The Sequence Problem of Programming spring-cloud Microservices with docker-compose

  docker, question

If the question is the same, usespring-cloudSeveral microservices have been built for testing use.docker-composeArrange, found a problem in the process of testing:

The microservice provider project uses the variables provided by the configuration center project and uses the@Value("${from}")Method injection, both services rely on discovery services (Eureka), then the micro-service provider cannot start correctly when the configuration center project is not started. At startup${from}Variables will prompt that they do not exist, resulting in errors. If it is started locally, the configuration center project can be started first. This problem can be avoided, but it is still in use.docker-composeHow to solve the problem of dependency when arranging, or can you specify one project to start and then start other projects?

docker-compose.yml

version: '2'
 services:
 discover1:
 image: zlikun/eureka:1.0.0
 container_name: discover1
 ports:
 - "8761:8761"
 environment:
 - spring.profiles.active=prod
 - eureka.client.service-url.defaultZone=http://discover2:8761/eureka/,http://discover3:8761/eureka/
 discover2:
 image: zlikun/eureka:1.0.0
 container_name: discover2
 ports:
 - "8762:8761"
 environment:
 - spring.profiles.active=prod
 - eureka.client.service-url.defaultZone=http://discover1:8761/eureka/,http://discover3:8761/eureka/
 discover3:
 image: zlikun/eureka:1.0.0
 container_name: discover3
 ports:
 - "8763:8761"
 environment:
 - spring.profiles.active=prod
 - eureka.client.service-url.defaultZone=http://discover1:8761/eureka/,http://discover2:8761/eureka/
 config1:
 image: zlikun/config:1.0.0
 container_name: config1
 ports:
 - "7001:7001"
 environment:
 - spring.profiles.active=prod
 - eureka.client.service-url.defaultZone=http://discover1:8761/eureka/,http://discover2:8761/eureka/,http://discover3:8761/eureka/
 config2:
 image: zlikun/config:1.0.0
 container_name: config2
 ports:
 - "7002:7001"
 environment:
 - spring.profiles.active=prod
 - eureka.client.service-url.defaultZone=http://discover1:8761/eureka/,http://discover2:8761/eureka/,http://discover3:8761/eureka/
 user1:
 image: zlikun/user:1.0.0
 container_name: user1
 ports:
 - "9001:9000"
 environment:
 - spring.profiles.active=prod
 - eureka.client.service-url.defaultZone=http://discover1:8761/eureka/,http://discover2:8761/eureka/,http://discover3:8761/eureka/
 user2:
 image: zlikun/user:1.0.0
 container_name: user2
 ports:
 - "9002:9000"
 environment:
 - spring.profiles.active=prod
 - eureka.client.service-url.defaultZone=http://discover1:8761/eureka/,http://discover2:8761/eureka/,http://discover3:8761/eureka/

Testing engineering

Error message

2017-08-16 15:47:28.474  WARN 12932 --- [           main] lientConfigServiceBootstrapConfiguration : Could not locate configserver via discovery
 
 java.lang.IllegalStateException: No instances found of configserver (config)
 at org.springframework.cloud.config.client.ConfigServerInstanceProvider.getConfigServerInstance(ConfigServerInstanceProvider.java:25) ~[spring-cloud-config-client-1.3.2.RELEASE.jar:1.3.2.RELEASE]
 at org.springframework.cloud.config.client.DiscoveryClientConfigServiceBootstrapConfiguration.refresh(DiscoveryClientConfigServiceBootstrapConfiguratio  n.java:80) [spring-cloud-config-client-1.3.2.RELEASE.jar:1.3.2.RELEASE]
 at org.springframework.cloud.config.client.DiscoveryClientConfigServiceBootstrapConfiguration.startup(DiscoveryClientConfigServiceBootstrapConfiguratio  n.java:66) [spring-cloud-config-client-1.3.2.RELEASE.jar:1.3.2.RELEASE]
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_102]
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_102]
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_102]
 at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_102]
 at org.springframework.context.event.ApplicationListenerMethodAdapter.doInvoke(ApplicationListenerMethodAdapter.java:256) [spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
 at org.springframework.context.event.ApplicationListenerMethodAdapter.processEvent(ApplicationListenerMethodAdapter.java:177) [spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
 at org.springframework.context.event.ApplicationListenerMethodAdapter.onApplicationEvent(ApplicationListenerMethodAdapter.java:140) [spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
 at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:167) [spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
 at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) [spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
 at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:393) [spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
 at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:399) [spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
 at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:347) [spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
 at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:883) [spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
 at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:144) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
 at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) [spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
 at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
 at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
 at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
 at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
 at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
 at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
 at com.zlikun.sc.UserApplication.main(UserApplication.java:12) [classes/:na]
 
 2017-08-16 15:47:28.513  INFO 12932 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 9000 (http)
 2017-08-16 15:47:28.513  INFO 12932 --- [           main] .s.c.n.e.s.EurekaAutoServiceRegistration : Updating port to 9000
 2017-08-16 15:47:28.517  INFO 12932 --- [           main] com.zlikun.sc.UserApplication            : Started UserApplication in 8.029 seconds (JVM running for 8.768)

The exception information here is the exception thrown when I started the micro-service provider when the configuration center was shut down during local debugging. I have two questions:

  1. How to Avoid Configuration Dependency (Fromspring-cloudStart on your own)
  2. How to deal withdocker-composeThe container startup sequence during layout (aboutdocker-composeI am a beginner, so I don’t know much about it yet.

Split docker-compose file

Separate the basic platforms such as the configuration center. After all, these may only be started once in the entire application cycle.

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