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caddy: Expose metrics without the admin api

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SebastianStork 2025-09-23 13:10:24 +02:00
parent c917eed038
commit 3d0d4ea31d
2 changed files with 14 additions and 2 deletions
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2
modules/system/services/alloy.nix
View file

@ -126,7 +126,7 @@ in
text = '' text = ''
prometheus.scrape "caddy" { prometheus.scrape "caddy" {
targets = [{ targets = [{
__address__ = "localhost:2019", __address__ = "localhost:${builtins.toString config.custom.services.caddy.metrics.port}",
instance = constants.hostname, instance = constants.hostname,
}] }]
forward_to = [prometheus.remote_write.default.receiver] forward_to = [prometheus.remote_write.default.receiver]

14
modules/system/services/caddy.nix
View file

@ -31,6 +31,10 @@ in
enable = lib.mkEnableOption "" // { enable = lib.mkEnableOption "" // {
default = virtualHosts != { }; default = virtualHosts != { };
}; };
metrics.port = lib.mkOption {
type = lib.types.port;
default = 49514;
};
virtualHosts = lib.mkOption { virtualHosts = lib.mkOption {
type = lib.types.attrsOf ( type = lib.types.attrsOf (
lib.types.submodule ( lib.types.submodule (
@ -63,9 +67,11 @@ in
}; };
}; };
config = lib.mkIf (virtualHosts != { }) ( config = lib.mkIf (virtualHosts != [ ]) (
lib.mkMerge [ lib.mkMerge [
{ {
meta.ports.tcp.list = [ cfg.metrics.port ];
services.caddy = { services.caddy = {
enable = true; enable = true;
package = pkgs.caddy.withPlugins { package = pkgs.caddy.withPlugins {
@ -75,9 +81,15 @@ in
]; ];
hash = "sha256-117vurf98sK/4o3JU3rBwNBUjnZZyFRJ1mq5T1S1IxY="; hash = "sha256-117vurf98sK/4o3JU3rBwNBUjnZZyFRJ1mq5T1S1IxY=";
}; };
enableReload = false;
globalConfig = '' globalConfig = ''
admin off
metrics { per_host } metrics { per_host }
''; '';
virtualHosts.":${builtins.toString cfg.metrics.port}" = {
logFormat = "";
extraConfig = "metrics /metrics";
};
}; };
custom.persist.directories = [ "/var/lib/caddy" ]; custom.persist.directories = [ "/var/lib/caddy" ];