From a070eb6152644574a3fc7f98a8b6c00a0b4502f7 Mon Sep 17 00:00:00 2001
From: dawn <90008@klbr.net>
Date: Fri, 28 Aug 2026 03:49:55 +0900
Subject: [PATCH] prometheus: bound TSDB retention

Signed-off-by: dawn <dawn@tangled.org>
---
 hosts/prometheus-hel/services/prometheus.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/hosts/prometheus-hel/services/prometheus.nix b/hosts/prometheus-hel/services/prometheus.nix
index 35daedb..6bbd135 100644
--- a/hosts/prometheus-hel/services/prometheus.nix
+++ b/hosts/prometheus-hel/services/prometheus.nix
@@ -102,7 +102,11 @@ in {
   services.prometheus = {
     enable = true;
     # spindle attaches trace ids as exemplars to its latency histograms
-    extraFlags = ["--enable-feature=exemplar-storage"];
+    retentionTime = "7d";
+    extraFlags = [
+      "--enable-feature=exemplar-storage"
+      "--storage.tsdb.retention.size=35GB"
+    ];
     globalConfig.scrape_interval = "15s";
     scrapeConfigs = [
       {
-- 
2.51.2