From 76a4a6ff36c73bb898124803fcfe376fc6a2fd6d Mon Sep 17 00:00:00 2001
From: Lorenzo Manacorda <lorenzo@mailbox.org>
Date: Mon, 26 Apr 2021 17:23:48 +0200
Subject: [PATCH] hosters/hetzner-dedicated: mdadm: ignore homehost

This is a safer way of ensuring there are no issues when auto-assembling
RAID arrays, since we skip the homehost validation altogether.
---
 .../hetzner-dedicated-wipe-and-install-nixos.sh           | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/hosters/hetzner-dedicated/hetzner-dedicated-wipe-and-install-nixos.sh b/hosters/hetzner-dedicated/hetzner-dedicated-wipe-and-install-nixos.sh
index 6e1f53f..27d2f6c 100644
--- a/hosters/hetzner-dedicated/hetzner-dedicated-wipe-and-install-nixos.sh
+++ b/hosters/hetzner-dedicated/hetzner-dedicated-wipe-and-install-nixos.sh
@@ -229,13 +229,11 @@ cat > /mnt/etc/nixos/configuration.nix <<EOF
   # This is mdadm's protection against accidentally putting a RAID disk
   # into the wrong machine and corrupting data by accidental sync, see
   # https://bugzilla.redhat.com/show_bug.cgi?id=606481#c14 and onward.
-  # We set the HOMEHOST manually go get the short '/dev/md' names,
-  # and so that things look and are configured the same on all such
-  # machines irrespective of host names.
   # We do not worry about plugging disks into the wrong machine because
-  # we will never exchange disks between machines.
+  # we will never exchange disks between machines, so we tell mdadm to
+  # ignore the homehost entirely.
   environment.etc."mdadm.conf".text = ''
-    HOMEHOST hetzner
+    HOMEHOST <ignore>
   '';
   # The RAIDs are assembled in stage1, so we need to make the config
   # available there.