MySQL使用 Lambda 将 RDS 转储到 S3

Question

我正在寻找如何使用 Lambda 将 RDS 导出到 S3，到目前为止，我找到了一个 Python 节点和 Java API，但我找不到一种在没有实际的情况下以编程方式运行 mysqldump 之类的方法可执行文件。

有办法吗？

我正在考虑使用node.js来调用SHOW CREATE TABLE对于SHOW TABLES

中的每个元素

然后以某种方式创建扩展的 INSERT 语句。

Answer 1

是的，这是可能的，不过您需要在 lambda 包中包含 mysqldump 可执行文件!

Node.js 中的示例脚本，用于使用 mysqldump 进行备份并上传到 S3。

var S3 = require('./S3Uploader'); //custom S3 wrapper with stream upload functionality

var fs = require('fs');
var path = require('path');
var util = require('util');

const writeFile = util.promisify(fs.writeFile);

const execFile = util.promisify(require('child_process').execFile);
const exec = util.promisify(require('child_process').exec);

async function backupToS3(){

    var backupName = 'mysqlbackup-'+new Date().toISOString()+'.gz'

    var content = `cd /tmp
                   BACKUPNAME="[BACKUP_NAME]"
                  [EXE_PATH]/mysqldump --host [DB_ENDPOINT] --port [DB_PORT] -u [DB_USER] --password="[DB_PASS]" [DB_NAME] | gzip -c > $BACKUPNAME
                  `;
    content = content.replace('[BACKUP_NAME]', backupName);
    content = content.replace('[DB_ENDPOINT]', 'xx'); //get from lambda environment variables
    content = content.replace('[DB_PORT]', 'xx'); //get from lambda environment variables
    content = content.replace('[DB_USER]', 'xx'); //get from lambda environment variables
    content = content.replace('[DB_PASS]', 'xx'); //get from lambda environment variables
    content = content.replace('[DB_NAME]', 'xx'); //get from lambda environment variables
    content = content.replace('[EXE_PATH]', __dirname+'/tools'); //path where mysqldump executable is located withing the lambda package

    //generate backup script
    await writeFile('/tmp/db_backup.sh', content);
    fs.chmodSync('/tmp/db_backup.sh', '755');

    //run script
    var res1 = await execFile('/tmp/db_backup.sh');

    //stream upload to S3
    var res2 = await S3.uploadFile('/tmp/'+backupName, 'backups');

    //cleanup local backup (this should cleanup automatically according to lambda lifecycle)
    var res3 = await exec('rm /tmp/'+backupName);

    return  'Backup complete';
};

示例 S3Uploader 发布在此处 - Loading File directly from Node js req body to S3