Hi Vratko,
> In my eyes, this e-mail thread contains two largely independent questions.
>
> The first question is how we can make stats available over a "wire".
> Remote user asks over the wire, the request is seen on VPP side of the wire
> as a byte sequence.
> Some (currently missing) VPP code parses that request,
> looks into the shared memory, and serializes the requested stats
> into a response (sequence of bytes), put to the wire for user to read from.
>
> Ssh + vpp_get_stats acts as a wire, but the format is human (not machine)
> friendly.
> Similarly to how CLI is less machine friendly than binary API.
>
> I expect the first implementation of machine friendly "stats over wire"
> to use Unix Domain Socket as the wire, just because VPP already has
> a dispatcher for handling binary messages of prescribed type there.
> Also, UDS has smaller overhead than other wires,
> especially if VPP is in a container.
>
> A sub-question is whether to support explicit polling,
> or subscribing for notifications (or both).
> In CSIT we want explicit polling.
>
> The second question is what wire is the best for stats transport.
> (And whether we should add support for more wire types.)
> > There's the (naive) prometheus example in the repo, vpp_get_stats,
> > there is a Telegraf plugin, a simple gNMI/gRPC plugin.
>
> I suspect the Prometheus example is for publish/subscribe,
> and vpp_get_stats is for explicit polling.
> Not sure about the others.
This should be done as an intermediate agent.
E.g. like:
https://github.com/vpp-telemetry-pfe/gnmi-grpc
Or the example Prometheus server.
I'd imagine both push and pull would have to be supported. But I don't think
this should go into the main VPP executable.
Best regards,
Ole
-=-=-=-=-=-=-=-=-=-=-=-
Links: You receive all messages sent to this group.
View/Reply Online (#15158): https://lists.fd.io/g/vpp-dev/message/15158
Mute This Topic: https://lists.fd.io/mt/69538850/21656
Group Owner: vpp-dev+ow...@lists.fd.io
Unsubscribe: https://lists.fd.io/g/vpp-dev/unsub [arch...@mail-archive.com]
-=-=-=-=-=-=-=-=-=-=-=-
