From 2848c7e897f32433bd240f965f33f60d473a9a15 Mon Sep 17 00:00:00 2001
From: Simon Gardling <titaniumtown@proton.me>
Date: Tue, 7 Apr 2026 12:44:46 -0400
Subject: [PATCH] grafana: keep data forever

---
 services/grafana/prometheus.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/services/grafana/prometheus.nix b/services/grafana/prometheus.nix
index 4ac8bd5..680ca3d 100644
--- a/services/grafana/prometheus.nix
+++ b/services/grafana/prometheus.nix
@@ -21,7 +21,7 @@ in
     port = service_configs.ports.private.prometheus.port;
     listenAddress = "127.0.0.1";
     stateDir = "prometheus";
-    retentionTime = "90d";
+    retentionTime = "0d"; # 0 disables time-based retention (keep forever)
 
     exporters = {
       node = {