How to upgrade dnf to el8 from el7 after upgrading Centos from 7 to 8 stream

Question

I have upgraded Centos 7 to Centos 8 accordingly this instruction https://techviewleo.com/how-to-convert-from-centos-to-centos-stream/.

Now I have some problems with installing some packeges.I would like to upgrade dnf version to el8. Current version is dnf-0:4.0.9.2-2.el7_9.noarch.

Yum has been deleted. dnf update dnf --best --allowerasing Result: rpmlib(RichDependencies) <= 4.12.0-1 is needed for some packeges. rpm --rebuilddb - doesn't help How can I upgrade dnf to el8?

Answer 1

I resolve this issue by execute the following command.

dnf upgrade rpm --releasever=8 --setopt=deltarpm=false --best --allowerasing

If there are some python2 conflicted packages, you need to upgrade them manually.

dnf remove python-zope-event-4.0.3-2.el7.noarch -y
dnf install -y python2-zope-component

This is not OK for openssl-libs, for rpm or dnf requires the old openssl11-libs to run.

dnf download openssl-libs
rpm2cpio openssl-libs-*.el8.x86_64.rpm | cpio -idmvD tmpdir
rpm -e --nodeps openssl11-libs
mv tmpdir/usr/lib64/* /usr/lib64/
dnf install -y openssl-libs