云计算openstack---虚拟机获取不到ip（12）

一、现象描述

　　openstack平台中创建虚拟机后，虚拟机在web页面中显示获取到了ip，但是打开虚拟机控制台后查看网络状态，虚拟机没有ip地址，下图为故障截图：

二、分析思路

1、查看neutron服务状态，确保DHCP服务是否正常运行

[root@ren3 ~]# neutron agent-list
neutron CLI is deprecated and will be removed in the future. Use openstack CLI instead.
+----------+------------+------+-------------------+-------+----------------+-----------+
| id       | agent_type | host | availability_zone | alive | admin_state_up | binary    |
+----------+------------+------+-------------------+-------+----------------+-----------+
| 8279aaae | Open       | ren3 |                   | :-)   | True           | neutron-o |
| -eb89-4c | vSwitch    |      |                   |       |                | penvswitc |
| 71-bbae- | agent      |      |                   |       |                | h-agent   |
| 009971a6 |            |      |                   |       |                |           |
| 97e3     |            |      |                   |       |                |           |
| 954aaea4 | L3 agent   | ren3 | nova              | :-)   | True           | neutron-l |
| -b4c3-4d |            |      |                   |       |                | 3-agent   |
| bc-b104- |            |      |                   |       |                |           |
| 76917908 |            |      |                   |       |                |           |
| 7cd0     |            |      |                   |       |                |           |
| a1b7aee2 | Metadata   | ren3 |                   | :-)   | True           | neutron-  |
| -2881-4d | agent      |      |                   |       |                | metadata- |
| 85-b119- |            |      |                   |       |                | agent     |
| 1bf8195f |            |      |                   |       |                |           |
| 66fc     |            |      |                   |       |                |           |
| e67163c1 | DHCP agent | ren3 | nova              | :-)   | True           | neutron-  |
| -8513-4f |            |      |                   |       |                | dhcp-     |
| d7-be6a- |            |      |                   |       |                | agent     |
| ae8e0acf |            |      |                   |       |                |           |
| 83ce     |            |      |                   |       |                |           |
| ed288124 | Open       | ren4 |                   | :-)   | True           | neutron-o |
| -f0ab-   | vSwitch    |      |                   |       |                | penvswitc |
| 4a63     | agent      |      |                   |       |                | h-agent   |
| -aa4e-a2 |            |      |                   |       |                |           |
| 04051ef8 |            |      |                   |       |                |           |
| b8       |            |      |                   |       |                |           |
+----------+------------+------+-------------------+-------+----------------+-----------+

2、查看dnsmasq进程是否正常

[root@ren3 ~]# ps aux |grep dnsmasq
nobody    24061  0.0  0.0  53900   920 ?        S    08:48   0:00 dnsmasq --no-hosts --no-resolv --strict-order --except-interface=lo --pid-file=/var/lib/neutron/dhcp/266e6738-3092-4929-801d-de8cea1266b5/pid --dhcp-hostsfile=/var/lib/neutron/dhcp/266e6738-3092-4929-801d-de8cea1266b5/host --addn-hosts=/var/lib/neutron/dhcp/266e6738-3092-4929-801d-de8cea1266b5/addn_hosts --dhcp-optsfile=/var/lib/neutron/dhcp/266e6738-3092-4929-801d-de8cea1266b5/opts --dhcp-leasefile=/var/lib/neutron/dhcp/266e6738-3092-4929-801d-de8cea1266b5/leases --dhcp-match=set:ipxe,175 --bind-interfaces --interface=tap2119082d-5b --dhcp-range=set:tag0,192.168.11.0,static,86400s --dhcp-option-force=option:mtu,1450 --dhcp-lease-max=256 --conf-file= --domain=openstacklocal
nobody    24064  0.0  0.0  53900   864 ?        S    08:48   0:00 dnsmasq --no-hosts --no-resolv --strict-order --except-interface=lo --pid-file=/var/lib/neutron/dhcp/5717a706-54d9-4f03-8936-e8a27e8aaa3a/pid --dhcp-hostsfile=/var/lib/neutron/dhcp/5717a706-54d9-4f03-8936-e8a27e8aaa3a/host --addn-hosts=/var/lib/neutron/dhcp/5717a706-54d9-4f03-8936-e8a27e8aaa3a/addn_hosts --dhcp-optsfile=/var/lib/neutron/dhcp/5717a706-54d9-4f03-8936-e8a27e8aaa3a/opts --dhcp-leasefile=/var/lib/neutron/dhcp/5717a706-54d9-4f03-8936-e8a27e8aaa3a/leases --dhcp-match=set:ipxe,175 --bind-interfaces --interface=tap6ceaf383-ff --dhcp-range=set:tag0,12.12.12.0,static,86400s --dhcp-option-force=option:mtu,1450 --dhcp-lease-max=256 --conf-file= --domain=openstacklocal
root      30097  0.0  0.0 112728   976 pts/0    R+   14:26   0:00 grep --color=auto dnsmasq

3、检查ovs网桥中的br-int集成网桥是否有tap设备连接到了dhcp-agent的namespace上

原文地址：https://www.cnblogs.com/renyz/p/11692257.html