[node-devel] Using yum in Node

[Mike Burns]

On Mon, 2012-05-21 at 09:06 -0400, Andrew Cathrow wrote:
> 
> ----- Original Message -----
> > From: "Mike Burns" <mburns at redhat.com>
> > To: "Fabian Deutsch" <fabiand at redhat.com>
> > Cc: node-devel at ovirt.org
> > Sent: Monday, May 21, 2012 8:56:27 AM
> > Subject: Re: [node-devel] Using yum in Node
> > 
> > On Mon, 2012-05-21 at 09:50 +0200, Fabian Deutsch wrote:
> > > Hey,
> > > 
> > > yum landed in node quite recently - not in the official build, but
> > > in
> > > gerrit [0].
> > > It's somewhat tricky to get it working, I added a small section to
> > > the
> > > Node troubleshooting wiki page [1] to give other a better start.
> > 
> > Just for clarity, this is being done to support plugins.  It will
> > only
> > be supported offline when using the edit-node functionality.
> > 
> 
> Obviously the reason for this is not for users to have yum available for use on the node when it's deployed but it's going to cause confusion with users that they have utilities like yum and rpm and can't use them, or if they try to things fail in strange ways.
> 
> If we don't want or support runtime use of rpm and yum then having them in the node and available to be called is asking for trouble.
> Having docs that explain why it failed and why they shouldn't be doing it isn't enough.

The plan to mitigate this issue is that the yum binary will be relocated
to either a non-standard place that isn't in the path (/usr/libexec) or
renamed to something else non-standard (ovirt-yum or something).
The /usr/bin/yum executable will instead print a message/warning to the
user that says the running yum in unsupported on a running host.  The
offline edit-node process will call the renamed or relocated yum script
correctly.

The only other options we have are to go down a path where we end up
having to handle all the dependency solving ourselves rather than
leverage something that already exists or have people provide fully
functional and already resolved packages for installation.  I don't see
either of those as good options.  

Mike  

> 
> 
> > Mike
> > 
> > > 
> > > Greetings
> > > fabian
> > > 
> > > [0] http://gerrit.ovirt.org/#change,4522
> > > [1] http://ovirt.org/wiki/Node_Troubleshooting#Using_yum
> > > _______________________________________________
> > > node-devel mailing list
> > > node-devel at ovirt.org
> > > http://lists.ovirt.org/mailman/listinfo/node-devel
> > 
> > 
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