[Kimchi-devel] [PATCH] issue #548: Hotplug network interfaces

Currently, network interfaces can only be added to shutoff VMs. However, the use might want to attach an interface to a running VM as well. Allow network interfaces to be attached also while the VM is running. The related test cases have been updated to perform the same operations on both a shutoff and a running VM. Fix issue #548 (Kimchi does not support NIC hot plug) - backend only. Signed-off-by: Crístian Deives <cristiandeives(a)gmail.com&gt; --- src/kimchi/i18n.py | 1 - src/kimchi/model/vmifaces.py | 45 ++++++++++++++--------- tests/test_model.py | 86 ++++++++++++++++++++++---------------------- 3 files changed, 73 insertions(+), 59 deletions(-) diff --git a/src/kimchi/i18n.py b/src/kimchi/i18n.py index 46990a5..d4c1cc6 100644 --- a/src/kimchi/i18n.py +++ b/src/kimchi/i18n.py @@ -118,7 +118,6 @@ messages = { "KCHVMIF0001E": _("Interface %(iface)s does not exist in virtual machine %(name)s"), "KCHVMIF0002E": _("Network %(network)s specified for virtual machine %(name)s does not exist"), - "KCHVMIF0003E": _("Do not support guest interface hot plug attachment"), "KCHVMIF0004E": _("Supported virtual machine interfaces type is only network"), "KCHVMIF0005E": _("Network name for virtual machine interface must be a string"), "KCHVMIF0006E": _("Invalid network model card specified for virtual machine interface"), diff --git a/src/kimchi/model/vmifaces.py b/src/kimchi/model/vmifaces.py index 0c10fa9..a64315d 100644 --- a/src/kimchi/model/vmifaces.py +++ b/src/kimchi/model/vmifaces.py @@ -22,7 +22,7 @@ import random import libvirt from lxml import etree, objectify -from kimchi.exception import InvalidOperation, InvalidParameter, NotFoundError +from kimchi.exception import InvalidParameter, NotFoundError from kimchi.model.config import CapabilitiesModel from kimchi.model.vms import DOM_STATE_MAP, VMModel from kimchi.xmlutils.interface import get_iface_xml @@ -48,10 +48,6 @@ class VMIfacesModel(object): raise InvalidParameter("KCHVMIF0002E", {'name': vm, 'network': params["network"]}) - dom = VMModel.get_vm(vm, self.conn) - if DOM_STATE_MAP[dom.info()[0]] != "shutoff": - raise InvalidOperation("KCHVMIF0003E") - macs = (iface.mac.get('address') for iface in self.get_vmifaces(vm, self.conn)) @@ -60,10 +56,19 @@ class VMIfacesModel(object): if params['mac'] not in macs: break + dom = VMModel.get_vm(vm, self.conn) + os_data = VMModel.vm_get_os_metadata(dom, self.caps.metadata_support) os_distro, os_version = os_data xml = get_iface_xml(params, conn.getInfo()[0], os_distro, os_version) - dom.attachDeviceFlags(xml, libvirt.VIR_DOMAIN_AFFECT_CURRENT) + + flags = 0 + if dom.isPersistent(): + flags |= libvirt.VIR_DOMAIN_AFFECT_CONFIG + if DOM_STATE_MAP[dom.info()[0]] != "shutoff": + flags |= libvirt.VIR_DOMAIN_AFFECT_LIVE + + dom.attachDeviceFlags(xml, flags) return params['mac'] @@ -118,14 +123,16 @@ class VMIfaceModel(object): dom = VMModel.get_vm(vm, self.conn) iface = self._get_vmiface(vm, mac) - if DOM_STATE_MAP[dom.info()[0]] != "shutoff": - raise InvalidOperation("KCHVMIF0003E") - if iface is None: raise NotFoundError("KCHVMIF0001E", {'name': vm, 'iface': mac}) - dom.detachDeviceFlags(etree.tostring(iface), - libvirt.VIR_DOMAIN_AFFECT_CURRENT) + flags = 0 + if dom.isPersistent(): + flags |= libvirt.VIR_DOMAIN_AFFECT_CONFIG + if DOM_STATE_MAP[dom.info()[0]] != "shutoff": + flags |= libvirt.VIR_DOMAIN_AFFECT_LIVE + + dom.detachDeviceFlags(etree.tostring(iface), flags) def update(self, vm, mac, params): dom = VMModel.get_vm(vm, self.conn) @@ -134,16 +141,22 @@ class VMIfaceModel(object): if iface is None: raise NotFoundError("KCHVMIF0001E", {'name': vm, 'iface': mac}) - # FIXME we will support to change the live VM configuration later. + flags = 0 + if dom.isPersistent(): + flags |= libvirt.VIR_DOMAIN_AFFECT_CONFIG + if DOM_STATE_MAP[dom.info()[0]] != "shutoff": + flags |= libvirt.VIR_DOMAIN_AFFECT_LIVE + if iface.attrib['type'] == 'network' and 'network' in params: iface.source.attrib['network'] = params['network'] xml = etree.tostring(iface) - dom.updateDeviceFlags(xml, flags=libvirt.VIR_DOMAIN_AFFECT_CONFIG) - # change on the persisted VM configuration only. - if 'model' in params and dom.isPersistent(): + dom.updateDeviceFlags(xml, flags=flags) + + if 'model' in params: iface.model.attrib["type"] = params['model'] xml = etree.tostring(iface) - dom.updateDeviceFlags(xml, flags=libvirt.VIR_DOMAIN_AFFECT_CONFIG) + + dom.updateDeviceFlags(xml, flags=flags) return mac diff --git a/tests/test_model.py b/tests/test_model.py index 63bd721..39e4fe6 100644 --- a/tests/test_model.py +++ b/tests/test_model.py @@ -297,9 +297,6 @@ class ModelTests(unittest.TestCase): params = {'name': 'test', 'disks': [], 'cdrom': UBUNTU_ISO} inst.templates_create(params) rollback.prependDefer(inst.template_delete, 'test') - params = {'name': 'kimchi-ifaces', 'template': '/templates/test'} - inst.vms_create(params) - rollback.prependDefer(inst.vm_delete, 'kimchi-ifaces') # Create a network net_name = 'test-network' @@ -311,45 +308,50 @@ class ModelTests(unittest.TestCase): inst.network_activate(net_name) rollback.prependDefer(inst.network_deactivate, net_name) - ifaces = inst.vmifaces_get_list('kimchi-ifaces') - self.assertEquals(1, len(ifaces)) - - iface = inst.vmiface_lookup('kimchi-ifaces', ifaces[0]) - self.assertEquals(17, len(iface['mac'])) - self.assertEquals("default", iface['network']) - self.assertIn("model", iface) - - # attach network interface to vm - iface_args = {"type": "network", - "network": "test-network", - "model": "virtio"} - mac = inst.vmifaces_create('kimchi-ifaces', iface_args) - # detach network interface from vm - rollback.prependDefer(inst.vmiface_delete, 'kimchi-ifaces', mac) - self.assertEquals(17, len(mac)) - - iface = inst.vmiface_lookup('kimchi-ifaces', mac) - self.assertEquals("network", iface["type"]) - self.assertEquals("test-network", iface['network']) - self.assertEquals("virtio", iface["model"]) - - # attach network interface to vm without providing model - iface_args = {"type": "network", - "network": "test-network"} - mac = inst.vmifaces_create('kimchi-ifaces', iface_args) - rollback.prependDefer(inst.vmiface_delete, 'kimchi-ifaces', mac) - - iface = inst.vmiface_lookup('kimchi-ifaces', mac) - self.assertEquals("network", iface["type"]) - self.assertEquals("test-network", iface['network']) - - # update vm interface - iface_args = {"network": "default", - "model": "e1000"} - inst.vmiface_update('kimchi-ifaces', mac, iface_args) - iface = inst.vmiface_lookup('kimchi-ifaces', mac) - self.assertEquals("default", iface['network']) - self.assertEquals("e1000", iface["model"]) + for vm_name in ['kimchi-ifaces', 'kimchi-ifaces-running']: + params = {'name': vm_name, 'template': '/templates/test'} + inst.vms_create(params) + rollback.prependDefer(inst.vm_delete, vm_name) + + ifaces = inst.vmifaces_get_list(vm_name) + self.assertEquals(1, len(ifaces)) + + iface = inst.vmiface_lookup(vm_name, ifaces[0]) + self.assertEquals(17, len(iface['mac'])) + self.assertEquals("default", iface['network']) + self.assertIn("model", iface) + + # attach network interface to vm + iface_args = {"type": "network", + "network": "test-network", + "model": "virtio"} + mac = inst.vmifaces_create(vm_name, iface_args) + # detach network interface from vm + rollback.prependDefer(inst.vmiface_delete, vm_name, mac) + self.assertEquals(17, len(mac)) + + iface = inst.vmiface_lookup(vm_name, mac) + self.assertEquals("network", iface["type"]) + self.assertEquals("test-network", iface['network']) + self.assertEquals("virtio", iface["model"]) + + # attach network interface to vm without providing model + iface_args = {"type": "network", + "network": "test-network"} + mac = inst.vmifaces_create(vm_name, iface_args) + rollback.prependDefer(inst.vmiface_delete, vm_name, mac) + + iface = inst.vmiface_lookup(vm_name, mac) + self.assertEquals("network", iface["type"]) + self.assertEquals("test-network", iface['network']) + + # update vm interface + iface_args = {"network": "default", + "model": "e1000"} + inst.vmiface_update(vm_name, mac, iface_args) + iface = inst.vmiface_lookup(vm_name, mac) + self.assertEquals("default", iface['network']) + self.assertEquals("e1000", iface["model"]) @unittest.skipUnless(utils.running_as_root(), 'Must be run as root') def test_vm_disk(self): -- 2.1.0