11:33 a.m.
----- Original Message -----
From: "Alon Bar-Lev" <alonbl(a)redhat.com>
To: "Federico Simoncelli" <fsimonce(a)redhat.com>
Cc: "Nir Soffer" <nsoffer(a)redhat.com>, "devel"
<devel(a)ovirt.org>, "李建盛" <jiansheng.li(a)eayun.com>, "Lucas
Vandroux"
<lucas.vandroux(a)eayun.com>, "Liron Aravot" <laravot(a)redhat.com>,
"潘礼洋" <liyang.pan(a)eayun.com>, "Michal Skrivanek"
<mskrivan(a)redhat.com>
Sent: Monday, December 15, 2014 6:15:53 PM
Subject: Re: [ovirt-devel] UI Plugin to Upload ISO Files
----- Original Message -----
> From: "Federico Simoncelli" <fsimonce(a)redhat.com>
> To: "Alon Bar-Lev" <alonbl(a)redhat.com>
> Cc: "Nir Soffer" <nsoffer(a)redhat.com>, "devel"
<devel(a)ovirt.org>, "李建盛"
> <jiansheng.li(a)eayun.com>, "Lucas Vandroux"
> <lucas.vandroux(a)eayun.com>, "Liron Aravot"
<laravot(a)redhat.com>, "潘礼洋"
> <liyang.pan(a)eayun.com>, "Michal Skrivanek"
> <mskrivan(a)redhat.com>
> Sent: Monday, December 15, 2014 7:09:11 PM
> Subject: Re: [ovirt-devel] UI Plugin to Upload ISO Files
>
> ----- Original Message -----
> > From: "Alon Bar-Lev" <alonbl(a)redhat.com>
> > To: "Nir Soffer" <nsoffer(a)redhat.com>
> > Cc: "devel" <devel(a)ovirt.org>, "李建盛"
<jiansheng.li(a)eayun.com>, "Lucas
> > Vandroux" <lucas.vandroux(a)eayun.com>, "Liron
> > Aravot" <laravot(a)redhat.com>, "潘礼洋"
<liyang.pan(a)eayun.com>, "Michal
> > Skrivanek" <mskrivan(a)redhat.com>
> > Sent: Monday, December 15, 2014 5:52:36 PM
> > Subject: Re: [ovirt-devel] UI Plugin to Upload ISO Files
> >
> > ----- Original Message -----
> > > From: "Nir Soffer" <nsoffer(a)redhat.com>
> > > To: "Alon Bar-Lev" <alonbl(a)redhat.com>
> > > Cc: "Itamar Heim" <iheim(a)redhat.com>, "devel"
<devel(a)ovirt.org>, "Lucas
> > > Vandroux" <lucas.vandroux(a)eayun.com>, "李建盛"
> > > <jiansheng.li(a)eayun.com>, "潘礼洋"
<liyang.pan(a)eayun.com>, "Michal
> > > Skrivanek"
> > > <mskrivan(a)redhat.com>, "Liron Aravot"
> > > <laravot(a)redhat.com>
> > > Sent: Monday, December 15, 2014 6:47:44 PM
> > > Subject: Re: [ovirt-devel] UI Plugin to Upload ISO Files
> > >
> > > ----- Original Message -----
> > > > From: "Alon Bar-Lev" <alonbl(a)redhat.com>
> > > > To: "Itamar Heim" <iheim(a)redhat.com>
> > > > Cc: "devel" <devel(a)ovirt.org>, "Lucas
Vandroux"
> > > > <lucas.vandroux(a)eayun.com>,
> > > > "李建盛" <jiansheng.li(a)eayun.com>, "潘礼洋"
> > > > <liyang.pan(a)eayun.com>, "Michal Skrivanek"
<mskrivan(a)redhat.com>
> > > > Sent: Sunday, December 14, 2014 11:47:26 PM
> > > > Subject: Re: [ovirt-devel] UI Plugin to Upload ISO Files
> > > >
> > > >
> > > > using ssh and/or nfs to send artifacts to hosts is something we
> > > > should
> > > > avoid
> > > > so using iso/image uploader tools are not a solution.
> > > > vdsm should support uploading images using its own protocol based on
> > > > the
> > > > authentication between engine and vdsm, is it already?
> > >
> > > Vdsm does support upload over http/https directly to storage.
> > >
> > > This feature is used to store ovf backups on storage domains, and
> > > probably
> > > not very efficient, but may be good enough for now.
> > >
> > > See vdsm/rpc/BindingXMLRPC.py (do_PUT)
> >
> > thanks.
> > I hear this function is not supported by the new jsonrpc, nor will it be
> > supported when messaging will be used... so not sure if it is a good idea
> > to
> > add functionality on top of this one.
>
> The format (xmlrpc/jsonrpc) here is not much interesting, the interesting
> part is the transport. In fact current download/uploadImage uses REST
> GET/PUT for downloading/uploading the images (only the errors/messages are
> reported with xmlrpc or eventually they could be reported with jsonrpc).
>
> By design they were not mixed with the other control APIs (because it's
> not control, it's data). And indeed it cannot be transported with
> messaging.
>
> Uploading/dowloading data to/from the host involves a data transport
> (and http REST is the most commonly used). Which is exactly what you
> need here, and it was in fact designed for this use case.
there are plans to use messaging/broker to access hosts.
this should abstract the physical location of the host.
using direct connection to host in addition to broker is something that
should be avoided.
Agreed, although when we discussed how to coherently move large data
from/to the hosts it became obvious that messaging/broker is not the
right tool.
once solution may be to obtain connection information from the
control
channel, but one of the "problems" that will nice to be solved is to stop
initiating connections from manager.
Retrieving/pushing the REST GET/PUT endpoints from the control path
was exactly what we had in mind. WRT the direction I have no preference
(even though at the moment it's from manager to host and for simplicity
I wouldn't change it right away).
I am not sure if the current implementation is misleading but the fact
that download/uploadImage are something that don't belong to the control
path (regular APIs) should be clear for everyone.
--
Federico