Tested on two servers - one firewall/gateway (vmware) and one mail/app server (proxmox), both updates worked without errors and everything seems to work properly.
@mark_nl, I did a test on a raspberry 4 and it worked. I used the centos image for raspi 4. I worked around the key problems with disabling gpg check.
yum install http://mirror.nethserver.org/nethserver/7.7.1908/arm-base/armhfp/Packages/nethserver-release-7-14.ns7.noarch.rpm
nethserver-install
nethserver-cockpit does not install because it requires nethserver-subscription and that requires puppet-agent which is not available, see also Nethserver on Raspberry Pi
Error: Package: nethserver-subscription-3.5.0-1.ns7.noarch (nethserver-updates)
Requires: puppet-agent
Puppet-agent runs with rvm ruby 2.4 and a patch but I don’t know how to make a package out of it and if it’s really necessary.
Source: