CentOS - Jun 2019 - Own CentOS MirrorList

Hi Guys

Apologies in advance for the noise.

I am interested in setting up my OWN mirrorlist  like
http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock
where it pulls a few local mirrors,  but mine would be statically set with 3 or
4 different location URL's

Basically my plan here is,  if the closest mirror I operate cannot be reached,
it will try another mirror from a different geographic location

I was wondering if anybody on-list might be able to provide some insight on how
I can accomplish this? And use ?release=  and &arch=  and &repo=  ?

Any assistance would be greatly appreciated.

Cheers

D

On 10/06/2019 09:10, Daniel Watson wrote:
> Hi Guys
> 
> Apologies in advance for the noise.
> 
> I am interested in setting up my OWN mirrorlist  like
http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock
where it pulls a few local mirrors,  but mine would be statically set with 3 or
4 different location URL's
> 
> Basically my plan here is,  if the closest mirror I operate cannot be
reached, it will try another mirror from a different geographic location
> 
> I was wondering if anybody on-list might be able to provide some insight on
how I can accomplish this? And use ?release=  and &arch=  and &repo=  ?
> 
> Any assistance would be greatly appreciated.
> 
> Cheers
> 
> D
> 
in your centos repo file, add a mirrorlist line pointing to your 
mirrorlist file. For example:

mirrorlist=http://my-mirrors.example.com/my-centos-mirrors.el7

and then populate my-centos-mirrors.el7 with your chosen list of mirrors:

$ cat my-centos-mirrors.el7

http://my-mirror.example1.com/centos/el7/$basearch/
http://my-mirror.example2.com/centos/el7/$basearch/
http://my-mirror.example3.com/centos/el7/$basearch/

You _may_ also need to remove the baseurl line too, not sure.

You can probably achieve a similar effect without the mirrorlist plugin 
by simply specifying multiple baseurl's. For example:

baseurl=http://my-mirror.example1.com/centos/el7/$basearch/
	http://my-mirror.example2.com/centos/el7/$basearch/
	http://my-mirror.example3.com/centos/el7/$basearch/

Hope that helps.

Phil

On Mon, 10 Jun 2019, Daniel Watson wrote:
>I am interested in setting up my OWN mirrorlist like 
>http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock
>where it pulls a few local mirrors, but mine would be statically set 
>with 3 or 4 different location URL's
There isn't much magic to the response, it is a list of sources for the 
specified repository (sample below).  You might look at the MirrorBrain 
project, though likely it is overkill and you can just use trivial 
server-side code (e.g., PHP or Node.js) for the index that inspects the 
provided parameters (release, arch, etc.) and responds with the related 
list of statically defined mirror URLs (perhaps randomized) or a subset 
if large.  The CentOS project provides a subset of their 600+ mirrors, 
typically 10, and sorted in a preference and geographic order as closely 
matching the origin of the request as makes sense (sample below from 
west coast of the us).  You might do similar even if your list is short, 
when the east coast makes the request you send the list with the URLs 
for east coast servers first but when the west coast requests the list 
has west coast servers first.  If you want the name 
mirrorlist.centos.org to lead to your mirrorlist provider then you need 
to arrange for the name to resolve to your servers -- I suggest at least 
two but perhaps more if you have a good deal of diversity -- or perhaps 
look into using Spacewalk.

   $ curl
'http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock'
   http://mirrors.xtom.com/centos/7.6.1810/os/x86_64/
   http://mirror.scalabledns.com/centos/7.6.1810/os/x86_64/
   http://sjc.edge.kernel.org/centos/7.6.1810/os/x86_64/
   http://linux.mirrors.es.net/centos/7.6.1810/os/x86_64/
   http://mirror.hostduplex.com/centos/7.6.1810/os/x86_64/
   http://mirrors.ocf.berkeley.edu/centos/7.6.1810/os/x86_64/
   http://centos.mirror.ndchost.com/7.6.1810/os/x86_64/
   http://repos.lax.quadranet.com/centos/7.6.1810/os/x86_64/
   http://repos-lax.psychz.net/centos/7.6.1810/os/x86_64/
   http://mirrors.oit.uci.edu/centos/7.6.1810/os/x86_64/

Which is pretty clear, but just in case I'll diagram the dynamic 
portions using the final result (monospace font):

     arch ---------------------------------------v
     repo ------------------------------------v
     release ------------------------v
   http://mirrors.oit.uci.edu/centos/7.6.1810/os/x86_64/


/mark