From 17868092616f868cfa7bfe0f1ae09bf3ccf1111c Mon Sep 17 00:00:00 2001
From: Chuck Short <chuck.short@canonical.com>
Date: Mon, 12 Sep 2016 14:25:16 -0700
Subject: [PATCH] Enable user namespace for ext4

Enable user namespace for ext4 when cinder is detected.
This is done so that the block devices can actually be
used in the container.

Change-Id: I3f6793e5e47597c83cd0e001e5f1b6c2081d6654
Signed-off-by: Chuck Short <chuck.short@canonical.com>
---
 devstack/plugin.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/devstack/plugin.sh b/devstack/plugin.sh
index 4a01f340..e3ed9b4f 100755
--- a/devstack/plugin.sh
+++ b/devstack/plugin.sh
@@ -69,6 +69,11 @@ function init_nova-lxd() {
        iniset $TEMPEST_CONFIG validation image_ssh_user ubuntu
        iniset $TEMPEST_CONFIG validation run_validation True
     fi
+
+    if is_service_enabled cinder; then
+       # Enable user namespace for ext4, this has only been tested on xenial+
+       echo Y | sudo tee /sys/module/ext4/parameters/userns_mounts
+    fi
 }
 
 function shutdown_nova-lxd() {