Re: [vdsm] how engine get files from node???

On 09/24/2012 02:46 PM, Ryan Harper wrote:
>  * Sheldon <shaohef(a)linux.vnet.ibm.com&gt; [2012-09-24 06:50]:
> > On 09/21/2012 08:14 PM, Laszlo Hornyak wrote:
> >>
> >> ----- Original Message -----
> >>> From: "Sheldon" <shaohef(a)linux.vnet.ibm.com&gt;
> >>> To: vdsm-devel(a)lists.fedorahosted.org
> >>> Sent: Friday, September 21, 2012 11:42:05 AM
> >>> Subject: [vdsm]  how engine get files from node???
> >>>
> >>>
> >>> Hi all,
> >>> I have submitted a patch about watchdog device
> >>> http://gerrit.ovirt.org/#/c/7535/
> >>> If we set 'dump' action for watchdog, qemu will generate a dump
> file.
> >>> And I have get some feedback, how engine get these files?
> >> When adding the host (if installation is enabled) the engine does some ssh/scp to
> the new host, but this can be turned off. Also, the guideline is to have a single
> interface with the host, and after installation the engine does not try to communicate
> with vdsm in any other way than the xmlrpc interface.
> >
> > do you means "ssh/scp" may not be available on host, So a xmlrpc
> > interface should be added to get the files on host?
>
>  ssh/scp is available, but requires user authentication.  We already have
>  one entry point into the node, the VDSM API, which is currently running
>  over XMLRPC, so, instead of attempting to coordinate additional users
>  and authenication, provide a way to programatically get at the data via
>  XMLRPC. 
is this needed by the engine interactively, or just for log colleciton?
logs/cores/dumps are collected today by the log collector utility, based 
on ssh/scp leveraging sos.
but this isn't "engine getting logs", rather a stand alone utility for 
collecting them.
is the file needed by engine for some flow, or just log collection for 
user benefit?

> >
> >>> scp? or Will vdsm support new API to list and get these files?
> >>> IMO, The new API should list and get not only dump files, but also
> >>> other kinds of files.
> >>>
> >>>
> >>> --
> >>> Sheldon Feng <shaohef(a)linux.vnet.ibm.com&gt; IBM Linux Technology Center
> >>> _______________________________________________
> >>> vdsm-devel mailing list
> >>> vdsm-devel(a)lists.fedorahosted.org
> >>> https://lists.fedorahosted.org/mailman/listinfo/vdsm-devel
> >>>
> >
> >
> > --
> > Sheldon Feng(?????????)&lt;shaohef(a)linux.vnet.ibm.com&gt;
> > IBM Linux Technology Center
>