Enable graceful shutdown for apollo-adminservice

[Copilot]

apollo-adminservice currently terminates immediately on shutdown, interrupting in-flight requests and potentially causing clients to hit already-stopped instances due to Eureka registration lag.

Changes

• Configuration: Enabled Spring Boot's graceful shutdown in application.yml:

  server:
    shutdown: graceful
  spring:
    lifecycle:
      timeout-per-shutdown-phase: 30s

• Test: Added GracefulShutdownConfigurationTest to verify lifecycle processor is configured

• Documentation: Updated EN/CN deployment guides with graceful shutdown details and added CHANGES.md entry

Behavior

On SIGTERM, the service now:

1. Stops accepting new requests
2. Waits up to 30s for active requests to complete
3. Allows Eureka deregistration to propagate before final shutdown

Timeout is configurable via spring.lifecycle.timeout-per-shutdown-phase.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• central.sonatype.com
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --enable-native-access=ALL-UNNAMED -classpath /usr/share/apache-maven-3.9.12/boot/plexus-classworlds-2.9.0.jar -Dclassworlds.conf=/usr/share/apache-maven-3.9.12/bin/m2.conf -Dmaven.home=/usr/share/apache-maven-3.9.12 -Dlibrary.jansi.path=/usr/share/apache-maven-3.9.12/lib/jansi-native -Dmaven.multiModuleProjectDirectory=/home/REDACTED/work/apollo/apollo org.codehaus.plexus.classworlds.launcher.Launcher test -pl apollo-adminservice -Dtest=GracefulShutdownConfigurationTest -DfailIfNoTests=false (dns block)
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --enable-native-access=ALL-UNNAMED -classpath /usr/share/apache-maven-3.9.12/boot/plexus-classworlds-2.9.0.jar -Dclassworlds.conf=/usr/share/apache-maven-3.9.12/bin/m2.conf -Dmaven.home=/usr/share/apache-maven-3.9.12 -Dlibrary.jansi.path=/usr/share/apache-maven-3.9.12/lib/jansi-native -Dmaven.multiModuleProjectDirectory=/home/REDACTED/work/apollo/apollo org.codehaus.plexus.classworlds.launcher.Launcher clean install -DskipTests -T 1C (dns block)
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --enable-native-access=ALL-UNNAMED -classpath /usr/share/apache-maven-3.9.12/boot/plexus-classworlds-2.9.0.jar -Dclassworlds.conf=/usr/share/apache-maven-3.9.12/bin/m2.conf -Dmaven.home=/usr/share/apache-maven-3.9.12 -Dlibrary.jansi.path=/usr/share/apache-maven-3.9.12/lib/jansi-native -Dmaven.multiModuleProjectDirectory=/home/REDACTED/work/apollo/apollo org.codehaus.plexus.classworlds.launcher.Launcher clean package -DskipTests -pl apollo-adminservice -am -Dapollo_profile=github (dns block)
• www.puppycrawl.com
  • Triggering command: /opt/hostedtoolcache/CodeQL/2.23.9/x64/codeql/tools/linux64/java/bin/java /opt/hostedtoolcache/CodeQL/2.23.9/x64/codeql/tools/linux64/java/bin/java -jar /opt/hostedtoolcache/CodeQL/2.23.9/x64/codeql/xml/tools/xml-extractor.jar --fileList=/home/REDACTED/work/apollo/.codeql-scratch/dbs/java/working/files-to-index14398284797094138224.list --sourceArchiveDir=/home/REDACTED/work/apollo/.codeql-scratch/dbs/java/src --outputDir=/home/REDACTED/work/apollo/.codeql-scratch/dbs/java/trap/java (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

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This section details on the original issue you should resolve

<issue_title>目前 apollo-adminservice 缺乏优雅下线机制，服务停止时可能中断正在处理的请求，造成请求失败。</issue_title>
<issue_description>目前 apollo-adminservice 未实现优雅下线特性，当服务节点被终止时，存在以下问题：正在处理中的请求会被强制中断，同时 Eureka 注册信息未能及时清除，可能导致其他服务继续向已下线节点发送请求，造成请求损失。</issue_description>

<agent_instructions>1. learn how to enable graceful shutdown in spring boot
2. see how to enable this feature in apollo and configure it in a reasonable way
3. add necessary tests to verify this feature is working as expected</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes 目前 apollo-adminservice 缺乏优雅下线机制，服务停止时可能中断正在处理的请求，造成请求失败。 #5533

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