我正在开发一个Spring Cloud Eureka微服务应用程序。我希望我的服务通过 Eureka 优先方法连接到配置服务。微服务打包为 docker 容器，并通过 docker-compose 进行部署。该应用程序由以下部分组成：
-
myapp-service-registry：使用Spring Cloud Eureka实现的服务注册服务 -
myapp-config-service：Spring Cloud 配置服务服务器 -
myapp-service-test：一个示例微服务，它应该尝试通过 Eureka 优先方法连接到配置服务，从而从配置服务中获取其配置数据。
与配置服务的连接失败，如下所述。首先是一些配置数据：
以下是myapp-service-registry application.yml：
server:
port: ${PORT:8761}
eureka:
client:
registerWithEureka: false
fetchRegistry: false
server:
waitTimeInMsWhenSyncEmpty: 0
这里是myapp-config-service application.yml：
server:
port: ${MYAPP_CONFIG_SERVICE_PORT:8888}
spring:
cloud:
config:
server:
git:
uri: ${MYAPP_CONFIG_SERVICE_GIT_URI}
config:
name: myapp-config-service
# eureka service registry client
eureka:
client:
serviceUrl:
defaultZone: http://${SERVICE_REGISTRY_HOST}:${SERVICE_REGISTRY_PORT}/eureka/
instance:
preferIpAddress: true
配置服务器和客户端初始化为 configserver-eureka 和 eureka-first https://github.com/spring-cloud-samples/tests 中的示例：
myapp-config-service bootstrap.yml是：
spring:
application:
name: myapp-config-service
cloud:
config:
discovery:
enabled: true
而myapp-service-test application.yml：
eureka:
client:
serviceUrl:
defaultZone: http://${SERVICE_REGISTRY_HOST}:${SERVICE_REGISTRY_PORT}/eureka/
instance:
preferIpAddress: true
而myapp-service-test bootstrap.yml：
spring:
application:
name: myapp-service-test
cloud:
config:
discovery:
enabled: true
serviceId: myapp-config-service
以下是docker-compose.yml(env 变量在启动时替换为实际值(：
myapp-service-registry:
image: myapp/myapp-service-registry:0.0.1
ports:
- ${EUREKA_PORT}:${EUREKA_PORT}
# myapp-config-service
myapp-config-service:
image: myapp/myapp-config-service:0.0.1
volumes:
- ${MYAPP_DATA_FOLDER}/config:/var/opt/myapp/config
environment:
MYAPP_CONFIG_SERVICE_PORT: ${MYAPP_CONFIG_SERVICE_PORT}
SERVICE_REGISTRY_HOST: ${MYAPP_STAGING_IP}
SERVICE_REGISTRY_PORT: ${EUREKA_PORT}
MYAPP_CONFIG_SERVICE_GIT_URI: ${MYAPP_CONFIG_SERVICE_GIT_URI}
ports:
- ${MYAPP_CONFIG_SERVICE_PORT}:${MYAPP_CONFIG_SERVICE_PORT}
# myapp-service-test
myapp-service-test:
image: myapp/myapp-service-test:0.0.1
environment:
SERVICE_REGISTRY_HOST: ${MYAPP_STAGING_IP}
SERVICE_REGISTRY_PORT: ${EUREKA_PORT}
ports:
- ${MYAPP_SERVICE_TEST_TWO_PORT}:8080
我可以通过将浏览器连接到 http://[...机器-IP...]：8761/并看到尤里卡仪表板。同样，我测试配置服务是否正常工作并响应 http:///[...机器-IP...]：8888/myapp-config-service;另一方面，使用上述配置，myapp-service-test 在启动时崩溃，并显示以下日志：
-02-03 08:26:45.191 INFO 1 --- [ main] e.f.s.two.TestServiceApplication : Starting TestServiceApplication v0.0.1 on b1bc37422027 with PID 1 (/app.jar started by root in /)
2016-02-03 08:26:45.223 INFO 1 --- [ main] e.f.s.two.TestServiceApplication : No active profile set, falling back to default profiles: default
2016-02-03 08:26:45.448 INFO 1 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@4d97e82d: startup date [Wed Feb 03 08:26:45 UTC 2016]; root of context hierarchy
2016-02-03 08:26:46.382 INFO 1 --- [ main] f.a.AutowiredAnnotationBeanPostProcessor : JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
2016-02-03 08:26:46.442 INFO 1 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'configurationPropertiesRebinderAutoConfiguration' of type [class org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$6b65138e] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2016-02-03 08:26:47.089 INFO 1 --- [ main] o.s.c.n.eureka.InstanceInfoFactory : Setting initial instance status as: STARTING
2016-02-03 08:26:48.231 INFO 1 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using encoding codec LegacyJacksonJson
2016-02-03 08:26:48.237 INFO 1 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using decoding codec LegacyJacksonJson
2016-02-03 08:26:49.171 INFO 1 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using encoding codec LegacyJacksonJson
2016-02-03 08:26:49.171 INFO 1 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using decoding codec LegacyJacksonJson
2016-02-03 08:26:49.496 INFO 1 --- [ main] com.netflix.discovery.DiscoveryClient : Disable delta property : false
2016-02-03 08:26:49.497 INFO 1 --- [ main] com.netflix.discovery.DiscoveryClient : Single vip registry refresh property : null
2016-02-03 08:26:49.497 INFO 1 --- [ main] com.netflix.discovery.DiscoveryClient : Force full registry fetch : false
2016-02-03 08:26:49.498 INFO 1 --- [ main] com.netflix.discovery.DiscoveryClient : Application is null : false
2016-02-03 08:26:49.502 INFO 1 --- [ main] com.netflix.discovery.DiscoveryClient : Registered Applications size is zero : true
2016-02-03 08:26:49.503 INFO 1 --- [ main] com.netflix.discovery.DiscoveryClient : Application version is -1: true
2016-02-03 08:26:49.503 INFO 1 --- [ main] com.netflix.discovery.DiscoveryClient : Getting all instance registry info from the eureka server
2016-02-03 08:26:49.720 WARN 1 --- [ main] com.netflix.discovery.DiscoveryClient : Can't get a response from http://localhost:8761/eureka/apps/
<...>
com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused
at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.jar!/:1.19]
at com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEncodingFilter.java:123) ~[jersey-client-1.19.jar!/:1.19]
at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.3.4.jar!/:1.3.4]
<...>
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_66-internal]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_66-internal]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_66-internal]
<...>
2016-02-03 08:26:49.747 ERROR 1 --- [ main] com.netflix.discovery.DiscoveryClient : Can't contact any eureka nodes - possibly a security group issue?
com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused
<...>
2016-02-03 08:26:49.770 ERROR 1 --- [ main] com.netflix.discovery.DiscoveryClient : DiscoveryClient_MYAPP-SERVICE-TEST/b1bc37422027:myapp-service-test - was unable to refresh its cache! status = java.net.ConnectException: Connection refused
com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused
<...>
2016-02-03 08:26:49.785 WARN 1 --- [ main] com.netflix.discovery.DiscoveryClient : Using default backup registry implementation which does not do anything.
2016-02-03 08:26:49.810 INFO 1 --- [ main] com.netflix.discovery.DiscoveryClient : Starting heartbeat executor: renew interval is: 10
2016-02-03 08:26:49.818 INFO 1 --- [ main] c.n.discovery.InstanceInfoReplicator : InstanceInfoReplicator onDemand update allowed rate per min is 4
2016-02-03 08:26:50.443 WARN 1 --- [ main] lientConfigServiceBootstrapConfiguration : Could not locate configserver via discovery
java.lang.RuntimeException: No matches for the virtual host name :myapp-config-service
at com.netflix.discovery.DiscoveryClient.getNextServerFromEureka(DiscoveryClient.java:782) ~[eureka-client-1.3.4.jar!/:1.3.4]
at org.springframework.cloud.netflix.config.DiscoveryClientConfigServiceBootstrapConfiguration.refresh(DiscoveryClientConfigServiceBootstrapConfiguration.java:71) [spring-cloud-netflix-core-1.1.0.M3.jar!/:1.1.0.M3]
<...>
2016-02-03 08:26:50.470 INFO 1 --- [ main] e.f.s.two.TestServiceApplication : Started TestServiceApplication in 7.101 seconds (JVM running for 9.329)
. ____ _ __ _ _
/\ / ___'_ __ _ _(_)_ __ __ _
( ( )___ | '_ | '_| | '_ / _` |
\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |___, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.3.1.RELEASE)
2016-02-03 08:26:50.773 INFO 1 --- [ main] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at: http://localhost:8888
2016-02-03 08:26:51.015 WARN 1 --- [ main] c.c.c.ConfigServicePropertySourceLocator : Could not locate PropertySource: I/O error on GET request for "http://localhost:8888/myapp-service-test/default":Connection refused; nested exception is java.net.ConnectException: Connection refused
<...>
2016-02-03 08:26:54.856 ERROR 1 --- [pool-5-thread-1] com.netflix.discovery.DiscoveryClient : Can't contact any eureka nodes - possibly a security group issue?
com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused
<...>
2016-02-03 08:26:57.272 WARN 1 --- [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testTwoServiceController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: java.lang.String myapp.services.two.TestServiceController.message; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'message' in string value "${message}"
2016-02-03 08:26:57.281 INFO 1 --- [ main] o.apache.catalina.core.StandardService : Stopping service Tomcat
2016-02-03 08:26:57.299 ERROR 1 --- [ main] o.s.boot.SpringApplication : Application startup failed
请注意，如果我没有实现 Eureka 优先方法(并直接在服务的bootstrap.yml中设置 spring.cloud.config.uri(，则服务将注册到 Eureka，找到配置服务器并正常工作(我可以在 Eureka 的仪表板中看到已注册的服务，并可以检查配置属性是否正确读取(。
你需要 bootstrap.yml 中的 eureka serviceUrl(以及配置服务器的服务 ID(。