Merge "Log xml in libvirt _create_domain failures"

nova/tests/virt/libvirt/test_libvirt.py

@@ -44,6 +44,7 @@ from nova.openstack.common import fileutils
 from nova.openstack.common import importutils
 from nova.openstack.common import jsonutils
 from nova.openstack.common import loopingcall
+from nova.openstack.common import processutils
 from nova.openstack.common import uuidutils
 from nova import test
 from nova.tests import fake_network
@@ -4022,6 +4023,88 @@ class LibvirtConnTestCase(test.TestCase):
         self.mox.ReplayAll()
         self.assertTrue(conn._is_storage_shared_with('foo', '/path'))
 
+    def test_create_domain_define_xml_fails(self):
+        """
+        Tests that the xml is logged when defining the domain fails.
+        """
+        fake_xml = "<test>this is a test</test>"
+
+        def fake_defineXML(xml):
+            self.assertEquals(fake_xml, xml)
+            raise libvirt.libvirtError('virDomainDefineXML() failed')
+
+        self.log_error_called = False
+
+        def fake_error(msg):
+            self.log_error_called = True
+            self.assertTrue(fake_xml in msg)
+
+        self.stubs.Set(nova.virt.libvirt.driver.LOG, 'error', fake_error)
+
+        self.create_fake_libvirt_mock(defineXML=fake_defineXML)
+        self.mox.ReplayAll()
+        conn = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), True)
+
+        self.assertRaises(libvirt.libvirtError, conn._create_domain, fake_xml)
+        self.assertTrue(self.log_error_called)
+
+    def test_create_domain_with_flags_fails(self):
+        """
+        Tests that the xml is logged when creating the domain with flags fails.
+        """
+        fake_xml = "<test>this is a test</test>"
+        fake_domain = FakeVirtDomain(fake_xml)
+
+        def fake_createWithFlags(launch_flags):
+            raise libvirt.libvirtError('virDomainCreateWithFlags() failed')
+
+        self.log_error_called = False
+
+        def fake_error(msg):
+            self.log_error_called = True
+            self.assertTrue(fake_xml in msg)
+
+        self.stubs.Set(fake_domain, 'createWithFlags', fake_createWithFlags)
+        self.stubs.Set(nova.virt.libvirt.driver.LOG, 'error', fake_error)
+
+        self.create_fake_libvirt_mock()
+        self.mox.ReplayAll()
+        conn = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), True)
+
+        self.assertRaises(libvirt.libvirtError, conn._create_domain,
+                          domain=fake_domain)
+        self.assertTrue(self.log_error_called)
+
+    def test_create_domain_enable_hairpin_fails(self):
+        """
+        Tests that the xml is logged when enabling hairpin mode for the domain
+        fails.
+        """
+        fake_xml = "<test>this is a test</test>"
+        fake_domain = FakeVirtDomain(fake_xml)
+
+        def fake_enable_hairpin(launch_flags):
+            raise processutils.ProcessExecutionError('error')
+
+        self.log_error_called = False
+
+        def fake_error(msg):
+            self.log_error_called = True
+            self.assertTrue(fake_xml in msg)
+
+        self.stubs.Set(nova.virt.libvirt.driver.LOG, 'error', fake_error)
+
+        self.create_fake_libvirt_mock()
+        self.mox.ReplayAll()
+        conn = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), True)
+        self.stubs.Set(conn, '_enable_hairpin', fake_enable_hairpin)
+
+        self.assertRaises(processutils.ProcessExecutionError,
+                          conn._create_domain,
+                          domain=fake_domain,
+                          power_on=False)
+        self.assertTrue(self.log_error_called)
+
 
 class HostStateTestCase(test.TestCase):
 

nova/virt/libvirt/driver.py

@@ -2506,10 +2506,28 @@ class LibvirtDriver(driver.ComputeDriver):
                                  use_cow=CONF.use_cow_images)
 
         if xml:
+            try:
                 domain = self._conn.defineXML(xml)
+            except Exception as e:
+                LOG.error(_("An error occurred while trying to define a domain"
+                            " with xml: %s") % xml)
+                raise e
+
         if power_on:
+            try:
                 domain.createWithFlags(launch_flags)
+            except Exception as e:
+                with excutils.save_and_reraise_exception():
+                    LOG.error(_("An error occurred while trying to launch a "
+                                "defined domain with xml: %s") %
+                              domain.XMLDesc(0))
+
+        try:
             self._enable_hairpin(domain.XMLDesc(0))
+        except Exception:
+            with excutils.save_and_reraise_exception():
+                LOG.error(_("An error occurred while enabling hairpin mode on "
+                            "domain with xml: %s") % domain.XMLDesc(0))
 
         # NOTE(uni): Now the container is running with its own private mount
         # namespace and so there is no need to keep the container rootfs