CentOS Stream 9 CRB repository is the name of the repository, which replaces the old CentOS Stream 8 PowerTools repository.
When installing packages from community official or other repositories they may depend on packages in CRB repositories, but because it is not enabled by default, there will be a nasty error of broken dependencies like:
Error: Problem: cannot install the best candidate for the job - nothing provides python3-pyxattr needed by glusterfs-server-11.0-2.el9s.x86_64 from centos-gluster11-test (try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)
The package glusterfs-server-11.0-2.el9s.x86_64 needs the package python3-pyxattr, which cannot be found in all the enabled repositories on the system, so it appears the system is broken.
So the python3-pyxattr is part of the CRB repository so just enabling it will solve the problem:
[root@srv ~]# dnf config-manager --set-enabled crb [root@srv ~]# dnf install -y glusterfs-server CentOS Stream 9 - BaseOS 198 kB/s | 9.5 kB 00:00 CentOS Stream 9 - AppStream 26 kB/s | 10 kB 00:00 CentOS Stream 9 - CRB 8.0 MB/s | 5.4 MB 00:00 Dependencies resolved. ========================================================================================================================= Package Architecture Version Repository Size ========================================================================================================================= Installing: glusterfs-server x86_64 11.0-2.el9s centos-gluster11-test 1.2 M Installing dependencies: attr x86_64 2.5.1-3.el9 baseos 61 k device-mapper-event x86_64 9:1.02.195-1.el9 baseos 33 k device-mapper-event-libs x86_64 9:1.02.195-1.el9 baseos 32 k device-mapper-persistent-data x86_64 0.9.0-13.el9 baseos 782 k glusterfs-cli x86_64 11.0-2.el9s centos-gluster11-test 185 k glusterfs-client-xlators x86_64 11.0-2.el9s centos-gluster11-test 785 k glusterfs-fuse x86_64 11.0-2.el9s centos-gluster11-test 136 k glusterfs-selinux noarch 2.0.1-1.el9s centos-gluster11 29 k libaio x86_64 0.3.111-13.el9 baseos 24 k libgfapi0 x86_64 11.0-2.el9s centos-gluster11-test 95 k libgfchangelog0 x86_64 11.0-2.el9s centos-gluster11-test 34 k lvm2 x86_64 9:2.03.21-1.el9 baseos 1.5 M lvm2-libs x86_64 9:2.03.21-1.el9 baseos 1.0 M python3-pyxattr x86_64 0.7.2-4.el9 crb 35 k rpcbind x86_64 1.2.6-5.el9 baseos 58 k Transaction Summary ========================================================================================================================= Install 16 Packages Total download size: 6.0 M ..... ..... python3-pyxattr-0.7.2-4.el9.x86_64 rpcbind-1.2.6-5.el9.x86_64 Complete!
Listing packages of the CRB repository is simple enough.
[root@srv ~]# dnf repository-packages crb list Last metadata expiration check: 1:26:16 ago on Mon 19 Jun 2023 12:50:59 PM UTC. Installed Packages python3-pyxattr.x86_64 0.7.2-4.el9 @crb Available Packages CUnit-devel.i686 2.1.3-25.el9 crb CUnit-devel.x86_64 2.1.3-25.el9 crb Judy-devel.i686 1.0.5-28.el9 crb Judy-devel.x86_64 1.0.5-28.el9 crb LibRaw-devel.i686 0.20.2-6.el9 crb LibRaw-devel.x86_64 0.20.2-6.el9 crb ..... .....
Apparently, CentOS Stream 9 installation should include EPEL and CRB repositories in addition to the base ones.
Almost half of the files are developments files (i.e. “-devel”) packages and others are additional libraries, mainly Python 3 and Perl modules, OpenJDK 17, 11, 1.8.0 slow debug and fast debug, and more.