Jonathan Kamens wrote:
Greetings,
My company maintains Linux server appliances in the field at our client
sites. Our customer service is very high-touch -- when it's time to
upgrade the appliances, members of our client services team visit each
client in person and install the upgrade on-site. Our appliance
platform is RPM-based, and we distribute updates with yum, so "yum
update" is part of pretty much every client upgrade.
The problem we run into is that it can take upwards of an hour for all
of the RPMs to download before the upgrade actually starts. We'd
rather not have our client services team sitting around twiddling their
thumbs for an hour waiting for bits to download, so what we're like to
be able to do is to download all the RPMs in advance of the on-site
client upgrade visit. We'd like the process of doing this download to
be as straightforward as possible; in particular, we'd like our client
services folks to use yum for the download, just like they would use
yum for the update.
I know about yumdownloader, and it can certainly be made to download
packages, but it doesn't really have the "smarts" that we're looking
for -- it won't calculate which packages to download automatically a la
"yum update", and it won't put all the downloaded packages in the right
subdirectories of /var/cache/yum.
Therefore, to solve this problem, I came up with the following minimal
change to yum. It is very useful to us, and I think it will be
sufficiently useful to others that I'd like to ask you to consider
merging it into the mainline. The idea is simple: When "-D" is
specified on the command line, yum should stop what it's doing after
downloading but before installing. Our client services folks can thus
run "yum -D update" before going on-site, and then "yum update" when
they get there to do the upgrade.
The implementation is also simple :-). See the attached patch against
yum 3.2.0 (or at least the version of yum 3.2.0 that's in Fedora Core).
Thanks,
Jonathan Kamens
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There already exist a plugin in yum-utils called 'downloadonly' there
does exactly what you want, i make yum bail out when it have downloaded
the packages in the Transaction. The plugin add a '--downloadonly'
option to yum.
Tim
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