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HomeBackend DevelopmentPHP Tutorial[ Laravel 5.2 文档 ] 服务 -- Envoy Task Runner

1、简介

Laravel Envoy为定义运行在远程主机上的通用任务提供了一套干净、最简化的语法。使用Blade样式语法,你可以轻松为开发设置任务,Artisan命令,以及更多,目前,Envoy 只支持 Mac 和 Linux 操作系统。

1.1 安装

首先,使用 Composer 的 global命令安装 Envoy:

composer global require "laravel/envoy=~1.0"

确保 ~/.composer/vendor/bin目录在系统路径PATH中否则在终端中由于找不到 envoy而无法执行该命令。

更新Envoy

还可以使用 Composer 保持安装的 Envoy 是最新版本:

composer global update

2、编写任务

所有的 Envoy 任务都定义在项目根目录下的 Envoy.blade.php文件中,下面是一个让你开始的示例:

@servers(['web' => 'user@192.168.1.1'])@task('foo', ['on' => 'web'])    ls -la@endtask

正如你所看到的, @servers数组定义在文件顶部,从而允许你在任务声明中使用 on选项引用这些服务器,在  @task声明中,应该放置将要在服务器上运行的Bash代码。

启动

有时候,你需要在评估Envoy任务之前执行一些PHP代码,可以在Envoy文件中使用 @setup指令来声明变量和要执行的PHP代码:

@setup    $now = new DateTime();    $environment = isset($env) ? $env : "testing";@endsetup

还可以使用 @include来引入外部PHP文件:

@include('vendor/autoload.php');

确认任务

如果你想要在服务器上运行给定任务之前弹出弹出提示进行确认,可以在任务声明中使用 confirm指令:

@task('deploy', ['on' => 'web', 'confirm' => true])    cd site    git pull origin {{ $branch }}    php artisan migrate@endtask

2.1 任务变量

如果需要的话,你可以使用命令行开关传递变量到Envoy文件,从而允许你自定义任务:

envoy run deploy --branch=master

你可以在任务中通过Blade的“echo”语法使用该选项:

@servers(['web' => '192.168.1.1'])@task('deploy', ['on' => 'web'])    cd site    git pull origin {{ $branch }}    php artisan migrate@endtask

2.2 多个服务器

你可以轻松地在多主机上运行同一个任务,首先,添加额外服务器到 @servers声明,每个服务器应该被指配一个唯一的名字。定义好服务器后,在任务声明中简单列出所有服务器即可:

@servers(['web-1' => '192.168.1.1', 'web-2' => '192.168.1.2'])@task('deploy', ['on' => ['web-1', 'web-2']])    cd site    git pull origin {{ $branch }}    php artisan migrate@endtask

默认情况下,该任务将会依次在每个服务器上执行,这意味着,该任务在第一台服务器上运行完成后才会开始在第二台服务器运行。

平行运行

如果你想要在多个服务器上平行运行,添加 parallel选项到任务声明:

@servers(['web-1' => '192.168.1.1', 'web-2' => '192.168.1.2'])@task('deploy', ['on' => ['web-1', 'web-2'], 'parallel' => true])    cd site    git pull origin {{ $branch }}    php artisan migrate@endtask

2.3 任务宏

宏允许你使用单个命令中定义多个依次运行的任务。例如, deploy宏会运行git和composer任务:

@servers(['web' => '192.168.1.1'])@macro('deploy')    git    composer@endmacro@task('git')    git pull origin master@endtask@task('composer')    composer install@endtask

宏被定义好了之后,你就可以通过如下单个命令运行它:

envoy run deploy

3、运行任务

要从 Envoy.blade.php文件中运行一个任务,需要执行Envoy的 run命令,然后传递你要执行的任务的命令名或宏。Envoy将会运行命令并从服务打印输出:

envoy run task

4、通知

4.1 HipChat

运行完一个任务后,可以使用Envoy的 @hipchat指令发送通知到团队的 HipChat房间,该指令接收一个API令牌、房间名称、和用户名:

@servers(['web' => '192.168.1.1'])@task('foo', ['on' => 'web'])    ls -la@endtask@after    @hipchat('token', 'room', 'Envoy')@endafter

需要的话,你还可以传递自定义发送给HipChat房间的消息,所有在Envoy任务中有效的变量在构建消息时也有效:

@after    @hipchat('token', 'room', 'Envoy', "{$task} ran in the {$env} environment.")@endafter

4.2 Slack

除了HipChat之外,Envoy还支持发送通知到 Slack。 @slack指令接收一个Slack钩子URL、频道名称、和你要发送给该频道的消息:

@after    @slack('hook', 'channel', 'message')@endafter

你可以通过创建集成到Slack网站的Incoming WebHooks来获取钩子URL,该hook参数是由 Incoming Webhooks Slack 集成提供的完整webhook URL,例如:

https://hooks.slack.com/services/ZZZZZZZZZ/YYYYYYYYY/XXXXXXXXXXXXXXX

你可以提供下面两种其中之一作为频道参数:

  • 发送消息到频道:  #channel
  • 发送消息到用户:  @user
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