Add command guide for openstack ping&health CLI

Change-Id: I36fc122324a7a8b53e546e00a94ab4d22e7c7550
Co-Authored-By: wangxiyuan<wangxiyuan@huawei.com>

doc/source/command-line.rst

@@ -16,3 +16,5 @@ Click the Link below for the details.
    command/claim
    command/pool
    command/flavor
+   command/ping
+   command/health

doc/source/command/health.rst

@@ -0,0 +1,25 @@
+Health
+======
+
+For help on a specific :command:`openstack messaging health` command, enter:
+
+.. code-block:: console
+
+   $ openstack messaging health COMMAND -h/--help
+
+The one command:
+
+.. code-block:: console
+
+      messaging health
+
+.. _openstack_messaging_health:
+
+openstack messaging health
+--------------------------
+
+.. code-block:: console
+
+   usage: openstack messaging health [-h]
+
+Display detailed health status of Zaqar server.

doc/source/command/ping.rst

@@ -0,0 +1,27 @@
+Ping
+====
+
+For help on a specific :command:`openstack messaging ping` command, enter:
+
+.. code-block:: console
+
+   $ openstack messaging ping COMMAND -h/--help
+
+The one command:
+
+.. code-block:: console
+
+      messaging ping
+
+.. _openstack_messaging_ping:
+
+openstack messaging ping
+------------------------
+
+.. code-block:: console
+
+   usage: openstack messaging ping [-h] [-f {json,shell,table,value,yaml}]
+                                   [-c COLUMN] [--max-width <integer>]
+                                   [--noindent] [--prefix PREFIX]
+
+Check if Zaqar server is alive or not.