Monitoring App

I recently started trying to create a setup that can monitor CPU and RAM usage on a remote server. After quite a bit of thinking I created a SQL database and shell script that saved outputted data into the DB. This wasn’t ideal for remote servers so I created a poor man’s API with Node & Express. It takes a web call from remote systems running a shell script on a schedule. It then saves it to a table and I’m using grafana to visualize the data. Its in a super early state now with no validation but it is functional. Here’s my code for Node:

var express = require('express');
var router = express.Router();
var bodyParser = require('body-parser');
var mysql = require('mysql');
var con = mysql.createConnection({
host:"localhost",
user:"perfmon",
password:"passwordhere",
database:"perfmon"
});
con.connect(function (err) {
if (err) throwerr;
console.log("Connected to SQL database");
});
/* GET home page. */
router.get('/', function (req, res, next) {
varserverName=req.query.serverName;
varCPU=req.query.CPU;
varRAM=req.query.RAM;
//sqlInsertPerfmon = "INSERT INTO serverbuilddata (ServerName, CPUCount, RAMCount) VALUES ('" + serverName + "'," + CPUCount + "," + serverMemory + ');'
sqlInsertPerfmon="INSERT INTO perfdata (serverName, CPU, RAM) VALUES ('"+serverName+"',"+CPU+","+RAM+");"
console.log('SQL Statement: '+sqlInsertPerfmon);
con.query(sqlInsertPerfmon, function (err, result) {
if (err) throw(err);
console.log("Performance Data Logged");
res.render('perfmon', { title:'Perfmon', serverName:serverName, CPU:CPU, RAM:RAM });
});
});
module.exports = router;