openstack team mailing list archive

[Lei Zhang <zhang.lei.fly@xxxxxxxxx>]

There may be some mistake exist. Just know, the vlan works as expected.


On Tue, Mar 12, 2013 at 12:02 PM, Lei Zhang <zhang.lei.fly@xxxxxxxxx> wrote:

> Hi all,
>
> I am testing the nova-network + vlan + multi_host. But I found that the
> ip_forward is enable automatically when launch new instances. You can check
> the code
> https://github.com/openstack/nova/blob/master/nova/network/linux_net.py#L770
>
> I found there is some issue seriously when the ip_forward=1 on compute
> node. Here my testing process
>
> Controller:
>
> [root@openstack-controller conf.d]# ip a
> 1: 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
>     inet 127.0.0.1/8 scope host lo
>     inet6 ::1/128 scope host
>        valid_lft forever preferred_lft forever
> 2: p3p1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
>     link/ether 90:b1:1c:0d:87:79 brd ff:ff:ff:ff:ff:ff
>     inet 192.168.3.10/24 brd 192.168.3.255 scope global p3p1
>     inet6 fe80::92b1:1cff:fe0d:8779/64 scope link
>        valid_lft forever preferred_lft forever
> 3: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
>     link/ether 90:b1:1c:0d:87:7a brd ff:ff:ff:ff:ff:ff
>     inet 172.16.0.10/24 brd 172.16.0.255 scope global em1
>     inet6 fe80::92b1:1cff:fe0d:877a/64 scope link
>        valid_lft forever preferred_lft forever
>
> Computer Node:
>
> [root@openstack-node2 vlan]# ip a
> 2: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
>
>     link/ether 90:b1:1c:0d:73:ea brd ff:ff:ff:ff:ff:ff
>     inet 172.16.0.12/24 brd 172.16.0.255 scope global em1
>     inet6 fe80::92b1:1cff:fe0d:73ea/64 scope link
>        valid_lft forever preferred_lft forever
> 4: p3p1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
>     link/ether 00:10:18:f7:4a:34 brd ff:ff:ff:ff:ff:ff
>     inet 192.168.3.12/24 brd 192.168.3.255 scope global p3p1
>     inet 192.168.3.33/32 scope global p3p1
>     inet6 fe80::210:18ff:fef7:4a34/64 scope link
>        valid_lft forever preferred_lft forever
> 9: vlan102@em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
>     link/ether fa:16:3e:54:ea:11 brd ff:ff:ff:ff:ff:ff
>     inet6 fe80::f816:3eff:fe54:ea11/64 scope link
>        valid_lft forever preferred_lft forever
> 10: br102: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
>     link/ether fa:16:3e:54:ea:11 brd ff:ff:ff:ff:ff:ff
>     inet 10.0.102.4/24 brd 10.0.102.255 scope global br102
>     inet6 fe80::2816:24ff:feb5:5770/64 scope link
>        valid_lft forever preferred_lft forever
> 11: vlan103@em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
>     link/ether fa:16:3e:3a:a0:20 brd ff:ff:ff:ff:ff:ff
>     inet6 fe80::f816:3eff:fe3a:a020/64 scope link
>        valid_lft forever preferred_lft forever
> 12: br103: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
>     link/ether fa:16:3e:3a:a0:20 brd ff:ff:ff:ff:ff:ff
>     inet 10.0.103.4/24 brd 10.0.103.255 scope global br103
>     inet6 fe80::480c:f2ff:fe9b:a600/64 scope link
>        valid_lft forever preferred_lft forever
> 13: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 500
>     link/ether fe:16:3e:0c:65:73 brd ff:ff:ff:ff:ff:ff
>     inet6 fe80::fc16:3eff:fe0c:6573/64 scope link
>        valid_lft forever preferred_lft forever
> 15: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 500
>     link/ether fe:16:3e:7f:a2:d5 brd ff:ff:ff:ff:ff:ff
>     inet6 fe80::fc16:3eff:fe7f:a2d5/64 scope link
>        valid_lft forever preferred_lft forever
> 16: vnet2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 500
>     link/ether fe:16:3e:31:8f:7c brd ff:ff:ff:ff:ff:ff
>     inet6 fe80::fc16:3eff:fe31:8f7c/64 scope link
>        valid_lft forever preferred_lft forever
> 17: vnet3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 500
>     link/ether fe:16:3e:63:8c:e2 brd ff:ff:ff:ff:ff:ff
>     inet6 fe80::fc16:3eff:fe63:8ce2/64 scope link
>        valid_lft forever preferred_lft forever
> [root@openstack-node2 vlan]# brctl show
> bridge name    bridge id        STP enabled    interfaces
> br102        8000.fa163e54ea11    no        vlan102
>                             vnet0
>                             vnet1
>                             vnet2
> br103        8000.fa163e3aa020    no        vlan103
>                             vnet3
> virbr0        8000.525400aaa1b5    yes        virbr0-nic
>
> if the ip_forward=1, then vm1(vnet1) can ping vm2(vnet4) and controller
> can ping vm1(vnet1) and vm2(vnet4). this should be wrong.
>
> Any body meet this error? and how to fix this except for changing the
> code.
> --
> Lei Zhang
>
> Blog: http://jeffrey4l.github.com
> twitter/weibo: @jeffrey4l
>



-- 
Lei Zhang

Blog: http://jeffrey4l.github.com
twitter/weibo: @jeffrey4l