From b904a15186dec3da01cc5849a81cafb2c41b1e35 Mon Sep 17 00:00:00 2001
From: Luke Granger-Brown <hg@lukegb.com>
Date: Sun, 6 Aug 2023 18:02:28 +0100
Subject: [PATCH] nixos/bgp: on machines with lots of routes, disable
 SYSTEMD_RESOLVED_SYNTHESIZE_HOSTNAME

---
 ops/nixos/lib/bgp.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ops/nixos/lib/bgp.nix b/ops/nixos/lib/bgp.nix
index 71125a4f22..27f4be7b5e 100644
--- a/ops/nixos/lib/bgp.nix
+++ b/ops/nixos/lib/bgp.nix
@@ -418,5 +418,7 @@ in {
 
     services.tailscale.package = depot.nix.pkgs.tailscale;
     systemd.network.config.networkConfig.ManageForeignRoutes = "no";
+
+    systemd.services."systemd-resolved".environment.SYSTEMD_RESOLVED_SYNTHESIZE_HOSTNAME = "false";
   };
 }