infrastructure/machines/storage01/prometheus.nix

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{
config,
nodes,
lib,
...
}:
let
host = "prometheus.dgnum.eu";
port = 9091;
nodeExporterConfigs = lib.flatten (
lib.mapAttrsToList (
node:
{ config, ... }:
lib.optional config.dgn-node-monitoring.enable {
targets = [ "${node}.dgnum:${builtins.toString config.dgn-node-monitoring.port}" ];
labels = {
host = node;
};
}
) nodes
);
in
{
services.prometheus = {
enable = true;
inherit port;
checkConfig = "syntax-only";
enableReload = true;
listenAddress = "127.0.0.1";
webConfigFile = config.age.secrets."prometheus-web_config_file".path;
webExternalUrl = "https://${host}";
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retentionTime = "1y";
extraFlags = [ "--storage.tsdb.retention.size=20GB" ];
globalConfig = {
scrape_interval = "15s"; # if you change this settings, please do it in grafana also
};
scrapeConfigs = [
{
job_name = "prometheus";
static_configs = [ { targets = [ "localhost:9090" ]; } ];
}
{
job_name = "node_exporter";
static_configs = nodeExporterConfigs;
}
{
job_name = "uptime_kuma";
scheme = "https";
static_configs = [ { targets = [ "status.dgnum.eu" ]; } ];
basic_auth = {
username = "prometheus";
password_file = config.age.secrets."prometheus-uptime-kuma-apikey".path;
};
}
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{
job_name = "hyp01_ups";
static_configs = [ { targets = [ "100.80.255.180:9199" ]; } ];
}
];
};
services.nginx.virtualHosts.${host} = {
enableACME = true;
forceSSL = true;
locations."/" = {
proxyPass = "http://127.0.0.1:${builtins.toString port}";
proxyWebsockets = true;
recommendedProxySettings = true;
};
};
age-secrets.autoMatch = [ "prometheus" ];
}