Re: [MirageOS-devel] Monitoring MirageOS guests on CubieBoard2

[Dave Scott <Dave.Scott@xxxxxxxxxx>]

On 13 Jun 2014, at 08:33, buzz heavyyear <buzzheavyyear@xxxxxxxxxxx> wrote:

> Just a quick question to find out if RRD will make it into MirageOS 2.0, 
> especially for the ARM Cubieboard platform?

Let’s add “statistics reporting” to our to-do list — we’ve got various counters 
all over the place and John Else (cc:d) has a draft of a shared-memory protocol 
for sharing them.

Cheers,
Dave

> 
> Cheers
> Nick
> 
> > From: anil@xxxxxxxxxx
> > Date: Thu, 15 May 2014 11:21:18 +0100
> > To: Dave.Scott@xxxxxxxxxx
> > CC: mirageos-devel@xxxxxxxxxxxxxxxxxxxx
> > Subject: Re: [MirageOS-devel] Monitoring MirageOS guests on CubieBoard2
> > 
> > On 14 May 2014, at 17:41, Dave Scott <Dave.Scott@xxxxxxxxxx> wrote:
> > 
> > > 
> > > On 14 May 2014, at 17:21, Anil Madhavapeddy <anil@xxxxxxxxxx> wrote:
> > > 
> > >> On 14 May 2014, at 17:15, Jon Ludlam <jjl25@xxxxxxxxx> wrote:
> > >> 
> > >>> On 14/05/14 16:55, Anil Madhavapeddy wrote:
> > >>>> On 14 May 2014, at 16:47, Jon Ludlam <jjl25@xxxxxxxxx> wrote:
> > >>>>>> On 14/05/14 15:06, Anil Madhavapeddy wrote:
> > >>>>>>> On 14 May 2014, at 14:01, buzz heavyyear 
> > >>>>>>> <buzzheavyyear@xxxxxxxxxxx> wrote:
> > >>>>>>> 
> > >>>>>>> Now that I'm having a lot of fun getting up to speed with ocaml, 
> > >>>>>>> xen, mirage, writing ocaml guests and getting them to run on the 
> > >>>>>>> Cubieboard, what I really need is to see how they are performing as 
> > >>>>>>> they are running.
> > >>>>>>> 
> > >>>>>>> XAPI/XCP has rrd. Am I right in thinking that a good way forward is 
> > >>>>>>> to includegithub.com/xapi-project/xcp-rrd during the build process?
> > >>>>>>> 
> > >>>>>>> Perhaps there's an easier way? Any thoughts anyone?
> > >>>>>> RRD is definitely the right direction for dom0 to track guest 
> > >>>>>> activity, but we do need to get vchan up to speed from the guest 
> > >>>>>> side. Dave, Jon, what's the current state of ocaml-vchan? I'm happy 
> > >>>>>> to add a Cohttp functor for it if there's something vaguely 
> > >>>>>> resembling a FLOW interface (right now, it's fairly low level).
> > >>>>> I believe the state is 'I saw it work once recently'. There's nothing
> > >>>>> really resembling a flow interface, but I'm sure one could be 
> > >>>>> assembled
> > >>>>> fairly easily.
> > >>>> Thanks, is there a working unit test domain anywhere? If we're going 
> > >>>> to depend on vchan, it's time to get the low level bits well tested. 
> > >>>> The atomic bit ops particularly worrisome, and we are likely to be the 
> > >>>> first ARM vchan user (so let's get the x86 bugs sorted first :-)
> > >>>> 
> > >>>> Anil
> > >>>> 
> > >>>> 
> > >>> What I was using to test was the vchan client from the xen repository.
> > >>> I'll have another look at it tomorrow if you like?
> > >> 
> > >> Ah yes, I keep forgetting about those binaries from the Xen repo -- are 
> > >> they installed by distros these days? (so we have a netcat-like vchan 
> > >> client).
> > > 
> > > Good question. I need to take a look at vchan again, to see if it makes 
> > > sense to plumb a vchan link through to guests from the dom0 toolstack for 
> > > off-box cloud orchestration layers to talk to their service VMs without 
> > > using ssh. Perhaps little Mirage HTTP <-> vchan service would work nicely.
> > 
> > That would certainly cure the 'RPC through xenstore' malaise that afflicts 
> > everyone who has this problem.
> > 
> > More broadly, making vchan available with a convenient netcat-command-line 
> > interface would generally make interfacing with guests much more pleasant.
> > 
> > I notice that Arjun Guha has just started an OCaml Docker binding which 
> > will give us the same benefits using LXC, so making these interfaces 
> > similar for Xen would be very handy.
> > https://github.com/arjunguha/ocaml-docker
> > 
> > -anil
> > _______________________________________________
> > MirageOS-devel mailing list
> > MirageOS-devel@xxxxxxxxxxxxxxxxxxxx
> > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel


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