Return Customer's Quota Usage through Admin API

Modified the used limits API for Admin to retrieve
the used limits for a customer. Changes done to the
nova client to fetch limits for a given tenant.

This is related to changes made in nova,
https://review.openstack.org/#/c/27468/

Change-Id: Id53576eb35d6dab7cb655f8427091e95a6f75a6d
Implements: blueprint customer-quota-through-admin-api

novaclient/tests/v1_1/test_limits.py

@@ -14,6 +14,11 @@ class LimitsTest(utils.TestCase):
         cs.assert_called('GET', '/limits')
         self.assertTrue(isinstance(obj, limits.Limits))
 
+    def test_get_limits_for_a_tenant(self):
+        obj = cs.limits.get(tenant_id=1234)
+        cs.assert_called('GET', '/limits?tenant_id=1234')
+        self.assertTrue(isinstance(obj, limits.Limits))
+
     def test_absolute_limits(self):
         obj = cs.limits.get()
 
@@ -42,6 +47,7 @@ class LimitsTest(utils.TestCase):
             limits.AbsoluteLimit("maxPersonalitySize", 10240),
         )
 
+        cs.assert_called('GET', '/limits?reserved=1')
         abs_limits = list(obj.absolute)
         self.assertEqual(len(abs_limits), len(expected))
 

novaclient/tests/v1_1/test_shell.py

@@ -1298,6 +1298,9 @@ class ShellTest(utils.TestCase):
         self.run_command('absolute-limits --reserved')
         self.assert_called('GET', '/limits?reserved=1')
 
+        self.run_command('absolute-limits --tenant 1234')
+        self.assert_called('GET', '/limits?tenant_id=1234')
+
     def test_evacuate(self):
         self.run_command('evacuate sample-server new_host')
         self.assert_called('POST', '/servers/1234/action',

novaclient/v1_1/limits.py

@@ -1,5 +1,7 @@
 # Copyright 2011 OpenStack Foundation
 
+import urllib
+
 from novaclient import base
 
 
@@ -70,12 +72,17 @@ class LimitsManager(base.Manager):
 
     resource_class = Limits
 
-    def get(self, reserved=False):
+    def get(self, reserved=False, tenant_id=None):
         """
         Get a specific extension.
 
         :rtype: :class:`Limits`
         """
-        query_string = "?reserved=1" if reserved else ""
+        opts = {}
+        if reserved:
+            opts['reserved'] = 1
+        if tenant_id:
+            opts['tenant_id'] = tenant_id
+        query_string = "?%s" % urllib.urlencode(opts) if opts else ""
 
         return self._get("/limits%s" % query_string, "limits")

novaclient/v1_1/shell.py

@@ -2178,6 +2178,12 @@ def do_keypair_show(cs, args):
     _print_keypair(keypair)
 
 
+@utils.arg('--tenant',
+           #nova db searches by project_id
+           dest='tenant',
+           metavar='<tenant>',
+           nargs='?',
+           help='Display information from single tenant (Admin only).')
 @utils.arg('--reserved',
            dest='reserved',
            action='store_true',
@@ -2185,7 +2191,7 @@ def do_keypair_show(cs, args):
            help='Include reservations count.')
 def do_absolute_limits(cs, args):
     """Print a list of absolute limits for a user"""
-    limits = cs.limits.get(args.reserved).absolute
+    limits = cs.limits.get(args.reserved, args.tenant).absolute
     columns = ['Name', 'Value']
     utils.print_list(limits, columns)