2 # Copyright 2018 Cisco Systems, Inc. All rights reserved.
4 # Licensed under the Apache License, Version 2.0 (the "License"); you may
5 # not use this file except in compliance with the License. You may obtain
6 # a copy of the License at
8 # http://www.apache.org/licenses/LICENSE-2.0
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 # License for the specific language governing permissions and limitations
17 # This module takes care of chaining networks, ports and vms
19 """NFVBENCH CHAIN DISCOVERY/STAGING.
21 This module takes care of staging/discovering all resources that are participating in a
22 benchmarking session: flavors, networks, ports, VNF instances.
23 If a resource is discovered with the same name, it will be reused.
24 Otherwise it will be created.
26 ChainManager: manages VM image, flavor, the staging discovery of all chains
28 Chain: manages one chain, has 2 or more networks and 1 or more instances
29 ChainNetwork: manages 1 network in a chain
30 ChainVnf: manages 1 VNF instance in a chain, has 2 ports
31 ChainVnfPort: manages 1 instance port
33 ChainManager-->Chain(*)
34 Chain-->ChainNetwork(*),ChainVnf(*)
35 ChainVnf-->ChainVnfPort(2)
37 Once created/discovered, instances are checked to be in the active state (ready to pass traffic)
38 Configuration parameters that will influence how these resources are staged/related:
39 - openstack or no openstack
42 - number of VNF in each chain (PVP, PVVP)
43 - SRIOV and middle port SRIOV for port types
44 - whether networks are shared across chains or not
46 There is not traffic generation involved in this module.
53 from neutronclient.neutron import client as neutronclient
54 from novaclient.client import Client
56 from attrdict import AttrDict
59 from specs import ChainType
61 # Left and right index for network and port lists
64 # Name of the VM config file
65 NFVBENCH_CFG_FILENAME = 'nfvbenchvm.conf'
66 # full pathame of the VM config in the VM
67 NFVBENCH_CFG_VM_PATHNAME = os.path.join('/etc/', NFVBENCH_CFG_FILENAME)
68 # full path of the boot shell script template file on the server where nfvbench runs
69 BOOT_SCRIPT_PATHNAME = os.path.join(os.path.dirname(os.path.abspath(__file__)),
71 NFVBENCH_CFG_FILENAME)
74 class ChainException(Exception):
75 """Exception while operating the chains."""
79 class NetworkEncaps(object):
80 """Network encapsulation."""
83 class ChainFlavor(object):
84 """Class to manage the chain flavor."""
86 def __init__(self, flavor_name, flavor_dict, comp):
87 """Create a flavor."""
88 self.name = flavor_name
90 self.flavor = self.comp.find_flavor(flavor_name)
94 LOG.info("Reused flavor '%s'", flavor_name)
96 extra_specs = flavor_dict.pop('extra_specs', None)
98 self.flavor = comp.create_flavor(flavor_name,
101 LOG.info("Created flavor '%s'", flavor_name)
103 self.flavor.set_keys(extra_specs)
106 """Delete this flavor."""
107 if not self.reuse and self.flavor:
109 LOG.info("Flavor '%s' deleted", self.name)
112 class ChainVnfPort(object):
113 """A port associated to one VNF in the chain."""
115 def __init__(self, name, vnf, chain_network, vnic_type):
116 """Create or reuse a port on a given network.
118 if vnf.instance is None the VNF instance is not reused and this ChainVnfPort instance must
120 Otherwise vnf.instance is a reused VNF instance and this ChainVnfPort instance must
121 find an existing port to reuse that matches the port requirements: same attached network,
122 instance, name, vnic type
124 name: name for this port
125 vnf: ChainVNf instance that owns this port
126 chain_network: ChainNetwork instance where this port should attach
127 vnic_type: required vnic type for this port
131 self.manager = vnf.manager
135 # VNF instance is reused, we need to find an existing port that matches this instance
137 # discover ports attached to this instance
138 port_list = self.manager.get_ports_from_network(chain_network)
139 for port in port_list:
140 if port['name'] != name:
142 if port['binding:vnic_type'] != vnic_type:
144 if port['device_id'] == vnf.get_uuid():
146 LOG.info('Reusing existing port %s mac=%s', name, port['mac_address'])
149 raise ChainException('Cannot find matching port')
151 # VNF instance is not created yet, we need to create a new port
155 'network_id': chain_network.get_uuid(),
156 'binding:vnic_type': vnic_type
159 port = self.manager.neutron_client.create_port(body)
160 self.port = port['port']
161 LOG.info('Created port %s', name)
163 self.manager.neutron_client.update_port(self.port['id'], {
165 'security_groups': [],
166 'port_security_enabled': False,
169 LOG.info('Security disabled on port %s', name)
171 LOG.info('Failed to disable security on port %s (ignored)', name)
174 """Get the MAC address for this port."""
175 return self.port['mac_address']
178 """Delete this port instance."""
179 if self.reuse or not self.port:
182 while retry < self.manager.config.generic_retry_count:
184 self.manager.neutron_client.delete_port(self.port['id'])
185 LOG.info("Deleted port %s", self.name)
189 time.sleep(self.manager.config.generic_poll_sec)
190 LOG.error('Unable to delete port: %s', self.name)
193 class ChainNetwork(object):
194 """Could be a shared network across all chains or a chain private network."""
196 def __init__(self, manager, network_config, chain_id=None, lookup_only=False,
198 """Create a network for given chain.
200 network_config: a dict containing the network properties
201 (name, segmentation_id and physical_network)
202 chain_id: to which chain the networks belong.
203 a None value will mean that these networks are shared by all chains
204 suffix: a suffix to add to the network name (if not None)
206 self.manager = manager
208 self.name = network_config.name
210 # the name itself can be either a string or a list of names indexed by chain ID
211 if isinstance(network_config.name, tuple):
212 self.name = network_config.name[chain_id]
214 # network_config.name is a prefix string
215 self.name = network_config.name + str(chain_id)
217 self.name = self.name + suffix
218 self.segmentation_id = self._get_item(network_config.segmentation_id,
219 chain_id, auto_index=True)
220 self.physical_network = self._get_item(network_config.physical_network, chain_id)
226 self._setup(network_config, lookup_only)
229 LOG.error("Cannot find network %s", self.name)
231 LOG.error("Error creating network %s", self.name)
235 def _get_item(self, item_field, index, auto_index=False):
236 """Retrieve an item from a list or a single value.
238 item_field: can be None, a tuple of a single value
239 index: if None is same as 0, else is the index for a chain
240 auto_index: if true will automatically get the final value by adding the
241 index to the base value (if full list not provided)
243 If the item_field is not a tuple, it is considered same as a tuple with same value at any
245 If a list is provided, its length must be > index
251 if isinstance(item_field, tuple):
253 return item_field[index]
255 raise ChainException("List %s is too short for chain index %d" %
256 (str(item_field), index))
257 # single value is configured
259 return item_field + index
262 def _setup(self, network_config, lookup_only):
263 # Lookup if there is a matching network with same name
264 networks = self.manager.neutron_client.list_networks(name=self.name)
265 if networks['networks']:
266 network = networks['networks'][0]
267 # a network of same name already exists, we need to verify it has the same
269 if self.segmentation_id:
270 if network['provider:segmentation_id'] != self.segmentation_id:
271 raise ChainException("Mismatch of 'segmentation_id' for reused "
272 "network '{net}'. Network has id '{seg_id1}', "
273 "configuration requires '{seg_id2}'."
274 .format(net=self.name,
275 seg_id1=network['provider:segmentation_id'],
276 seg_id2=self.segmentation_id))
278 if self.physical_network:
279 if network['provider:physical_network'] != self.physical_network:
280 raise ChainException("Mismatch of 'physical_network' for reused "
281 "network '{net}'. Network has '{phys1}', "
282 "configuration requires '{phys2}'."
283 .format(net=self.name,
284 phys1=network['provider:physical_network'],
285 phys2=self.physical_network))
287 LOG.info('Reusing existing network %s', self.name)
289 self.network = network
292 raise ChainException('Network %s not found' % self.name)
296 'admin_state_up': True
299 if network_config.network_type:
300 body['network']['provider:network_type'] = network_config.network_type
301 if self.segmentation_id:
302 body['network']['provider:segmentation_id'] = self.segmentation_id
303 if self.physical_network:
304 body['network']['provider:physical_network'] = self.physical_network
305 self.network = self.manager.neutron_client.create_network(body)['network']
306 # create associated subnet, all subnets have the same name (which is ok since
307 # we do not need to address them directly by name)
309 'subnet': {'name': network_config.subnet,
310 'cidr': network_config.cidr,
311 'network_id': self.network['id'],
312 'enable_dhcp': False,
314 'dns_nameservers': []}
316 subnet = self.manager.neutron_client.create_subnet(body)['subnet']
317 # add subnet id to the network dict since it has just been added
318 self.network['subnets'] = [subnet['id']]
319 LOG.info('Created network: %s', self.name)
323 Extract UUID of this network.
325 :return: UUID of this network
327 return self.network['id']
331 Extract vlan for this network.
333 :return: vlan ID for this network
335 if self.network['provider:network_type'] != 'vlan':
336 raise ChainException('Trying to retrieve VLAN id for non VLAN network')
337 return self.network['provider:segmentation_id']
341 Extract VNI for this network.
343 :return: VNI ID for this network
345 if 'vxlan' not in self.network['provider:network_type']:
346 raise ChainException('Trying to retrieve VNI for non VXLAN network')
347 return self.network['provider:segmentation_id']
350 """Delete this network."""
351 if not self.reuse and self.network:
353 while retry < self.manager.config.generic_retry_count:
355 self.manager.neutron_client.delete_network(self.network['id'])
356 LOG.info("Deleted network: %s", self.name)
360 LOG.info('Error deleting network %s (retry %d/%d)...',
363 self.manager.config.generic_retry_count)
364 time.sleep(self.manager.config.generic_poll_sec)
365 LOG.error('Unable to delete network: %s', self.name)
368 class ChainVnf(object):
369 """A class to represent a VNF in a chain."""
371 def __init__(self, chain, vnf_id, networks):
372 """Reuse a VNF instance with same characteristics or create a new VNF instance.
374 chain: the chain where this vnf belongs
375 vnf_id: indicates the index of this vnf in its chain (first vnf=0)
376 networks: the list of all networks (ChainNetwork) of the current chain
378 self.manager = chain.manager
381 self.name = self.manager.config.loop_vm_name + str(chain.chain_id)
382 if len(networks) > 2:
383 # we will have more than 1 VM in each chain
384 self.name += '-' + str(vnf_id)
385 # A list of ports for this chain
386 # There are normally 2 ports carrying traffic (index 0, and index 1) and
387 # potentially multiple idle ports not carrying traffic (index 2 and up)
388 # For example if 7 idle interfaces are requested, the corresp. ports will be
395 self.idle_networks = []
398 # the vnf_id is conveniently also the starting index in networks
399 # for the left and right networks associated to this VNF
400 self._setup(networks[vnf_id:vnf_id + 2])
402 LOG.error("Error creating VNF %s", self.name)
406 def _get_vm_config(self, remote_mac_pair):
407 config = self.manager.config
408 devices = self.manager.generator_config.devices
409 with open(BOOT_SCRIPT_PATHNAME, 'r') as boot_script:
410 content = boot_script.read()
411 g1cidr = devices[LEFT].get_gw_ip(self.chain.chain_id) + '/8'
412 g2cidr = devices[RIGHT].get_gw_ip(self.chain.chain_id) + '/8'
414 'forwarder': config.vm_forwarder,
415 'intf_mac1': self.ports[LEFT].get_mac(),
416 'intf_mac2': self.ports[RIGHT].get_mac(),
417 'tg_gateway1_ip': devices[LEFT].tg_gateway_ip_addrs,
418 'tg_gateway2_ip': devices[RIGHT].tg_gateway_ip_addrs,
419 'tg_net1': devices[LEFT].ip_addrs,
420 'tg_net2': devices[RIGHT].ip_addrs,
421 'vnf_gateway1_cidr': g1cidr,
422 'vnf_gateway2_cidr': g2cidr,
423 'tg_mac1': remote_mac_pair[0],
424 'tg_mac2': remote_mac_pair[1]
426 return content.format(**vm_config)
428 def _get_vnic_type(self, port_index):
429 """Get the right vnic type for given port indexself.
431 If SR-IOV is specified, middle ports in multi-VNF chains
432 can use vswitch or SR-IOV based on config.use_sriov_middle_net
434 if self.manager.config.sriov:
435 chain_length = self.chain.get_length()
436 if self.manager.config.use_sriov_middle_net or chain_length == 1:
438 if self.vnf_id == 0 and port_index == 0:
439 # first VNF in chain must use sriov for left port
441 if (self.vnf_id == chain_length - 1) and (port_index == 1):
442 # last VNF in chain must use sriov for right port
446 def _get_idle_networks_ports(self):
447 """Get the idle networks for PVP or PVVP chain (non shared net only)
449 For EXT packet path or shared net, returns empty list.
450 For PVP, PVVP these networks will be created if they do not exist.
451 chain_id: to which chain the networks belong.
452 a None value will mean that these networks are shared by all chains
456 config = self.manager.config
457 chain_id = self.chain.chain_id
458 idle_interfaces_per_vm = config.idle_interfaces_per_vm
459 if config.service_chain == ChainType.EXT or chain_id is None or \
460 idle_interfaces_per_vm == 0:
463 # Make a copy of the idle networks dict as we may have to modify the
465 idle_network_cfg = AttrDict(config.idle_networks)
466 if idle_network_cfg.segmentation_id:
467 segmentation_id = idle_network_cfg.segmentation_id + \
468 chain_id * idle_interfaces_per_vm
470 segmentation_id = None
472 # create as many idle networks and ports as requested
473 for idle_index in range(idle_interfaces_per_vm):
474 if config.service_chain == ChainType.PVP:
475 suffix = '.%d' % (idle_index)
477 suffix = '.%d.%d' % (self.vnf_id, idle_index)
478 port_name = self.name + '-idle' + str(idle_index)
479 # update the segmentation id based on chain id and idle index
481 idle_network_cfg.segmentation_id = segmentation_id + idle_index
482 port_name = port_name + "." + str(segmentation_id)
484 networks.append(ChainNetwork(self.manager,
488 ports.append(ChainVnfPort(port_name,
490 networks[idle_index],
493 # need to cleanup all successful networks
499 self.idle_networks = networks
500 self.idle_ports = ports
502 def _setup(self, networks):
503 flavor_id = self.manager.flavor.flavor.id
504 # Check if we can reuse an instance with same name
505 for instance in self.manager.existing_instances:
506 if instance.name == self.name:
507 # Verify that other instance characteristics match
508 if instance.flavor['id'] != flavor_id:
509 self._reuse_exception('Flavor mismatch')
510 if instance.status != "ACTIVE":
511 self._reuse_exception('Matching instance is not in ACTIVE state')
512 # The 2 networks for this instance must also be reused
513 if not networks[LEFT].reuse:
514 self._reuse_exception('network %s is new' % networks[LEFT].name)
515 if not networks[RIGHT].reuse:
516 self._reuse_exception('network %s is new' % networks[RIGHT].name)
517 # instance.networks have the network names as keys:
518 # {'nfvbench-rnet0': ['192.168.2.10'], 'nfvbench-lnet0': ['192.168.1.8']}
519 if networks[LEFT].name not in instance.networks:
520 self._reuse_exception('Left network mismatch')
521 if networks[RIGHT].name not in instance.networks:
522 self._reuse_exception('Right network mismatch')
525 self.instance = instance
526 LOG.info('Reusing existing instance %s on %s',
527 self.name, self.get_hypervisor_name())
528 # create or reuse/discover 2 ports per instance
529 self.ports = [ChainVnfPort(self.name + '-' + str(index),
532 self._get_vnic_type(index)) for index in [0, 1]]
534 # create idle networks and ports only if instance is not reused
535 # if reused, we do not care about idle networks/ports
537 self._get_idle_networks_ports()
539 # if no reuse, actual vm creation is deferred after all ports in the chain are created
540 # since we need to know the next mac in a multi-vnf chain
542 def create_vnf(self, remote_mac_pair):
543 """Create the VNF instance if it does not already exist."""
544 if self.instance is None:
545 port_ids = [{'port-id': vnf_port.port['id']}
546 for vnf_port in self.ports]
548 for idle_port in self.idle_ports:
549 port_ids.append({'port-id': idle_port.port['id']})
550 vm_config = self._get_vm_config(remote_mac_pair)
551 az = self.manager.placer.get_required_az()
552 server = self.manager.comp.create_server(self.name,
553 self.manager.image_instance,
554 self.manager.flavor.flavor,
561 files={NFVBENCH_CFG_VM_PATHNAME: vm_config})
563 self.instance = server
564 if self.manager.placer.is_resolved():
565 LOG.info('Created instance %s on %s', self.name, az)
567 # the location is undetermined at this point
568 # self.get_hypervisor_name() will return None
569 LOG.info('Created instance %s - waiting for placement resolution...', self.name)
570 # here we MUST wait until this instance is resolved otherwise subsequent
571 # VNF creation can be placed in other hypervisors!
572 config = self.manager.config
573 max_retries = (config.check_traffic_time_sec +
574 config.generic_poll_sec - 1) / config.generic_poll_sec
576 for retry in range(max_retries):
577 status = self.get_status()
578 if status == 'ACTIVE':
579 hyp_name = self.get_hypervisor_name()
580 LOG.info('Instance %s is active and has been placed on %s',
582 self.manager.placer.register_full_name(hyp_name)
584 if status == 'ERROR':
585 raise ChainException('Instance %s creation error: %s' %
587 self.instance.fault['message']))
588 LOG.info('Waiting for instance %s to become active (retry %d/%d)...',
589 self.name, retry + 1, max_retries + 1)
590 time.sleep(config.generic_poll_sec)
593 LOG.error('Instance %s creation timed out', self.name)
594 raise ChainException('Instance %s creation timed out' % self.name)
597 raise ChainException('Unable to create instance: %s' % (self.name))
599 def _reuse_exception(self, reason):
600 raise ChainException('Instance %s cannot be reused (%s)' % (self.name, reason))
602 def get_status(self):
603 """Get the statis of this instance."""
604 if self.instance.status != 'ACTIVE':
605 self.instance = self.manager.comp.poll_server(self.instance)
606 return self.instance.status
608 def get_hostname(self):
609 """Get the hypervisor host name running this VNF instance."""
610 if self.manager.is_admin:
611 hypervisor_hostname = getattr(self.instance, 'OS-EXT-SRV-ATTR:hypervisor_hostname')
613 hypervisor_hostname = self.manager.config.hypervisor_hostname
614 if not hypervisor_hostname:
615 raise ChainException('Hypervisor hostname parameter is mandatory')
616 return hypervisor_hostname
618 def get_host_ip(self):
619 """Get the IP address of the host where this instance runs.
621 return: the IP address
624 self.host_ip = self.manager.comp.get_hypervisor(self.get_hostname()).host_ip
627 def get_hypervisor_name(self):
628 """Get hypervisor name (az:hostname) for this VNF instance."""
630 if self.manager.is_admin:
631 az = getattr(self.instance, 'OS-EXT-AZ:availability_zone')
633 az = self.manager.config.availability_zone
635 raise ChainException('Availability zone parameter is mandatory')
636 hostname = self.get_hostname()
638 return az + ':' + hostname
643 """Get the uuid for this instance."""
644 return self.instance.id
646 def delete(self, forced=False):
647 """Delete this VNF instance."""
649 LOG.info("Instance %s not deleted (reused)", self.name)
652 self.manager.comp.delete_server(self.instance)
653 LOG.info("Deleted instance %s", self.name)
654 for port in self.ports:
656 for port in self.idle_ports:
658 for network in self.idle_networks:
662 """A class to manage a single chain.
664 Can handle any type of chain (EXT, PVP, PVVP)
667 def __init__(self, chain_id, manager):
668 """Create a new chain.
670 chain_id: chain index (first chain is 0)
671 manager: the chain manager that owns all chains
673 self.chain_id = chain_id
674 self.manager = manager
675 self.encaps = manager.encaps
679 self.networks = manager.get_networks(chain_id)
680 # For external chain VNFs can only be discovered from their MAC addresses
681 # either from config or from ARP
682 if manager.config.service_chain != ChainType.EXT:
683 for chain_instance_index in range(self.get_length()):
684 self.instances.append(ChainVnf(self,
685 chain_instance_index,
687 # at this point new VNFs are not created yet but
688 # verify that all discovered VNFs are on the same hypervisor
689 self._check_hypervisors()
690 # now that all VNF ports are created we need to calculate the
691 # left/right remote MAC for each VNF in the chain
692 # before actually creating the VNF itself
693 rem_mac_pairs = self._get_remote_mac_pairs()
694 for instance in self.instances:
695 rem_mac_pair = rem_mac_pairs.pop(0)
696 instance.create_vnf(rem_mac_pair)
701 def _check_hypervisors(self):
702 common_hypervisor = None
703 for instance in self.instances:
704 # get the full hypervizor name (az:compute)
705 hname = instance.get_hypervisor_name()
707 if common_hypervisor:
708 if hname != common_hypervisor:
709 raise ChainException('Discovered instances on different hypervisors:'
710 ' %s and %s' % (hname, common_hypervisor))
712 common_hypervisor = hname
713 if common_hypervisor:
714 # check that the common hypervisor name matchs the requested hypervisor name
715 # and set the name to be used by all future instances (if any)
716 if not self.manager.placer.register_full_name(common_hypervisor):
717 raise ChainException('Discovered hypervisor placement %s is incompatible' %
720 def get_length(self):
721 """Get the number of VNF in the chain."""
722 return len(self.networks) - 1
724 def _get_remote_mac_pairs(self):
725 """Get the list of remote mac pairs for every VNF in the chain.
727 Traverse the chain from left to right and establish the
728 left/right remote MAC for each VNF in the chainself.
731 mac sequence: tg_src_mac, vm0-mac0, vm0-mac1, tg_dst_mac
732 must produce [[tg_src_mac, tg_dst_mac]] or looking at index in mac sequence: [[0, 3]]
733 the mac pair is what the VNF at that position (index 0) sees as next hop mac left and right
736 tg_src_mac, vm0-mac0, vm0-mac1, vm1-mac0, vm1-mac1, tg_dst_mac
737 Must produce the following list:
738 [[tg_src_mac, vm1-mac0], [vm0-mac1, tg_dst_mac]] or index: [[0, 3], [2, 5]]
740 General case with 3 VMs in chain, the list of consecutive macs (left to right):
741 tg_src_mac, vm0-mac0, vm0-mac1, vm1-mac0, vm1-mac1, vm2-mac0, vm2-mac1, tg_dst_mac
742 Must produce the following list:
743 [[tg_src_mac, vm1-mac0], [vm0-mac1, vm2-mac0], [vm1-mac1, tg_dst_mac]]
744 or index: [[0, 3], [2, 5], [4, 7]]
746 The series pattern is pretty clear: [[n, n+3],... ] where n is multiple of 2
748 # line up all mac from left to right
749 mac_seq = [self.manager.generator_config.devices[LEFT].mac]
750 for instance in self.instances:
751 mac_seq.append(instance.ports[0].get_mac())
752 mac_seq.append(instance.ports[1].get_mac())
753 mac_seq.append(self.manager.generator_config.devices[RIGHT].mac)
756 for _ in self.instances:
757 rem_mac_pairs.append([mac_seq[base], mac_seq[base + 3]])
761 def get_instances(self):
762 """Return all instances for this chain."""
763 return self.instances
765 def get_vlan(self, port_index):
766 """Get the VLAN id on a given port.
768 port_index: left port is 0, right port is 1
769 return: the vlan_id or None if there is no vlan tagging
771 # for port 1 we need to return the VLAN of the last network in the chain
772 # The networks array contains 2 networks for PVP [left, right]
773 # and 3 networks in the case of PVVP [left.middle,right]
775 # this will pick the last item in array
777 return self.networks[port_index].get_vlan()
779 def get_vxlan(self, port_index):
780 """Get the VXLAN id on a given port.
782 port_index: left port is 0, right port is 1
783 return: the vxlan_id or None if there is no vxlan
785 # for port 1 we need to return the VLAN of the last network in the chain
786 # The networks array contains 2 networks for PVP [left, right]
787 # and 3 networks in the case of PVVP [left.middle,right]
789 # this will pick the last item in array
791 return self.networks[port_index].get_vxlan()
793 def get_dest_mac(self, port_index):
794 """Get the dest MAC on a given port.
796 port_index: left port is 0, right port is 1
800 # for right port, use the right port MAC of the last (right most) VNF In chain
801 return self.instances[-1].ports[1].get_mac()
802 # for left port use the left port MAC of the first (left most) VNF in chain
803 return self.instances[0].ports[0].get_mac()
805 def get_network_uuids(self):
806 """Get UUID of networks in this chain from left to right (order is important).
808 :return: list of UUIDs of networks (2 or 3 elements)
810 return [net['id'] for net in self.networks]
812 def get_host_ips(self):
813 """Return the IP adresss(es) of the host compute nodes used for this chain.
815 :return: a list of 1 or 2 IP addresses
817 return [vnf.get_host_ip() for vnf in self.instances]
819 def get_compute_nodes(self):
820 """Return the name of the host compute nodes used for this chain.
822 :return: a list of 1 host name in the az:host format
824 # Since all chains go through the same compute node(s) we can just retrieve the
825 # compute node name(s) for the first chain
826 return [vnf.get_hypervisor_name() for vnf in self.instances]
829 """Delete this chain."""
830 for instance in self.instances:
832 # only delete if these are chain private networks (not shared)
833 if not self.manager.config.service_chain_shared_net:
834 for network in self.networks:
838 class InstancePlacer(object):
839 """A class to manage instance placement for all VNFs in all chains.
841 A full az string is made of 2 parts AZ and hypervisor.
842 The placement is resolved when both parts az and hypervisor names are known.
845 def __init__(self, req_az, req_hyp):
846 """Create a new instance placer.
848 req_az: requested AZ (can be None or empty if no preference)
849 req_hyp: requested hypervisor name (can be None of empty if no preference)
850 can be any of 'nova:', 'comp1', 'nova:comp1'
851 if it is a list, only the first item is used (backward compatibility in config)
853 req_az is ignored if req_hyp has an az part
854 all other parts beyond the first 2 are ignored in req_hyp
856 # if passed a list just pick the first item
857 if req_hyp and isinstance(req_hyp, list):
859 # only pick first part of az
860 if req_az and ':' in req_az:
861 req_az = req_az.split(':')[0]
863 # check if requested hypervisor string has an AZ part
864 split_hyp = req_hyp.split(':')
865 if len(split_hyp) > 1:
866 # override the AZ part and hypervisor part
867 req_az = split_hyp[0]
868 req_hyp = split_hyp[1]
869 self.requested_az = req_az if req_az else ''
870 self.requested_hyp = req_hyp if req_hyp else ''
871 # Nova can accept AZ only (e.g. 'nova:', use any hypervisor in that AZ)
872 # or hypervisor only (e.g. ':comp1')
873 # or both (e.g. 'nova:comp1')
875 self.required_az = req_az + ':' + self.requested_hyp
877 # need to insert a ':' so nova knows this is the hypervisor name
878 self.required_az = ':' + self.requested_hyp if req_hyp else ''
879 # placement is resolved when both AZ and hypervisor names are known and set
880 self.resolved = self.requested_az != '' and self.requested_hyp != ''
882 def get_required_az(self):
883 """Return the required az (can be resolved or not)."""
884 return self.required_az
886 def register_full_name(self, discovered_az):
887 """Verify compatibility and register a discovered hypervisor full name.
889 discovered_az: a discovered AZ in az:hypervisor format
890 return: True if discovered_az is compatible and set
891 False if discovered_az is not compatible
894 return discovered_az == self.required_az
896 # must be in full az format
897 split_daz = discovered_az.split(':')
898 if len(split_daz) != 2:
900 if self.requested_az and self.requested_az != split_daz[0]:
902 if self.requested_hyp and self.requested_hyp != split_daz[1]:
904 self.required_az = discovered_az
908 def is_resolved(self):
909 """Check if the full AZ is resolved.
911 return: True if resolved
916 class ChainManager(object):
917 """A class for managing all chains for a given run.
919 Supports openstack or no openstack.
920 Supports EXT, PVP and PVVP chains.
923 def __init__(self, chain_runner):
924 """Create a chain manager to take care of discovering or bringing up the requested chains.
926 A new instance must be created every time a new config is used.
927 config: the nfvbench config to use
928 cred: openstack credentials to use of None if there is no openstack
930 self.chain_runner = chain_runner
931 self.config = chain_runner.config
932 self.generator_config = chain_runner.traffic_client.generator_config
934 self.image_instance = None
935 self.image_name = None
936 # Left and right networks shared across all chains (only if shared)
941 self.nova_client = None
942 self.neutron_client = None
943 self.glance_client = None
944 self.existing_instances = []
945 # existing ports keyed by the network uuid they belong to
946 self._existing_ports = {}
948 self.openstack = (chain_runner.cred is not None) and not config.l2_loopback
949 self.chain_count = config.service_chain_count
953 session = chain_runner.cred.get_session()
954 self.is_admin = chain_runner.cred.is_admin
955 self.nova_client = Client(2, session=session)
956 self.neutron_client = neutronclient.Client('2.0', session=session)
957 self.glance_client = glanceclient.Client('2', session=session)
958 self.comp = compute.Compute(self.nova_client,
962 if config.service_chain != ChainType.EXT:
963 self.placer = InstancePlacer(config.availability_zone, config.compute_nodes)
965 self.flavor = ChainFlavor(config.flavor_type, config.flavor, self.comp)
966 # Get list of all existing instances to check if some instances can be reused
967 self.existing_instances = self.comp.get_server_list()
969 # For EXT chains, the external_networks left and right fields in the config
970 # must be either a prefix string or a list of at least chain-count strings
971 self._check_extnet('left', config.external_networks.left)
972 self._check_extnet('right', config.external_networks.right)
974 # If networks are shared across chains, get the list of networks
975 if config.service_chain_shared_net:
976 self.networks = self.get_networks()
977 # Reuse/create chains
978 for chain_id in range(self.chain_count):
979 self.chains.append(Chain(chain_id, self))
980 if config.service_chain == ChainType.EXT:
981 # if EXT and no ARP or VxLAN we need to read dest MACs from config
982 if config.no_arp or config.vxlan:
983 self._get_dest_macs_from_config()
985 # Make sure all instances are active before proceeding
986 self._ensure_instances_active()
987 # network API call do not show VLANS ID if not admin read from config
988 if not self.is_admin and config.vlan_tagging:
989 self._get_config_vlans()
994 # no openstack, no need to create chains
995 if not config.l2_loopback and config.no_arp:
996 self._get_dest_macs_from_config()
997 if config.vlan_tagging:
998 # make sure there at least as many entries as chains in each left/right list
999 if len(config.vlans) != 2:
1000 raise ChainException('The config vlans property must be a list '
1001 'with 2 lists of VLAN IDs')
1002 self._get_config_vlans()
1004 raise ChainException('VxLAN is only supported with OpenStack')
1006 def _check_extnet(self, side, name):
1008 raise ChainException('external_networks.%s must contain a valid network'
1009 ' name prefix or a list of network names' % side)
1010 if isinstance(name, tuple) and len(name) < self.chain_count:
1011 raise ChainException('external_networks.%s %s'
1012 ' must have at least %d names' % (side, name, self.chain_count))
1014 def _get_config_vlans(self):
1017 self.vlans = [self._check_list('vlans[0]', self.config.vlans[0], re_vlan),
1018 self._check_list('vlans[1]', self.config.vlans[1], re_vlan)]
1020 raise ChainException('vlans parameter is mandatory. Set valid value in config file')
1022 def _get_dest_macs_from_config(self):
1023 re_mac = "[0-9a-fA-F]{2}([-:])[0-9a-fA-F]{2}(\\1[0-9a-fA-F]{2}){4}$"
1024 tg_config = self.config.traffic_generator
1025 self.dest_macs = [self._check_list("mac_addrs_left",
1026 tg_config.mac_addrs_left, re_mac),
1027 self._check_list("mac_addrs_right",
1028 tg_config.mac_addrs_right, re_mac)]
1030 def _check_list(self, list_name, ll, pattern):
1031 # if it is a single int or mac, make it a list of 1 int
1032 if isinstance(ll, (int, str)):
1035 if not re.match(pattern, str(item)):
1036 raise ChainException("Invalid format '{item}' specified in {fname}"
1037 .format(item=item, fname=list_name))
1038 # must have at least 1 element
1040 raise ChainException('%s cannot be empty' % (list_name))
1041 # for shared network, if 1 element is passed, replicate it as many times
1043 if self.config.service_chain_shared_net and len(ll) == 1:
1044 ll = [ll[0]] * self.chain_count
1046 # number of elements musty be the number of chains
1047 elif len(ll) < self.chain_count:
1048 raise ChainException('%s=%s must be a list with %d elements per chain' %
1049 (list_name, ll, self.chain_count))
1052 def _setup_image(self):
1053 # To avoid reuploading image in server mode, check whether image_name is set or not
1055 self.image_instance = self.comp.find_image(self.image_name)
1056 if self.image_instance:
1057 LOG.info("Reusing image %s", self.image_name)
1059 image_name_search_pattern = r'(nfvbenchvm-\d+(\.\d+)*).qcow2'
1060 if self.config.vm_image_file:
1061 match = re.search(image_name_search_pattern, self.config.vm_image_file)
1063 self.image_name = match.group(1)
1064 LOG.info('Using provided VM image file %s', self.config.vm_image_file)
1066 raise ChainException('Provided VM image file name %s must start with '
1067 '"nfvbenchvm-<version>"' % self.config.vm_image_file)
1069 pkg_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
1070 for f in os.listdir(pkg_root):
1071 if re.search(image_name_search_pattern, f):
1072 self.config.vm_image_file = pkg_root + '/' + f
1073 self.image_name = f.replace('.qcow2', '')
1074 LOG.info('Found built-in VM image file %s', f)
1077 raise ChainException('Cannot find any built-in VM image file.')
1079 self.image_instance = self.comp.find_image(self.image_name)
1080 if not self.image_instance:
1081 LOG.info('Uploading %s', self.image_name)
1082 res = self.comp.upload_image_via_url(self.image_name,
1083 self.config.vm_image_file)
1086 raise ChainException('Error uploading image %s from %s. ABORTING.' %
1087 (self.image_name, self.config.vm_image_file))
1088 LOG.info('Image %s successfully uploaded.', self.image_name)
1089 self.image_instance = self.comp.find_image(self.image_name)
1091 def _ensure_instances_active(self):
1093 for chain in self.chains:
1094 instances.extend(chain.get_instances())
1095 initial_instance_count = len(instances)
1096 max_retries = (self.config.check_traffic_time_sec +
1097 self.config.generic_poll_sec - 1) / self.config.generic_poll_sec
1100 remaining_instances = []
1101 for instance in instances:
1102 status = instance.get_status()
1103 if status == 'ACTIVE':
1104 LOG.info('Instance %s is ACTIVE on %s',
1105 instance.name, instance.get_hypervisor_name())
1107 if status == 'ERROR':
1108 raise ChainException('Instance %s creation error: %s' %
1110 instance.instance.fault['message']))
1111 remaining_instances.append(instance)
1112 if not remaining_instances:
1115 if retry >= max_retries:
1116 raise ChainException('Time-out: %d/%d instances still not active' %
1117 (len(remaining_instances), initial_instance_count))
1118 LOG.info('Waiting for %d/%d instance to become active (retry %d/%d)...',
1119 len(remaining_instances), initial_instance_count,
1121 instances = remaining_instances
1122 time.sleep(self.config.generic_poll_sec)
1123 if initial_instance_count:
1124 LOG.info('All instances are active')
1126 def get_networks(self, chain_id=None):
1127 """Get the networks for given EXT, PVP or PVVP chain.
1129 For EXT packet path, these networks must pre-exist.
1130 For PVP, PVVP these networks will be created if they do not exist.
1131 chain_id: to which chain the networks belong.
1132 a None value will mean that these networks are shared by all chains
1135 # the only case where self.networks exists is when the networks are shared
1137 return self.networks
1138 if self.config.service_chain == ChainType.EXT:
1140 ext_net = self.config.external_networks
1141 net_cfg = [AttrDict({'name': name,
1142 'segmentation_id': None,
1143 'physical_network': None})
1144 for name in [ext_net.left, ext_net.right]]
1145 # segmentation id and subnet should be discovered from neutron
1148 int_nets = self.config.internal_networks
1150 if self.config.service_chain == ChainType.PVP:
1151 net_cfg = [int_nets.left, int_nets.right]
1153 net_cfg = [int_nets.left, int_nets.middle, int_nets.right]
1157 networks.append(ChainNetwork(self, cfg, chain_id, lookup_only=lookup_only))
1159 # need to cleanup all successful networks prior to bailing out
1160 for net in networks:
1165 def get_existing_ports(self):
1166 """Get the list of existing ports.
1168 Lazy retrieval of ports as this can be costly if there are lots of ports and
1169 is only needed when VM and network are being reused.
1171 return: a dict of list of neutron ports indexed by the network uuid they are attached to
1173 Each port is a dict with fields such as below:
1174 {'allowed_address_pairs': [], 'extra_dhcp_opts': [],
1175 'updated_at': '2018-10-06T07:15:35Z', 'device_owner': 'compute:nova',
1176 'revision_number': 10, 'port_security_enabled': False, 'binding:profile': {},
1177 'fixed_ips': [{'subnet_id': '6903a3b3-49a1-4ba4-8259-4a90e7a44b21',
1178 'ip_address': '192.168.1.4'}], 'id': '3dcb9cfa-d82a-4dd1-85a1-fd8284b52d72',
1179 'security_groups': [],
1180 'binding:vif_details': {'vhostuser_socket': '/tmp/3dcb9cfa-d82a-4dd1-85a1-fd8284b52d72',
1181 'vhostuser_mode': 'server'},
1182 'binding:vif_type': 'vhostuser',
1183 'mac_address': 'fa:16:3e:3c:63:04',
1184 'project_id': '977ac76a63d7492f927fa80e86baff4c',
1186 'binding:host_id': 'a20-champagne-compute-1',
1188 'device_id': 'a98e2ad2-5371-4aa5-a356-8264a970ce4b',
1189 'name': 'nfvbench-loop-vm0-0', 'admin_state_up': True,
1190 'network_id': '3ea5fd88-278f-4d9d-b24d-1e443791a055',
1191 'tenant_id': '977ac76a63d7492f927fa80e86baff4c',
1192 'created_at': '2018-10-06T07:15:10Z',
1193 'binding:vnic_type': 'normal'}
1195 if not self._existing_ports:
1196 LOG.info('Loading list of all ports...')
1197 existing_ports = self.neutron_client.list_ports()['ports']
1198 # place all ports in the dict keyed by the port network uuid
1199 for port in existing_ports:
1200 port_list = self._existing_ports.setdefault(port['network_id'], [])
1201 port_list.append(port)
1202 LOG.info("Loaded %d ports attached to %d networks",
1203 len(existing_ports), len(self._existing_ports))
1204 return self._existing_ports
1206 def get_ports_from_network(self, chain_network):
1207 """Get the list of existing ports that belong to a network.
1209 Lazy retrieval of ports as this can be costly if there are lots of ports and
1210 is only needed when VM and network are being reused.
1212 chain_network: a ChainNetwork instance for which attached ports neeed to be retrieved
1213 return: list of neutron ports attached to requested network
1215 return self.get_existing_ports().get(chain_network.get_uuid(), None)
1217 def get_hypervisor_from_mac(self, mac):
1218 """Get the hypervisor that hosts a VM MAC.
1220 mac: MAC address to look for
1221 return: the hypervisor where the matching port runs or None if not found
1223 # _existing_ports is a dict of list of ports indexed by network id
1224 for port_list in self.get_existing_ports().values():
1225 for port in port_list:
1227 if port['mac_address'] == mac:
1228 host_id = port['binding:host_id']
1229 return self.comp.get_hypervisor(host_id)
1234 def get_host_ip_from_mac(self, mac):
1235 """Get the host IP address matching a MAC.
1237 mac: MAC address to look for
1238 return: the IP address of the host where the matching port runs or None if not found
1240 hypervisor = self.get_hypervisor_from_mac(mac)
1242 return hypervisor.host_ip
1245 def get_chain_vlans(self, port_index):
1246 """Get the list of per chain VLAN id on a given port.
1248 port_index: left port is 0, right port is 1
1249 return: a VLAN ID list indexed by the chain index or None if no vlan tagging
1251 if self.chains and self.is_admin:
1252 return [self.chains[chain_index].get_vlan(port_index)
1253 for chain_index in range(self.chain_count)]
1255 return self.vlans[port_index]
1257 def get_chain_vxlans(self, port_index):
1258 """Get the list of per chain VNIs id on a given port.
1260 port_index: left port is 0, right port is 1
1261 return: a VNIs ID list indexed by the chain index or None if no vlan tagging
1263 if self.chains and self.is_admin:
1264 return [self.chains[chain_index].get_vxlan(port_index)
1265 for chain_index in range(self.chain_count)]
1267 raise ChainException('VxLAN is only supported with OpenStack and with admin user')
1269 def get_dest_macs(self, port_index):
1270 """Get the list of per chain dest MACs on a given port.
1272 Should not be called if EXT+ARP is used (in that case the traffic gen will
1273 have the ARP responses back from VNFs with the dest MAC to use).
1275 port_index: left port is 0, right port is 1
1276 return: a list of dest MACs indexed by the chain index
1278 if self.chains and self.config.service_chain != ChainType.EXT:
1279 return [self.chains[chain_index].get_dest_mac(port_index)
1280 for chain_index in range(self.chain_count)]
1281 # no openstack or EXT+no-arp
1282 return self.dest_macs[port_index]
1284 def get_host_ips(self):
1285 """Return the IP adresss(es) of the host compute nodes used for this run.
1287 :return: a list of 1 IP address
1289 # Since all chains go through the same compute node(s) we can just retrieve the
1290 # compute node(s) for the first chain
1292 if self.config.service_chain != ChainType.EXT:
1293 return self.chains[0].get_host_ips()
1294 # in the case of EXT, the compute node must be retrieved from the port
1295 # associated to any of the dest MACs
1296 dst_macs = self.generator_config.get_dest_macs()
1297 # dest MAC on port 0, chain 0
1298 dst_mac = dst_macs[0][0]
1299 host_ip = self.get_host_ip_from_mac(dst_mac)
1301 LOG.info('Found compute node IP for EXT chain: %s', host_ip)
1305 def get_compute_nodes(self):
1306 """Return the name of the host compute nodes used for this run.
1308 :return: a list of 0 or 1 host name in the az:host format
1310 # Since all chains go through the same compute node(s) we can just retrieve the
1311 # compute node name(s) for the first chain
1313 # in the case of EXT, the compute node must be retrieved from the port
1314 # associated to any of the dest MACs
1315 if self.config.service_chain != ChainType.EXT:
1316 return self.chains[0].get_compute_nodes()
1317 # in the case of EXT, the compute node must be retrieved from the port
1318 # associated to any of the dest MACs
1319 dst_macs = self.generator_config.get_dest_macs()
1320 # dest MAC on port 0, chain 0
1321 dst_mac = dst_macs[0][0]
1322 hypervisor = self.get_hypervisor_from_mac(dst_mac)
1324 LOG.info('Found hypervisor for EXT chain: %s', hypervisor.hypervisor_hostname)
1325 return[':' + hypervisor.hypervisor_hostname]
1327 # no openstack = no chains
1331 """Delete resources for all chains."""
1332 for chain in self.chains:
1334 for network in self.networks:
1337 self.flavor.delete()