'}
2019-01-02 13:41:41.942 INFO 1 --- [ main] b.c.PropertySourceBootstrapConfiguration : Located property source: SecretsPropertySource {name='secrets.demo.default'}
2019-01-02 13:41:42.030 INFO 1 --- [ main] com.example.demo.DemoApplication : The following profiles are active: kubernetes
2019-01-02 13:41:43.391 INFO 1 --- [ main] o.s.cloud.context.scope.GenericScope : BeanFactory id=416ee750-8ebb-365d-9114-12b51acaa1e0
2019-01-02 13:41:43.490 INFO 1 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$e13002af] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2019-01-02 13:41:43.917 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2019-01-02 13:41:43.952 INFO 1 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2019-01-02 13:41:43.953 INFO 1 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/9.0.13
2019-01-02 13:41:43.969 INFO 1 --- [ main] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [/usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/server:/usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64:/usr/lib/jvm/java-1.8-openjdk/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib]
2019-01-02 13:41:44.156 INFO 1 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2019-01-02 13:41:44.157 INFO 1 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2033 ms
2019-01-02 13:41:44.957 INFO 1 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2019-01-02 13:41:45.353 WARN 1 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'propertyChangeWatcher' defined in class path resource [org/springframework/cloud/kubernetes/config/reload/ConfigReloadAutoConfiguration$ConfigReloadAutoConfigurationBeans.class]: Unsatisfied dependency expressed through method 'propertyChangeWatcher' parameter 1; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'configurationUpdateStrategy' defined in class path resource [org/springframework/cloud/kubernetes/config/reload/ConfigReloadAutoConfiguration$ConfigReloadAutoConfigurationBeans.class]: Unsatisfied dependency expressed through method 'configurationUpdateStrategy' parameter 2; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.cloud.context.restart.RestartEndpoint' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
2019-01-02 13:41:45.358 INFO 1 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
2019-01-02 13:41:45.370 INFO 1 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2019-01-02 13:41:45.398 INFO 1 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-01-02 13:41:45.612 ERROR 1 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Parameter 2 of method configurationUpdateStrategy in org.springframework.cloud.kubernetes.config.reload.ConfigReloadAutoConfiguration$ConfigReloadAutoConfigurationBeans required a bean of type 'org.springframework.cloud.context.restart.RestartEndpoint' that could not be found.
The following candidates were found but could not be injected:
- Bean method 'restartEndpoint' in 'RestartEndpointWithIntegrationConfiguration' not loaded because @ConditionalOnClass did not find required class 'org.springframework.integration.monitor.IntegrationMBeanExporter'
- Bean method 'restartEndpointWithoutIntegration' in 'RestartEndpointWithoutIntegrationConfiguration' not loaded because @ConditionalOnEnabledEndpoint no property management.endpoint.restart.enabled found so using endpoint default
Action:
Consider revisiting the entries above or defining a bean of type 'org.springframework.cloud.context.restart.RestartEndpoint' in your configuration.
如果我设置spring.cloud.kubernetes.reload.enabled为false一切正常并且 configmap 被读取并投入使用。现在我的目标是在 configmap 更改但得到上面看到的异常时重新加载配置。我可以手动调用/actuator/refresh，所以我不认为刷新端点缺乏可用性。
我创建了一个演示项目，所有内容都包含在https://drive.google.com/open?id=1QbP8vePALLZ2hWQJArnyxrzSySuXHKiz中。