(转载)[BUG] Neutron创建虚拟路由器,端口状态为down,设置路由网关未生效

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)

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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

neutron router-create router
neutron router-interface-add router private
neutron router-gateway-set router provider-91

查看路由端口

[plain] view plain copy

neutron router-port-list router
+--------------------------------------+------+-------------------+---------------------------------------------------------------------------------------+
| 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

neutron port-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"} |
+--------------------------------------+------+-------------------+---------------------------------------------------------------------------------------+

neutron port-show 0b7755a1-70a2-4b3c-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

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

ip netns exec qrouter-a9fd9767-2c15-4eb6-8c76-49dcce18fc7f route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
172.16.1.0 0.0.0.0 255.255.255.0 U 0 0 0 qr-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
def get_namespaces(cls):
output = cls._execute([], 'netns', ('list',))
return [l.split()[0] for l in output.splitlines()]
......
def exists(self, name):
output = self._parent._execute(
['o'], 'netns', ['list'],
run_as_root=cfg.CONF.AGENT.use_helper_for_ns_read)
for line in [l.split()[0] for l in output.splitlines()]:
if name == line:
return True
return False
......

目前官网已经修复此BUG，你也可以直接通过yum upgrade升级系统包iproute解决。