Fixes reboot (and rescue) to work even if libvirt doesn't know about the instance and the network doesn't exist.

nova/compute/manager.py

@@ -205,8 +205,8 @@ class ComputeManager(manager.Manager):
     def reboot_instance(self, context, instance_id):
         """Reboot an instance on this server."""
         context = context.elevated()
-        instance_ref = self.db.instance_get(context, instance_id)
         self._update_state(context, instance_id)
+        instance_ref = self.db.instance_get(context, instance_id)
 
         if instance_ref['state'] != power_state.RUNNING:
             logging.warn(_('trying to reboot a non-running '
@@ -220,6 +220,7 @@ class ComputeManager(manager.Manager):
                                    instance_id,
                                    power_state.NOSTATE,
                                    'rebooting')
+        self.network_manager.setup_compute_network(context, instance_id)
         self.driver.reboot(instance_ref)
         self._update_state(context, instance_id)
 
@@ -235,6 +236,7 @@ class ComputeManager(manager.Manager):
                                    instance_id,
                                    power_state.NOSTATE,
                                    'rescuing')
+        self.network_manager.setup_compute_network(context, instance_id)
         self.driver.rescue(instance_ref)
         self._update_state(context, instance_id)
 

nova/virt/libvirt.rescue.qemu.xml.template.THIS

@@ -1,38 +0,0 @@
-<domain type='%(type)s'>
-    <name>%(name)s</name>
-    <os>
-        <type>hvm</type>
-        <kernel>%(basepath)s/rescue-kernel</kernel>
-        <initrd>%(basepath)s/rescue-ramdisk</initrd>
-        <cmdline>root=/dev/vda1 console=ttyS0</cmdline>
-    </os>
-    <features>
-        <acpi/>
-    </features>
-    <memory>%(memory_kb)s</memory>
-    <vcpu>%(vcpus)s</vcpu>
-    <devices>
-        <disk type='file'>
-            <source file='%(basepath)s/rescue-disk'/>
-            <target dev='vda' bus='virtio'/>
-        </disk>
-        <disk type='file'>
-            <source file='%(basepath)s/disk'/>
-            <target dev='vdb' bus='virtio'/>
-        </disk>
-        <interface type='bridge'>
-            <source bridge='%(bridge_name)s'/>
-            <mac address='%(mac_address)s'/>
-            <!--   <model type='virtio'/>  CANT RUN virtio network right now -->
-            <filterref filter="nova-instance-%(name)s">
-                <parameter name="IP" value="%(ip_address)s" />
-                <parameter name="DHCPSERVER" value="%(dhcp_server)s" />
-                %(extra_params)s
-            </filterref>
-        </interface>
-        <serial type="file">
-            <source path='%(basepath)s/console.log'/>
-            <target port='1'/>
-        </serial>
-    </devices>
-</domain>

nova/virt/libvirt.rescue.uml.xml.template.THIS

@@ -1,31 +0,0 @@
-<domain type='%(type)s'>
-    <name>%(name)s</name>
-    <memory>%(memory_kb)s</memory>
-    <os>
-        <type>%(type)s</type>
-        <kernel>/usr/bin/linux</kernel>
-        <root>/dev/ubda1</root>
-    </os>
-    <devices>
-        <disk type='file'>
-            <source file='%(basepath)s/rescue-disk'/>
-            <target dev='ubd0' bus='uml'/>
-        </disk>
-        <disk type='file'>
-            <source file='%(basepath)s/disk'/>
-            <target dev='ubd1' bus='uml'/>
-        </disk>
-        <interface type='bridge'>
-            <source bridge='%(bridge_name)s'/>
-            <mac address='%(mac_address)s'/>
-            <filterref filter="nova-instance-%(name)s">
-                <parameter name="IP" value="%(ip_address)s" />
-                <parameter name="DHCPSERVER" value="%(dhcp_server)s" />
-                %(extra_params)s
-            </filterref>
-        </interface>
-        <console type="file">
-            <source path='%(basepath)s/console.log'/>
-        </console>
-    </devices>
-</domain>

nova/virt/libvirt_conn.py

@@ -192,7 +192,8 @@ class LibvirtConnection(object):
         #               everything has been vetted a bit
         def _wait_for_timer():
             timer_done.wait()
-            self._cleanup(instance)
+            if cleanup:
+                self._cleanup(instance)
             done.send()
 
         greenthread.spawn(_wait_for_timer)