From dd92c987b3bb7db6cb8717485f7a4da3308cf2c5 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Fri, 22 Oct 2021 14:05:42 +0200
Subject: [PATCH] nixos: services: ssh-server: persist host keys

---
 modules/nixos/services/ssh-server/default.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/modules/nixos/services/ssh-server/default.nix b/modules/nixos/services/ssh-server/default.nix
index 9ae0fa8..0cabc6f 100644
--- a/modules/nixos/services/ssh-server/default.nix
+++ b/modules/nixos/services/ssh-server/default.nix
@@ -20,6 +20,14 @@ in
       };
     };
 
+    # Persist SSH keys
+    my.system.persist.files = [
+      "/etc/ssh/ssh_host_ed25519_key"
+      "/etc/ssh/ssh_host_ed25519_key.pub"
+      "/etc/ssh/ssh_host_rsa_key"
+      "/etc/ssh/ssh_host_rsa_key.pub"
+    ];
+
     # Opens the relevant UDP ports.
     programs.mosh.enable = true;
   };