我正在尝试通过 amazon Lambda 访问托管在 amazon RDS 上的 MySQL 数据库。我有 .js 文件,可以在 Windows 上通过 cmd 行运行,但是当我传输到 Lambda 时,我无法连接到数据库。我彻底研究了这个问题,甚至在遵循本指南之后:Redstapler AWS ,我收到“进程在完成请求前退出”错误消息。
我的代码,复制自上面的教程
var mysql = require('mysql');
var pool = mysql.createPool({
host: "",
user: "",
password: "",
database: ""
});
exports.handler = (event,context,callback) => {
context.callbackWaitFOrEmptyEventLoop = false;
pool.getConnection(function(err,connection){
if (err) throw err;
connection.query("SELECT * FROM testdata limit 10",
function(error,result,fields){
connection.release();
if (error) callback(error)
else callback(null,result)
});
});
};
从 Amazon Lambda 收到的错误消息
Response: { "errorMessage": "RequestId: b5151db1-6db8-11e8-8004-1b9e8072561c Process exited before completing request" } Request ID: "b5151db1-6db8-11e8-8004-1b9e8072561c" Function Logs: START RequestId: b5151db1-6db8-11e8-8004-1b9e8072561c Version: $LATEST 2018-06-11T20:48:01.478Z b5151db1-6db8-11e8-8004-1b9e8072561c Error: Handshake inactivity timeout at Handshake. (/var/task/node_modules/mysql/lib/protocol/Protocol.js:164:17) at emitNone (events.js:86:13) at Handshake.emit (events.js:185:7) at Handshake._onTimeout (/var/task/node_modules/mysql/lib/protocol/sequences/Sequence.js:129:8) at ontimeout (timers.js:386:14) at tryOnTimeout (timers.js:250:5) at Timer.listOnTimeout (timers.js:214:5) -------------------- at Protocol._enqueue (/var/task/node_modules/mysql/lib/protocol/Protocol.js:145:48) at Protocol.handshake (/var/task/node_modules/mysql/lib/protocol/Protocol.js:52:23) at PoolConnection.connect (/var/task/node_modules/mysql/lib/Connection.js:130:18) at Pool.getConnection (/var/task/node_modules/mysql/lib/Pool.js:48:16) at exports.handler (/var/task/main.js:11:6) END RequestId: b5151db1-6db8-11e8-8004-1b9e8072561c REPORT RequestId: b5151db1-6db8-11e8-8004-1b9e8072561c Duration: 10074.63 ms Billed Duration: 10100 ms Memory Size: 1280 MB Max Memory Used: 27 MB
RequestId: b5151db1-6db8-11e8-8004-1b9e8072561c Process exited before completing request
本教程评价很高,似乎很有名,但我无法复制它的成功。该错误似乎暗示 connection.release 位于错误的位置,或者我需要有另一种方式来结束连接并将其返回到池中。
最佳答案
检查 RDS 实例安全组是否允许从 lambda IP 地址范围 (https://docs.aws.amazon.com/general/latest/gr/aws-ip-ranges.html) 访问或将 lambda 放在可访问 RDS 实例的 VPC 中。默认情况下,lambda 不在 VPC 中...
关于mysql - 如何使用 Node.js Lambda 函数与 RDS MySQL 实例交互?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/50806322/