more

1 files changed, 23 insertions, 0 deletions

diff --git a/src/systemd-nspawn/systemd-nspawn.tmpfiles b/src/systemd-nspawn/systemd-nspawn.tmpfiles
new file mode 100644
index 0000000000..9fa3878d6b
--- /dev/null
+++ b/src/systemd-nspawn/systemd-nspawn.tmpfiles
@@ -0,0 +1,23 @@
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+
+# See tmpfiles.d(5) for details
+
+Q /var/lib/machines 0700 - - -
+
+# Remove old temporary snapshots, but only at boot. Ideally we'd have
+# "self-destroying" btrfs snapshots that go away if the last last
+# reference to it does. To mimic a scheme like this at least remove
+# the old snapshots on fresh boots, where we know they cannot be
+# referenced anymore. Note that we actually remove all temporary files
+# in /var/lib/machines/ at boot, which should be safe since the
+# directory has defined semantics. In the root directory (where
+# systemd-nspawn --ephemeral places snapshots) we are more strict, to
+# avoid removing unrelated temporary files.
+
+R! /var/lib/machines/.#*
+R! /.#machine.*