部署到 Elastic Beanstalk 显示 502 错误答案

【问题标题】：Deploy to Elastic Beanstalk showed 502 error部署到 Elastic Beanstalk 显示 502 错误
【发布时间】：2021-03-17 03:34:17
【问题描述】：

我曾多次尝试将 Pug 和 NodeJS 应用程序部署到 Elastic Beanstalk，但均未成功。每次，我都会收到 502 错误。在检查错误日志时，我看到 error.log 显示 EBS 可能正在使用与应用程序不同的端口，但我可以确认两者都使用端口 8081。

我查找了其他类似的问题，但这些答案无法解决此问题。

这可能是什么问题？

谢谢。

-------------------------------------
/var/log/nginx/error.log
-------------------------------------
2020/12/05 06:20:56 [error] 3735#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.42.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"
2020/12/05 06:21:11 [error] 3735#0: *3 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.42.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"
2020/12/05 06:21:26 [error] 3735#0: *5 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.42.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"
2020/12/05 06:21:41 [error] 3735#0: *7 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.42.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"
2020/12/05 06:21:49 [error] 3735#0: *9 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.84.55, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"
2020/12/05 06:21:56 [error] 3735#0: *11 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.42.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"
2020/12/05 06:22:04 [error] 3735#0: *13 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.84.55, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"
2020/12/05 06:22:11 [error] 3735#0: *15 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.42.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"
2020/12/05 06:22:19 [error] 3735#0: *17 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.84.55, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"
2020/12/05 06:22:26 [error] 3735#0: *19 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.42.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"
2020/12/05 06:22:34 [error] 3735#0: *21 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.84.55, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"
2020/12/05 06:22:41 [error] 3735#0: *23 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.42.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"
2020/12/05 06:22:49 [error] 3735#0: *25 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.84.55, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"
2020/12/05 06:22:56 [error] 3735#0: *27 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.42.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"
2020/12/05 06:23:03 [error] 3735#0: *29 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.42.155, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "app17-env.eba-wxcw2xyp.us-east-1.elasticbeanstalk.com"
2020/12/05 06:23:03 [error] 3735#0: *29 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.42.155, server: , request: "GET /robots.txt HTTP/1.1", upstream: "http://127.0.0.1:8081/robots.txt", host: "app17-env.eba-wxcw2xyp.us-east-1.elasticbeanstalk.com"
2020/12/05 06:23:04 [error] 3735#0: *29 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.42.155, server: , request: "GET /favicon.ico HTTP/1.1", upstream: "http://127.0.0.1:8081/favicon.ico", host: "app17-env.eba-wxcw2xyp.us-east-1.elasticbeanstalk.com", referrer: "http://app17-env.eba-wxcw2xyp.us-east-1.elasticbeanstalk.com/"
2020/12/05 06:23:04 [error] 3735#0: *33 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.84.55, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "172.31.84.136"

-------------------------------------
/var/log/eb-activity.log
-------------------------------------
[2020-12-05T06:20:48.267Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/01stop_xray.sh] : Completed activity. Result:
  Executing: if ( initctl status xray | grep start ); then initctl stop xray; fi
  xray start/running, process 2250
  xray stop/waiting
[2020-12-05T06:20:48.267Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/02start_xray.sh] : Starting activity...
[2020-12-05T06:20:48.378Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/02start_xray.sh] : Completed activity.
[2020-12-05T06:20:48.378Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/10stop.sh] : Starting activity...
[2020-12-05T06:20:49.867Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/10stop.sh] : Completed activity. Result:
  + /opt/elasticbeanstalk/containerfiles/ebnode.py --action stop-all
  status: Unknown job: nodejs
  status: Unknown job: nodejs
  status: Unknown job: nginx
  status: Unknown job: nginx
  status: Unknown job: httpd
  status: Unknown job: httpd
  Did not find to find status of init job. Assuming stopped.
  Did not find to find status of init job. Assuming stopped.
  Did not find to find status of init job. Assuming stopped.
  Did not find to find status of init job. Assuming stopped.
  Did not find to find status of init job. Assuming stopped.
  Did not find to find status of init job. Assuming stopped.
[2020-12-05T06:20:49.867Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/20clean.sh] : Starting activity...
[2020-12-05T06:20:49.966Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/20clean.sh] : Completed activity. Result:
  ++ /opt/elasticbeanstalk/bin/get-config container -k app_base_dir
  + EB_APP_BASE_DIR=/var/app
  + rm -rf /var/app
[2020-12-05T06:20:49.966Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/30app_deploy.sh] : Starting activity...
[2020-12-05T06:20:50.410Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/30app_deploy.sh] : Completed activity. Result:
  ++ /opt/elasticbeanstalk/bin/get-config container -k app_base_dir
  + EB_APP_BASE_DIR=/var/app
  ++ /opt/elasticbeanstalk/bin/get-config container -k app_staging_dir
  + EB_APP_STAGING_DIR=/tmp/deployment/application
  ++ /opt/elasticbeanstalk/bin/get-config container -k app_deploy_dir
  + EB_APP_DEPLOY_DIR=/var/app/current
  ++ /opt/elasticbeanstalk/bin/get-config container -k app_user
  + EB_APP_USER=nodejs
  + mkdir /var/app
  + mv /tmp/deployment/application /var/app/current
  + chown -R nodejs:nodejs /var/app/current
[2020-12-05T06:20:50.410Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/40config_deploy.sh] : Starting activity...
[2020-12-05T06:20:50.524Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/40config_deploy.sh] : Completed activity. Result:
  ++ /opt/elasticbeanstalk/bin/get-config container -k config_staging_dir
  + EB_CONFIG_STAGING_DIR=/tmp/deployment/config
  ++ ls /tmp/deployment/config
  + for i in '$(ls $EB_CONFIG_STAGING_DIR)'
  ++ sed -e 's/#/\//g'
  ++ echo '#etc#init#nginx.conf'
  + FILE_NAME=/etc/init/nginx.conf
  + /bin/cp /tmp/deployment/config/#etc#init#nginx.conf /etc/init/nginx.conf
  + for i in '$(ls $EB_CONFIG_STAGING_DIR)'
  ++ sed -e 's/#/\//g'
  ++ echo '#etc#init#nodejs.conf'
  + FILE_NAME=/etc/init/nodejs.conf
  + /bin/cp /tmp/deployment/config/#etc#init#nodejs.conf /etc/init/nodejs.conf
  + for i in '$(ls $EB_CONFIG_STAGING_DIR)'
  ++ sed -e 's/#/\//g'
  ++ echo '#etc#nginx#conf.d#00_elastic_beanstalk_proxy.conf'
  + FILE_NAME=/etc/nginx/conf.d/00_elastic_beanstalk_proxy.conf
  + /bin/cp /tmp/deployment/config/#etc#nginx#conf.d#00_elastic_beanstalk_proxy.conf /etc/nginx/conf.d/00_elastic_beanstalk_proxy.conf
  + for i in '$(ls $EB_CONFIG_STAGING_DIR)'
  ++ sed -e 's/#/\//g'
  ++ echo '#etc#nginx#nginx.conf'
  + FILE_NAME=/etc/nginx/nginx.conf
  + /bin/cp /tmp/deployment/config/#etc#nginx#nginx.conf /etc/nginx/nginx.conf
[2020-12-05T06:20:50.524Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/50start.sh] : Starting activity...
[2020-12-05T06:20:52.017Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/50start.sh] : Completed activity. Result:
  + /opt/elasticbeanstalk/containerfiles/ebnode.py --action start-all
  nodejs start/running, process 3707
  nginx start/running, process 3715
[2020-12-05T06:20:52.017Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/60monitor_pids.sh] : Starting activity...
[2020-12-05T06:20:52.023Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/60monitor_pids.sh] : Completed activity. Result:
  + '[' -d /etc/healthd ']'
[2020-12-05T06:20:52.023Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/70restart_healthd.sh] : Starting activity...
[2020-12-05T06:20:52.025Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook/70restart_healthd.sh] : Completed activity. Result:
  + '[' -d /etc/healthd ']'
[2020-12-05T06:20:52.025Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployEnactHook] : Completed activity. Result:
  Successfully execute hooks in directory /opt/elasticbeanstalk/hooks/appdeploy/enact.
[2020-12-05T06:20:52.025Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployPostHook] : Starting activity...
[2020-12-05T06:20:52.025Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/AppDeployPostHook] : Completed activity. Result:
  Successfully execute hooks in directory /opt/elasticbeanstalk/hooks/appdeploy/post.
[2020-12-05T06:20:52.026Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/PostInitHook] : Starting activity...
[2020-12-05T06:20:52.026Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1/PostInitHook] : Completed activity. Result:
  Successfully execute hooks in directory /opt/elasticbeanstalk/hooks/postinit.
[2020-12-05T06:20:52.026Z] INFO  [3183]  - [Application deployment app17-source@1/StartupStage1] : Completed activity. Result:
  Application deployment - Command CMD-Startup stage 1 completed
[2020-12-05T06:20:52.026Z] INFO  [3183]  - [Application deployment app17-source@1/AddonsAfter] : Starting activity...
[2020-12-05T06:20:52.026Z] INFO  [3183]  - [Application deployment app17-source@1/AddonsAfter/ConfigLogRotation] : Starting activity...
[2020-12-05T06:20:52.026Z] INFO  [3183]  - [Application deployment app17-source@1/AddonsAfter/ConfigLogRotation/10-config.sh] : Starting activity...
[2020-12-05T06:20:52.223Z] INFO  [3183]  - [Application deployment app17-source@1/AddonsAfter/ConfigLogRotation/10-config.sh] : Completed activity. Result:
  Disabled forced hourly log rotation.
[2020-12-05T06:20:52.223Z] INFO  [3183]  - [Application deployment app17-source@1/AddonsAfter/ConfigLogRotation] : Completed activity. Result:
  Successfully execute hooks in directory /opt/elasticbeanstalk/addons/logpublish/hooks/config.
[2020-12-05T06:20:52.223Z] INFO  [3183]  - [Application deployment app17-source@1/AddonsAfter] : Completed activity.
[2020-12-05T06:20:52.224Z] INFO  [3183]  - [Application deployment app17-source@1] : Completed activity. Result:
  Application deployment - Command CMD-Startup succeeded
[2020-12-05T06:23:10.853Z] INFO  [4196]  - [CMD-TailLogs] : Starting activity...
[2020-12-05T06:23:10.853Z] INFO  [4196]  - [CMD-TailLogs/AddonsBefore] : Starting activity...
[2020-12-05T06:23:10.853Z] INFO  [4196]  - [CMD-TailLogs/AddonsBefore] : Completed activity.
[2020-12-05T06:23:10.853Z] INFO  [4196]  - [CMD-TailLogs/TailLogs] : Starting activity...
[2020-12-05T06:23:10.853Z] INFO  [4196]  - [CMD-TailLogs/TailLogs/TailLogs] : Starting activity...

【问题讨论】：

为什么端口8081？默认端口是 8080，不是吗？
@Marcin 我试过 8080 和 8081，都显示 502 错误。

标签： amazon-web-services amazon-elastic-beanstalk

【解决方案1】：

您需要在 BeanStalk 环境中为 PORT 添加配置。

转到配置。
转到安全。
在配置中添加 PORT 及其值。

它并没有在任何地方被提及，但要运行您的节点应用程序，您需要将 PORT 作为环境变量传递。

【讨论】：