雙機熱備
1. 介紹
文章主要介紹，
EasySwoole使用雙機熱備思路實現代碼不中斷部署。
2. 學習案例
-
- 先部署
9501服務
- 先部署
-
- 單起一個進程，定時輪詢
Git分支是否有新版本發布
- 單起一個進程，定時輪詢
-
- 如有新版本發布，
clone一份
- 如有新版本發布，
-
-
composer update更新庫
-
-
- 啟動
9502服務
- 啟動
-
- 更改
nginx配置為9502并重啟
- 更改
只要有新版本發布，就輪詢上面那幾個步驟
整個過程的簡單架構圖
3. 需要提前了解的知識點
4. Nginx 配置
nginx.conf 配置文件示例
當有新版本發布的時候
EasySwoole自定義進程會將nginx.conf的端口改為最新服務的端口
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
sendfile on;
keepalive_timeout 65;
### 輪詢配置（這里是重點）
upstream easyswoole_release_upstream {
server 127.0.0.1:9501;
server 127.0.0.1:9502;
}
include servers/*;
}
es-release.conf 站點配置文件
該配置文件在 servers 目錄下。（此示例是以 Mac 本地環境作為運行環境）
server {
listen 80;
server_name easyswoole.release.com;
location / {
root html;
index index.html index.htm;
proxy_pass http://easyswoole_release_upstream; ### 這里是重點
}
access_log /usr/local/etc/nginx/logs/es.access.log main;
error_log /usr/local/etc/nginx/logs/es.error.log error;
}5. EasySwoole 代碼實現
代碼只提供實現思路，并且這種腳本，最好單獨去做，比如用
shell腳本，防止服務宕機導致無法正常部署代碼
創建自定義進程類文件
<?php
/**
* This file is part of EasySwoole.
*
* @link http://www.edpy57.cn
* @document http://www.edpy57.cn
* @contact http://www.edpy57.cn/Preface/contact.html
* @license https://github.com/easy-swoole/easyswoole/blob/3.x/LICENSE
*/
namespace App\Release;
use EasySwoole\Component\Process\AbstractProcess;
use Swoole\Coroutine;
class Release extends AbstractProcess
{
public function dolog($msg, $filename = '/Users/xxx/sites/release_log.log')
{
if ($msg) {
error_log($msg . PHP_EOL, 3, $filename);
}
}
protected function run($arg)
{
go(function () {
while (true) {
$shellLog = ' 2>> /Users/xxx/sites/release_log.log';
$this->dolog(date('Y-m-d H:i:s') . '開始檢測代碼是否更新 ===> START <=== ');
// 檢查 Git 是否有新代碼發布
$diffExec = 'cd ' . EASYSWOOLE_ROOT . '; git fetch; git diff --stat master origin/master;';
$this->dolog($diffExec);
$pullResult = exec($diffExec);
$this->dolog('git fetch res: => ' . json_encode($pullResult));
if ($pullResult !== '') {
$this->dolog('有新版本發布' . json_encode($pullResult));
// 新版本項目的目錄
$newVersionPath = '/Users/xxx/sites/release-' . time();
// 開始 clone, 初始化代碼
### 這里需要換成自己的 EasySwoole 項目的 github 地址
$cloneExec = "git clone https://github.com/huizhang-Easyswoole/release.git {$newVersionPath} {$shellLog};cd {$newVersionPath} {$shellLog};composer update {$shellLog}; {$shellLog}";
$this->dolog($cloneExec);
$res = exec($cloneExec, $output, $returnVar);
$this->dolog('git clone res: => ' . json_encode($res, JSON_UNESCAPED_UNICODE));
$this->dolog('新版本代碼 clone end');
// 判斷當前是哪個端口正在服務
$lsofExec = "lsof -i:9501 {$shellLog}";
$this->dolog($lsofExec);
$lsofResult = exec($lsofExec);
$newPort = 9501;
$oldPort = 9502;
if ($lsofResult !== '') {
$newPort = 9502;
$oldPort = 9501;
}
// 將另一個閑置的端口，替換到新版本中
$this->dolog('開始替換端口' . $newPort);
$devConfig = file_get_contents($newVersionPath . '/dev.php');
$devConfig = str_replace($oldPort, $newPort, $devConfig);
file_put_contents($newVersionPath . '/dev.php', $devConfig);
// 啟動新服務(這一刻新舊服務是同時存在的)
$this->dolog('新服務啟動');
$startExec = "cd {$newVersionPath}; php easyswoole.php server start -d {$shellLog}";
$this->dolog($startExec);
exec($startExec);
// 替換 Nginx 配置
$this->dolog('開始替換 nginx 端口');
### 這里需要換成自己服務器環境 nginx 配置文件所在的目錄
$ngConfigPath = '/usr/local/etc/nginx/nginx.conf';
$ngConfig = file_get_contents($ngConfigPath);
$ngConfig = str_replace($oldPort, $newPort, $ngConfig);
file_put_contents($ngConfigPath, $ngConfig);
// 重啟 Nginx 服務
$this->dolog('重啟 nginx ');
$reloadNgExec = "nginx -s reload {$shellLog}";
$this->dolog($reloadNgExec);
exec($reloadNgExec);
// 停掉舊服務
$this->dolog('舊服務停掉');
$stopExec = "cd " . EASYSWOOLE_ROOT . "; php easyswoole.php server stop {$shellLog}";
$this->dolog($stopExec);
exec($stopExec);
// 每 30 秒同步一次代碼
Coroutine::sleep(30);
} else {
Coroutine::sleep(10);
$this->dolog('無新版本更新');
}
}
});
}
}注冊自定義進程
在框架的 EasySwooleEvent 事件（即項目根目錄的 EasySwoolEvent.php）中注冊自定義進程，示例代碼如下：
<?php
/**
* This file is part of EasySwoole.
*
* @link http://www.edpy57.cn
* @document http://www.edpy57.cn
* @contact http://www.edpy57.cn/Preface/contact.html
* @license https://github.com/easy-swoole/easyswoole/blob/3.x/LICENSE
*/
namespace EasySwoole\EasySwoole;
use App\Release\Release;
use EasySwoole\EasySwoole\AbstractInterface\Event;
use EasySwoole\EasySwoole\Swoole\EventRegister;
class EasySwooleEvent implements Event
{
public static function initialize()
{
date_default_timezone_set('Asia/Shanghai');
}
public static function mainServerCreate(EventRegister $register)
{
###### 注冊 雙機熱備服務 自定義進程 ######
$processConfig = new \EasySwoole\Component\Process\Config([
'processName' => 'Es-release', // 設置 自定義進程名稱
'processGroup' => 'Es-release', // 設置 自定義進程組名稱
]);
\EasySwoole\Component\Process\Manager::getInstance()->addProcess(new Release($processConfig));
}
}6. 測試
綁定 host
127.0.0.1 easyswoole.release.com訪問 easyswoole.release.com
查看 Nginx 配置的端口
? nginx cat nginx.conf | grep 950
server 127.0.0.1:9501;發布新版本
重新
clone一份代碼，更改內容提交。
查看Nginx配置的端口
? nginx cat nginx.conf | grep 950
server 127.0.0.1:9502;