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grafana: Remove prometheus load balancer and offer all instance as possible datasources

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SebastianStork 2026-03-01 14:00:52 +01:00
parent 0e643d568b
commit 4529366841
Signed by: SebastianStork
SSH key fingerprint: SHA256:tRrGdjYOwgHxpSc/wTOZQZEjxcb15P0tyXRsbAfd+2Q
1 changed files with 15 additions and 42 deletions
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57
modules/nixos/web-services/grafana.nix
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@ -7,13 +7,6 @@
}:
let
cfg = config.custom.web-services.grafana;
prometheusDomains =
allHosts
|> lib.attrValues
|> lib.map (host: host.config.custom.services.prometheus)
|> lib.filter (prometheus: prometheus.enable)
|> lib.map (prometheus: prometheus.domain);
in
{
options.custom.web-services.grafana = {
@ -26,15 +19,6 @@ in
type = lib.types.port;
default = 3000;
};
datasources.prometheus = {
enable = lib.mkEnableOption "" // {
default = prometheusDomains != [ ];
};
url = lib.mkOption {
type = lib.types.nonEmptyStr;
default = "https://metrics.${config.custom.networking.overlay.fqdn}";
};
};
dashboards.nodeExporter.enable = lib.mkEnableOption "" // {
default = true;
};
@ -73,19 +57,22 @@ in
datasources.settings = {
prune = true;
datasources = lib.optional cfg.datasources.prometheus.enable {
name = "Prometheus";
type = "prometheus";
inherit (cfg.datasources.prometheus) url;
isDefault = true;
jsonData = {
prometheusType = "Prometheus";
prometheusVersion = "3.7.2";
};
};
datasources =
allHosts
|> lib.attrValues
|> lib.filter (host: host.config.custom.services.prometheus.enable)
|> lib.map (host: {
name = "Prometheus ${host.config.networking.hostName}";
type = "prometheus";
url = "https://${host.config.custom.services.prometheus.domain}";
isDefault = host.config.networking.hostName == config.networking.hostName;
jsonData = {
prometheusType = "Prometheus";
prometheusVersion = "3.7.2";
};
});
};
};
};
# https://grafana.com/grafana/dashboards/1860-node-exporter-full/
@ -98,20 +85,6 @@ in
};
};
custom.services.caddy = {
virtualHosts.${cfg.domain}.port = cfg.port;
virtualHosts."metrics.${config.custom.networking.overlay.fqdn}".extraConfig =
let
upstreams = prometheusDomains |> lib.map (domain: "https://${domain}") |> lib.concatStringsSep " ";
in
''
reverse_proxy ${upstreams} {
header_up Host {upstream_hostport}
lb_policy first
health_uri /api/v1/status/buildinfo
}
'';
};
custom.services.caddy.virtualHosts.${cfg.domain}.port = cfg.port;
};
}