Java.lang.IllegalStateException: не удалось найти PropertySource, и свойство fail fast установлено, ошибка в микросервисах

Я слежу за микросервисами по ссылке: https://github.com/sqshq/PiggyMetrics. Мне удалось просто успешно запустить службу «config», но когда я попытался запустить службу «реестра», я получил следующую ошибку.

Может ли кто-нибудь указать, в чем проблема? Я не вижу никаких правильных шагов по настройке или последовательностям запуска микросервисов.

2018-08-19 18:55:15.424  INFO 12700 --- [           main] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : http://config:8888
2018-08-19 18:55:17.805  INFO 12700 --- [           main] c.c.c.ConfigServicePropertySourceLocator : Connect Timeout Exception on Url - http://config:8888. Will be trying the next url if available
2018-08-19 18:55:17.826 ERROR 12700 --- [           main] o.s.boot.SpringApplication               : Application run failed

java.lang.IllegalStateException: Could not locate PropertySource and the fail fast property is set, failing
    at org.springframework.cloud.config.client.ConfigServicePropertySourceLocator.locate(ConfigServicePropertySourceLocator.java:136) ~[spring-cloud-config-client-2.0.0.RELEASE.jar:2.0.0.RELEASE]
    at org.springframework.cloud.bootstrap.config.PropertySourceBootstrapConfiguration.initialize(PropertySourceBootstrapConfiguration.java:94) ~[spring-cloud-context-2.0.0.RELEASE.jar:2.0.0.RELEASE]
    at org.springframework.boot.SpringApplication.applyInitializers(SpringApplication.java:633) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:373) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:325) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at com.piggymetrics.registry.RegistryApplication.main(RegistryApplication.java:12) [classes/:na]
Caused by: org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://config:8888/registry/default": config; nested exception is java.net.UnknownHostException: config
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:732) ~[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:680) ~[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:600) ~[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.cloud.config.client.ConfigServicePropertySourceLocator.getRemoteEnvironment(ConfigServicePropertySourceLocator.java:218) ~[spring-cloud-config-client-2.0.0.RELEASE.jar:2.0.0.RELEASE]
    at org.springframework.cloud.config.client.ConfigServicePropertySourceLocator.locate(ConfigServicePropertySourceLocator.java:96) ~[spring-cloud-config-client-2.0.0.RELEASE.jar:2.0.0.RELEASE]
    ... 7 common frames omitted
Caused by: java.net.UnknownHostException: config
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source) ~[na:1.8.0_151]
    at java.net.PlainSocketImpl.connect(Unknown Source) ~[na:1.8.0_151]
    at java.net.SocksSocketImpl.connect(Unknown Source) ~[na:1.8.0_151]
    at java.net.Socket.connect(Unknown Source) ~[na:1.8.0_151]
    at java.net.Socket.connect(Unknown Source) ~[na:1.8.0_151]
    at sun.net.NetworkClient.doConnect(Unknown Source) ~[na:1.8.0_151]
    at sun.net.www.http.HttpClient.openServer(Unknown Source) ~[na:1.8.0_151]
    at sun.net.www.http.HttpClient.openServer(Unknown Source) ~[na:1.8.0_151]
    at sun.net.www.http.HttpClient.<init>(Unknown Source) ~[na:1.8.0_151]
    at sun.net.www.http.HttpClient.New(Unknown Source) ~[na:1.8.0_151]
    at sun.net.www.http.HttpClient.New(Unknown Source) ~[na:1.8.0_151]
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source) ~[na:1.8.0_151]
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(Unknown Source) ~[na:1.8.0_151]
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source) ~[na:1.8.0_151]
    at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source) ~[na:1.8.0_151]
    at org.springframework.http.client.SimpleBufferingClientHttpRequest.executeInternal(SimpleBufferingClientHttpRequest.java:76) ~[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48) ~[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53) ~[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:723) ~[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    ... 11 common frames omitted