[英]Node app cannot connect to remote MySQL database
節點應用程序在 SERVER1 上,MySQL 在 SERVER2 上
節點應用程序連接代碼:
var mysql = require('mysql');
var con = mysql.createConnection({
host: "REMOTE_IP",
port: "3306",
database: "REMOTE_DATABASE",
user: "REMOTE_USER",
password: "PASSWORD"
});
con.connect(function(err) {
if (err) {
console.log("MySQL connection error: " + err.stack);
process.exit(1);
}
console.log("Connected to MySQL...");
錯誤信息:
MySQL connection error: Error: connect ECONNREFUSED REMOTE_IP:3306
at Object.exports._errnoException (util.js:1018:11)
at exports._exceptionWithHostPort (util.js:1041:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1086:14)
--------------------
at Protocol._enqueue (/home/process/node_modules/mysql/lib/protocol/Protocol.js:145:48)
at Protocol.handshake (/home/process/node_modules/mysql/lib/protocol/Protocol.js:52:23)
at Connection.connect (/home/process/node_modules/mysql/lib/Connection.js:130:18)
at Object.<anonymous> (/home/process/process.js:27:5)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.runMain (module.js:604:10)
at run (bootstrap_node.js:389:7)
at startup (bootstrap_node.js:149:9)
at bootstrap_node.js:504:3
MySQL 在 SERVER2 的 3306 端口上運行:
$ sudo netstat -plunt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 4893/mysqld
SERVER2 上的 UFW 允許端口 3306:
$ sudo ufw status
Status: active
To Action From
-- ------ ----
3306 ALLOW Anywhere
3306 (v6) ALLOW Anywhere (v6)
MySQL 用戶在 SERVER2 上具有遠程訪問權限:
mysql> SELECT * from information_schema.user_privileges where grantee like "'REMOTE_USER'%";
+-----------------------------+---------------+----------------+--------------+
| GRANTEE | TABLE_CATALOG | PRIVILEGE_TYPE | IS_GRANTABLE |
+-----------------------------+---------------+----------------+--------------+
| 'REMOTE_USER'@'localhost' | def | USAGE | NO |
| 'REMOTE_USER'@'SERVER1_PUBLIC_IP' | def | USAGE | NO |
| 'REMOTE_USER'@'SERVER1_PRIVATE_IP' | def | USAGE | NO |
+-----------------------------+---------------+----------------+--------------+
通過 SERVER2 上的命令行連接到 MySQL 工作正常:
$ mysql -u REMOTE_USER -pPASSWORD REMOTE_DATABASE
MySQL 或 UFW 日志中沒有任何內容。
我不知道還有什么要檢查的......
你能想到什么可能導致這種情況嗎?
謝謝。
MySQL 只偵聽本地連接。 請注意您的 netstat 命令:
127.0.0.1:3306
請參閱此答案以了解綁定到 0.0.0.0。 基本上,您只想確保在my.cnf
文件中注釋掉bind-address
,並且它應該開始偵聽所有接口。
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