Here are some screenshots of my Cockpit cluster of three servers I personally maintain.
All servers are running the latest version of Fedora Server and Centos.
Here is the command I used to install all the Cockpit rpms on Fedora:
sudo dnf install cockpit-bridge \
cockpit-dashboard \
cockpit-networkmanager \
cockpit-packagekit \
cockpit-sosreport \
cockpit-storaged \
cockpit-system \
cockpit-ws \
cockpit-machines
Here is the command I used to install all the Cockpit rpms on Centos. These are the same rpms that I know worked on Fedora but assume they will be the same on Centos.
sudo yum install cockpit-bridge \
cockpit-dashboard \
cockpit-networkmanager \
cockpit-packagekit \
cockpit-sosreport \
cockpit-storaged \
cockpit-system \
cockpit-ws \
cockpit-machines