Hello Philippe,

AlmaLinux is not officialy supported at the moment, it will be for the 22.04 next month :)

But you can already install a 21.10 version of Centreon on AlmaLinux, the Centreon Repositories EL8 are common on all Entreprise Linux 8 flavor:

dnf install -y https://yum.centreon.com/standard/21.10/el8/stable/noarch/RPMS/centreon-release-21.10-5.el8.noarch.rpm

And for the additionnal repo:

dnf install -y dnf-plugins-core
dnf install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
dnf install -y https://rpms.remirepo.net/enterprise/remi-release-8.rpm
dnf config-manager --set-enabled 'powertools'