How do I connect to an AWS MySQL database in node.js - mysql

Question

I have node.js Lambda function on AWS and a MySQL database. I have been using the following code to connect:
const mysql = require('mysql');
const con = mysql.createConnection({
host: "<endpoint>",
user: "<user>",
password: "<password>"
});
con.connect(function(err) {
if (err) throw err;
console.log("Connected!");
con.end();
});
When I try to connect to the endpoint I get the message:
{"message": "Internal server error"}
Any help would be much appreciated! Hope everyone is healthy.

Answer 1

It is most likely an RDS set-up.
Check the security settings on your security group.
Does it have a rule that only allows a connection from a certain security group?
Also, does your RDS have Public Accessibility? you would want to set it to 'Yes'
The port seems to be missing in your createConnection function, I've seen people skip this while others needed to have it.
Another thing for debugging purpose get the stack as well, it will take you there :)
conn.connect(function(err){
if (err){
console.error('db connection failed: ' + err.stack);
return;
}
console.log('connected to db');
});
connection.end();
Check this link to AWS docs, it is for elastic beanstalk, but it's the same :)
Here is another link/blog post to get you there: using was rds with nodejs