ruby-on-rails – 如何在Amazon Elastic Beanstalk上部署rails项

They run after the application and web server have been set up and the application version file has been extracted,but before the application version is deployed.

(强调我的)

这意味着在那个/ var / app / current你正在设置为您的命令的cwd仍然指向以前的版本.但是默认情况下,从文档再次,cwd：

is the directory of the unzipped application.

这意味着如果要从刚刚解压缩的应用程序的目录(但尚未部署)运行delayed_job,请不要重写cwd,并且应该为要部署的应用程序启动delayed_job.

参考：http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/customize-containers-ec2.html#customize-containers-format-container_commands

更新：

我现在已经设置好了,发现通过标准的container_commands来做到这一点有限制 – 基本上,delayed_job将在/ var / app / ondeck目录中启动.通常这是可以的,但我有一些问题的一些工作,因为这个路径被困在它会导致错误,因为应用程序现在在/ var / app / current.

我发现一个未记录的(如此警告！)方法,您可以在应用服务器重新启动后添加要运行的脚本(并且您的新部署在/ var / app / current中).

基本上弹性Beanstalk将在重新启动Web服务器之后执行/ opt / elasticbeanstalk / hooks / appdeploy / post中的任何脚本.这意味着如果您将shell脚本放在此目录中,它们将被运行.

我创建了一个这样的shell脚本：

#!/usr/bin/env bash
. /opt/elasticbeanstalk/support/envvars
cd $EB_CONFIG_APP_CURRENT
su -c "RAILS_ENV=production script/delayed_job --pid-dir=$EB_CONFIG_APP_SUPPORT/pids restart" $EB_CONFIG_APP_USER

我把这个脚本上传到一个S3桶,确保它是“公开的”.然后,您可以使用.ebextensions目录(例如99delayed_job.config)中的选项脚本来部署此脚本作为应用程序部署的一部分,请注意,post目录可能不存在：

commands:
  create_post_dir:
    command: "mkdir /opt/elasticbeanstalk/hooks/appdeploy/post"
    ignoreErrors: true
files:
  "/opt/elasticbeanstalk/hooks/appdeploy/post/99_restart_delayed_job.sh":
    mode: "000755"
    owner: root
    group: root
    source: http://YOUR_BUCKET.s3.amazonaws.com/99_restart_delayed_job.sh

部署时,您应该在/var/log/eb-tools.log中看到类似的内容：

2013-05-16 01:20:53,759 [INFO] (6467 MainThread) [directoryHooksExecutor.py-29] [root directoryHooksExecutor info] Executing directory: /opt/elasticbeanstalk/hooks/appdeploy/post/
2013-05-16 01:20:53,760 [INFO] (6467 MainThread) [directoryHooksExecutor.py-29] [root directoryHooksExecutor info] Executing script: /opt/elasticbeanstalk/hooks/appdeploy/post/99_restart_delayed_job.sh
2013-05-16 01:21:02,619 [INFO] (6467 MainThread) [directoryHooksExecutor.py-29] [root directoryHooksExecutor info] Output from script: delayed_job: trying to stop process with pid 6139...
delayed_job: process with pid 6139 successfully stopped.

2013-05-16 01:21:02,620 [INFO] (6467 MainThread) [directoryHooksExecutor.py-29] [root directoryHooksExecutor info] Script succeeded.

正如我所说,把这些东西放在这个“post”目录中是没有文件的 – 但是希望在某些时候,亚马逊在.options脚本中添加实际的支持来运行命令后部署,在这种情况下,你可以把它移到官方支持的方法.