A node.js app for monitoring web site availability with visual alerting using a Luxafor LED device.
Initially used to turn a Raspberry Pi into a basic web monitoring tool. My goal was to have a monitor with a visual way to identify if a remote server was down. I was already getting emails/txt messages if/when downtime happened but ocassionally I'd miss those if email was turned off and/or phone was muted, in drawer, etc...
The light simply turns red if any one of the monitored servers goes offline for any reason. It looks for a specific keyword from the URL (see luxaforMonitor.php as an example), if the key word exisits it turns the light green, if not it turns the light red. If one monitored server is down the red light flips on - you have to determine which server is down (the log file is helpfull here but hopefully you are also alerted in other ways)
I didn't want to run this 24x7x365 so it allows for setting a daily start end end time as well as a setting to have it run on only specific days of the week (no need to run it before 7:00 AM or after 6:00 PM or on Saturday & Sunday in my case.)
As an option, you can have this send an email with the Raspberry's IP address to an email address on startup. (I found that useful for running the Raspberry headless)
Additionally you can use this to turn your Luxafor on or off
Requires node async, fs and request
npm install async
npm install fs
npm install request
Also requires node-luxafor: https://github.com/dave-irvine/node-luxafor
npm install luxafor
which requires node-usb: https://github.com/nonolith/node-usb
npm install usb
If sendMailOnStart is set to true, nodemail is required: https://github.com/nodemailer/nodemailer
npm install nodemailer
Found in luxaforMonitor.config
config.startTime = 7; //Monitor start time
config.endTime = 18; //Monitor end time - will only monitor between these times
config.includeDays = [1,2,3,4,5]; //An array of days of the week to run Sunday=0, Saturday=6
config.counterInterval = 60; //Run the check every x seconds
config.upKeyword = "Success"; //Key word to look for
config.logFilePath = "/home/user/"; //Log file path
config.sendMailOnStart = true;
config.emailUser = "[email protected]"; //Needs to be a gmail account
config.emailPassword = "user_password"; //If 2 factor auth is on, use an app password
config.emailTo = "[email protected]";
//An array of URLs to check
//Each value should be URL|Friendly name
//URL is what is monitored, Friendly name is what gets logged
config.urlsToCheck = ["http://url.com/luxaforMonitor.php|My URL",
"http://url2.com/luxaforMonitor.php|My URL 2",
"http://url3.com/luxaforMonitor.php|My URL 3"];
Standard use
node /home/user/luxaforMonitor
Run with logging to console in addition to .log file
node /home/user/luxaforMonitor true
Seems the best thing to do is to add
node /home/user/luxaforMonitor.js
to the /etc/rc.local file so it autostarts if the system reboots for any reason. http://raspberrypi.stackexchange.com/a/9734/65427
Additionally, you can run
#node ~/luxaforMonitor off //Turns it off
#node ~/luxaforMonitor on //Turns it on (white)
#node ~/luxaforMonitor on 255 255 0 //Turns it on (yellow)
to turn off and test the Luxafor