Use Deployer for elastic deployment of PHP applications

Using Deployer for elastic deployment of PHP applications

Introduction:
In today's cloud native era, elastic deployment is a very important technology. It allows us to dynamically adjust resources based on demand, ensuring application stability and reliability. For flexible deployment of PHP applications, Deployer is a powerful and flexible tool. This article will introduce you to how to use Deployer to achieve elastic deployment of PHP applications.

1. Introduction to Deployer
Deployer is a command line tool written in pure PHP, used to automatically deploy PHP applications. It can help us easily deploy applications in different environments and provides a wealth of plug-ins to extend its functionality.

2. Install Deployer
Before using Deployer, you first need to install it in your development environment. You can use Composer to install Deployer. Open the terminal and execute the following command:

composer global require deployer/deployer

3. Configure Deployer
After the installation is complete, we need to configure Deployer to connect to the target server and perform deployment tasks. Create a deploy.php file in your project root directory and copy the following code into the file:

require 'recipe/common.php';

// 服务器连接配置
server('production', 'your_server_ip')
    ->user('your_username')
    ->port(22)
    ->identityFile('~/.ssh/id_rsa')
    ->stage('production')
    ->env('deploy_path', '/var/www/html');

// 项目仓库配置
set('repository', 'your_repository');

// 代码分支配置
set('branch', 'master');

// 需要部署的文件/目录
set('shared_files', ['.env']);
set('shared_dirs', ['storage']);

// 执行部署任务
task('deploy', [
    'deploy:prepare',
    'deploy:lock',
    'deploy:release',
    'deploy:update_code',
    'deploy:shared',
    'deploy:writable',
    'deploy:symlink',
    'deploy:unlock',
    'cleanup',
])->desc('Deploy the PHP application');

// 部署失败时回滚任务
task('deploy:failed', function () {
    run('cd {{release_path}} && ./artisan migrate:rollback --force');
});

// 部署后执行清理任务
after('deploy', 'deploy:cleanup');

Please make the appropriate modifications and settings based on your server configuration Your code repository and branches.

4. Writing deployment tasks
Deployer allows us to write custom tasks and execute them during the deployment process. At the end of the deploy.php file you can add your own tasks. For example, the following is a simple task to restart PHP-FPM after deployment:

task('php-fpm:restart', function () {
    run('sudo service php7.4-fpm restart');
})->desc('Restart PHP-FPM');

after('deploy', 'php-fpm:restart');

You can add more tasks according to your actual needs.

5. Execute deployment
After completing the configuration and task writing, we can execute the deployment command to deploy our PHP application. In the terminal, go to your project root directory and execute the following command:

dep deploy production

Deployer will connect to the target server and perform the deployment process according to your configuration and tasks. You can see detailed output of the deployment process in the terminal.

6. Conclusion
Using Deployer for flexible deployment of PHP applications can help us deploy and manage applications quickly and easily. By configuring and writing custom tasks, we can adapt to different environments and needs, ensuring the flexibility and stability of the application. I hope this article helps you better understand and apply the concepts and tools of resilient deployment.

Reference materials:

• Deployer official documentation: https://deployer.org/
• Deployer GitHub repository: https://github.com/deployphp/ deployer

The above is an introduction and example of using Deployer for flexible deployment of PHP applications. Hope this helps!

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