네트워크가 안되요 ㅠㅠ이어형

주제

• 인간적으로 왜 내 네트워크는 안되는 것일까..(전생에 죄를 너무 지었나..)

• 어디서부터 잘못된건지 모르겠다..

• 우선 이게 잘못되긴 한건가?

목표

•어디에서 안되요라고 말할 수 있자(어떻게 고치냐는 그 다음 문제로..)

이것만 이해해 보자

http://docs.openstack.org/havana/config-reference/content/under_the_hood_openvswitch.html

config$ cat /etc/nova/nova-compute.conf [DEFAULT] libvirt_ovs_bridge=br-int libvirt_vif_type=ethernet libvirt_vif_driver=nova.virt.libvirt.vif.LibvirtHybridOVSBridgeDriver libvirt_use_virtio_for_bridges=True ... !$ cat /etc/nova/nova.conf [DEFAULT] network_api_class=nova.network.neutronv2.api.API linuxnet_interface_driver=nova.network.linux_net.LinuxOVSInterfaceDriver libvirt_vif_driver=nova.virt.libvirt.vif.LibvirtHybridOVSBridgeDriver ...

!$ cat /etc/neutron/neutron.conf [DEFAULT] core_plugin = neutron.plugins.openvswitch.ovs_neutron_plugin.OVSNeutronPluginV2 ... !$ cat /etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini [ovs] tenant_network_type = vlan network_vlan_ranges = default:1000:2999 enable_tunneling = False integration_bridge = br-int bridge_mappings = default:br-eth1 ...

TAP(Test Access Point) device

TAP(Test Access Point) device

• A TAP device, such as vnet0 is how hypervisors such as KVM and Xen implement a virtual network interface card.

• An ethernet frame sent to a TAP device is received by the guest operating system.

vm: $ ip a 2: eth0: … link/ether fa:16:3e:49:94:00 brd ff:ff:ff:ff:ff:ff inet 10.10.100.6/24 brd 10.10.100.255 scope global eth0 inet6 fe80::f816:3eff:fe49:9400/64 scope link !compute-node:$ ip a 22: tapbb4782e2-d1(vnet0): … link/ether fe:16:3e:49:94:00 brd ff:ff:ff:ff:ff:ff inet6 fe80::fc16:3eff:fe49:9400/64 scope link !

fa:16:3e:49:94:00fe:16:3e:49:94:00

$ cat /etc/libvirt/qemu/instance-00000002.xml <domain type='kvm'> <devices> <interface type='bridge'> <mac address='fa:16:3e:49:94:00'/> <source bridge='qbrbb4782e2-d1'/> <target dev='tapbb4782e2-d1'/> …

VETH(Virtual ETHernet) pair

VETH(Virtual ETHernet) pair

• A veth pair is a pair of virtual network interfaces correctly directly together. An ethernet frame sent to one end of a veth pair is received by the other end of a veth pair.

• OpenStack networking makes use of veth pairs as virtual patch cables in order to make connections between virtual bridges.

$ ip a 20: qvobb4782e2-d1: … 21: qvbbb4782e2-d1: … !$ ethtool -S qvbbb4782e2-d1 NIC statistics: peer_ifindex: 20 $ ethtool -S qvobb4782e2-d1 NIC statistics: peer_ifindex: 21

$ ip a 14: phy-br-eth1: … 15: int-br-eth1: … !$ ethtool -S int-br-eth1 NIC statistics: peer_ifindex: 14 $ ethtool -S phy-br-eth1 NIC statistics: peer_ifindex: 15

$ ip a 9: tap5bd4ac3b-87: … $ ip netns qdhcp-fb57d1bd-e0e5-484c-b5d7-9ad807d9e7b8 $ ip netns exec qdhcp-fb57d1bd-e0e5-484c-b5d7-9ad807d9e7b8 ip a 8: ns-5bd4ac3b-87: … !$ ethtool -S tap5bd4ac3b-87 NIC statistics: peer_ifindex: 8 $ ip netns exec qdhcp-fb57d1bd-e0e5-484c-b5d7-9ad807d9e7b8 \ ethtool -S ns-5bd4ac3b-87 NIC statistics: peer_ifindex: 9

Linux bridge

Linux bridge• A Linux bridge behaves like a hub: you can connect multiple (physical or virtual) network interfaces devices to a Linux bridge.

• Any ethernet frames that come in from one interface attached to the bridge is transmitted to all of the other devices.

$ brctl show bridge name bridge id … interfaces qbrbb4782e2-d1 8000.3a7ef7e39d98 … qvbbb4782e2-d1 tapbb4782e2-d1(vnet0) $ ip a 19: qbrbb4782e2-d1: … link/ether 3a:7e:f7:e3:9d:98 brd ff:ff:ff:ff:ff:ff inet6 fe80::d8e3:16ff:fef5:f854/64 scope link

$ cat /etc/libvirt/qemu/instance-00000002.xml <domain type='kvm'> <devices> <interface type='bridge'> <mac address='fa:16:3e:49:94:00'/> <source bridge='qbrbb4782e2-d1'/> <target dev='tapbb4782e2-d1'/> …

Open vSwitch

Open vSwitch• An Open vSwitch bridge behaves like a virtual switch: network interface devices connect to Open vSwitch bridge's ports, and the ports can be configured much like a physical switch's ports, including VLAN configurations.

$ ovs-vsctl show Bridge "br-eth1" Port "br-eth1" Interface "br-eth1" type: internal Port "eth1" Interface "eth1" Port "phy-br-eth1" Interface "phy-br-eth1" Bridge br-int Port "tapad3cdca6-b4" tag: 1 Interface "tapad3cdca6-b4" Port "qvobb4782e2-d1" tag: 1 Interface "qvobb4782e2-d1" Port br-int Interface br-int type: internal Port "int-br-eth1" Interface "int-br-eth1"

Open vSwitch vlan tag

$ ovs-vsctl show Bridge "br-eth1" Port "br-eth1" Interface "br-eth1" type: internal Port "eth1" Interface "eth1" Port "phy-br-eth1" Interface "phy-br-eth1" Bridge br-int Port "tapad3cdca6-b4" tag: 1 Interface "tapad3cdca6-b4" Port "qvobb4782e2-d1" tag: 1 Interface "qvobb4782e2-d1" Port br-int Interface br-int type: internal Port "int-br-eth1" Interface "int-br-eth1"

•vlan tag해당 bridge에서 port를 지날때: - tag 1이 적힌 packet은 tag를 제거하고 통과시킴해당 port에서 bridge를 지날때: - packet에 tag 1을 적음

Open vSwitch vlan tag(cont.)

listening on int-br-eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.522128 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype 802.1Q (0x8100), length 366: vlan 1000, p 0, ethertype IPv4, 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320 !listening on qvobb4782e2-d1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.522145 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype IPv4 (0x0800), length 362: 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320

listening on qvobb4782e2-d1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.520237 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype IPv4 (0x0800), length 322: 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 280 !listening on int-br-eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.520416 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype 802.1Q (0x8100), length 326: vlan 1, p 0, ethertype IPv4, 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 280

1이 아니라???(이유는 다음페이지에)

Open vSwitch openflow

$ ovs-ofctl dump-flows br-int cookie=0x0, duration=16341.203s, table=0, n_packets=565, n_bytes=49002, idle_age=25, priority=3,in_port=6,dl_vlan=1000 actions=mod_vlan_vid:1,NORMAL !$ ovs-ofctl show br-int 4(tapad3cdca6-b4): addr:b6:d6:c3:21:d6:8b 5(qvobb4782e2-d1): addr:96:08:78:a7:6e:c3 6(int-br-eth1): addr:86:c3:4d:be:3c:28 LOCAL(br-int): addr:8a:07:eb:db:29:43

$ ovs-ofctl dump-flows br-eth1 cookie=0x0, duration=16383.978s, table=0, n_packets=304, n_bytes=28968, idle_age=63, priority=4,in_port=5,dl_vlan=1 actions=mod_vlan_vid:1000,NORMAL !$ ovs-ofctl show br-eth1 1(eth1): addr:52:54:00:a9:77:da 5(phy-br-eth1): addr:a6:34:72:93:db:47 LOCAL(br-eth1): addr:d2:34:ce:41:5f:42

Open vSwitch openflow(cont.)

listening on int-br-eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.532608 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype 802.1Q (0x8100), length 338: vlan 1, p 0, ethertype IPv4, 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 292 !listening on phy-br-eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.532610 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype 802.1Q (0x8100), length 338: vlan 1, p 0, ethertype IPv4, 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 292 !listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.532618 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype 802.1Q (0x8100), length 338: vlan 1000, p 0, ethertype IPv4, 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 292

listening on phy-br-eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.533273 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype 802.1Q (0x8100), length 366: vlan 1000, p 0, ethertype IPv4, 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320 !listening on int-br-eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.533276 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype 802.1Q (0x8100), length 366: vlan 1000, p 0, ethertype IPv4, 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320 !listening on qvobb4782e2-d1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.533278 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype IPv4 (0x0800), length 362: 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320

int-br-eth1를 지나면서 vlan1000 -> vlan 1 br-int에서 qvobb4782e2-d1 vlan1 -> 제거

vm 안에서 DHCP query 시 예제

listening on tapbb4782e2-d1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.520196 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype IPv4 (0x0800), length 322: 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 280 22:47:12.522162 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype IPv4 (0x0800), length 362: 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320 22:47:12.532570 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype IPv4 (0x0800), length 334: 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 292 22:47:12.533296 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype IPv4 (0x0800), length 362: 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320 ───────────────────────────────────────────────────────────────────────────────────────────────────── listening on qbrbb4782e2-d1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.520196 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype IPv4 (0x0800), length 322: 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 280 22:47:12.522148 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype IPv4 (0x0800), length 362: 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320 22:47:12.532570 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype IPv4 (0x0800), length 334: 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 292 22:47:12.533279 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype IPv4 (0x0800), length 362: 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320 ───────────────────────────────────────────────────────────────────────────────────────────────────── listening on qvbbb4782e2-d1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.520233 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype IPv4 (0x0800), length 322: 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 280 22:47:12.522148 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype IPv4 (0x0800), length 362: 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320 22:47:12.532592 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype IPv4 (0x0800), length 334: 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 292 22:47:12.533279 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype IPv4 (0x0800), length 362: 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320

vm 안에서 DHCP query 시 예제 (cont.)

!listening on qvobb4782e2-d1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.520237 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype IPv4 (0x0800), length 322: 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 280 22:47:12.522145 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype IPv4 (0x0800), length 362: 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320 22:47:12.532594 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype IPv4 (0x0800), length 334: 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 292 22:47:12.533278 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype IPv4 (0x0800), length 362: 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320 ───────────────────────────────────────────────────────────────────────────────────────────────────────────────────── listening on int-br-eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.520416 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype 802.1Q (0x8100), length 326: vlan 1, p 0, ethertype IPv4, 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 280 22:47:12.522128 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype 802.1Q (0x8100), length 366: vlan 1000, p 0, ethertype IPv4, 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320 22:47:12.532608 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype 802.1Q (0x8100), length 338: vlan 1, p 0, ethertype IPv4, 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 292 22:47:12.533276 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype 802.1Q (0x8100), length 366: vlan 1000, p 0, ethertype IPv4, 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320 ───────────────────────────────────────────────────────────────────────────────────────────────────────────────────── listening on phy-br-eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.520423 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype 802.1Q (0x8100), length 326: vlan 1, p 0, ethertype IPv4, 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 280 22:47:12.532610 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype 802.1Q (0x8100), length 338: vlan 1, p 0, ethertype IPv4, 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 292 22:47:12.533273 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype 802.1Q (0x8100), length 366: vlan 1000, p 0, ethertype IPv4, 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320 ───────────────────────────────────────────────────────────────────────────────────────────────────────────────────── listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 22:47:12.520483 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype 802.1Q (0x8100), length 326: vlan 1000, p 0, ethertype IPv4, 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 280 22:47:12.521992 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype 802.1Q (0x8100), length 366: vlan 1000, p 0, ethertype IPv4, 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320 22:47:12.532618 fa:16:3e:49:94:00 (oui Unknown) > Broadcast, ethertype 802.1Q (0x8100), length 338: vlan 1000, p 0, ethertype IPv4, 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:49:94:00 (oui Unknown), length 292 22:47:12.533269 8a:63:60:38:ee:ab (oui Unknown) > fa:16:3e:49:94:00 (oui Unknown), ethertype 802.1Q (0x8100), length 366: vlan 1000, p 0, ethertype IPv4, 10.10.100.1.bootps > 10.10.100.6.bootpc: BOOTP/DHCP, Reply, length 320

naming 규칙 - vm$ ovs-vsctl show Bridge br-int Port br-int Interface br-int type: internal Port "tap5bd4ac3b-87" tag: 1 Interface "tap5bd4ac3b-87" Port "qvo9b393545-d2" tag: 1 Interface "qvo9b393545-d2" Port "int-br-eth1" Interface "int-br-eth1" Bridge "br-eth1" Port "phy-br-eth1" Interface "phy-br-eth1" Port "br-eth1" Interface "br-eth1" type: internal Port "eth1" Interface "eth1" ovs_version: "1.10.2"

$ brctl show bridge name bridge id … interfaces qbr9b393545-d2 8000.528f51e452bd … qvb9b393545-d2 tap9b393545-d2

$ neutron port-show 9b393545-d24e-4e15-96f6-1d5c4437df3b +-----------------------+----------------------------------------------------+ | Field                 | Value                                              | +-----------------------+----------------------------------------------------+ | admin_state_up        | True                                               | | allowed_address_pairs |                                                    | | binding:capabilities  | {"port_filter": true}                              | | binding:host_id       | compute000                                         | | binding:vif_type      | ovs                                                | | device_id             | b23fd9d4-786f-4cc7-926b-e8130172eba8               | | device_owner          | compute:nova                                       | | extra_dhcp_opts       |                                                    | | fixed_ips             | {"subnet_id": “…”, "ip_address": "10.10.100.5"} | | id                    | 9b393545-d24e-4e15-96f6-1d5c4437df3b               | | mac_address           | fa:16:3e:f5:8f:0b                                  | | name                  |                                                    | | network_id            | fb57d1bd-e0e5-484c-b5d7-9ad807d9e7b8               | | security_groups       | b931451e-ef3e-4bcb-8957-5dc204e75841               | | status                | ACTIVE                                             | | tenant_id             | 4bf01d6534e04b228121b0337922c847                   | +-----------------------+----------------------------------------------------+

naming 규칙 - dhcp

$ ovs-vsctl show Bridge br-int Port br-int Interface br-int type: internal Port "tap5bd4ac3b-87" tag: 1 Interface "tap5bd4ac3b-87" Port "qvo9b393545-d2" tag: 1 Interface "qvo9b393545-d2" Port "int-br-eth1" Interface "int-br-eth1" …

$ ip netns qdhcp-fb57d1bd-e0e5-484c-b5d7-9ad807d9e7b8 !$ ip netns exec qdhcp-fb57d1bd-e0e5-484c-b5d7-9ad807d9e7b8 ip a 8: ns-5bd4ac3b-87: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

$ neutron port-show 5bd4ac3b-8756-486b-8f37-9b1b91a01aa4 +-----------------------+------------------------------------------------------------------------------------+ | Field                 | Value                                                                              | +-----------------------+------------------------------------------------------------------------------------+ | admin_state_up        | True                                                                               | | allowed_address_pairs |                                                                                    | | binding:capabilities  | {"port_filter": true}                                                              | | binding:host_id       | compute000                                                                         | | binding:vif_type      | ovs                                                                                | | device_id             | dhcp9cc4f5f0-74b7-534a-96b6-24721bc36ac3-fb57d1bd-e0e5-484c-b5d7-9ad807d9e7b8      | | device_owner          | network:dhcp                                                                       | | fixed_ips             | {"subnet_id": “fdb58d3a-cb5b-42a2-aefb-a3400206a0c1”, "ip_address": "10.10.100.2"} | | id                    | 5bd4ac3b-8756-486b-8f37-9b1b91a01aa4                                               | | mac_address           | fa:16:3e:78:b6:28                                                                  | | network_id            | fb57d1bd-e0e5-484c-b5d7-9ad807d9e7b8                                               | | status                | ACTIVE                                                                             | | tenant_id             | 4bf01d6534e04b228121b0337922c847                                                   | +-----------------------+------------------------------------------------------------------------------------+

compute000:$ python -c 'import uuid ; print uuid.uuid5(uuid.NAMESPACE_DNS, "compute000")' 9cc4f5f0-74b7-534a-96b6-24721bc36ac3

next step

마지막으로 비밀은..

• 언제나 그렇듯이 RTF(fuc^H^H^H fun)M..

• http://docs.openstack.org/trunk/openstack-ops/content/network_troubleshooting.html

• http://docs.openstack.org/havana/config-reference/content/under_the_hood_openvswitch.html

감사합니다.