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Hi Rajeev,

The Chain Monitoring is the missing piece in networking-sfc . Vikram and
myself were discussed to introduce "SFC Manager" [1] (basically OAM tool )
few cycle before.

It'll continuously monitor an existing SFC chain,  when any SF VM goes down
or any packet drop. It'll trigger alert and capture corresponding logs .
But we haven't started any implementation on this. Feel free to discuss
with community, IMO  this feature will be great addition to networking-sfc

[1]  https://bugs.launchpad.net/networking-sfc/+bug/1513368
<https://bugs.launchpad.net/networking-sfc/+bug/1513368>

IRC: #networking-sfc
Weekly Meeting:
https://wiki.openstack.org/wiki/Meetings/ServiceFunctionChainingMeeting

Thanks.,
Mohankumar.N







On Thu, Jul 27, 2017 at 11:30 AM, rajeev.satyanarayana at wipro.com <
rajeev.satyanarayana at wipro.com> wrote:

> Hi Igor/Cathy/Gord,
>
>
>
> Sorry for the delay in replying.
>
>
>
> As part of monitoring the SFC, I think maintaining the details of “Number
> of flows assigned to a given SFC”, “Number of packets/bytes dropped/hit due
> to the policies at each Service Function entry/exit points or for the
> entire SFC” would be good to start with. I feel based on some of these
> details, an operator can know how much the virtual switch is loaded and
> take a call on whether to add a new SFC, or it could even help during
> debugging which service function has exactly caused the disruption to SFC.
>
> As a first step, I think it would be good to add meters to provide “number
> of packets/bytes hit due to policy at the ingress and egress of the entire
> SFC” and to realize that, we would need to add specific pollsters. We can
> use neutron_client API to fetch the ingress and egress port details and
> fetch the corresponding flows for those specific ports(also get flow_infos
> from flow_classifier and then use them to dump_flows matching those
> flow_infos) and fetch the no.of packets hit due to policy from them.
>
>
>
> I have just mentioned my idea on this. Can I please know your opinion on
> this and provide your comments?
>
>
>
> Thanks and Regards,
>
> Rajeev.
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