[CentOS] Re: Linux backup help

Amos Shapira amos.shapira at gmail.com
Fri Nov 14 22:32:48 UTC 2008


What about disaster recovery?
Assuming I take the approach you suggest and have to restore the cache
(with the tested versions) after it's lost in a disaster, is there a
way to do that (short of backing it up)? I'd  rather be able to keep a
list of package versions instead of having to move around entire cache
backups across continents.

Thanks,

--Amos

On 11/15/08, Warren Young <warren at etr-usa.com> wrote:
> Amos Shapira wrote:
>> Is there a way to "freeze" a list of installed packages and exact
>> versions, then tell yum (or any other tool/script) to install exactly
>> these verions either on the same or another systme?
>
> There isn't a need for an explicit feature.  Just update one server,
> test it, then copy all of /var/cache/yum/updates/packages to the other
> machines.  You can then say "rpm -Fvh *.rpm" in that directory to bring
> that machine up to the same level as the other one.
>
> We don't do it exactly that way.  We copy the current package cache to
> new machines after installation to speed a regular "yum update," as it
> needs only enough bandwidth to download what's changed since updating
> the package cache clone.  Because of CentOS/RHEL's policy of not
> upgrading versions, only patching the released version, we haven't had
> any serious problems by allowing production systems to track the current
> yum repositories.
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