openEuler 20.03 LTS SP2 support

openEuler is an open-source Linux based operating system. The current
openEuler kernel is based on Linux and supports multi arch, such as X86_64
and aarch64. It fully unleashes the potential of computing chips. As an
efficient, stable, and secure open-source OS built by global open-source
contributors, openEuler applies to database, big data, cloud computing,
and AI scenarios. openEuler is using RPM for package management.

Note:
Currently there is no available package for uwsgi-plugin-python3 and ovn, so that
openEuler needs manually install them from source.

Website: https://www.openeuler.org/en/

Change-Id: I169a0017998054604a63ac6c177d0f43f8a32ba6
Co-Authored-By: wangxiyuan <wangxiyuan1007@gmail.com>
Signed-off-by: Kevin Zhao <kevin.zhao@linaro.org>
diff --git a/doc/source/index.rst b/doc/source/index.rst
index 08ce4cb..feb50ce 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -38,7 +38,7 @@
 
 Start with a clean and minimal install of a Linux system. DevStack
 attempts to support the two latest LTS releases of Ubuntu, the
-latest/current Fedora version, CentOS/RHEL 8 and OpenSUSE.
+latest/current Fedora version, CentOS/RHEL 8, OpenSUSE and openEuler.
 
 If you do not have a preference, Ubuntu 20.04 (Focal Fossa) is the
 most tested, and will probably go the smoothest.