How to use Deployer to deploy PHP applications on multiple servers simultaneously

How to use Deployer to deploy PHP applications on multiple servers simultaneously

Introduction:
In the increasingly developing Internet era, deploying PHP applications to multiple servers has become a common requirement. In order to improve work efficiency and reduce error rates, we can use some automation tools to deploy applications on multiple servers simultaneously. This article will describe how to use the Deployer tool to achieve this goal, accompanied by code examples.

Part 1: What is Deployer?
Deployer is a PHP-based automated deployment tool that simplifies the application deployment process. With Deployer, you can automate deployment by writing simple configuration files and tasks, and deploy applications on multiple servers simultaneously.

Part 2: Install and configure Deployer

1. Install Deployer
   Execute the following command in the root directory of the project to install Deployer:

   composer require deployer/deployer --dev

2. Create Deployer configuration file
   Create a file named deploy.php in the root directory of the project with the following content:

   <?php
   namespace Deployer;
   
   require 'recipe/common.php';
   
   // 服务器配置
   host('server1')
    ->set('deploy_path', '/var/www/html/app1');
   
   host('server2')
    ->set('deploy_path', '/var/www/html/app2');
   
   // 项目配置
   set('repository', 'git@github.com:user/repo.git');
   set('git_tty', false);
   
   // 服务器部署任务
   task('deploy', [
    'deploy:info',
    'deploy:prepare',
    'deploy:lock',
    'deploy:release',
    'deploy:update_code',
    'deploy:shared',
    'deploy:writable',
    'deploy:vendors',
    'deploy:clear_paths',
    'deploy:symlink',
    'deploy:unlock',
    'cleanup',
   ]);
   
   // 自定义任务
   task('build', function () {
    run('cd {{release_path}} && build');
   });
   
   // 执行自定义任务
   after('deploy:vendors', 'build');
   
   // 运行部署任务
   after('deploy', 'deploy:cleanup');
   ?>

Part 3: Deploy the application using Deployer

1. Deploy the application to multiple servers
   Execute the following command to deploy the application to multiple servers:

   dep deploy server1 server2

   Deployer will execute the task list in the configuration file and deploy the application to the specified server.

2. Perform custom tasks
   In addition to deployment tasks, Deployer also supports custom tasks. In the configuration file, we define a task called build, which will be executed after the deployment is completed. You can add more custom tasks based on your needs.

Part 4: Summary
Using the Deployer tool can easily achieve the goal of deploying PHP applications on multiple servers at the same time. Through simple configuration and task writing, we are able to increase productivity and reduce error rates. I hope this article will help you understand the use of Deployer.

Appendix:
For other functions and configuration items supported by Deployer, please refer to the official documentation: https://deployer.org/

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