From 35060ca71128300658cb8dd0a0009b448f23451b Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Sun, 30 May 2021 10:36:27 +0200
Subject: surtr: sync time from kvm

---
 hosts/surtr/default.nix | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/hosts/surtr/default.nix b/hosts/surtr/default.nix
index 34304b44..2d56f6e3 100644
--- a/hosts/surtr/default.nix
+++ b/hosts/surtr/default.nix
@@ -28,6 +28,8 @@
         enableUnstable = true;
         devNodes = "/dev"; # /dev/vda2 does not show up in /dev/disk/by-id
       };
+
+      kernelModules = ["ptp_kvm"];
     };
 
     fileSystems = {
@@ -79,6 +81,15 @@
       DNS = [ "46.38.225.230" "46.38.252.230" "2a03:4000:0:1::e1e6" "2a03:4000:8000::fce6" ];
     };
 
+    services.timesyncd.enable = false;
+    services.chrony = {
+      enable = true;
+      servers = [];
+      extraConfig = ''
+        refclock PHC /dev/ptp_kvm poll 3 dpoll -2 offset 0
+      '';
+    };
+
     services.openssh = {
       enable = true;
       passwordAuthentication = false;
-- 
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