diffu/modules/nixos/prometheus/caddy.nix

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{ config, lib, ... }:
let
cfg = config.custom.prometheus;
in
{
config = lib.mkIf (cfg.enable && cfg.exporters.caddy.enable) {
services.caddy.globalConfig = lib.mkIf cfg.exporters.caddy.enable ''
servers {
metrics
}
'';
services.prometheus.scrapeConfigs = [
{
job_name = "caddy";
static_configs = [
{ targets = [ "127.0.0.1:2019" ]; }
];
}
];
custom.prometheus.ruleModules = [
{
name = "caddy_alerts";
rules = [
{
alert = "UpstreamHealthy";
expr = "caddy_reverse_proxy_upstreams_healthy != 1";
for = "5m";
labels = { severity = "critical"; };
annotations = { summary = "Upstream {{ $labels.unstream }} not healthy"; };
}
];
}
];
};
}