diff --git a/hooks/update-lxc-configs b/hooks/update-lxc-configs
new file mode 100755
index 0000000..5585505
--- /dev/null
+++ b/hooks/update-lxc-configs
@@ -0,0 +1,21 @@
+#!/usr/bin/env ruby
+require "pathname"
+require_relative "lib/lxc"
+
+LXC_CONTAINER_ROOT = Pathname.new("/data/containers")
+
+registry = Lxc::Registry.new
+network = registry.data["network"] || {}
+network.each do |name, container|
+  next if container["lxc"] == false
+  container = Lxc::Container.new(registry.data,
+                                 name: name,
+                                 ipv4: container["ipv4"],
+                                 ipv6: container["ipv6"],
+                                 rootfs: LXC_CONTAINER_ROOT.join(name, "rootfs"),
+                                 dn42_ipv4: container["dn42_ipv4"],
+                                 dn42_ipv6: container["dn42_ipv6"],
+                                 group: container["group"],
+                                 vars: container["vars"])
+  container.write_config(LXC_CONTAINER_ROOT.join(name, "config"))
+end