Nodejs mssql server connection throws an error - node.js

Question

I want to connect my mssql database from nodejs.
I am using sequelize and tedious module for this.
My connection configs like this
const sequelize = new Sequelize(
"mydb",
"username", "password", {
host:config_data.host,
"dialect":"mssql",
"port":1433
dialectOptions: {
instanceName: "MSSQLSERVER"
},
},
);
When I tried to run script, it throws an error.
(node:14584) UnhandledPromiseRejectionWarning: SequelizeConnectionError: Failed to connect to 192.168.10.220:1433 - Could not connect (sequence)
I apply all steps in configuration manager.
Enabled TCP/IP
Started Server SQL browser
Added 1433 port to Firewall
There is also additional error when host is "localhost".(Currently writed IP address)
(node:13552) UnhandledPromiseRejectionWarning: SequelizeConnectionError: Failed to connect to localhost:1433
- 4292:error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol:c:\ws\deps\openssl\openssl\ssl\statem\statem_lib.c:1947:
I need to help, is there someone have any idea ?

Answer 1

You need to set encrypt to false in your Sequelize inside options.
const sequelize = new Sequelize(
"mydb",
"username", "password", {
host:config_data.host,
"dialect":"mssql",
"port":1433,
"options": {
encrypt: false,
enableArithAbort: false
},
dialectOptions: {
instanceName: "MSSQLSERVER"
},
},
);

Answer 2

The issue is because of TLS protocol mismatch between Source & Destination server. In my case my App server was Ubuntu 20.04 & my SQL Server(Express 2012) was on Windows server. I also tried to downgrade TLS protocols on Ubuntu but nothing worked. So finally I disabled tls encryption in Sequelize.
Make sure options are given as expected by Sequelize
const sequelize = new Sequelize(dbConfig.DB, dbConfig.USER, dbConfig.PASSWORD, {
host: dbConfig.HOST,
port: dbConfig.PORT,
dialect: dbConfig.dialect,
pool: {
max: dbConfig.pool.max,
min: dbConfig.pool.min,
acquire: dbConfig.pool.acquire,
idle: dbConfig.pool.idle,
},
// The below options are important to supress ssl issue on
// AWS EC2 ubuntu when db server is on windows. There is TLS protocol issue
// Which by using these options we disable tls encryption
dialectOptions: {
// Observe the need for this nested `options` field for MSSQL
options: {
encrypt: false,
enableArithAbort: false
}
}
});