Yum updates for CentOS by OpenLogic fails on Microsoft Azure

Question

Earlier today I made a fresh install of CentOS in Azure from images provided by OpenLogic.

When I try to update the system with yum update, I get:

Loaded plugins: security
http://olcentgbl.trafficmanager.net/centos/6/os/x86_64/repodata/repomd.xml: [Errno 14]     PYCURL ERROR 6 - "Couldn't resolve host 'olcentgbl.trafficmanager.net'"
Trying other mirror.
http://olcentgbl.trafficmanager.net/centos/6/extras/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'olcentgbl.trafficmanager.net'"
Trying other mirror.

..and two more...

Setting up Update Process
No Packages marked for Update

Has the hostname changed or is it temporarily unavailable?

Regards Niklas

Solution

The error you recieve is because (as mentioned) the domain does not exist. I tried resolving the domain and it seems not to be working. Since this is a Windows Azure image it might be prefferable to ask their support what the new Centos Base repo mirror is. Or that you manually change it via /etc/yum.repos.d/CentOS-Base.repo file.

A sample one:

[base]
name=CentOS-$releasever - Base
mirrorlist=http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

to be sure. Copy the file that you have to file.bak

edit the first file and change to a mirror close to your "cloud" server.

http://www.centos.org/download/mirrors/

Found another good source :)

http://www.openlogic.com/azure/azure-centos-62-update-instructions/

A quick last comment;

Depending on packages installed and versions thereof you should be very careful, the resource you are trying to update from does not exist anymore, I would first check with Openlogic on what the REPO url is. Then check with the internal Azure support. In the third step I would switch out the repo for the real clean ones provided by CentOS but this can have unforeseen consequences.

Comments

[Xiao]

check this: serverfault.com/questions/481501/…

[Niklas]

'yum clean all' doesn't help. The only difference is that I get this message instead: "yum update Loaded plugins: security olcentgbl.trafficmanager.net/centos/6/os/x86_64/repodata/…: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'olcentgbl.trafficmanager.net'" Trying other mirror. Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again"

[Xiao]

You should check its answer You can replace their yum configuration files (in the /etc/yum.repos.d directory) with ones from a standard CentOS system