From 393dfbf65145fcac6f2a8098221e91b4f2a5186b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Nasiadka?= <mnasiadka@gmail.com>
Date: Mon, 20 Sep 2021 12:04:25 +0200
Subject: [PATCH] docs: ceph: add copy-on-write for Glance

Change-Id: I51e2b62f563e66b6bb919621272662f3f8721eb2
---
 .../reference/storage/external-ceph-guide.rst      | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/doc/source/reference/storage/external-ceph-guide.rst b/doc/source/reference/storage/external-ceph-guide.rst
index 87e085856e..23ef01d567 100644
--- a/doc/source/reference/storage/external-ceph-guide.rst
+++ b/doc/source/reference/storage/external-ceph-guide.rst
@@ -63,6 +63,20 @@ for Ceph includes the following steps:
 
 #. Copy Ceph keyring to ``/etc/kolla/config/glance/<ceph_glance_keyring>``
 
+#. For copy-on-write set following in ``/etc/kolla/config/glance.conf``:
+
+   .. path /etc/kolla/config/glance.conf
+   .. code-block:: ini
+
+      [GLOBAL]
+      show_image_direct_url = True
+
+.. warning::
+
+    ``show_image_direct_url`` can present a security risk if using more
+    than just Ceph as Glance backend(s). Please see
+    :glance-doc:`Glance show_image_direct_url <configuration/glance_api.html#DEFAULT.show_image_direct_url>`
+
 Cinder
 ------