Question

我正在尝试使用AWS CodePipeline将Node.js应用程序部署到AWS ElasticBeanstalk。由于我的应用程序正在使用WebSockets，因此我在.ebextensions中包含了以下配置文件。

container_commands:
  enable_websocket:
    command: 
      sed -i '/\s*proxy_set_header\s*Connection/c \
              proxy_set_header Upgrade $http_upgrade;\
              proxy_set_header Connection "upgrade";\
          ' /tmp/deployment/config/#etc#nginx#conf.d#00_elastic_beanstalk_proxy.conf

但是，CodePipeline在部署过程中失败，并且ElasticBeanstalk日志文件cfn-init.log如下所示：

2020-06-18 12:43:42,345 [INFO] -----------------------Starting build-----------------------
2020-06-18 12:43:42,352 [INFO] Running configSets: Infra-EmbeddedPostBuild
2020-06-18 12:43:42,355 [INFO] Running configSet Infra-EmbeddedPostBuild
2020-06-18 12:43:42,359 [INFO] Running config postbuild_0_drcha
2020-06-18 12:43:42,381 [ERROR] Command enable_websockets (sed -i '/\s*proxy_set_header\s*Connection/c \
        proxy_set_header Upgrade $http_upgrade;\
        proxy_set_header Connection "upgrade";\
        ' /tmp/deployment/config/#etc#nginx#conf.d#00_elastic_beanstalk_proxy.conf) failed
2020-06-18 12:43:42,381 [ERROR] Error encountered during build of postbuild_0_drcha: Command enable_websockets failed
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/construction.py", line 542, in run_config
    CloudFormationCarpenter(config, self._auth_config).build(worklog)
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/construction.py", line 260, in build
    changes['commands'] = CommandTool().apply(self._config.commands)
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/command_tool.py", line 117, in apply
    raise ToolError(u"Command %s failed" % name)
ToolError: Command enable_websockets failed
2020-06-18 12:43:42,383 [ERROR] -----------------------BUILD FAILED!------------------------
2020-06-18 12:43:42,383 [ERROR] Unhandled exception during build: Command enable_websockets failed
Traceback (most recent call last):
  File "/opt/aws/bin/cfn-init", line 171, in <module>
    worklog.build(metadata, configSets)
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/construction.py", line 129, in build
    Contractor(metadata).build(configSets, self)
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/construction.py", line 530, in build
    self.run_config(config, worklog)
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/construction.py", line 542, in run_config
    CloudFormationCarpenter(config, self._auth_config).build(worklog)
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/construction.py", line 260, in build
    changes['commands'] = CommandTool().apply(self._config.commands)
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/command_tool.py", line 117, in apply
    raise ToolError(u"Command %s failed" % name)
ToolError: Command enable_websockets failed

失败的原因是什么？

Answer 1

我不确定为什么会发生错误，但是如果您使用的是Amazon Linux 2平台（于2020年4月30日针对Node.js推出），则可以更轻松地自定义nginx配置。

如Extending Elastic Beanstalk Linux platforms中所述，您可以将自定义nginx文件放在.platform/nginx/nginx.conf上，部署将自动使用它。您可能需要检查默认配置并以此为基础。

Answer 2

我遇到了完全相同的问题，遇到了同样无法使用的配置。经过进一步的侦查，我发现了正确的配置（至少到目前为止）。

files:
  "/etc/nginx/conf.d/websockets.conf":
    content: |

      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "upgrade";

我发布了a blog article，如果您需要其他配置方面的帮助，可能会有所帮助。

Answer 3

这里的秘密是来自 container_commands 的完整日志和回溯位于 /var/log/cfn-init-cmd.log（在 2020 年 11 月发布的 Amazon Linux 2 Elastic Beanstalk 上）。要阅读此内容，您可以运行：

eb ssh [environment-name]
sudo tail -n 50 -f /var/log/cfn-init-cmd.log

这似乎没有任何明显的记录，并且在您运行 eb logs 时也不会显示。我是在 /var/log 四处寻找才找到的。

对于希望运行 Django 管理命令的读者，请参阅 Running Django migrations when deploying to Elastic Beanstalk

.ebextensions中的命令在ElasticBeanstalk上失败

3 个答案: