258493

/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_lib.py

上部为修改后，下部为未修改源文件。

OpenStack版本：Liberty

系统平台：CentOS 7.2 64bit

网络模型：VLAN(external)+VXLAN(private)

###############################################################

1.现象

创建虚拟路由器，将子网关联上去，并设置到external的路由网关

[plain] view plain copy

neutronrouter-createrouter
neutronrouter-interface-addrouterprivate
neutronrouter-gateway-setrouterprovider-91

查看路由端口

[plain] view plain copy

neutronrouter-port-listrouter
+--------------------------------------+------+-------------------+---------------------------------------------------------------------------------------+
|id|name|mac_address|fixed_ips|
+--------------------------------------+------+-------------------+---------------------------------------------------------------------------------------+
|0b7755a1-70a2-4b3c-84a1-cdbe945b0f0b||fa:16:3e:3e:86:1b|{"subnet_id":"aba7f133-8a02-41a1-9fec-4b26dac82503","ip_address":"192.168.91.106"}|
|e55502e7-4779-4c03-9468-dbe401bcb876||fa:16:3e:3f:6f:49|{"subnet_id":"1a04665d-92a2-416d-aaea-c68455ee3fe3","ip_address":"172.16.1.1"}|
+--------------------------------------+------+-------------------+---------------------------------------------------------------------------------------+

在external测试路由网关IP发现不通，查看路由网关端口发现状态为DOWN，如下：

[plain] view plain copy

neutronport-list
+--------------------------------------+------+-------------------+---------------------------------------------------------------------------------------+
|id|name|mac_address|fixed_ips|
+--------------------------------------+------+-------------------+---------------------------------------------------------------------------------------+
|0b7755a1-70a2-4b3c-84a1-cdbe945b0f0b||fa:16:3e:3e:86:1b|{"subnet_id":"aba7f133-8a02-41a1-9fec-4b26dac82503","ip_address":"192.168.91.106"}|
|11265aeb-2e5b-490a-9c02-5e29c59fb73d||fa:16:3e:63:61:c1|{"subnet_id":"aba7f133-8a02-41a1-9fec-4b26dac82503","ip_address":"192.168.91.100"}|
|1a2261d2-b5c0-4503-b0ce-8dab7690d96a||fa:16:3e:90:fa:0b|{"subnet_id":"aba7f133-8a02-41a1-9fec-4b26dac82503","ip_address":"192.168.91.105"}|
|2f41bf61-9679-4677-99bc-45cc18ff05cc||fa:16:3e:f8:dc:09|{"subnet_id":"c4347434-781c-4c1c-b8b8-a963b5e80b77","ip_address":"192.168.91.80"}|
|30095087-8c71-4fba-88ce-af0887b8e091||fa:16:3e:31:d3:6a|{"subnet_id":"aba7f133-8a02-41a1-9fec-4b26dac82503","ip_address":"192.168.91.101"}|
|4b011b62-77cb-4642-9bcf-b80a9296c703||fa:16:3e:ce:ee:a9|{"subnet_id":"1a04665d-92a2-416d-aaea-c68455ee3fe3","ip_address":"172.16.1.2"}|
|6470514b-c1e9-4d6e-88b3-22dde2f00fca||fa:16:3e:a2:d5:55|{"subnet_id":"aba7f133-8a02-41a1-9fec-4b26dac82503","ip_address":"192.168.91.104"}|
|8e1802f6-1d68-4511-8232-781f0451ea15||fa:16:3e:84:b7:b8|{"subnet_id":"c4347434-781c-4c1c-b8b8-a963b5e80b77","ip_address":"192.168.91.81"}|
|a6c31bc9-7ee0-46da-943a-9836270a9801||fa:16:3e:9e:0a:00|{"subnet_id":"1a04665d-92a2-416d-aaea-c68455ee3fe3","ip_address":"172.16.1.3"}|
|e55502e7-4779-4c03-9468-dbe401bcb876||fa:16:3e:3f:6f:49|{"subnet_id":"1a04665d-92a2-416d-aaea-c68455ee3fe3","ip_address":"172.16.1.1"}|
+--------------------------------------+------+-------------------+---------------------------------------------------------------------------------------+

neutronport-show0b7755a1-70a2-4b3c-84a1-cdbe945b0f0b
+-----------------------+--------------------------------------------------------------------------------------------------------------------+
|Field|Value|
+-----------------------+--------------------------------------------------------------------------------------------------------------------+
|admin_state_up|True|
|allowed_address_pairs||
|binding:host_id|controller|
|binding:profile|{}|
|binding:vif_details|{"port_filter":true,"ovs_hybrid_plug":true}|
|binding:vif_type|ovs|
|binding:vnic_type|normal|
|device_id|a9fd9767-2c15-4eb6-8c76-49dcce18fc7f|
|device_owner|network:router_gateway|
|dns_assignment|{"hostname":"host-192-168-91-106","ip_address":"192.168.91.106","fqdn":"host-192-168-91-106.openstacklocal."}|
|dns_name||
|extra_dhcp_opts||
|fixed_ips|{"subnet_id":"aba7f133-8a02-41a1-9fec-4b26dac82503","ip_address":"192.168.91.106"}|
|id|0b7755a1-70a2-4b3c-84a1-cdbe945b0f0b|
|mac_address|fa:16:3e:3e:86:1b|
|name||
|network_id|d8bfeca0-2273-4c7c-8872-a5baf5100600|
|port_security_enabled|False|
|security_groups||
|status|DOWN|
|tenant_id||
+-----------------------+--------------------------------------------------------------------------------------------------------------------+

查看router网络命名空间，发现没有到external的路由网关

ipnetns
qrouter-a9fd9767-2c15-4eb6-8c76-49dcce18fc7f
qdhcp-9fad5a29-6944-4dd9-85e6-16571775082f
qdhcp-d8bfeca0-2273-4c7c-8872-a5baf5100600
qdhcp-de942cde-e0c7-4d91-8aa9-3496ec86ba8c

ipnetnsexecqrouter-a9fd9767-2c15-4eb6-8c76-49dcce18fc7froute-n
KernelIProutingtable
DestinationGatewayGenmaskFlagsMetricRefUseIface
172.16.1.00.0.0.0255.255.255.0U000qr-e55502e7-47

2.问题解决
修改模块文件/lib/python2.7/site-packages/neutron/agent/Linux/ip_lib.py相应内容如下：

......
@classmethod
defget_namespaces(cls):
output=cls._execute([],'netns',('list',))
return[l.split()[0]forlinoutput.splitlines()]
......
defexists(self,name):
output=self._parent._execute(
['o'],'netns',['list'],
run_as_root=cfg.CONF.AGENT.use_helper_for_ns_read)
forlinein[l.split()[0]forlinoutput.splitlines()]:
ifname==line:
returnTrue
returnFalse
......

目前官网已经修复此BUG，你也可以直接通过yumupgrade升级系统包iproute解决。 优质内容筛选与推荐>>
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官方原文链接：https://review.openstack.org/#/c/258493

OpenStack版本：Liberty

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