nix-config/modules/nixos/services/monitoring/default.nix

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# Grafana dashboards for all the things!
{ config, lib, pkgs, ... }:
let
cfg = config.my.services.monitoring;
in
{
options.my.services.monitoring = with lib; {
enable = mkEnableOption "monitoring";
grafana = {
port = mkOption {
type = types.port;
default = 9500;
example = 3001;
description = "Internal port";
};
username = mkOption {
type = types.str;
default = "ambroisie";
example = "admin";
description = "Admin username";
};
passwordFile = mkOption {
type = types.str;
example = "/var/lib/grafana/password.txt";
description = "Admin password stored in a file";
};
secretKeyFile = mkOption {
type = types.str;
example = "/var/lib/grafana/secret_key.txt";
description = "Secret key stored in a file";
};
};
prometheus = {
port = mkOption {
type = types.port;
default = 9501;
example = 3002;
description = "Internal port";
};
scrapeInterval = mkOption {
type = types.str;
default = "15s";
example = "1m";
description = "Scrape interval";
};
};
};
config = lib.mkIf cfg.enable {
services.grafana = {
enable = true;
settings = {
server = {
domain = "monitoring.${config.networking.domain}";
root_url = "https://monitoring.${config.networking.domain}/";
http_port = cfg.grafana.port;
http_addr = "127.0.0.1"; # Proxied through Nginx
};
security = {
admin_user = cfg.grafana.username;
admin_password = "$__file{${cfg.grafana.passwordFile}}";
secret_key = "$__file{${cfg.grafana.secretKeyFile}}";
};
};
provision = {
enable = true;
datasources.settings.datasources = [
{
name = "Prometheus";
type = "prometheus";
url = "http://localhost:${toString cfg.prometheus.port}";
jsonData = {
timeInterval = cfg.prometheus.scrapeInterval;
};
}
];
dashboards.settings.providers = [
{
name = "Node Exporter";
options.path = pkgs.nur.repos.alarsyo.grafanaDashboards.node-exporter;
disableDeletion = true;
}
];
};
};
services.prometheus = {
enable = true;
port = cfg.prometheus.port;
listenAddress = "127.0.0.1";
retentionTime = "2y";
exporters = {
node = {
enable = true;
enabledCollectors = [ "systemd" ];
port = 9100;
listenAddress = "127.0.0.1";
};
};
globalConfig = {
scrape_interval = cfg.prometheus.scrapeInterval;
};
scrapeConfigs = [
{
job_name = config.networking.hostName;
static_configs = [{
targets = [ "127.0.0.1:${toString config.services.prometheus.exporters.node.port}" ];
}];
}
];
};
my.services.nginx.virtualHosts = {
monitoring = {
inherit (cfg.grafana) port;
};
};
};
}