From 20fc4c8f9614959cf17f5da918d23892fe435f4a Mon Sep 17 00:00:00 2001
From: Yureka <yuka@yuka.dev>
Date: Mon, 5 Aug 2024 07:17:45 +0200
Subject: [PATCH] builders: move provisioning of ssh hostkeys to a systemd
 service

at first activation it does not yet have a working network setup
---
 services/baremetal-builder/netboot.nix | 29 +++++++++++++-------------
 1 file changed, 14 insertions(+), 15 deletions(-)

diff --git a/services/baremetal-builder/netboot.nix b/services/baremetal-builder/netboot.nix
index 16705e3..bd5af0d 100644
--- a/services/baremetal-builder/netboot.nix
+++ b/services/baremetal-builder/netboot.nix
@@ -5,22 +5,21 @@ in
 {
   config = lib.mkIf (cfg.enable && cfg.netboot) {
 
-    system.activationScripts.agenixInstall.deps = ["provisionSshHostKey"];
-    system.activationScripts.provisionSshHostKey = {
-      text = ''
-        echo provisioning ssh hostkey
-        if [ ! -f /etc/ssh/ssh_host_ed25519_key ]
-        then
-          mkdir -p /etc/ssh
-          (
-            umask 0077
-            curl --local-port 25-1024 https://vpn-gw.wob01.infra.forkos.org/${config.networking.hostName}/ssh_host_ed25519_key > /etc/ssh/ssh_host_ed25519_key
-          )
-        fi
+    systemd.services.openssh.after = [ "provision-ssh-hostkey" ];
+    systemd.services.provision-ssh-hostkey = {
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        Type = "oneshot";
+        RemainAfterExit = true;
+      };
+      script = ''
+        mkdir -p /etc/ssh
+        umask 0077
+        until ${pkgs.iputils}/bin/ping -c 1 vpn-gw.wob01.infra.forkos.org; do sleep 1; done
+        curl --local-port 25-1024 https://vpn-gw.wob01.infra.forkos.org/${config.networking.hostName}/ssh_host_ed25519_key > /etc/ssh/ssh_host_ed25519_key
+        # Run the activation script again to trigger agenix decryption
+        /run/current-system/activate
       '';
-      deps = [
-        "specialfs"
-      ];
     };
 
     system.build = {