The writer chosen the Apache Software Foundation for a contribution within the prepare for DOnations system.
Introduction
If you have critical internet sites you’ll want to know when they are having any issues in order to fix all of them before there’s an impression on the customers. One way to obtain notifications is created alerts through a text-based speak program.
Dissension is a managed cam system much like Slack. With Discord, you can created a totally free messaging system that allows you to communicate with sms, imagery, sound, and videos. Although it provides premium characteristics, possible join free of charge, and contains people readily available for Microsoft windows, macOS, Linux, Android os, and iOS.
Within this tutorial, you will arrange your own Discord host, build a Discord webhook, write a Bash software that’ll look into the condition of a summary of sites, and test announcements out of your host towards dissension station.
Prerequisites
Before you begin this guide you’ll need to have the following:
An Ubuntu 18.04 servers that can manage your own tracking software and speak with Discord (monitor-server). You are able to put this machine upwards by using this Initial Server create Tips Guide.
Any time you don’t posses an internet site . you would like to keep track of but, setup the apache-server with how-to apply the Apache Web host on Ubuntu 18.04 and make sure to perform action 5 on setting-up a virtual host.
a dissension membership. You can travel to the Discord registration page to sign up for a free Discord levels.
Step 1 — Starting Their Dissension Webhook
Once you’ve exposed the Discord membership you’ll be able to create your very own exclusive Discord machine.
Initially, log in to their dissension accounts inside internet browser or begin your own Discord application and then click from the Make a host switch.
Next select a reputation for your machine and then click from the generate a servers button.
Subsequent, you’ll configure their Discord webhook. The webhooks become unique URLs that can be used to link treatments collectively. Discord’s webhooks enable you to speed up your own communications and send facts posts to your Dissension text channels.
Within this tutorial, you’ll send an alerts to your webhook whenever a specific solution on your server goes down, and Discord will ensure you will get those communications on your station.
To produce a webhook you need to first select their route immediately after which click the revise route button appropriate close to your own channel’s identity.
Subsequently go through the Webhooks case and then click the build Webhook key.
After that, select a name for your webhook, within this tutorial we’ll usage notifications as this is exactly what the Bash software can do—alert us in case this 1 of our sites goes down.
Replicate your own webhook URL and rescue it for later. Finally, click the rescue switch.
You’ve got their Discord profile, host, and webhook. Anybody can proceed to write a test apply for the program to monitor.
Step 2 — producing a Test File (Optional)
Should you don’t get own website to check already, complete this task to add an examination file to test just how their tracking script will work fine. Always work these commands in your apache-server.
Very first, create the examination file aided by the after order:
Add some content your file, so you can check it’s working:
Salvage and leave the document.
Now navigate to http:// your_domain /test inside internet browser to make sure you can get the book during the examination file.
Next action, you’ll beginning to create your monitoring program.
Step Three — Promoting Their Spying Script
Now you’ve configured your webhook, you’ll go ahead meet singles Oklahoma and create your Bash program that may look at the responses rule of your own web pages. In case any of the web pages return an updates distinct from 200 OK , your own program will be sending a request toward Discord webhook which means you will get a notification inside Discord channel.
Note: you could utilize any other program writing language to build a software such as this.
First SSH into the monitor-server that you’re using to operate your own spying script.
Begin by creating a document at home folder. We’ll name the file check_status.sh within this guide.
With your preferred text editor open the file:
For the system loader to acknowledge this executable file as a Bash software, include the next range to the top in the file:
All contours you start with a # were a remark. The commentary include optional, but creating commentary in your program will likely make it more convenient for other individuals in order to comprehend precisely what the program do:
Further, identify your Discord webhook as an adjustable. Put the URL your duplicated earlier to suit your webhook:
As you’ll potentially utilize this program to evaluate the standing of several internet sites, render an adjustable known as websites_list and shop the names of domain or IP contact of the web sites that you want to keep track of. If you’re making use of the elective examination document within this information, ensure that you create /test after your own domain or IP address:
In the case you are keeping track of one or more internet site, you can include a lot more domain names or IP address contact information on the websites_list variable and employ room as a separator:
Today you’ll want to loop through the set of website and look their own position. To do so incorporate the subsequent for loop towards file:
This for loop will go through each product within the websites_list adjustable and check the updates in the website utilizing the curl order.
The echo $status_code statement will print the feedback standing of the curl demand. If the website are working needlessly to say the curl command will return a reply code 200 okay , and thus the web site are ready to go. Otherwise you’ll see another response code.
Inside concerning loop, include an if statement to test if the responses signal is actually 200 or not. When the impulse code try 200 after that this means that the website are operating and you wouldn’t want a Discord notification. Put here conditional block to your document:
If you will find any issues with the internet site after that you’ll bring yet another feedback rule, within celebration you’ll would you like to see a notification via the Discord webhook.
To transmit the notice you need the curl command to submit A POST request toward dissension webhook Address.
Create these curl consult inside your if report:
Today let’s study the many arguments: