A simple NodeJS application that can monitor one or multiple domains to see if the service is down, and send a notification on Discord to let you know of the incident.

These are all the parameters that can be configured inside the config.json file. An example is also available, see config.json.example for a working example.

seconds_between_scans

• Required: ✅
• Example value: 60
• Description: This determines how long we should wait between each scan in seconds of all the domains.

domains

• Required: ✅
• Example value: []
• Description: The list of domains we need to monitor. Each domain is expected to be provided in a specific format, so please check all the domains[] parameters to see what data you need to provide.

domains[].name

• Required: ✅
• Example value: "Google"
• Description: The name of the domain/service that you are monitoring, it's pretty much a label that you can use to indicate what this domain/service is exactly.

domains[].url

• Required: ✅
• Example value: "https://google.com/"
• Description: The URL of the domain we need to ping, as long as we don't receive a 4XX or 5XX or any network error on that URL, we mark it as available.

domains[].discordWebhookUrl

• Required: ✅
• Example value: "https://discord.com/api/webhooks/XXXXXXXXXXXXXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
• Description: The Discord webhook URL we need to trigger once a domain has been marked as unavailable.

domains[].failedScanCountUntilNotification

• Required: ✅
• Example value: 3
• Description: The amount of times the check needs to fail in a row before we mark the domain as unavailable.

domains[].roleIdToMention

• Required: ❌
• Example value: "1033772800198070345"
• Description: The ID of the role you want to mention inside the uptime notification for that domain. Can be left omitted or set to null if you do not need this.

discord-webhook-uptime-2022.service

[Unit]
After=network-online.target
Wants=network-online.target systemd-networkd-wait-online.service
Description="Service to launch the discord-webhook-uptime application to monitor specific URLs"

StartLimitIntervalSec=300
StartLimitBurst=5


[Service]
WorkingDirectory=/home/pi/projects/discord-webhook-uptime-2022/
ExecStartPre=/bin/bash -c 'until host discord.com; do sleep 1; done; sleep 10'
ExecStart=/home/pi/projects/discord-webhook-uptime-2022/start_service.sh
Restart=on-failure
RestartSec=10s

[Install]
WantedBy=default.target

start_service.sh

#!/bin/bash
echo "Changing node version with NVM..."
. /home/pi/.nvm/nvm.sh;
nvm use
echo "Starting script..."
node main.js