modules: services: add monitoring

This includes a dashboard to monitor system ressources, using
Prometheus.
This commit is contained in:
Bruno BELANYI 2021-07-13 19:09:27 +02:00
parent 8927b3182f
commit 2458ddf59d
2 changed files with 117 additions and 0 deletions

View file

@ -14,6 +14,7 @@
./lohr.nix
./matrix.nix
./miniflux.nix
./monitoring.nix
./nextcloud.nix
./nginx.nix
./pirate.nix

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@ -0,0 +1,116 @@
# Grafana dashboards for all the things!
{ config, lib, pkgs, ... }:
let
cfg = config.my.services.monitoring;
domain = config.networking.domain;
grafanaDomain = "monitoring.${config.networking.domain}";
in
{
options.my.services.monitoring = with lib; {
enable = mkEnableOption "monitoring";
grafana = {
port = mkOption {
type = types.port;
default = 9500;
example = 3001;
description = "Internal port";
};
username = mkOption {
type = types.str;
default = "ambroisie";
example = "admin";
description = "Admin username";
};
passwordFile = mkOption {
type = types.str;
example = "/var/lib/grafana/password.txt";
description = "Admin password stored in a file";
};
};
prometheus = {
port = mkOption {
type = types.port;
default = 9501;
example = 3002;
description = "Internal port";
};
};
};
config = lib.mkIf cfg.enable {
services.grafana = {
enable = true;
domain = grafanaDomain;
port = cfg.grafana.port;
addr = "127.0.0.1"; # Proxied through Nginx
security = {
adminUser = cfg.grafana.username;
adminPasswordFile = cfg.grafana.passwordFile;
};
provision = {
enable = true;
datasources = [
{
name = "Prometheus";
type = "prometheus";
url = "http://localhost:${toString cfg.prometheus.port}";
}
];
dashboards = [
{
name = "Node Exporter";
options.path = pkgs.nur.repos.alarsyo.grafana-dashboards.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";
};
};
scrapeConfigs = [
{
job_name = config.networking.hostName;
static_configs = [{
targets = [ "127.0.0.1:${toString config.services.prometheus.exporters.node.port}" ];
}];
}
];
};
services.nginx = {
virtualHosts.${grafanaDomain} = {
forceSSL = true;
useACMEHost = domain;
locations."/" = {
proxyPass = "http://127.0.0.1:${toString cfg.grafana.port}";
proxyWebsockets = true;
};
};
};
};
}