docker.userguide: Fix ansible-playbook instruction for non-root user

Now using 'sudo -H' instead raw sudo - without that option ansible
on some systems(e.g. Ubuntu 16.04) will try to use regular user home
directory for caching (it may be not accessible when home is
mounted using Network File System)

Change-Id: I9d7e14613d7e27f86c43926c05b368972527e072
Signed-off-by: Radoslaw Jablonski <radoslawx.jablonski@intel.com>

diff --git a/docs/release/userguide/docker.userguide.rst b/docs/release/userguide/docker.userguide.rst
index 2b559f8..ed25d68 100644 (file)
--- a/docs/release/userguide/docker.userguide.rst
+++ b/docs/release/userguide/docker.userguide.rst
@@ -282,7 +282,7 @@ through more details.
 
 .. code:: bash
 
-    $ sudo ansible-playbook -i default.inv collectd_service.yml
+    $ sudo -H ansible-playbook -i default.inv collectd_service.yml
 
 Check the three containers are running, the output of docker ps should be similar to: