OpenStack Compute (nova)

Missing prmisc mode on VLAN bridge

Bug #1052776 reported by Jaroslav Pulchart
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
OpenStack Compute (nova)
Invalid
Low
Unassigned

Bug Description

Hello,

I experienced communication issue on VLAN network mode with multi_host = True. The instances cannot communicate through the network because VLAN bridge is not in PROMISC mode and it has associated IP address for nova-nework gateway.

ip a show br_vlan100
16: br_vlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
    link/ether ..... brd ff:ff:ff:ff:ff:ff
    inet aa.bb.xx.yy/zz brd ..... scope global br_vlan100
       valid_lft forever preferred_lft forever

Setting PROMISC mode on this interface fix the network traffic (fast fix at https://github.com/pulchart/nova/commit/0c86671d3f0e2ac4cae06a5e713584ee26724cec).

Regards,
Jaroslav

Revision history for this message
Chuck Short (zulcss) wrote :

Hi,

The git tree comes back as 404 can you attach the patch to this bug?

Thanks
chuck

Changed in nova:
importance: Undecided → Low
status: New → Incomplete
Revision history for this message
Jaroslav Pulchart (jaroslav-pulchart-4) wrote :

It was rebased so the previous link is invalid.

Patch attached.

Thierry Carrez (ttx)
Changed in nova:
status: Incomplete → Confirmed
Revision history for this message
OpenStack Infra (hudson-openstack) wrote : Fix proposed to nova (master)

Fix proposed to branch: master
Review: https://review.openstack.org/18722

Changed in nova:
assignee: nobody → Davanum Srinivas (dims-v)
status: Confirmed → In Progress
Davanum Srinivas (DIMS) (dims-v)
Changed in nova:
status: In Progress → Confirmed
assignee: Davanum Srinivas (dims-v) → nobody
Revision history for this message
Davanum Srinivas (DIMS) (dims-v) wrote :

Jaroslav Pulchart,

Here's some feedback from code review by Nathanael I Burton on Dec 28

"I've never needed to put the vlan bridge in PROMISC mode with VlanManager. Are we sure this is a bug and/or necessary?"

Can you please confirm that you still need this work around / patch?

Changed in nova:
status: Confirmed → Incomplete
Revision history for this message
Jaroslav Pulchart (jaroslav-pulchart-4) wrote :

Hello Davanum Srinivas

yes we are using this patch in our environment. Without it network doesn't works. Do you use multi_host = True, where IP address is associated with the bridge?

Jaroslav

Giampaolo Lauria (lauria)
Changed in nova:
status: Incomplete → New
melanie witt (melwitt)
Changed in nova:
status: New → Confirmed
Revision history for this message
Sean Dague (sdague) wrote :

Long old incomplete bug, probably should be set invalid. We possibly need local switch config information for why this option seems needed in jaroslav's environment.

Changed in nova:
status: Confirmed → Invalid
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