f02b380005
Where libvirt is creating the tap device e.g: OVS bridge (hybrid=False). os-vif will just ensure that the OVS bridge exists. We want libvirt to create the tap, configure the MTU and then plug the tap into the right bridge. - This change adds the mtu element to libvirt guest interface xml for vifs of type ethernet and bridge. - This change adds a libvirt version check to enable setting the interface mtu on hosts with libvirt 3.3.0+ Change-Id: Iecc265fb25e88fa00a66f1fd38e215cad53e7669 Partial-bug: #1747496
199 lines
6.5 KiB
Python
199 lines
6.5 KiB
Python
# Copyright (C) 2013 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Policy based configuration of libvirt objects
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This module provides helper APIs for populating the config.py
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classes based on common operational needs / policies
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"""
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from nova.pci import utils as pci_utils
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MIN_LIBVIRT_ETHERNET_SCRIPT_PATH_NONE = (1, 3, 3)
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def set_vif_guest_frontend_config(conf, mac, model, driver, queues,
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rx_queue_size):
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"""Populate a LibvirtConfigGuestInterface instance
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with guest frontend details.
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NOTE: @model, @driver, @queues and @rx_queue_size can be None.
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"""
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conf.mac_addr = mac
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if model is not None:
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conf.model = model
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if driver is not None:
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conf.driver_name = driver
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if queues is not None:
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conf.vhost_queues = queues
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if rx_queue_size:
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conf.vhost_rx_queue_size = rx_queue_size
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def set_vif_host_backend_ethernet_config(conf, tapname, host):
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"""Populate a LibvirtConfigGuestInterface instance
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with host backend details for an externally configured
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host device.
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NB use of this configuration is discouraged by
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libvirt project and will mark domains as 'tainted'.
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"""
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conf.net_type = "ethernet"
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conf.target_dev = tapname
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# NOTE(mriedem): Before libvirt 1.3.3, passing script=None results
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# in errors because /etc/qemu-ifup gets run which is blocked by
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# AppArmor. Passing script='' between libvirt 1.3.3 and 3.1 will also
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# result in errors. So we have to check the libvirt version and set
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# the script value accordingly. Libvirt 3.1 allows and properly handles
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# both None and '' as no-ops.
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if host.has_min_version(MIN_LIBVIRT_ETHERNET_SCRIPT_PATH_NONE):
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conf.script = None
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else:
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conf.script = ''
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def set_vif_host_backend_802qbg_config(conf, devname, managerid,
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typeid, typeidversion,
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instanceid, tapname=None):
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"""Populate a LibvirtConfigGuestInterface instance
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with host backend details for an 802.1qbg device.
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"""
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conf.net_type = "direct"
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conf.source_dev = devname
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conf.source_mode = "vepa"
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conf.vporttype = "802.1Qbg"
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conf.add_vport_param("managerid", managerid)
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conf.add_vport_param("typeid", typeid)
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conf.add_vport_param("typeidversion", typeidversion)
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conf.add_vport_param("instanceid", instanceid)
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if tapname:
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conf.target_dev = tapname
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def set_vif_host_backend_802qbh_config(conf, net_type, devname, profileid,
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tapname=None):
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"""Populate a LibvirtConfigGuestInterface instance
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with host backend details for an 802.1qbh device.
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"""
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conf.net_type = net_type
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if net_type == 'direct':
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conf.source_mode = 'passthrough'
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conf.source_dev = pci_utils.get_ifname_by_pci_address(devname)
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conf.driver_name = 'vhost'
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else:
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conf.source_dev = devname
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conf.model = None
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conf.vporttype = "802.1Qbh"
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conf.add_vport_param("profileid", profileid)
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if tapname:
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conf.target_dev = tapname
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def set_vif_host_backend_hw_veb(conf, net_type, devname, vlan,
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tapname=None):
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"""Populate a LibvirtConfigGuestInterface instance
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with host backend details for an device that supports hardware
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virtual ethernet bridge.
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"""
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conf.net_type = net_type
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conf.vlan = vlan
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if net_type == 'direct':
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conf.source_mode = 'passthrough'
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conf.source_dev = pci_utils.get_ifname_by_pci_address(devname)
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conf.driver_name = 'vhost'
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else: # net_type == network_model.VNIC_TYPE_DIRECT
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conf.source_dev = devname
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conf.model = None
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if tapname:
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conf.target_dev = tapname
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def set_vif_host_backend_hostdev_pci_config(conf, pci_slot):
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"""Populate a LibvirtConfigGuestHostdev instance with pci address data."""
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conf.domain, conf.bus, conf.slot, conf.function = (
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pci_utils.get_pci_address_fields(pci_slot))
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def set_vif_host_backend_direct_config(conf, devname, mode="passthrough"):
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"""Populate a LibvirtConfigGuestInterface instance
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with direct Interface.
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"""
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conf.net_type = "direct"
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conf.source_mode = mode
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conf.source_dev = devname
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conf.model = "virtio"
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def set_vif_host_backend_vhostuser_config(conf, mode, path, rx_queue_size,
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tx_queue_size):
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"""Populate a LibvirtConfigGuestInterface instance
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with host backend details for vhostuser socket.
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NOTE: @rx_queue_size and @tx_queue_size can be None
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"""
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conf.net_type = "vhostuser"
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conf.vhostuser_type = "unix"
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conf.vhostuser_mode = mode
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conf.vhostuser_path = path
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if rx_queue_size:
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conf.vhost_rx_queue_size = rx_queue_size
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if tx_queue_size:
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conf.vhost_tx_queue_size = tx_queue_size
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def set_vif_mtu_config(conf, mtu):
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"""Populate a LibvirtConfigGuestInterface instance
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with network mtu.
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"""
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conf.mtu = mtu
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def set_vif_bandwidth_config(conf, inst_type):
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"""Config vif inbound/outbound bandwidth limit. parameters are
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set in instance_type_extra_specs table, key is in the format
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quota:vif_inbound_average.
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"""
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bandwidth_items = ['vif_inbound_average', 'vif_inbound_peak',
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'vif_inbound_burst', 'vif_outbound_average', 'vif_outbound_peak',
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'vif_outbound_burst']
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for key, value in inst_type.get('extra_specs', {}).items():
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scope = key.split(':')
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if len(scope) > 1 and scope[0] == 'quota':
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if scope[1] in bandwidth_items:
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setattr(conf, scope[1], value)
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def set_numa_memnode(conf, guest_node_id, host_cell_id):
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"""Prepares numa memory node config for the guest.
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"""
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conf.cellid = guest_node_id
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conf.nodeset = [host_cell_id]
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conf.mode = "strict"
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def set_vcpu_realtime_scheduler(conf, vcpus_rt, priority):
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"""Prepares realtime config for the guest."""
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conf.vcpus = vcpus_rt
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conf.scheduler = "fifo"
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conf.priority = priority
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