I did it with thoses instructions from @esw and it worked flawlessly. Switch a test vm from C8 to RL8RC1 and it worked like a charm
rpm -e --nodeps centos-gpg-keys centos-linux-release centos-linux-repos
rpm -ivh \
https://download.rockylinux.org/pub/rocky/8.3/BaseOS/x86_64/os/Packages/rocky-release-8.3-11.el8.noarch.rpm \
https://download.rockylinux.org/pub/rocky/8.3/BaseOS/x86_64/os/Packages/rocky-repos-8.3-11.el8.noarch.rpm \
https://download.rockylinux.org/pub/rocky/8.3/BaseOS/x86_64/os/Packages/rocky-gpg-keys-8.3-11.el8.noarch.rpm
dnf distro-sync -y
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Hi,
I had one additional command for the transition to work, possibly because Iāve cpanel (dns-only) installed. Mainly use Centos for cpanel, so wanted to test if it works on a VM. Canāt install straight on to rocky, but converting cpanel seems to be working fine. I suspect my additional command probably isnāt recommended, but I seem to have astable system. Addtion is: rpm -e --nodeps --justdb glibc-static-2.28-127.el8.x86_64 and full list of commands is:
rpm -e --nodeps centos-gpg-keys centos-linux-release centos-linux-repos
rpm -ivh \
https://download.rockylinux.org/pub/rocky/8.3/BaseOS/x86_64/os/Packages/rocky-release-8.3-11.el8.noarch.rpm \
https://download.rockylinux.org/pub/rocky/8.3/BaseOS/x86_64/os/Packages/rocky-repos-8.3-11.el8.noarch.rpm \
https://download.rockylinux.org/pub/rocky/8.3/BaseOS/x86_64/os/Packages/rocky-gpg-keys-8.3-11.el8.noarch.rpm
rpm -e --nodeps --justdb glibc-static-2.28-127.el8.x86_64
dnf distro-sync -y
Reboot and all is good.
Thanks Tom.
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Good morning! Thanks for the great suggestions. I created a fully patched CentOS 8 VM on our vSphere 6.7U3 test cluster. I ran rossnickās script and everything looked great. However, on boot, Iām thrown into grub and the VM wonāt boot. If I force the VM into the EFI Boot Manager, I see an entry for Rocky Linux which points to (HD1,GPT,4ABā¦000)/\EFI\tocky\shimx64.efi. However, when I select that option, I just get the grub prompt. Any ideas? BTW, the root partition is LVM. Thanks for any advice!
Hi,
if you are just getting the grub-prompt, reinstalling grub from rescue mode from install iso/dvd; should fix:
Thanks Tom.
I have Centos7. I am trying to use Rocky Linux as a repository.
I have changed the url to point to the new location. A 1 line command . (below)
" sed -i ās+/mirror.centos.org/centos/7/updates/[$]basearch/+/springdale.princeton.edu/data/springdale/7/x86_64/os/Updates/+ā /etc/yum.repos.d/CentOS-Base.repo "
Although i can access the new link in a web browser. āyum updateā will not work.
I get 5 points of advice in the error message & 10 trys by i think the ācurlā command.
------------------------------------error message-start---------------------------------------------------------
http://springdale.princeton.edu/data/springdale/7/x86_64/os/Updates/repodata/repomd.xml: [Errno 14] curl#7 - āFailed to connect to 128.112.128.21: Network is unreachableā
.
.
.
ā¦Ten times repeated ā¦
------------------------------------error message-end---------------------------------------------------------
Is there a fix to run the āyum updateā command?
All help apreciated 
I just read in this thread that CTOS7 is still supported ā¦hmmmmm my Centos7 is not updating ā¦ I just replied to a post & i got the exact same error with the old centos url & as i did to the new url ā¦thus
" http://springdale.princeton.edu/data/springdale/7/x86_64/os/Updates/repodata/repomd.xml"
ā¦ so now i havenāt a clue ā¦error message ā¦
"[Errno 14] curl#7 - āFailed to connect to 128.112.128.21: Network is unreachableā
-bash: http://springdale.princeton.edu/data/springdale/7/x86_64/os/Updates/repodata/repomd.xml:: No such file or directory
"
any help much needed
thx Roger
UPDATE ā¦There was a routing problem ā¦a Reboot fixed it.
although with the new (rocky) url i get this ā¦
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
The GPG keys listed for the āCentOS-7 - Updatesā repository are already installed but they are not correct for this package.
Check that the correct key URLs are configured for this repository.
Failing package is: 32:bind-export-libs-9.11.4-26.P2.el7_9.5.x86_64
GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
FWIW ā¦original error ā¦
"http://mirror.centos.org/centos/7/updates/x86_64/repodata/repomd.xml: [Errno 14] curl#7 - āFailed to connect to 2402:1b80:0:2:0:6:3956:6: Network is unreachableā
"
THANKS, Tom!!! Rebuilding the grub.cfg file worked like a charm.
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With the 8.4 GA release this worked for me.
From Centos 8.4 to Rocky 8.4 GA.
dnf -y update
reboot
rpm -e --nodeps centos-gpg-keys centos-linux-release centos-linux-repos
rpm -ivh
https://download.rockylinux.org/pub/rocky/8.4/BaseOS/x86_64/os/Packages/rocky-release-8.4-26.el8.noarch.rpm
https://download.rockylinux.org/pub/rocky/8.4/BaseOS/x86_64/os/Packages/rocky-repos-8.4-26.el8.noarch.rpm
https://download.rockylinux.org/pub/rocky/8.4/BaseOS/x86_64/os/Packages/rocky-gpg-keys-8.4-26.el8.noarch.rpm
dnf distro-sync -y
reboot
Tested with a VM working as a webserver.
After migration webserver working correctly.
Check out the release notes for our release which note our conversion script. Happy hacking everyone!
Tested the migrate2rocky.sh script from the release notes .
Until now all VMās migrated succesfully to the GA release.
Thank you
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With RL8.3 on EFI machines, one needed to call grub2-mkconfig as the last step of the migration, before rebooting. See: [SOLVED] Grub prompt after CentOS 8 -> RL8 migration - #2 by knight-of-ni
Can anyone confirm whether this has been fixed in RL8.4?
For now, Iāll keep issuing grub2-mkconfig --output=/boot/efi/EFI/rocky/grub.cfg just in case.
Hi everyone,
I was going through the discussion about how to transit from CentOS 8 to Rocky and i believe itās an amazing job from the community. I know for now the project is mainly focused on the transition from CentOS 8 due to the time limiting but for my case i wanna transit from CentOS 7 directly to Rocky. Iām still not able to install my CentOS7-repos on Rocky through dnf/yum in that case.
The following errors arised as i was trying to install packages from my own CentOS7 repository mirrors:
Error:
Problem 1: cannot install both linux-firmware-20160830-49.git7534e19.el7.noarch and linux-firmware-20201218-102.git05789708.el8.noarch
- cannot install the best update candidate for package libertas-usb8388-firmware-2:20201218-102.git05789708.el8.noarch
- problem with installed package linux-firmware-20201218-102.git05789708.el8.noarch
Problem 2: package libidn2-2.3.1-1.el7.x86_64 requires libunistring.so.0()(64bit), but none of the providers can be installed- cannot install both libunistring-0.9.3-9.el7.x86_64 and libunistring-0.9.9-3.el8.x86_64
- cannot install the best update candidate for package libidn2-2.2.0-1.el8.x86_64
- problem with installed package libunistring-0.9.9-3.el8.x86_64
Any ideas/solutions/suggestions will be much appreciated. Thank you in advance.
hello @ magnas, your best bet is to upgrade your centos07 to 08 and then migrate to rocky linux
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I have a CentOS 8.4 system which is fully up-to-date. I have run the āmigrate2rocky.shā script as well as running joostfraās process with the āgrub2-mkconfig --output=/boot/efi/EFI/rocky/grub.cfgā command before the reboot. I end up getting stuck at the dracut prompt because the Volume Group cannot be found.
I successfully migrated a Centos 8.4 Stream system to Centos 8.4 system, then to a Rocky 8.4 system.
From memory, the steps were as follows:
Convert Centos stream to Centos
sudo dnf remove centos-release-stream
wget http://mirror.centos.org/centos/8/BaseOS/x86_64/os/Packages/centos-linux-release-8.4-1.2105.el8.noarch.rpm
wget http://mirror.centos.org/centos/8/BaseOS/x86_64/os/Packages/centos-linux-repos-8-2.el8.noarch.rpm
sudo rpm -e --nodeps centos-stream-release centos-stream-repos
sudo rpm -ivh centos-linux-release-8.4-1.2105.el8.noarch.rpm centos-linux-repos-8-2.el8.noarch.rpm
sudo dnf distro-sync --allowerasing
sudo reboot
Remove old repos
e.g. sudo rm yum.repos.d/CentOS-Linux-ContinuousRelease.repo etc etc
Then run the migrate to Rocky
e.g. sudo ./migrate2rocky.sh -V
sudo reboot
I too successfully transitioned a machine from Centos Stream 8.2 ā CentOS 8.4 ā Rocky 8.4.
The only thing I would add is that, upon installing centos-linux-repos, any additional centos repos you were using previously, such as powertools, go back to their default state, which is disabled.
This caused distro-sync to fail in my case because the packages I am using require powertools repo. Once I realized what happened and turned powertools back on, the upgrade went smoothly.
(Relayed from @nazunalika) This is expected behavior. Red Hat changed the names of the repos in 8.2. We canāt fix the āCentOSā Stream ā CentOS portion of such a conversion, but perhaps some logic can be implemented to take the repo name change into account in https://github.com/rocky-linux/rocky-tools/blob/main/migrate2rocky/migrate2rocky.sh for direct CentOS ā Rocky conversions.
Completely agree. My previous statement was not intended to imply something should be changed on the rocky linux side. Rather, it is simply a heads up to anyone doing a multi-step, unsupported upgrade such as the one Iainwhite and I took.
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