Apologize for having sent this question to a dev mailing list first! But I
humbly request to continue the discussion here.
My VM is connect to a private network under demo project, here is the info of
the network:
$ openstack network show 64f4f4dc-a851-486a-8789-43b816d9bf3d
+---------------------------+----------------------------------------------------------------------------+
| Field | Value
|
+---------------------------+----------------------------------------------------------------------------+
| admin_state_up | UP
|
| availability_zone_hints |
|
| availability_zones | nova
|
| created_at | 2018-06-15T04:26:18Z
|
| description |
|
| dns_domain | None
|
| id | 64f4f4dc-a851-486a-8789-43b816d9bf3d
|
| ipv4_address_scope | None
|
| ipv6_address_scope | None
|
| is_default | None
|
| is_vlan_transparent | None
|
| mtu | 1450
|
| name | private
|
| port_security_enabled | True
|
| project_id | e202899d90ba449d880be42f19cd6a55
|
| provider:network_type | vxlan
|
| provider:physical_network | None
|
| provider:segmentation_id | 72
|
| qos_policy_id | None
|
| revision_number | 4
|
| router:external | Internal
|
| segments | None
|
| shared | False
|
| status | ACTIVE
|
| subnets | 18a0847e-b733-4ec2-9e25-d7d630a1af2f,
91e91bab-7405-4717-97cd-4ca2cb11589d |
| tags |
|
| updated_at | 2018-06-15T04:26:23Z
|
+---------------------------+----------------------------------------------------------------------------+
And below is the full output of ovs bridges.
$ sudo ovs-vsctl show
0ee72d8a-65bc-4c82-884a-61b0e86b9893
Manager "ptcp:6640:127.0.0.1"
is_connected: true
Bridge br-int
Controller "tcp:127.0.0.1:6633"
is_connected: true
fail_mode: secure
Port "qvo97604b93-55"
tag: 1
Interface "qvo97604b93-55"
Port int-br-ex
Interface int-br-ex
type: patch
options: {peer=phy-br-ex}
Port "qr-c3f198ac-0b"
tag: 1
Interface "qr-c3f198ac-0b"
type: internal
Port "sg-8868b1a8-69"
tag: 1
Interface "sg-8868b1a8-69"
type: internal
Port br-int
Interface br-int
type: internal
Port "qvo6f012656-74"
tag: 1
Interface "qvo6f012656-74"
Port "fg-c4e5dcbc-a3"
tag: 2
Interface "fg-c4e5dcbc-a3"
type: internal
Port "tap10dc7b3e-a7"
tag: 1
Interface "tap10dc7b3e-a7"
type: internal
Port patch-tun
Interface patch-tun
type: patch
options: {peer=patch-int}
Port "qg-4014b9e8-ce"
tag: 2
Interface "qg-4014b9e8-ce"
type: internal
Port "qr-883cea95-31"
tag: 1
Interface "qr-883cea95-31"
type: internal
Port "sg-69c838e6-bb"
tag: 1
Interface "sg-69c838e6-bb"
type: internal
Bridge br-tun
Controller "tcp:127.0.0.1:6633"
is_connected: true
fail_mode: secure
Port "vxlan-c0a81218"
Interface "vxlan-c0a81218"
type: vxlan
options: {df_default="true", in_key=flow,
local_ip="192.168.20.132", out_key=flow, remote_ip="192.168.18.24"}
Port br-tun
Interface br-tun
type: internal
Port patch-int
Interface patch-int
type: patch
options: {peer=patch-tun}
Bridge br-ex
Controller "tcp:127.0.0.1:6633"
is_connected: true
fail_mode: secure
Port phy-br-ex
Interface phy-br-ex
type: patch
options: {peer=int-br-ex}
Port "eno2"
Interface "eno2"
Port br-ex
Interface br-ex
type: internal
ovs_version: "2.8.0"
Thanks!
Best Regards,
Dave Chen
-----Original Message-----
From: Slawomir Kaplonski [mailto:skapl...@redhat.com]
Sent: Friday, June 15, 2018 5:43 PM
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [neutron] Question on the OVS configuration
Please send info about network to which You vm is connected and config of all
bridges from ovs also.
> Wiadomość napisana przez dave.c...@dell.com w dniu 15.06.2018, o godz. 11:18:
>
> Thanks Slawomir for your reply, so what's the right configuration if I want
> my VM could be able to access external with physical NIC "eno2"? Do I still
> need add that NIC into "br-ex"?
>
>
> Best Regards,
> Dave Chen
>
> -----Original Message-----
> From: Slawomir Kaplonski [mailto:skapl...@redhat.com]
> Sent: Friday, June 15, 2018 5:09 PM
> To: OpenStack Development Mailing List (not for usage questions)
> Subject: Re: [openstack-dev] [neutron] Question on the OVS
> configuration
>
> Hi,
>
> If You have vxlan network than traffic from it is going via vxlan tunnel
> which is in br-tun bridge instead of br-ex.
>
>> Wiadomość napisana przez dave.c...@dell.com w dniu 15.06.2018, o godz. 10:17:
>>
>> Dear folks,
>>
>> I have setup a pretty simple OpenStack cluster in our lab based on devstack,
>> couples of guest VM are running on one controller node (this doesn’t looks
>> like a right behavior anyway), the Neutron network is configured as OVS +
>> vxlan, the bridge “br-ex” configured as below:
>>
>> Bridge br-ex
>> Controller "tcp:127.0.0.1:6633"
>> is_connected: true
>> fail_mode: secure
>> Port phy-br-ex
>> Interface phy-br-ex
>> type: patch
>> options: {peer=int-br-ex}
>> Port br-ex
>> Interface br-ex
>> type: internal
>> ovs_version: "2.8.0"
>>
>>
>>
>> As you see, there is no external physical NIC bound to “br-ex”, so I guess
>> the traffic from the VM to external will use the default route set on the
>> controller node, since there is a NIC (eno2) that can access external so I
>> bind it to “br-ex” like this: ovs-vsctl add-port br-ex eno2. now the “br-ex”
>> is configured as below:
>>
>> Bridge br-ex
>> Controller "tcp:127.0.0.1:6633"
>> is_connected: true
>> fail_mode: secure
>> Port phy-br-ex
>> Interface phy-br-ex
>> type: patch
>> options: {peer=int-br-ex}
>> *Port "eno2"*
>> Interface "eno2"
>> Port br-ex
>> Interface br-ex
>> type: internal
>> ovs_version: "2.8.0"
>>
>>
>>
>> Looks like this is how it should be configured according to lots of
>> wiki/blog suggestion I have googled, but it doesn’t work as expected, ping
>> from the VM, the tcpdump shows the traffic still go the “eno1” which is the
>> default route on the controller node.
>>
>> Inside of VM
>> ubuntu@test-br:~$ ping 8.8.8.8
>> PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
>> 64 bytes from 8.8.8.8: icmp_seq=1 ttl=38 time=168 ms
>> 64 bytes from 8.8.8.8: icmp_seq=2 ttl=38 time=168 ms …
>>
>> Dump the traffic on the “eno2”, got nothing $ sudo tcpdump -nn -i
>> eno2 icmp
>> tcpdump: verbose output suppressed, use -v or -vv for full protocol
>> decode listening on eno2, link-type EN10MB (Ethernet), capture size
>> 262144 bytes …
>>
>> Dump the traffic on the “eno1” (internal NIC), catch it!
>> $ sudo tcpdump -nn -i eno1 icmp
>> tcpdump: verbose output suppressed, use -v or -vv for full protocol
>> decode listening on eno1, link-type EN10MB (Ethernet), capture size
>> 262144 bytes
>> 16:08:59.609888 IP 192.168.20.132 > 8.8.8.8: ICMP echo request, id
>> 1439, seq 1, length 64
>> 16:08:59.781042 IP 8.8.8.8 > 192.168.20.132: ICMP echo reply, id
>> 1439, seq 1, length 64
>> 16:09:00.611453 IP 192.168.20.132 > 8.8.8.8: ICMP echo request, id
>> 1439, seq 2, length 64
>> 16:09:00.779550 IP 8.8.8.8 > 192.168.20.132: ICMP echo reply, id
>> 1439, seq 2, length 64
>>
>>
>> $ sudo ip route
>> default via 192.168.18.1 dev eno1 proto static metric 100 default
>> via 192.168.8.1 dev eno2 proto static metric 101
>> 169.254.0.0/16 dev docker0 scope link metric 1000 linkdown
>> 172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1
>> linkdown
>> 192.168.8.0/24 dev eno2 proto kernel scope link src 192.168.8.101
>> metric 100
>> 192.168.16.0/21 dev eno1 proto kernel scope link src
>> 192.168.20.132 metric 100
>> 192.168.42.0/24 dev br-ex proto kernel scope link src 192.168.42.1
>>
>>
>> What’s going wrong here? Do I miss something? Or some service need to be
>> restarted?
>>
>> Anyone could help me out? This question made me sick for many days! Huge
>> thanks in the advance!
>>
>>
>> Best Regards,
>> Dave
>>
>> _____________________________________________________________________
>> _ ____ OpenStack Development Mailing List (not for usage questions)
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>
> —
> Slawek Kaplonski
> Senior software engineer
> Red Hat
>
>
> ______________________________________________________________________
> ____ OpenStack Development Mailing List (not for usage questions)
> Unsubscribe:
> openstack-dev-requ...@lists.openstack.org?subject:unsubscribe
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—
Slawek Kaplonski
Senior software engineer
Red Hat
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