From 378006f0f2ed6fd60642e71b1c8ae4649575ed99 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Wed, 28 Jan 2015 16:12:05 +0100
Subject: [PATCH] Restrict the length of container names

---
 nixos/modules/virtualisation/nixos-container.pl | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/nixos/modules/virtualisation/nixos-container.pl b/nixos/modules/virtualisation/nixos-container.pl
index 9ae5331786c..94edfb37948 100644
--- a/nixos/modules/virtualisation/nixos-container.pl
+++ b/nixos/modules/virtualisation/nixos-container.pl
@@ -104,6 +104,10 @@ if ($action eq "create") {
 
     die "$0: container ‘$containerName’ already exists\n" if -e $confFile;
 
+    # Due to interface name length restrictions, container names must
+    # be restricted too.
+    die "$0: container name ‘$containerName’ is too long\n" if length $containerName > 11;
+
     # Get an unused IP address.
     my %usedIPs;
     foreach my $confFile2 (glob "/etc/containers/*.conf") {