Cloud Foundry Service Registry (Eureka) 失败蓝绿部署和路由路径

Question

在启用 Spring Cloud Services 的情况下，我面临两个与将微服务部署到 Cloud Foundry 相关的问题。 首先，如果我使用 CF 路由路径部署应用程序，似乎将无法注册。我部署这样的应用程序：

cf push -p target/date-services-1.0.jar --hostname env5-date-services --route-path /v1 -f manifest.yml date-services-v1 清单如下所示：

applications:
- name: date-services-v1
  memory: 1024M
  instances: 1
  timeout: 180
  env:
    JBP_CONFIG_OPEN_JDK_MEMORY_CALCULATOR: "[memory_sizes: {metaspace: 180m}, memory_heuristics: {metaspace:  25}]"
  services:
  - rabbitmq
  - config-server
  - discovery
  - circuit-breaker
  - mysql

应用程序已被 Eureka 注册，但找不到。如果我从 Eureka 仪表板打开链接，它会被翻译为：

http://example.com/v1:80/info
http://example.com/v1:80/date

这个网址根本无法访问。其他应用程序尝试调用 date-services 微服务并失败并显示“404 not found”。如果我从部署中删除路由路径，一切都很好。

另一个问题是蓝绿部署。

如果我将同一个 jar 部署到一个新的应用名称，例如 date-services-GREEN，那么我在 Eureka 中再次失败：

Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT 2017-03-23 07:21:16.225 ERROR [date-services-sa-v1,,,] 20 --- [tbeatExecutor-0] com.netflix.discovery.DiscoveryClient : DiscoveryClient_date-services-SA-V1/pcfdev01-date-services-sa-v1-GREEN.apps.cf.example.com:84e48618-3b11-46e4-7b3e-f638788786ea - was unable to send heartbeat!
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at com.netflix.discovery.DiscoveryClient.register(DiscoveryClient.java:815)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT 2017-03-23 07:21:16.225 WARN [date-services-sa-v1,,,] 20 --- [tbeatExecutor-0] com.netflix.discovery.DiscoveryClient : DiscoveryClient_date-services-SA-V1/pcfdev01-date-services-sa-v1-GREEN.apps.cf.example.com:84e48618-3b11-46e4-7b3e-f638788786ea - registration failed Cannot execute request on any known server
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:111)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at com.netflix.discovery.DiscoveryClient.renew(DiscoveryClient.java:837)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at com.netflix.discovery.DiscoveryClient$HeartbeatThread.run(DiscoveryClient.java:1396)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at java.util.concurrent.FutureTask.run(FutureTask.java:266)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at java.lang.Thread.run(Thread.java:745)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:111)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at java.util.concurrent.FutureTask.run(FutureTask.java:266)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at com.netflix.discovery.DiscoveryClient.register(DiscoveryClient.java:815)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at com.netflix.discovery.DiscoveryClient.renew(DiscoveryClient.java:837)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at com.netflix.discovery.DiscoveryClient$HeartbeatThread.run(DiscoveryClient.java:1396)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT at java.lang.Thread.run(Thread.java:745)
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT 2017-03-23 07:21:16.306 INFO [date-services-sa-v1,,,] 20 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient : DiscoveryClient_date-services-SA-V1/pcfdev01-date-services-sa-v1-GREEN.apps.cf.example.com:84e48618-3b11-46e4-7b3e-f638788786ea: registering service...
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
Thu Mar 23 2017 09:21:16 GMT+0200 (IST) [APP] OUT 2017-03-23 07:21:16.331 WARN [date-services-sa-v1,,,] 20 --- [nfoReplicator-0] c.n.d.s.t.d.RetryableEurekaHttpClient : Request execution failure with status code 403; retrying on another server if available

最终这些错误消失了，但是在完全蓝绿色之后，Eureka 中的注册路线仍然指向 GREEN 而不是原始路线。这当然是无法访问的。

这是我正在运行的命令：

cf push -p artifact.jar --hostname ${ENV_NAME}-${HOST_NAME}-${VERSION_NUMBER}-GREEN  -f manifest.yml ${TARGET_JOB_NAME}-GREEN

cf map-route ${TARGET_JOB_NAME}-GREEN ${DOMAIN} --hostname ${ENV_NAME}-${HOST_NAME}-${VERSION_NUMBER}

cf delete-route ${DOMAIN} -f --hostname ${ENV_NAME}-${HOST_NAME}-${VERSION_NUMBER}-GREEN

cf rename ${TARGET_JOB_NAME}-GREEN ${TARGET_JOB_NAME}

在 Eureka 中注册的最终 URL 是：

http://pcfdev01-date-services-sa-v1-green.cf.example.com/info

在 URL 中使用“绿色”，它根本不起作用。如果我从 URL 中删除“绿色”，它就可以工作。

我试过 Camden.SR6 和 Brixton SR7。 Spring Cloud Services 是 1.4.1.RELEASE。我相信 CF 环境下的运行时是 1.7。

谢谢。

Answer 1

您的环境中安装了哪个版本的 Spring Cloud Services 磁贴？要在同一空间中蓝绿部署应用程序，您必须使用 1.2 或更高版本，请参阅http://docs.pivotal.io/spring-cloud-services/1-2/security-overview.html#service-registry-virtual-hostname-ownership。该部分讨论了跨 PCF 安装的应用程序，但在 PCF 中，您可以让多个应用程序注册为相同的 Eureka 应用程序名/虚拟主机名，前提是它们都在同一个空间中。

关于基于路径的路由的第一个问题，它与 Eureka 开箱即用不兼容。该应用程序将使用主机名+路径（取自 vcap.application.uris）进行注册，该值将进入注册表中的主机名字段。功能区不希望这样：https://github.com/Netflix/ribbon/blob/v2.2.2/ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer/LoadBalancerContext.java#L572 您可以尝试在此处覆盖该行为：https://github.com/spring-cloud/spring-cloud-netflix/blob/v1.3.0.RC1/spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/ribbon/RibbonLoadBalancerContext.java

另一种方法可能是使用 Zuul 将 /v1 和 /v2 映射到正确的 Eureka 应用程序，并使用不同的名称注册这些 /v1 和 /v2 应用程序。