思路
1.制作升级包，增量更新
2.升级包上传验证上传文件，验证当前系统版本
3.升级之前要先备份原来的代码，升级失败要进行回滚
4.记录升级日志，返回升级进度
5.升级包应该是加密的（暂时没实现）
说明
1.升级包的目录结构必须如下
/**
* 升级包规定的目录结构
* xxx_版本号.zip(如：xxx_1.0.0.zip)
* |
* |————mysql
* | |
* | |___mysql_update.sql(更新脚本)
* | |___mysql_rockback.sql（回滚脚本）
* |
* |____php
*
*/
2.mysql_update.sql
create table test(id init(11));
create table test2(id init(11));
- mysql_rockback.sql
drop table test;
drop table test2;
4.代码
class UpgradeSys{
public $update_log = "/tmp/web/update_log.log"; //系统升级日志
public $return_log = "/tmp/web/return_log.log"; //系统回滚日志
public $progress_log = "/tmp/web/progress_log.log"; //记录进度
public $root_dir = "/Users/feng/Documents/work/test"; //站点代码的根目录
public $aFile = ["log","runtime"];//忽略文件夹相对路径
public $backup_dir = "/tmp/web/backup_dir";//备份目录
public $upload_dir = "/tmp/web/upload_dir";//升级包目录
public $sys_version_num = '1.0.0';//当前系统的版本 这个在实际应用中应该是虫数据库获取得到的，这里只是举个例子
/** 展示升级界面 */
public function index()
{
include("update.html");
}
/**
* 处理升级包上传
*/
public function upload()
{
$params = $_POST;
if($_FILES)
{
$name = $_FILES['file']['tmp_name'];
if(!$name || !is_uploaded_file($name))
{
echo json_encode(["status"=>0,"msg"=>"请上传升级包文件"]);
die;
}
}
//校验后缀
$astr = explode('.',$name);
$ext = array_pop($astr);
if($ext != 'zip')
{
echo json_encode(["status"=>0,"msg"=>"请上传文件格式不对"]);
die;
}
//校验升级密码
// if(!isset($params['password']) || $params['password'] != $this->password)
// {
// echo json_encode(["status"=>0,"msg"=>"密码错误"]);
// die;
// }
//对比版本号
$astr = explode('_',$name);
$version_num = str_replace(".zip", '',array_pop($astr));
if(!$version_num)
{
echo json_encode(["status"=>0,"msg"=>"获取版本号失败"]);
die;
}
//对比
if(!$this->compare_version($version_num))
{
echo json_encode(["status"=>0,"msg"=>"不能升级低版本的"]);
die;
}
$package_name = $this->upload_dir.'/'.$version_num.'.zip';
if(!move_uploaded_file($name,$package_name))
{
echo json_encode(["status"=>0,"msg"=>"上传文件失败"]);
die;
}
//记录下日志
$this->save_log("上传升级包成功！");
$this->update_progress("20%");
//备份code
$result = $this->backup_code();
if(!$result)
{
$this->save_log("备份失败！");
echo json_encode(["status"=>0,"msg"=>"备份失败"]);
die;
}
$this->update_progress("30%");
//执行升级
$this->execute_update($package_name);
}
/**
* 升级操作
* @return [type] [description]
*/
private function execute_update($package_name)
{
//解压 如何使用zip加密压缩，这里解压缩的时候注意要解密
exec(" cd $upload_dir && unzip $package_name ");
$package_name = str_replace(".zip","",$package_name);
if(!is_dir($package_name))
{
$this->save_log("解压失败");
echo json_encode(["status"=>0,"msg"=>"解压失败"]);
die;
}
$this->update_progress("50%");
//升级mysql
if(file_exists($this->upload_dir.'/'.$package_name."/mysql/mysql_update.sql"))
{
$result = $this->database_operation($this->upload_dir.'/'.$package_name."/mysql/mysql_update.sql");
if(!$result['status'])
{
echo json_encode($result);die;
}
}
$this->update_progress("70%");
//升级PHP
if(is_dir($this->upload_dir.'/'.$package_name.'/php'))
{
exec("cd {$this->upload_dir}/{$package_name}/php && cp -rf ./* $this->root_dir ",$mdata,$status);
if($status != 0 )
{
$this->save_log("php更新失败");
//数据库回滚
if(file_exists($this->upload_dir.'/'.$package_name."/mysql/mysql_rockback.sql"))
{
$this->save_log("数据库回滚");
$this->database_operation($this->upload_dir.'/'.$package_name."/mysql/mysql_rockback.sql");
}
//php代码回滚
$cmd = "cp -rf " .$this->backup_dir."/".$this->sys_version_num.'/'.basename($this->root_dir)."/* ".$this->root_dir;
exec($cmd,$mdata,$status);
$this->save_log("php回滚");
echo json_encode(["status"=>0,"msg"=>"php更新失败"]);
die;
}
}
//把解压的升级包清除
exec("rm -rf $upload_dir/$package_name ");
$this->update_progress("100%");
//更新系统的版本号了
//更新php的版本号了(应该跟svn／git的版本号一致)
//更新数据库的版本号了(应该跟svn／git的版本号一致)
echo json_encode(["status"=>1,"msg"=>"升级成功"]);
die;
}
/**
* 比较代码版本
* @return [type] [description]
*/
private function compare_version($version_num='1.0.0')
{
return version_compare($version_num,$this->sys_version_num,'>');
}
/**
* 备份代码
*/
private function backup_code()
{
//rsync 要确定系统是否已经安装
$cmd = "cd $root_dir && cd .. && rsync -av ";
foreach ($this->aFile as $key => $value) {
$cmd ."--exclude ". basename($this->root_dir) ."/".$value ." ";
}
$cmd .= basename($this->root_dir)." ".$this->backup_dir."/".$this->sys_version_num;
exec($cmd,$mdata,$status);
if($status != 0)
{
return false;
}
//这里还可以对备份的文件进行压缩
return true;
}
/**
* 数据库操作
*/
public function database_operation($file)
{
$mysqli = new mysqli("localhost","root","root","test");
if($mysqli->connect_errno)
{
return ["status"=>0,"msg"=>"Connect failed:".$mysqli->connect_error];
}
$sql = file_get_contents($file);
$a = $mysqli->multi_query($sql);
return ["status"=>1,"msg"=>"数据库操作OK"];
}
/**
* 返回系统升级的进度
*/
public function update_progress($progress)
{
exec(" echo '".$progress."' > $this->progress_log ");
}
/**
* 记录日志
*/
public function save_log($msg,$action="update")
{
$msg .= date("Y-m-d H:i:s").":".$msg."\n";
if($action == "update")
{
exec(" echo '".$msg."' >> $this->update_log ");
}else
{
exec(" echo '".$msg."' >> $this->return_log ");
}
}
}
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