In this tutorial, we will show you how to install Alerta on nixOS Latest. Alerta is an open-source solution that enables you to receive and respond to alerts from various monitoring systems like Nagios, Zabbix, Prometheus, and many others.
Before we start, there are a few prerequisites to be met:
The first step is to update your system to ensure that all the packages are up-to-date. Run the following command:
$ sudo nix-channel --update && sudo nixos-rebuild switch
To install Alerta on nixOS, we need to write a nix expression file. Navigate to the nixos
directory and create a new file:
$ cd /etc/nixos && sudo vim alerta.nix
Paste the following code in the file:
{ config, pkgs, ... }:
let
alerta = pkgs.python3Packages.callPackage (pkgs.fetchFromGitHub {
owner = "alerta";
repo = "alerta";
rev = "v8.1.0";
sha256 = "12zggp61ksp45zn0vk8w4w4pkz4x2gdxd1xl21xz9rcaxdai4a7p";
}) {
inherit pkgs;
};
in
{
environment.systemPackages = [ alerta ];
}
Save the file and close it. This code downloads the Alerta package from GitHub and installs it.
Now that we have written our nix expression file, we need to activate it. Run the following command:
$ sudo nixos-rebuild switch
This command rebuilds your system's configuration and installs the Alerta package.
Once you have successfully installed Alerta, the next step is to configure it. Alerta uses a configuration file, which is located at /etc/alertad.conf
. Edit this file to configure Alerta.
$ vim /etc/alertad.conf
Add the following configurations in the file:
DEBUG = False
ALERTA_SVR_ENDPOINT = 'http://localhost:8080'
ALLOWED_ENVIRONMENTS = ['Production']
HEARTBEAT_THRESHOLD = 120
ERROR_THRESHOLD = 360
Save and close the file.
After configuring Alerta, we need to start the service. Run the following command:
$ sudo systemctl enable alertad && sudo systemctl start alertad
This command enables the Alerta service and starts it.
Congratulations! You have now successfully installed and configured Alerta on nixOS Latest using a nix expression file. You can now use Alerta to receive and respond to alerts from various monitoring systems.
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