Could Not Retrieve Mirrorlist

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xerceo
Posts: 3
Joined: 2021/09/16 13:17:28

Could Not Retrieve Mirrorlist

Post by xerceo » 2021/09/16 13:35:54

Hello, I am trying to execute a build script which fails with the following error:

Code: Select all

Determining fastest mirrors
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=container error was
12: Timeout on http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=container: (28, 'Resolving timed out after 30545 milliseconds')


 One of the configured repositories failed (Unknown),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

     3. Run the command with the repository temporarily disabled
            yum --disablerepo=<repoid> ...

     4. Disable the repository permanently, so yum won't use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

            yum-config-manager --disable <repoid>
        or
            subscription-manager repos --disable=<repoid>

     5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

            yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

Cannot find a valid baseurl for repo: base/7/x86_64
In a browser, a mirrorlist is returned just fine. But when I curl "http://mirrorlist.centos.org/?release=7 ... =container", I get "arch not specified" instead. I suspect this is at the heart of the problem but I am not sure why it is happening. Any insight into this?

Thanks.

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TrevorH
Site Admin
Posts: 33202
Joined: 2009/09/24 10:40:56
Location: Brighton, UK

Re: Could Not Retrieve Mirrorlist

Post by TrevorH » 2021/09/16 15:10:03

Resolving timed out after 30545 milliseconds
Something is wrong with your DNS resolution.
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

xerceo
Posts: 3
Joined: 2021/09/16 13:17:28

Re: Could Not Retrieve Mirrorlist

Post by xerceo » 2021/09/16 16:12:15

I receive responses for (and can ping) mirrorlist.centos.org with nslookup, and I am able to reach it in browser and with curl. I tried adding 8.8.8.8 as a nameserver to resolv.conf but the build still fails with the same error message. Is there anything else I can try DNS-wise?

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TrevorH
Site Admin
Posts: 33202
Joined: 2009/09/24 10:40:56
Location: Brighton, UK

Re: Could Not Retrieve Mirrorlist

Post by TrevorH » 2021/09/16 16:21:52

infra=container
Is it a container? Or a real system?
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

xerceo
Posts: 3
Joined: 2021/09/16 13:17:28

Re: Could Not Retrieve Mirrorlist

Post by xerceo » 2021/09/16 17:44:08

Actually, I was able to solve the issue. I should have specified but yes it is in a container, and that was the issue. I had added net.ipv4.ip_forward=1 to sysctl.conf but forgot to run systemctl restart network; it was able to build properly now. Apologies for not being clearer in the initial post. Thank you!

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