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Weird, as all CentOS machines under my control are suddenly giving the baseurl of Base repo not found error since this morning. Could be that mirrorlist is leading but all other options I found online to debug the error message seem to indicate that (un)commenting should fix it.

On 24-5-2015 14:10, Alexander Dalloz wrote:

Am 24.05.2015 um 13:45 schrieb Tim Semeijn:

...

Dear,

Recently I have noticed that on all my CentOS machines the CentOS-Base.repo file seems to have been modified resulting in all baseurl= lines being commented out.

That is the case for a very long time, even if it hasn't be the case all the time. Instead of baseurl the default is mirrorlist.

...

Did I miss something that was planned or is this a bug?

Best regards,

• -- Tim Semeijn

Alexander

_______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos

- -- Tim Semeijn Babylon Network pgp 0x5B8A4DDF

Am 24.05.2015 um 16:11 schrieb Johnny Hughes:

On 05/24/2015 07:48 AM, Tim Semeijn wrote:

...

Weird, as all CentOS machines under my control are suddenly giving the baseurl of Base repo not found error since this morning. Could be that mirrorlist is leading but all other options I found online to debug the error message seem to indicate that (un)commenting should fix it.

[ ... ]

If you have issues doing updates, I would first do "yum clean all" as root and try again. If that does not work make sure the server can get a list of mirrors from mirrorlist. If your machine does not have a browser, you can print the list in a terminal with:

curl "http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os"

Empty result.

If you can get a mirrorlist and you are getting errors still, then the issue has something to do with you yum connection to the mirrorlist servers. It could be proxy related, if you have a proxy . more info would be needed.

Hi Johnny,

I am getting the same problem with mirrorlist:

# LANG=C yum -d10 makecache Loading "fastestmirror" plugin Config time: 0.015 Running "init" handler for "fastestmirror" plugin Yum Version: 3.2.29 COMMAND: yum -d10 makecache Installroot: / Running "postreposetup" handler for "fastestmirror" plugin Loading mirror speeds from cached hostfile Error: Cannot find a valid baseurl for repo: base

Did run a "yum clean all" before.

]# LANG=C yum -d10 update Loading "fastestmirror" plugin Config time: 0.013 Running "init" handler for "fastestmirror" plugin Yum Version: 3.2.29 COMMAND: yum -d10 update Installroot: / Reading Local RPMDB rpmdb time: 0.001 Setting up Update Process Updating Everything Building updates object Setting up Package Sacks Running "postreposetup" handler for "fastestmirror" plugin Loading mirror speeds from cached hostfile Error: Cannot find a valid baseurl for repo: base

You CAN uncommnet the baseurl, but that is just one host, while mirrorlist gives you ten.

Something is screwed on the remote end.

Alexander

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It looks like the culprit is IPv6 according to a post on the CentOS Mirrors mailing list (http://lists.centos.org/pipermail/centos-mirror/2015-May/008847.html):

Hello,

mirrorlist.centos.org currently doesn't correctly answer on IPv6 - The request succeeds superficially (200 OK), but the answer is empty:

~ $ curl -6 "http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os" ~ $ curl -4 "http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os" http://mirror.ibcp.fr/pub/Centos/6.6/os/x86_64/ http://distrib-coffee.ipsl.jussieu.fr/pub/linux/centos/6.6/os/x86_64/

http://mirror1.babylon.network/centos/6.6/os/x86_64/

ftp://ftp.free.fr/mirrors/ftp.centos.org/6.6/os/x86_64/ http://centos.quelquesmots.fr/6.6/os/x86_64/ http://ftp.rezopole.net/centos/6.6/os/x86_64/ http://fr2.rpmfind.net/linux/centos/6.6/os/x86_64/ http://mirror.in2p3.fr/linux/CentOS/6.6/os/x86_64/ http://mirrors.ircam.fr/pub/CentOS/6.6/os/x86_64/ http://mirrors.atosworldline.com/public/centos/6.6/os/x86_64/ ~ $ curl -I -6 "http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os" HTTP/1.1 200 OK Server: nginx/1.0.15 Date: Sun, 24 May 2015 14:38:37 GMT Content-Type: text/plain Connection: keep-alive Content-Length: 0

~ $

Thanks for looking into it!

(Also, I wonder why the results don't contain centos.mirrors.ovh.net which should be closest - but that's another question for another time.)

Best regards, Felix Krohn

- -- Tim Semeijn Babylon Network pgp 0x5B8A4DDF

On 05/24/2015 10:00 AM, Alexander Dalloz wrote:

Am 24.05.2015 um 16:54 schrieb Tim Semeijn:

...

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It looks like the culprit is IPv6 according to a post on the CentOS Mirrors mailing list (http://lists.centos.org/pipermail/centos-mirror/2015-May/008847.html):

Bingo.

[root@msg ~]# curl -6 "http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os"; echo $? 0 [root@msg ~]# curl -4 "http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os"; echo $? http://ftp.wrz.de/pub/CentOS/6.6/os/x86_64/ ftp://mirror.fraunhofer.de/centos.org/6.6/os/x86_64/ http://mirror.eu.oneandone.net/linux/distributions/centos/6.6/os/x86_64/ http://centos.datente.com/media/6.6/os/x86_64/ http://mirror.skylink-datacenter.de/centos/6.6/os/x86_64/ http://mirror.softaculous.com/centos/6.6/os/x86_64/ http://mirror.netcologne.de/centos/6.6/os/x86_64/ http://ftp.fau.de/centos/6.6/os/x86_64/ http://mirror.23media.de/centos/6.6/os/x86_64/ http://mirror.jgotteswinter.com/centos/6.6/os/x86_64/ 0

IPv6 support is not always solid everywhere for us (as our mirrors are all donated) , we will troubleshoot as soon as we can.