Jump to: navigation, search

Difference between revisions of "Obsolete:Neutron/FakeVM"

(Created page with "== Overview == FakeVM provides testing environment for Neutron without Nova(excpet nova libvirt vif driver).<br /> With this, we can emulate create/delete/migrate VM port, an...")
 
Line 70: Line 70:
 
Path to nova.conf. This is used by the vif wrapper of FakeVM.<br />
 
Path to nova.conf. This is used by the vif wrapper of FakeVM.<br />
 
Default is /etc/nova/nova.conf.
 
Default is /etc/nova/nova.conf.
 +
 +
The following parameters are used.<br />
 +
libvirt_vif_driver = <vif driver><br />
 +
libvirt_type = <kvm|qemu><br />
 +
libvirt_use_virtio_for_bridges = <True|False><br />
 +
firewall_driver = <firewall driver>
  
 
'''enable_multi_node_emulate = <True|False>'''<br />
 
'''enable_multi_node_emulate = <True|False>'''<br />

Revision as of 09:11, 30 July 2013

Overview

FakeVM provides testing environment for Neutron without Nova(excpet nova libvirt vif driver).
With this, we can emulate create/delete/migrate VM port, and operate on the network device like ping.
In addition to the above, FakeVM can emulate multi-compute node with single host.
(However migrate isn't emulated due to interface name conflict)


Setup

Setup Neutron (and its agents) as usual. And run neutron-fakevm-agent.


Command

neutron-fakevm <command> [options] [parameters]

options

--host <hostname>: host name to operate

command

create-port <network-id> <instance-id>
create Neutron port and plug vif on specified host

delete-port <vif-uuid>
unplug vif and delete Neutron port

migrate <destination-host> <vif-uuid>
migrate vif from host that was specified by --host option to destination host

plug <vif-uuid>
plug vif on specified host

unplug <vif-uuid>
unplug vif on specified host

unplug-all-host <vif-uuid>
unplug vif on all host

exec <vif-uuid> commands
execute commands for <vif-uuid>

Configuration

neutron-fakevm-agent has some configuration parameters.
These parameters belong to [fakevm] group.

common parameters

host = <host name>
The name of a host which run the agent.

fakevm_agent_plugin = <plugin module>
FakeVM Agent Plugin class which is corresponding to Neutron Plugin.
There are three plugins.

linuxbridge Plugin: neutron.debug.fakevm.plugins.linuxbridge.NeutronFakeVMAgentLB

Open vSwitch Plugin: neutron.debug.fakevm.plugins.openvswitch.NeutronFakeVMAgentOVS

Ryu Plugin: neutron.debug.fakevm.plugins.ryu.NeutronFakeVMAgentRyu

vif_wrapper = <path>
Path to FakeVM VIF Wrapper.
For example, '/opt/stack/neutron/neutron/debug/fakevm/vif.py' for devstack environment.

nova_conf = <path>
Path to nova.conf. This is used by the vif wrapper of FakeVM.
Default is /etc/nova/nova.conf.

The following parameters are used.
libvirt_vif_driver = <vif driver>
libvirt_type = <kvm|qemu>
libvirt_use_virtio_for_bridges = <True|False>
firewall_driver = <firewall driver>

enable_multi_node_emulate = <True|False>
Enable the multi node emulation. Default is False.

For OVS and Ryu plugin

vir_bridge = <name>
Bridge name to be used for the vlan mode of the multi node emulation.

use_tunnel = <True|False>
Use tunnel or not. set True when tunneling of Neutron OVS plugin is enabled. Default is False.

OVS plugin only

tunnel_interface = <name>
Tunnel interface to use when use_tunnel is enabled.


Limitations

emulate live-migrate

In order to emulate live-migrate, two hosts are necessary. This is due to conflict of network interface name. On Linux network interface name is limited to 14 bytes or so.

emulate multi-compute node

  • linuxbridge

At this moment, FakeVM linuxbridge plugin does not support the multi node emulation. This is due to conflict of a bridge name.

  • Open vSwitch and Ryu

At this moment, It is necessary to modify Open vSwitch to use the tunnel mode of the multi node emulation.
See the following URL for the details:
http://openvswitch.org/pipermail/dev/2013-June/028943.html


Structure

In FakeVM agent, there are two functions. One is create of a probe interface. And the second is emulate the environment of a multiple compute node on the host. The realization ways are different by each FakeVM agent plugin.

Probe interface

  • Open vSwitch/Ryu

The nova vif driver makes a veth and linux bridge for the port. An interface of veth is connected to br-int and the other interface is connected to the linux bridge. FakeVM agent plugin makes a extra veth and connect an interface to the bridge and the other interface is used as a probe interface. The agent plugin creates also a namespace for the probe interface to separate each probes. 

   +----------+
   |          |
   |  br-int  |
   |          |
   +---[qvo]--+
         |               .... ns = fakevm-<HOST>-<PORT-ID> ...
         |               :
 +-----[qvb]------+      :
 |                |      :
 |  qbr<PORT-ID> [qfb]-----[qfv]
 |                |      :
 +----------------+      :
                         :
  • linuxbridge

Neutron linuxbridge plugin agent handles the interface of the name that starts with 'tap'. Therefore it is necessary for the name of the probe interface to starts with 'tap'. FakeVM agent plugin makes a veth with the interface of the name that starts with 'tap'. The interface is connected to the bridge for a Neutron network. And the other is used as a probe interface. 

                           .... ns = fakevm-<HOST>-<PORT-ID> ...
 +-------------------+     :
 |                   |     :
 |  brq<NETWORK-ID> [tap]-----[qfv]
 |                   |     :
 +-------------------+     :

Multi node emulation

  • Open vSwitch

There are two modes of VLAN and Tunnel. In VLAN mode, OVS bridge of the each host is connected via bridge. When a provider network is used, a Linux bridge is created for each physical network. 

 +-------------------+  +-------------------+
 |                   |  |                   |
 |      br-int1      |  |      br-int2      |
 |                   |  |                   |
 +--[int-<PHY-BR1>]--+  +--[int-<PHY-BR2>]--+
           |                      |
           |                      |
 +--[phy-<PHY-BR1>]--+  +--[phy-<PHY-BR2>]--+
 |                   |  |                   |
 |      PHY-BR1      |  |      PHY-BR2      |
 |                   |  |                   |
 +--[qfo<PHY-BR1>]---+  +---[qfo<PHY-BR2>]--+
            |                    |
            |                    |
    +--[qfb<PHY-BR1>]----[qfb<PHY-BR2>]--+
    |                                    |
    |           bfv-<PHY-NET1>           |
    |                                    |
    +------------------------------------+

br-int1 is for a host 1, and br-int2 is for the other host 2.
On host1, bridge_mappings is configured as <PHY-NET1>:<PHY-BR1>.
On host2, bridge_mappings is configured as <PHY-NET1>:<PHY-BR2>.

In the tunnel mode, the dummy interface for each host is created, and an IP address for tunnel is assigned to the interface.

NOTE: To use tunnel mode, it is necessary to modify Open vSwitch. Please see Limitations section above.

  • linuxbridge

FakeVM agent linuxbridge plugin does not support the multi node emulation now. Because the name of the bridge which Neutron linuxbridge plugin makes conflicts. The name of the bridge is made by prefix 'brq' and network ID. The prefix is defined statically, and the network ID is unique. So we cannot avoid conflict.

  • Ryu

There are two modes like OVS. VLAN mode is simpler than OVS's because Neutron Ryu plugin does not support the provider network yet. It connects each OVS bridge by a bridge simply. 

 +-------------------+  +-------------------+
 |                   |  |                   |
 |      br-int1      |  |      br-int2      |
 |                   |  |                   |
 +----[qfo<HOST1>]---+  +---[qfo<HOST2>]----+
           |                      |
           |                      |
    +--[qfb<HOST1>]--------[qfb<HOST2>]--+
    |                                    |
    |             br-fakevm              |
    |                                    |
    +------------------------------------+

The tunnel mode is same as OVS's.


Example

Single node, create a port and do ping from the probe

Use devstack to setup.

localrc 

   # only runs keystone and neutron. other components are not necessary
   ENABLED_SERVICES=""  # disable all of default enabled services
   enable_service rabbit
   enable_service key
   enable_service mysql
   enable_service neutron
   enable_service q-agt
   enable_service q-l3
   enable_service q-dhcp
   enable_service q-svc
   # q-meta makes sense only with nova
   # plus your neutron plugin settings...
   
   Q_PLUGIN=openvswitch
   ENABLE_TENANT_TUNNELS=False
   ENABLE_TENANT_VLANS=True
   PHYSICAL_NETWORK=phy1
   TENANT_VLAN_RANGE=200:300
   OVS_PHYSICAL_BRIDGE=br-eth1
   
   # And necessary parameters...

Run devstack, then start fakevm agent.

fakevm.ini 

   [default]
   debug = True
   verbose = True
   
   [fakevm]
   host = guest1
   vif_wrapper = /opt/stack/neutron/neutron/debug/fakevm/vif.py
   nova_conf = /etc/nova/nova.conf
   fakevm_agent_plugin = neutron.debug.fakevm.fakevm_agent_ovs.NeutronFakeVMAgentOVS
   enable_multi_node_emulate = False

 $ neutron-fakevm-agent --config-file /etc/neutron/neutron.conf \
 --config-file /etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini \
 --config-file ./fakevm.ini

Then create a port. 

 $ . ./openrc admin demo
 $ neutron net-list
 +--------------------------------------+---------+-------------------------------------------------------+
 | id                                   | name    | subnets                                               |
 +--------------------------------------+---------+-------------------------------------------------------+
 | 18f725c7-dd56-42ba-975d-e444152a0377 | public  | 76d5e916-2353-4025-a61a-2e5ca8a15708 192.168.100.0/24 |
 | 5379c0d2-9a0d-4bc5-a028-a0c0c7df336d | private | ee138a17-cdf4-436f-b651-0245201ea71e 10.0.0.0/24      |
 +--------------------------------------+---------+-------------------------------------------------------+
 $ 
 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 create-port --host guest1 5379c0d2-9a0d-4bc5-a028-a0c0c7df336d i-xxxx
 :::
 VM port created on guest1: vif_uuid: d7e577a9-a9cd-46a4-870c-2754641e6b87 mac: fa:16:3e:87:e6:4f tenant_id: 43dd8e1496104939bca6256edf874661
 fixed_ips: [{u'subnet_id': u'ee138a17-cdf4-436f-b651-0245201ea71e', u'ip_address': u'10.0.0.3'}]
 netowrk: {u'status': u'ACTIVE', u'subnets': [u'ee138a17-cdf4-436f-b651-0245201ea71e'], u'name': u'private', u'provider:physical_network': u'phy1', u'admin_state_up': True, u'tenant_id': u'43dd8e1496104939bca6256edf874661', u'provider:network_type': u'vlan', u'router:external': False, u'shared': False, u'id': u'5379c0d2-9a0d-4bc5-a028-a0c0c7df336d', u'provider:segmentation_id': 200}
 $ 
 $ neutron port-list
 +--------------------------------------+------+-------------------+--------------------------------------------------------------------------------------+
 | id                                   | name | mac_address       | fixed_ips                                                                            |
 +--------------------------------------+------+-------------------+--------------------------------------------------------------------------------------+
 | 4c12d56c-83fd-4b8e-8ad9-7b5823259e7d |      | fa:16:3e:07:5e:3e | {"subnet_id": "ee138a17-cdf4-436f-b651-0245201ea71e", "ip_address": "10.0.0.2"}      |
 | 9ffdbffd-e8eb-4ae2-ad86-d0ca50303251 |      | fa:16:3e:34:55:5e | {"subnet_id": "76d5e916-2353-4025-a61a-2e5ca8a15708", "ip_address": "192.168.100.2"} |
 | b167fd32-3d4d-4a21-911e-230aa245bf32 |      | fa:16:3e:bb:91:68 | {"subnet_id": "ee138a17-cdf4-436f-b651-0245201ea71e", "ip_address": "10.0.0.1"}      |
 | d7e577a9-a9cd-46a4-870c-2754641e6b87 |      | fa:16:3e:87:e6:4f | {"subnet_id": "ee138a17-cdf4-436f-b651-0245201ea71e", "ip_address": "10.0.0.3"}      |
 +--------------------------------------+------+-------------------+--------------------------------------------------------------------------------------+
 $

Assign IP address to the probe interface by using dhclient. 

 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 exec --host guest1 d7e577a9-a9cd-46a4-870c-2754641e6b87 "ip link"
 :::
 VM port executeon guest1: d7e577a9-a9cd-46a4-870c-2754641e6b87 ip link
 19: qfvd7e577a9-a: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
     link/ether fa:16:3e:87:e6:4f brd ff:ff:ff:ff:ff:ff
 21: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
 
 $ 
 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 exec --host guest1 d7e577a9-a9cd-46a4-870c-2754641e6b87 "dhclient -4 -v qfvd7e577a9-a"
 :::
 VM port executeon guest1: d7e577a9-a9cd-46a4-870c-2754641e6b87 dhclient -4 -v qfvd7e577a9-a
 
 $ 
 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 exec --host guest1 d7e577a9-a9cd-46a4-870c-2754641e6b87 "ifconfig"
 :::
 VM port executeon guest1: d7e577a9-a9cd-46a4-870c-2754641e6b87 ifconfig
 lo        Link encap:Local Loopback  
           inet addr:127.0.0.1  Mask:255.0.0.0
           inet6 addr: ::1/128 Scope:Host
           UP LOOPBACK RUNNING  MTU:16436  Metric:1
           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0 
           RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
 
 qfvd7e577a9-a Link encap:Ethernet  HWaddr fa:16:3e:87:e6:4f  
           inet addr:10.0.0.3  Bcast:10.0.0.255  Mask:255.255.255.0
           inet6 addr: fe80::f816:3eff:fe87:e64f/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:20 errors:0 dropped:0 overruns:0 frame:0
           TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000 
           RX bytes:2304 (2.3 KB)  TX bytes:1528 (1.5 KB)

Ping from the probe interface to the DHCP port on Neutron network. 

 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 exec --host guest1 d7e577a9-a9cd-46a4-870c-2754641e6b87 "ping -c1 10.0.0.2"
 :::
 VM port executeon guest1: d7e577a9-a9cd-46a4-870c-2754641e6b87 ping -c1 10.0.0.2
 
 PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data.
 64 bytes from 10.0.0.2: icmp_req=1 ttl=64 time=44.1 ms
 
 --- 10.0.0.2 ping statistics ---
 1 packets transmitted, 1 received, 0% packet loss, time 0ms
 rtt min/avg/max/mdev = 44.159/44.159/44.159/0.000 ms
 
 $

Multi node and emulate live-migration

On the other physical host, run FakeVM agent and Neutron plugin agent.

fakevm.ini 

   [default]
   debug = True
   verbose = True
   
   [fakevm]
   host = guest2
   vif_wrapper = /opt/stack/neutron/neutron/debug/fakevm/vif.py
   nova_conf = /etc/nova/nova.conf
   fakevm_agent_plugin = neutron.debug.fakevm.fakevm_agent_ovs.NeutronFakeVMAgentOVS
   enable_multi_node_emulate = False

 $ neutron-fakevm-agent --config-file /etc/neutron/neutron.conf \
 --config-file /etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini \
 --config-file ./fakevm.ini

 $ sudo ovs-vsctl add-br br-int
 $ sudo ovs-vsctl add-br br-eth1
 $ sudo ovs-vsctl add-port br-eth1 eth1
 $ neutron-openvswitch-agent --debug --verbose \
 --config-file /etc/neutron/neutron.conf \
 --config-file /etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini

Then operate on the original node. 

 $ sudo ovs-vsctl add-port br-eth1 eth1
 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 create-port --host guest2 5379c0d2-9a0d-4bc5-a028-a0c0c7df336d i-yyyy
 :::
 VM port created on guest2: vif_uuid: 418874ff-571b-46e2-a28a-75fe8afcb9e1 mac: fa:16:3e:c8:c0:34 tenant_id: 43dd8e1496104939bca6256edf874661
 fixed_ips: [{u'subnet_id': u'ee138a17-cdf4-436f-b651-0245201ea71e', u'ip_address': u'10.0.0.4'}]
 netowrk: {u'status': u'ACTIVE', u'subnets': [u'ee138a17-cdf4-436f-b651-0245201ea71e'], u'name': u'private', u'provider:physical_network': u'phy1', u'admin_state_up': True, u'tenant_id': u'43dd8e1496104939bca6256edf874661', u'provider:network_type': u'vlan', u'router:external': False, u'shared': False, u'id': u'5379c0d2-9a0d-4bc5-a028-a0c0c7df336d', u'provider:segmentation_id': 200}
 $ 
 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 exec --host guest2 418874ff-571b-46e2-a28a-75fe8afcb9e1 "ip link"
 :::
 VM port executeon guest2: 418874ff-571b-46e2-a28a-75fe8afcb9e1 ip link
 17: qfv418874ff-5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
     link/ether fa:16:3e:c8:c0:34 brd ff:ff:ff:ff:ff:ff
 19: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
 
 $ 
 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 exec --host guest2 418874ff-571b-46e2-a28a-75fe8afcb9e1 "dhclient -4 -v qfv418874ff-5"
 :::
 VM port executeon guest2: 418874ff-571b-46e2-a28a-75fe8afcb9e1 dhclient -4 -v qfv418874ff-5
 
 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 exec --host guest2 418874ff-571b-46e2-a28a-75fe8afcb9e1 "ifconfig"
 :::
 VM port executeon guest2: 418874ff-571b-46e2-a28a-75fe8afcb9e1 ifconfig
 lo        Link encap:Local Loopback  
           inet addr:127.0.0.1  Mask:255.0.0.0
           inet6 addr: ::1/128 Scope:Host
           UP LOOPBACK RUNNING  MTU:16436  Metric:1
           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0 
           RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
 
 qfv418874ff-5 Link encap:Ethernet  HWaddr fa:16:3e:c8:c0:34  
           inet addr:10.0.0.4  Bcast:10.0.0.255  Mask:255.255.255.0
           inet6 addr: fe80::f816:3eff:fec8:c034/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:22 errors:0 dropped:0 overruns:0 frame:0
           TX packets:15 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000 
           RX bytes:2130 (2.1 KB)  TX bytes:2734 (2.7 KB)
 
 
 $

Ping from the other node to the original node. 

 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 exec --host guest2 418874ff-571b-46e2-a28a-75fe8afcb9e1 "ping -c1 10.0.0.3"
 :::
 VM port executeon guest2: 418874ff-571b-46e2-a28a-75fe8afcb9e1 ping -c1 10.0.0.3
 
 PING 10.0.0.3 (10.0.0.3) 56(84) bytes of data.
 64 bytes from 10.0.0.3: icmp_req=1 ttl=64 time=10.9 ms
 
 --- 10.0.0.3 ping statistics ---
 1 packets transmitted, 1 received, 0% packet loss, time 0ms
 rtt min/avg/max/mdev = 10.921/10.921/10.921/0.000 ms
 
 $

Then try emulation of live-migration 

 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 exec --host guest2 418874ff-571b-46e2-a28a-75fe8afcb9e1 "dhclient -4 -r qfv418874ff-5"
 :::
 VM port executeon guest2: 418874ff-571b-46e2-a28a-75fe8afcb9e1 dhclient -4 -r qfv418874ff-5
 
 $ 
 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 migrate --host guest2 guest1 418874ff-571b-46e2-a28a-75fe8afcb9e1
 :::
 VM migrate : 418874ff-571b-46e2-a28a-75fe8afcb9e1 guest2 -> guest1
 $ 
 $ ip link|grep qvo
 17: qvod7e577a9-a9: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
 32: qvo418874ff-57: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
 $

Multi node emulation

On the original host, modify configuration to enable the multi node mode and restart FakeVM agent.

fakevm.ini 

   [default]
   debug = True
   verbose = True
   
   [fakevm]
   host = guest1
   vif_wrapper = /opt/stack/neutron/neutron/debug/fakevm/vif.py
   nova_conf = /etc/nova/nova.conf
   fakevm_agent_plugin = neutron.debug.fakevm.fakevm_agent_ovs.NeutronFakeVMAgentOVS
   enable_multi_node_emulate = True
   use_tunnel = False
   vir_bridge = br-fakevm

 $ neutron-fakevm-agent --config-file /etc/neutron/neutron.conf \
 --config-file /etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini \
 --config-file ./fakevm.ini

Run Neutron plugin agent and FakeVM agent on the same machine with different configuration.

guest3.ini 

   [ovs]
   integration_bridge = br-int2
   bridge_mappings = phy1:br-eth2
   
   [fakevm]
   host = guest3

 $ neutron-fakevm-agent --config-file /etc/neutron/neutron.conf \
 --config-file /etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini \
 --config-file ./fakevm.ini --config-file ./guest3.ini

 $ neutron-openvswitch-agent --debug --verbose \
 --config-file /etc/neutron/neutron.conf \
 --config-file /etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini \
 --config-file ./guest3.ini

Then create a port on the emulated node. 

 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 create-port --host guest3 5379c0d2-9a0d-4bc5-a028-a0c0c7df336d i-zzzz
 :::
 VM port created on guest3: vif_uuid: c29cfc8c-c978-4025-8fa9-0a6c791bb31b mac: fa:16:3e:fc:f8:3e tenant_id: 43dd8e1496104939bca6256edf874661
 fixed_ips: [{u'subnet_id': u'ee138a17-cdf4-436f-b651-0245201ea71e', u'ip_address': u'10.0.0.5'}]
 netowrk: {u'status': u'ACTIVE', u'subnets': [u'ee138a17-cdf4-436f-b651-0245201ea71e'], u'name': u'private', u'provider:physical_network': u'phy1', u'admin_state_up': True, u'tenant_id': u'43dd8e1496104939bca6256edf874661', u'provider:network_type': u'vlan', u'router:external': False, u'shared': False, u'id': u'5379c0d2-9a0d-4bc5-a028-a0c0c7df336d', u'provider:segmentation_id': 200}
 $ 
 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 exec --host guest3 c29cfc8c-c978-4025-8fa9-0a6c791bb31b "ip link"
 :::
 VM port executeon guest3: c29cfc8c-c978-4025-8fa9-0a6c791bb31b ip link
 49: qfvc29cfc8c-c: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
     link/ether fa:16:3e:fc:f8:3e brd ff:ff:ff:ff:ff:ff
 51: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
 
 $ 
 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 exec --host guest3 c29cfc8c-c978-4025-8fa9-0a6c791bb31b "dhclient -4 -v qfvc29cfc8c-c"
 :::
 VM port executeon guest3: c29cfc8c-c978-4025-8fa9-0a6c791bb31b dhclient -4 -v qfvc29cfc8c-c
 
 $ 
 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 exec --host guest3 c29cfc8c-c978-4025-8fa9-0a6c791bb31b "ifconfig"
 :::
 VM port executeon guest3: c29cfc8c-c978-4025-8fa9-0a6c791bb31b ifconfig
 lo        Link encap:Local Loopback  
           inet addr:127.0.0.1  Mask:255.0.0.0
           inet6 addr: ::1/128 Scope:Host
           UP LOOPBACK RUNNING  MTU:16436  Metric:1
           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0 
           RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
 
 qfvc29cfc8c-c Link encap:Ethernet  HWaddr fa:16:3e:fc:f8:3e  
           inet addr:10.0.0.5  Bcast:10.0.0.255  Mask:255.255.255.0
           inet6 addr: fe80::f816:3eff:fefc:f83e/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:21 errors:0 dropped:0 overruns:0 frame:0
           TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000 
           RX bytes:2076 (2.0 KB)  TX bytes:1272 (1.2 KB)
 
 
 $

Ping from the emulated node to the original node. 

 $ neutron-fakevm --config-file /etc/neutron/neutron.conf \
 exec --host guest3 c29cfc8c-c978-4025-8fa9-0a6c791bb31b "ping -c1 10.0.0.3"
 :::
 VM port executeon guest3: c29cfc8c-c978-4025-8fa9-0a6c791bb31b ping -c1 10.0.0.3
 
 PING 10.0.0.3 (10.0.0.3) 56(84) bytes of data.
 64 bytes from 10.0.0.3: icmp_req=1 ttl=64 time=11.8 ms
 
 --- 10.0.0.3 ping statistics ---
 1 packets transmitted, 1 received, 0% packet loss, time 0ms
 rtt min/avg/max/mdev = 11.899/11.899/11.899/0.000 ms
 
 $
Retrieved from "https://wiki.openstack.org/w/index.php?title=Obsolete:Neutron/FakeVM&oldid=27158"