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我在谷歌云上有一个托管节点应用程序和 mysql。我尝试了所有可能的方法来从节点连接 mysql，但每次它都会抛出这个错误。

    let pool;
    const createPool = async () => {
      pool = await mysql.createPool({
       //   host: "35.200.129.217",
    socketPath:"/cloudsql/idyllic-anvil-256103:asia-south1:database",
      user: "abc@gmail.com",
      password: "pass",
      database: "db"
      });
    };
    createPool();

    app.get("/getnews", (request, response) => {
    createPool.query('SELECT * FROM db.mydb', function (err, result) {
        if (err) throw new Error(err)
        response.send(result);
    })
    });

错误：

    2019-10-19 16:33:40 default[20191019t215943]  Error: Error: connect ETIMEDOUT      at Query._callback (/srv/index.js:42:20)      at Query.Sequence.end (/srv/node_modules/mysql/lib/protocol/sequences/Sequence.js:83:24)      at /srv/node_modules/mysql/lib/Pool.js:205:13      at Handshake.onConnect (/srv/node_modules/mysql/lib/Pool.js:58:9)      at Handshake.<anonymous> (/srv/node_modules/mysql/lib/Connection.js:525:10)      at Handshake._callback (/srv/node_modules/mysql/lib/Connection.js:491:16)      at Handshake.Sequence.end (/srv/node_modules/mysql/lib/protocol/sequences/Sequence.js:83:24)      at Protocol.handleNetworkError (/srv/node_modules/mysql/lib/protocol/Protocol.js:369:14)      at PoolConnection.Connection._handleNetworkError (/srv/node_modules/mysql/lib/Connection.js:421:18)      at PoolConnection.Connection._handleConnectTimeout (/srv/node_modules/mysql/lib/Connection.js:417:8)
    2019-10-19 16:34:16 default[20191019t220300]  "GET / HTTP/1.1" 304
    2019-10-19 16:34:18 default[20191019t220300]  Server listening on port 8081...
    2019-10-19 16:34:18 default[20191019t220300]  Database connection was refused.
    2019-10-19 16:34:22 default[20191019t220300]  "GET /getnews HTTP/1.1" 502
    2019-10-19 16:34:22 default[20191019t220300]  /srv/index.js:42
    2019-10-19 16:34:22 default[20191019t220300]      if (err) throw new Error(err)
    2019-10-19 16:34:22 default[20191019t220300]               ^
    2019-10-19 16:34:22 default[20191019t220300]
    2019-10-19 16:34:23 default[20191019t220300]  Error: Error: connect ECONNREFUSED /cloudsql/idyllic-anvil-256103:asia-south1:database      at Query._callback (/srv/index.js:42:20)      at Query.Sequence.end (/srv/node_modules/mysql/lib/protocol/sequences/Sequence.js:83:24)      at /srv/node_modules/mysql/lib/Pool.js:205:13      at Handshake.onConnect (/srv/node_modules/mysql/lib/Pool.js:58:9)      at Handshake.<anonymous> (/srv/node_modules/mysql/lib/Connection.js:525:10)      at Handshake._callback (/srv/node_modules/mysql/lib/Connection.js:491:16)      at Handshake.Sequence.end (/srv/node_modules/mysql/lib/protocol/sequences/Sequence.js:83:24)      at Protocol.handleNetworkError `enter code here`(/srv/node_modules/mysql/lib/protocol/Protocol.js:369:14)      at PoolConnection.Connection._handleNetworkError (/srv/node_modules/mysql/lib/Connection.js:421:18)      at Socket.emit (events.js:198:13)
4

1 回答 1

1

确保按照从 App Engine 连接到 Cloud SQL 中的说明进行操作。特别是，以下几点很容易被忽略：

  • 确保您的服务帐户连接具有Cloud SQL ClientIAM 角色，或页面上列出的权限
  • 如果使用 App Engine Flex，请确保您的拼写正确app.yaml

最后，请务必查看管理数据库连接页面。特别是，在上面的示例中，您正在使用名称初始化一个函数，然后对该函数调用查询。相反，您应该使用池来执行查询：


let pool; // <---- This is the pool that `createPool` will set
const createPool = async () => {
  pool = await mysql.createPool({
    socketPath:"/cloudsql/idyllic-anvil-256103:asia-south1:database",
    user: "abc@gmail.com", //<--- just FYI, this should be the database user, not the GCP account connecting
    password: "pass",
    database: "db"
  });
};
createPool(); // <----- This is where `pool` is actually created


// Now we can use the pool to query like this:
try {
  const stmt = 'INSERT INTO votes (time_cast, candidate) VALUES (?, ?)';
  // Pool.query automatically checks out, uses, and releases a connection
  // back into the pool, ensuring it is always returned successfully.
  await pool.query(stmt, [timestamp, team]);
} catch (err) {
  // If something goes wrong, handle the error in this section. This might
  // involve retrying or adjusting parameters depending on the situation.
  // ...
}
于 2019-10-21T15:48:00.940 回答