Complete the change of adding public_endpoint option

Change-Id: I8190b102ab827a4cf4c23f0f350fae051c1d33f0
Signed-off-by: Zhi Yan Liu <zhiyanl@cn.ibm.com>

doc/source/configuring.rst

@@ -1331,3 +1331,15 @@ glance-registry service separately, by default they place at
 to make profiling work as designed operator needs to make those values of HMAC
 key be consistent for all services in your deployment. Without HMAC key the
 profiling will not be triggered even profiling feature is enabled.
+
+Configuring Glance public endpoint
+----------------------------------
+
+When Glance API service is ran dehind a proxy, operator probably need to
+configure a proper public endpoint to versions URL instead of use host owned
+which run service really. Glance allows configure a public endpoint URL to
+represent the proxy's URL.
+
+* ``public_endpoint=<None|URL>``
+
+Optional. Default: ``None``

etc/glance-api.conf

@@ -109,6 +109,13 @@ backlog = 4096
 # and 'store_type'.
 #location_strategy = location_order
 
+
+# Public url to use for versions endpoint. The default is None,
+# which will use the request's host_url attribute to populate the URL base.
+# If Glance is operating behind a proxy, you will want to change this to
+# represent the proxy's URL.
+#public_endpoint=<None>
+
 # ================= Syslog Options ============================
 
 # Send logs to syslog (/dev/log) instead of to file specified

glance/opts.py

@@ -25,6 +25,7 @@ import itertools
 
 import glance.api.middleware.context
 import glance.api.policy
+import glance.api.versions
 import glance.common.config
 import glance.common.location_strategy
 import glance.common.location_strategy.store_type
@@ -55,6 +56,7 @@ _api_opts = [
     (None, list(itertools.chain(*(_global_opt_lists + [
         glance.api.middleware.context.context_opts,
         glance.api.policy.policy_opts,
+        glance.api.versions.versions_opts,
         glance.common.config.common_opts,
         glance.common.location_strategy.location_strategy_opts,
         glance.common.property_utils.property_opts,

glance/tests/unit/test_opts.py

@@ -144,7 +144,8 @@ class OptsTestCase(utils.BaseTestCase):
             'eventlet_executor_pool_size',
             'store_type_preference',
             'flavor',
-            'config_file'
+            'config_file',
+            'public_endpoint'
         ]
 
         self._check_opt_groups(opt_list, expected_opt_groups)