Support for passing CA certificate in Ironic Glance Communication

Currently Ironic doesn't pass any certificate down for verifying
https connections in glance. New ironic config parameter
'glance_cafile' is added to [glance] section in ironic.conf to
pass the certificate down for https connection in glance.

Change-Id: I29e134d70addb16cd65dbd9c8038a23e76a57016

etc/ironic/ironic.conf.sample

@@ -1096,6 +1096,11 @@
 # Possible values: keystone, noauth
 #auth_strategy=keystone
 
+# Optional path to a CA certificate bundle to be used to
+# validate the SSL certificate served by glance. It is used
+# when glance_api_insecure is set to False. (string value)
+#glance_cafile=<None>
+
 
 [iboot]
 

ironic/common/glance_service/base_image_service.py

@@ -80,6 +80,9 @@ def check_image_service(func):
             scheme = 'http'
         params = {}
         params['insecure'] = CONF.glance.glance_api_insecure
+        if (not params['insecure'] and CONF.glance.glance_cafile
+                and use_ssl):
+            params['cacert'] = CONF.glance.glance_cafile
         if CONF.glance.auth_strategy == 'keystone':
             params['token'] = self.context.auth_token
         endpoint = '%s://%s:%s' % (scheme, self.glance_host, self.glance_port)

ironic/common/image_service.py

@@ -71,6 +71,10 @@ glance_opts = [
                choices=['keystone', 'noauth'],
                help=_('Authentication strategy to use when connecting to '
                       'glance.')),
+    cfg.StrOpt('glance_cafile',
+               help=_('Optional path to a CA certificate bundle to be used to '
+                      'validate the SSL certificate served by glance. It is '
+                      'used when glance_api_insecure is set to False.')),
 ]
 
 CONF.register_opts(glance_opts, group='glance')

ironic/tests/unit/common/test_glance_service.py

@@ -627,7 +627,8 @@ class TestGlanceImageService(base.TestCase):
                'token': self.context.auth_token})
 
     @mock.patch.object(glance_client, 'Client', autospec=True)
-    def test_get_image_service__no_client_set_https(self, mock_gclient):
+    def test_get_image_service__no_client_set_https_insecure(self,
+                                                             mock_gclient):
         def func(service, *args, **kwargs):
             return (self.endpoint, args, kwargs)
 
@@ -637,6 +638,7 @@ class TestGlanceImageService(base.TestCase):
 
         params = {'image_href': '%s/image_uuid' % endpoint}
         self.config(auth_strategy='keystone', group='glance')
+        self.config(glance_api_insecure=True, group='glance')
         wrapped_func = base_image_service.check_image_service(func)
 
         self.assertEqual((endpoint, (), params),
@@ -646,6 +648,29 @@ class TestGlanceImageService(base.TestCase):
             **{'insecure': CONF.glance.glance_api_insecure,
                'token': self.context.auth_token})
 
+    @mock.patch.object(glance_client, 'Client', autospec=True)
+    def test_get_image_service__no_client_set_https_secure(self, mock_gclient):
+        def func(service, *args, **kwargs):
+            return (self.endpoint, args, kwargs)
+
+        endpoint = 'https://123.123.123.123:9292'
+        mock_gclient.return_value.endpoint = endpoint
+        self.service.client = None
+
+        params = {'image_href': '%s/image_uuid' % endpoint}
+        self.config(auth_strategy='keystone', group='glance')
+        self.config(glance_api_insecure=False, group='glance')
+        self.config(glance_cafile='/path/to/certfile', group='glance')
+        wrapped_func = base_image_service.check_image_service(func)
+
+        self.assertEqual((endpoint, (), params),
+                         wrapped_func(self.service, **params))
+        mock_gclient.assert_called_once_with(
+            1, endpoint,
+            **{'cacert': CONF.glance.glance_cafile,
+               'insecure': CONF.glance.glance_api_insecure,
+               'token': self.context.auth_token})
+
 
 def _create_failing_glance_client(info):
     class MyGlanceStubClient(stubs.StubGlanceClient):

releasenotes/notes/bug-1548086-ed88646061b88faf.yaml

@@ -0,0 +1,9 @@
+---
+features:
+  - Adds support to pass a optional CA certificate using [glance]glance_cafile
+    configuration option to validate the SSL certificate served by glance for
+    secured https communication between Glance and Ironic.
+upgrade:
+  - Adds a [glance]glance_cafile configuration option to pass a optional
+    certificate for secured https communication. It is used  when
+    [glance]glance_api_insecure configuration option is set to False.