[CentOS] Local mirroring of the CentOS repos

Ross S. W. Walker rwalker at medallion.com
Wed Oct 10 18:47:07 UTC 2007

Kai Schaetzl wrote:
> I figured I try if I can mirror the base and updates repos locally. 
> There's no tutorial for that, only one about creating your 
> own repo of 
> packages which is not the same. So, I just mirrored all the 
> stuff with 
> wget and changed the baseurl in the repo files and hoped 
> that's enough. 
> Works. So easy you don't need a tutorial. 
> *But* I then realized that the updates directory contains 
> *all* updates, 
> not just the latest. Which means if I don't regularly check I 
> may get old 
> versions mirrored I don't want. It also means that I get a 
> lot of unwanted 
> files at the time I start to mirror. And I cannot delete old files as 
> these would again be mirrored in.
> An obvious solution would be to check each day and tell wget 
> (or whatever 
> software I use) to ignore files older than 24 hours. Still, 
> this means the 
> initial download has to get them all and I have to delete all 
> unwanted old 
> files manually.
> Is there a better solution?

Yes a lot of past versions are kept in the repo, but if you filter
those out then it wouldn't be a "mirror" then?

Be careful with the "repomd.xml" file, delete it before starting to
mirror to make sure it doesn't get out-of-sync, because, at least on
my end, I find that wget via http doesn't compare time stamps just
sizes/names and the sha1 checksums are always the same length.

Here's a little script:



mkdir -p /Software/CentOS/$VERSION/updates/i386 >/dev/null 2>&1
mkdir -p /Software/CentOS/$VERSION/updates/x86_64 >/dev/null 2>&1

rm -f /Software/CentOS/$VERSION/updates/i386/repodata/repomd.xml >/dev/null 2>&1
rm -f /Software/CentOS/$VERSION/updates/x86_64/repodata/repomd.xml >/dev/null 2>&1

wget -nH --cache=off --cut-dirs=4 -m -c -R gif,png,^index.html* -I ^/centos/$VERSION/updates/i386/ -P /Software/CentOS/$VERSION/updates/i386 http://mirror.centos.org/centos/$VERSION/updates/i386/
wget -nH --cache=off --cut-dirs=4 -m -c -R gif,png,^index.html* -I ^/centos/$VERSION/updates/x86_64/ -P /Software/CentOS/$VERSION/updates/x86_64 http://mirror.centos.org/centos/$VERSION/updates/x86_64/


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