Introduce a class for storing libvirt snapshot configuration

Extend the libvirt config APIs to include a new class
LibvirtConfigGuestSnapshot for storing information about
guest snapshots

blueprint libvirt-xml-config-apis
Change-Id: Icc54f6f5cf41b05d904659e0a337bddb4bef5733
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

2 files changed, 28 insertions, 0 deletions

diff --git a/nova/tests/test_libvirt_config.py b/nova/tests/test_libvirt_config.py
index 8d6ede1be..b910849a5 100644
--- a/nova/tests/test_libvirt_config.py
+++ b/nova/tests/test_libvirt_config.py
@@ -398,3 +398,16 @@ class LibvirtConfigCPUTest(LibvirtConfigBaseTest):
               <vendor>AMD</vendor>
               <topology cores="4" threads="2" sockets="2"/>
             </cpu>""")
+
+
+class LibvirtConfigGuestSnapshotTest(LibvirtConfigBaseTest):
+
+    def test_config_snapshot(self):
+        obj = config.LibvirtConfigGuestSnapshot()
+        obj.name = "Demo"
+
+        xml = obj.to_xml()
+        self.assertXmlEqual(xml, """
+            <domainsnapshot>
+              <name>Demo</name>
+            </domainsnapshot>""")
diff --git a/nova/virt/libvirt/config.py b/nova/virt/libvirt/config.py
index e4f99a7ba..63499eaf8 100644
--- a/nova/virt/libvirt/config.py
+++ b/nova/virt/libvirt/config.py
@@ -396,3 +396,18 @@ class LibvirtConfigCPU(LibvirtConfigObject):
                                      name=f))
 
         return cpu
+
+
+class LibvirtConfigGuestSnapshot(LibvirtConfigObject):
+
+    def __init__(self, **kwargs):
+        super(LibvirtConfigGuestSnapshot, self).__init__(
+            root_name="domainsnapshot",
+            **kwargs)
+
+        self.name = None
+
+    def format_dom(self):
+        ss = super(LibvirtConfigGuestSnapshot, self).format_dom()
+        ss.append(self._text_node("name", self.name))
+        return ss