nixos-config/services/monitoring.nix

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{
config,
lib,
pkgs,
...
}: let
inherit
(lib)
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mkEnableOption
mkIf
mkOption
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;
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cfg = config.my.services.monitoring;
domain = config.networking.domain;
hostname = config.networking.hostName;
fqdn = "${hostname}.${domain}";
in {
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options.my.services.monitoring = let
inherit (lib) types;
in {
enable = mkEnableOption "Enable monitoring";
domain = mkOption {
type = types.str;
default = "monitoring.${config.networking.domain}";
example = "monitoring.example.com";
description = "Domain to use in reverse proxy";
};
scrapeInterval = mkOption {
type = types.str;
default = "15s";
example = "1m";
description = "prometheus scrape interval";
};
};
config = mkIf cfg.enable {
services.grafana = {
enable = true;
domain = cfg.domain;
port = 3000;
addr = "127.0.0.1";
provision = {
enable = true;
datasources = [
{
name = "Prometheus";
type = "prometheus";
url = "http://localhost:${toString config.services.prometheus.port}";
jsonData = {
timeInterval = cfg.scrapeInterval;
};
}
];
dashboards = [
{
name = "Node Exporter";
options.path = pkgs.packages.grafanaDashboards.node-exporter;
disableDeletion = true;
}
{
name = "NGINX";
options.path = pkgs.packages.grafanaDashboards.nginx;
disableDeletion = true;
}
];
};
};
services.prometheus = {
enable = true;
port = 9090;
listenAddress = "127.0.0.1";
retentionTime = "2y";
exporters = {
node = {
enable = true;
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enabledCollectors = ["systemd"];
port = 9100;
listenAddress = "127.0.0.1";
};
};
globalConfig = {
scrape_interval = cfg.scrapeInterval;
};
scrapeConfigs = [
{
job_name = config.networking.hostName;
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static_configs = [
{
targets = ["127.0.0.1:${toString config.services.prometheus.exporters.node.port}"];
}
];
}
];
};
services.nginx = {
virtualHosts.${cfg.domain} = {
locations."/" = {
proxyPass = "http://127.0.0.1:${toString config.services.grafana.port}";
proxyWebsockets = true;
};
forceSSL = true;
useACMEHost = fqdn;
};
};
security.acme.certs.${fqdn}.extraDomainNames = [cfg.domain];
};
}