Official Base Containers, Application ContainersĬentOS Atomic Host is a lean operating system designed to run Docker containers, built from standard CentOS 7 RPMs, and tracking the component versions included in Red Hat Enterprise Linux Atomic Host. You can also download the files from a nearby mirror. The releases listed here are part of the Alternative Architecture Special Interest Group (AltArch SIG). You should always verify your downloads before using.īittorrent links are also available from the above links. You can also use the file located in any CentOS directory with ISO or Cloud images. Sha256sum information via an https source is provided in the Release Email or Release Notes link above. Making /etc/default/grub’s GRUB_DISTRIBUTOR like a fresh minimal CentOS7 install or that on the converted minimal CentOS7 box gave no relief.DVD and NetInstall images (including checksums) are available on mirrorsĭVD and NetInstall x86_64 images are available on mirrors ( checksums).ĭVD, Minimal, Everything, LiveGNOME, LiveKDE and NetInstall x86_64 images are available on mirrors ( checksums). os-release is really a file, not a symlink, so it’s not the tmpfiles.d snippet doing a bad thing. The #systemd cabal on IRC deny that it’s their offering that’s recreating this file, so I guess it’s some lingering chunk of RHEL that I can’t identify. This doesn’t happen on the minimal migrated box. I reinstalled the centos-release package a few times as well too, which wrote the right thing, but on each reboot the /etc/os-release file gets regenerated by something I can’t identify. Like you, I changed PRETTY_NAME back to “CentOS Linux 7 (Core)” from “Red Hat Enterprise Linux” in /etc/os-release and re-ran the grub mkconfig tool. Interestingly, a minimal RHEL7 VM converted to CentOS7 *does not* suffer from the same oddity, which probably accounts for what jensd sees in the original post. I’m getting the same thing here after converting a “more maximal” build of RHEL7 into a CentOS7 box. The other way around probably works in about the same way. The above steps should be all that is needed to convert RHEL7 to CentOS7. To be sure, we can check the release-information: ~]# cat /etc/*release Update the GRUB2-config to include the new information: ~]# grub2-mkconfig -o /boot/grub2/grub.cfgĭuring and after the reboot, you should have a CentOS-system :) Put yum in a clean, updated state: tmp]# yum clean tmp]# yum upgrade Install the download packages: tmp]# rpm -Uvh *.rpm Install the GPG-key: tmp]# rpm -import RPM-GPG-KEY-CentOS-7 Manually uninstall the rest to not have issues with dependencies: ~]# rpm -e -nodeps ~]# rpm -e -nodeps ~]# rpm -e -nodeps yumĪfter these steps, verify if everything has been removed: ~]# rpm -qa|egrep -i ~]#ĭelete some folders to prevent problems with message cpio: rename failed – Is a directory when ~]# rm -rf ~]# rm -rf /usr/share/redhat-release/ĭownload the CentOS GPG-key and package replacements for the previously removed packages: ~]# mkdir tmp & cd tmp]# curl -O tmp]# curl -O tmp]# curl -O tmp]# curl -O tmp]# curl -O Remove some of the above packages and dependencies with yum: ~]# yum remove rhnlib redhat-support-tool redhat-support-lib-python Red Hat Enterprise Linux Server release 7.0 (Maipo)Ĭheck which RHEL-related packages are installed: ~]# rpm -qa|egrep "rhn|redhat" REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux" REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7" PRETTY_NAME="Red Hat Enterprise Linux Server 7.0 (Maipo)"ĬPE_NAME="cpe:/o:redhat:enterprise_linux:7.0:GA:server" To migrate this system to CentOS, we need to perform the following steps:Ĭheck the currently installed version/release: ~]# cat /etc/*release We will start with a standard RHEL7 installation: For example to do some testing or as a staging platform for your production environment.Īt this time, CentOS 7 has just been released so there isn’t a lot of information available regarding the topic but by using instructions from previous releases, it’s doable :) It’s basically RHEL without logo’s, support and licensing.Ī good reason to do such migrations is when you want to legally and without limitations use a clone of a system that is running RHEL. CentOS uses the same package-source as RHEL and tries to be as close as it can be to Red Hat with their distribution. Therefor it’s much more handy when an in-place migration between the two can be done. While re-installing the OS and tranferring your files and settings is not undoable, it creates a lot of effort and possible chance for downtime. A migration from RHEL7 to CentOS7 could be something that is needed in certain cases.
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