AWS Lambda 函数无法从 EC2 实例访问 MySQL 数据库：SequelizeConnectionError connect ETIMEDOUT

Question

我正在尝试访问安装在 EC2 实例中的 MySQL 数据库。我用 express js 编写了一个简单的 AWS Lambda 函数。 lambda 函数需要访问 MySQL。当它试图在 EC2 上建立数据库连接时，我得到了下面的每个人：

{
    "errorType": "SequelizeConnectionError",
    "errorMessage": "connect ETIMEDOUT",
    "name": "SequelizeConnectionError",
    "parent": {
        "errorType": "Error",
        "errorMessage": "connect ETIMEDOUT",
        "code": "ETIMEDOUT",
        "errorno": "ETIMEDOUT",
        "syscall": "connect",
        "fatal": true,
        "stack": [
            "Error: connect ETIMEDOUT",
            "    at Connection._handleTimeoutError (/var/task/node_modules/mysql2/lib/connection.js:173:17)",
            "    at ontimeout (timers.js:436:11)",
            "    at tryOnTimeout (timers.js:300:5)",
            "    at listOnTimeout (timers.js:263:5)",
            "    at Timer.processTimers (timers.js:223:10)"
        ]
    },
    "original": {
        "errorType": "Error",
        "errorMessage": "connect ETIMEDOUT",
        "code": "ETIMEDOUT",
        "errorno": "ETIMEDOUT",
        "syscall": "connect",
        "fatal": true,
        "stack": [
            "Error: connect ETIMEDOUT",
            "    at Connection._handleTimeoutError (/var/task/node_modules/mysql2/lib/connection.js:173:17)",
            "    at ontimeout (timers.js:436:11)",
            "    at tryOnTimeout (timers.js:300:5)",
            "    at listOnTimeout (timers.js:263:5)",
            "    at Timer.processTimers (timers.js:223:10)"
        ]
    },
    "stack": [
        "SequelizeConnectionError: connect ETIMEDOUT",
        "    at Utils.Promise.tap.then.catch.err (/var/task/node_modules/sequelize/lib/dialects/mysql/connection-manager.js:149:19)",
        "    at tryCatcher (/var/task/node_modules/bluebird/js/release/util.js:16:23)",
        "    at Promise._settlePromiseFromHandler (/var/task/node_modules/bluebird/js/release/promise.js:512:31)",
        "    at Promise._settlePromise (/var/task/node_modules/bluebird/js/release/promise.js:569:18)",
        "    at Promise._settlePromise0 (/var/task/node_modules/bluebird/js/release/promise.js:614:10)",
        "    at Promise._settlePromises (/var/task/node_modules/bluebird/js/release/promise.js:689:18)",
        "    at Async._drainQueue (/var/task/node_modules/bluebird/js/release/async.js:133:16)",
        "    at Async._drainQueues (/var/task/node_modules/bluebird/js/release/async.js:143:10)",
        "    at Immediate.Async.drainQueues [as _onImmediate] (/var/task/node_modules/bluebird/js/release/async.js:17:14)",
        "    at runCallback (timers.js:705:18)",
        "    at tryOnImmediate (timers.js:676:5)",
        "    at processImmediate (timers.js:658:5)"
    ]
}

ec2的配置是：-

入站规则：

出站规则

Lambda 函数

注意：vpc、子网和安全组在 EC2 和 lambda 中是相同的

这是我的代码：- Lambda Function Code

非常感谢任何帮助！

Answer 1

如果您想从 lambda 函数连接到 ec2 实例。

首先，Ec2 instances 和 lambda 函数在同一个 VPC 中，并且

其次，您必须为 lambda 函数创建 NAT gateway。 EC2 实例的子网和 lambda 函数的子网应该通过相同的NAT gateway 路由。

例如：