Thanks for the interest. Thus far just Linux, although a Windows machine is
waiting once any of this kind of works. The way I currently envisage it
(which could well change), there would be no forking vboxwrapper required.
Basically I modified the boot2docker ISO to act as "multi purpose app" (in
the language of http://boinc.berkeley.edu/trac/wiki/VboxApps) so on boot it
mounts shared/ and from there runs some boinc_app script. That script then
calls "docker run..." etc.. so its all happening inside the VM, the host
system never needs to interact directly with the docker daemon. It could
certainly be done other ways too though.

And agreed, the boot image size is very enticing. There is also the size of
the docker image that gets run, but there are decent to good base images in
the 5-100Mb range, and with this persistence thing working it would be a
one time download (and thank's to Docker, if you're running different
images all based on the same base image, you only download the changes).

Marius

On Thu, Jun 25, 2015 at 4:18 PM, Rom Walton <[email protected]> wrote:

> Marius,
>
> What host platform are you testing against?
>
> ----- Rom
>
> -----Original Message-----
> From: boinc_dev [mailto:[email protected]] On Behalf Of
> Rom Walton
> Sent: Thursday, June 25, 2015 5:43 PM
> To: Marius Millea <[email protected]>
> Cc: [email protected]
> Subject: Re: [boinc_dev] is there a way to persist files on the host
>
> Well, that is an interesting idea.
>
> Ultimately I think there will need to be a fork of vboxwrapper that knows
> how to handle the docker daemon as well as VirtualBox.
>
> A 27MB boot image is pretty enticing.
>
> ----- Rom
>
> From: Marius Millea [mailto:[email protected]]
> Sent: Thursday, June 25, 2015 4:43 PM
> To: Rom Walton <[email protected]>
> Cc: [email protected]
> Subject: Re: [boinc_dev] is there a way to persist files on the host
>
> Yea sorry ambiguous what I meant by host there. The idea is that BOINC
> clients are running VBoxwrapper which loads up boot2docker inside of which
> I run my Docker apps.
>
> Marius
>
> On Thu, Jun 25, 2015 at 1:38 PM, Rom Walton <[email protected]<mailto:
> [email protected]>> wrote:
> Hosts or guests?
>
> Using VirtualBox implies that your docker application would be running
> within a Linux guest.
>
> ----- Rom
>
> From: Marius Millea [mailto:[email protected]<mailto:[email protected]
> >]
> Sent: Thursday, June 25, 2015 4:10 PM
> To: Rom Walton <[email protected]<mailto:[email protected]>>
> Cc: [email protected]<mailto:[email protected]>
>
> Subject: Re: [boinc_dev] is there a way to persist files on the host
>
> Hi Rom,
>
> Yea, I think that's exactly what I'd need. I had started looking at the
> source for vboxwrapper, but if that's something you could add officially to
> BOINC then that'd be amazing, thanks!
>
> My end goal btw is to have hosts running Docker, and this would allow
> persisting images between tasks. We'll see if there's any other road
> blocks...
>
> Marius
>
>
>
>
>
> On Thu, Jun 25, 2015 at 12:25 PM, Rom Walton <[email protected]<mailto:
> [email protected]>> wrote:
> I can add another shared directory that points to a scratch area in the
> project's directory.
>
> Would that work for you?
>
> ----- Rom
>
> -----Original Message-----
> From: boinc_dev [mailto:[email protected]<mailto:
> [email protected]>] On Behalf Of Marius Millea
> Sent: Thursday, June 25, 2015 2:27 PM
> To: [email protected]<mailto:[email protected]>
> Subject: Re: [boinc_dev] is there a way to persist files on the host
>
> (sorry if this screws up the threading, I can't figure out how to reply to
> a specific message given I receive only the digest?)
>
>
> I see, that makes a lot of sense, thanks. I suppose a followup problem is
> that this is a VBox app, which AFAIK only gets access to the mounted
> shared/ folder. Is there any way around this?
>
> Marius
>
>
> The easiest way is to not tell BOINC about the file -
> > just create it in the project directory, and look for it there in
> > subsequent jobs.
> >
> > The app can get the project dir from the APP_INIT_DATA:
> > http://boinc.berkeley.edu/trac/wiki/StatusApi
> >
> > -- David
> >
> >
> > On 25-Jun-2015 2:10 AM, Marius Millea wrote:
> > > Suppose the result of a computation yields a large file which I
> > > would
> > like
> > >
> > > 1) to remain on host
> > > 2) to be used in subsequent computations
> > > 3) to not be uploaded
> > >
> > > I think I know how to do 1), if I have the file in the output
> > > template I can add the <copy_file> flag. Is there actually any way
> > > to do 2 or 3 though?
> > >
> > > Thanks,
> > >
> > > Marius
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