CentOS - Dec 2011 - forcing yum to download but not install

Hey folks,

Is there any way to fake a "yum update" just to get yum to force a
download
of all the files it needs, without actually installing them.

I finally have a RPM cache/proxy working and I just want to populate it.
The server I want to actually update cannot be updated until tomorrow but
I'd like to do a fake update just to force the RPMs into my cache so they
will all be pre-downloaded.

I don't see anyway from the man page to do this.

thanks,
-Alan

-- 
?Don't eat anything you've ever seen advertised on TV?
         - Michael Pollan, author of "In Defense of Food"

You can use the yum download-only plugin, or you can enable a keep cache
variable in your /etc/yum.repos.d/yourfile.repo. Don't remember the syntax
off the top of my head. However a quick google search should turn them both
up.

Other option if you want to sync a repo you can check out an application
called cobbler.

On Mon, Dec 19, 2011 at 11:39 AM, Alan McKay <alan.mckay at gmail.com>
wrote:
> Hey folks,
>
> Is there any way to fake a "yum update" just to get yum to force
a download
> of all the files it needs, without actually installing them.
>
> I finally have a RPM cache/proxy working and I just want to populate it.
> The server I want to actually update cannot be updated until tomorrow but
> I'd like to do a fake update just to force the RPMs into my cache so
they
> will all be pre-downloaded.
>
> I don't see anyway from the man page to do this.
>
> thanks,
> -Alan
>
> --
> ?Don't eat anything you've ever seen advertised on TV?
>         - Michael Pollan, author of "In Defense of Food"
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
>


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2011/12/19 Alan McKay <alan.mckay at gmail.com>:
> Hey folks,
>
> Is there any way to fake a "yum update" just to get yum to force
a download
> of all the files it needs, without actually installing them.
>
> I finally have a RPM cache/proxy working and I just want to populate it.
> The server I want to actually update cannot be updated until tomorrow but
> I'd like to do a fake update just to force the RPMs into my cache so
they
> will all be pre-downloaded.
>
> I don't see anyway from the man page to do this.
You can use reposing tool for almost similar functionality..

--
Eero

On Mon, Dec 19, 2011 at 11:39 AM, Alan McKay <alan.mckay at gmail.com>
wrote:
> Hey folks,
>
> Is there any way to fake a "yum update" just to get yum to force
a download
> of all the files it needs, without actually installing them.
>
> I finally have a RPM cache/proxy working and I just want to populate it.
> The server I want to actually update cannot be updated until tomorrow but
> I'd like to do a fake update just to force the RPMs into my cache so
they
> will all be pre-downloaded.
>
> I don't see anyway from the man page to do this.
>
> thanks,
> -Alan
>
>
Why not just mirror the CentOS repo with rsync? You can have a script rsync
nightly so updates are ready to install when you need them. Additionally
your repo will be consistent with CentOS. If you use a proxy you could have
inconsistent results depending on the cache time to live.

Ryan

On Mon, Dec 19, 2011 at 10:39 AM, Alan McKay <alan.mckay at gmail.com>
wrote:
> Hey folks,
>
> Is there any way to fake a "yum update" just to get yum to force
a download
> of all the files it needs, without actually installing them.
Do a 'yum install yum-downloadonly', and then you can 'yum -y
--downloadonly update'.  This is also useful to prepare for where you
want to baby-sit an update but don't want to wait for the downloads to
happen.  A subsequent 'yum update' then goes very quickly.
> I finally have a RPM cache/proxy working and I just want to populate it.
Note that if you are using a squid or similar http proxy, it will work
to cache rpms as long as you have it configured to keep large files,
but if you don't modify each client you'll end up pulling a copy from
several different mirrors into your cache.

-- 
   Les Mikesell
     lesmikesell at gmail.com

Vreme: 12/19/2011 05:39 PM, Alan McKay pi?e:
> Hey folks,
>
> Is there any way to fake a "yum update" just to get yum to force
a download
> of all the files it needs, without actually installing them.
>
> I finally have a RPM cache/proxy working and I just want to populate it.
> The server I want to actually update cannot be updated until tomorrow but
> I'd like to do a fake update just to force the RPMs into my cache so
they
> will all be pre-downloaded.
>
> I don't see anyway from the man page to do this.
>
> thanks,
> -Alan
>
Let me let you on little secret. It seams nobody thought about it.

run "yum update" and wait until it downloads last package. then when
it
starts Transaction check just abort it with <Ctrl>+<C>. That will 
download all packages you need but will not install them. The next time 
you run update it will show them bold.

At this point you can even copy /var/cache/yum to be safe, but it should 
keep the packages until yum clean all or finish of yum update.

-- 

Ljubomir Ljubojevic
(Love is in the Air)
PL Computers
Serbia, Europe

Google is the Mother, Google is the Father, and traceroute is your
trusty Spiderman...
StarOS, Mikrotik and CentOS/RHEL/Linux consultant