We have several mentions of problems with installing modules and updating NethServer on NEW installs. This is because CentOS has started to release CentOS7.7 packages in their CentOS 7 repository.
With CentOS 7.7 repo’s live it is necessary to do a
yum update nethserver-subscription nethserver-release nethserver-base
yum clean all
right after the initial wizard. Do NOT update through server manager before you have run the command mentioned above when you have installed a NEW server.
Even when you do this, some modules are installable and some not.
fail2ban, mysql (and so every module which depends on it) are not installable on a new install from iso 7.6
Error: Package: 1:mariadb-server-5.5.60-1.el7_5.x86_64 (ce-base)
Requires: mariadb-libs(x86-64) = 1:5.5.60-1.el7_5
Installed: 1:mariadb-libs-5.5.64-1.el7.x86_64 (@base)
mariadb-libs(x86-64) = 1:5.5.64-1.el7
Available: 1:mariadb-libs-5.5.60-1.el7_5.x86_64 (ce-base)
mariadb-libs(x86-64) = 1:5.5.60-1.el7_5
Error: Package: 1:mariadb-5.5.60-1.el7_5.x86_64 (ce-base)
Requires: mariadb-libs(x86-64) = 1:5.5.60-1.el7_5
Installed: 1:mariadb-libs-5.5.64-1.el7.x86_64 (@base)
mariadb-libs(x86-64) = 1:5.5.64-1.el7
Available: 1:mariadb-libs-5.5.60-1.el7_5.x86_64 (ce-base)
mariadb-libs(x86-64) = 1:5.5.60-1.el7_5
Error: Package: glibc-2.17-260.el7_6.6.i686 (ce-updates)
Requires: glibc-common = 2.17-260.el7_6.6
Installed: glibc-common-2.17-292.el7.x86_64 (@base)
glibc-common = 2.17-292.el7
Available: glibc-common-2.17-260.el7.x86_64 (ce-base)
glibc-common = 2.17-260.el7
Available: glibc-common-2.17-260.el7_6.3.x86_64 (ce-updates)
glibc-common = 2.17-260.el7_6.3
Available: glibc-common-2.17-260.el7_6.4.x86_64 (ce-updates)
glibc-common = 2.17-260.el7_6.4
Available: glibc-common-2.17-260.el7_6.5.x86_64 (ce-updates)
glibc-common = 2.17-260.el7_6.5
Available: glibc-common-2.17-260.el7_6.6.x86_64 (ce-updates)
glibc-common = 2.17-260.el7_6.6
Error: Package: systemd-python-219-62.el7_6.9.x86_64 (ce-updates)
Requires: systemd = 219-62.el7_6.9
Installed: systemd-219-67.el7_7.1.x86_64 (@updates)
systemd = 219-67.el7_7.1
Available: systemd-219-62.el7.x86_64 (ce-base)
systemd = 219-62.el7
Available: systemd-219-62.el7_6.2.x86_64 (ce-updates)
systemd = 219-62.el7_6.2
Available: systemd-219-62.el7_6.3.x86_64 (ce-updates)
systemd = 219-62.el7_6.3
Available: systemd-219-62.el7_6.5.x86_64 (ce-updates)
systemd = 219-62.el7_6.5
Available: systemd-219-62.el7_6.6.x86_64 (ce-updates)
systemd = 219-62.el7_6.6
Available: systemd-219-62.el7_6.7.x86_64 (ce-updates)
systemd = 219-62.el7_6.7
Available: systemd-219-62.el7_6.9.x86_64 (ce-updates)
systemd = 219-62.el7_6.9
Firewall-UI, NDPI, Proxy and Webfilter are installable.
What a mess… 
EDIT: cockpit an dante are also not installable. (conflict firewalld, device-mapper and glibc-common)
No, sorry. Same errors when try to install nethserver-cockpit or nethserver-mysql.
MySQL (mariadb) is not in the ISO. Why is it already installed on your testing system? It does not look like the bug scenario hit by Robb!
You missunderstood my post. It isn’t installed. If I try to install nethserver-mysql or a module which depends on it, I get an error. Also with nethserver-cockpit, but here it’s glibc, which causes the error.
Good morning @davidep ,
it’s when I try to install nethserver-cockpit .
The package is:
Package: glibc-2.17-260.el7_6.6.i686 (ce-updates)
Requires: glibc-common = 2.17-260.el7_6.6
Installed: glibc-common-2.17-292.el7.x86_64 (@base)Workaround fixed: please check it out!
No packages marked for update. => Think I have to wait for mirrors to sync.
Did you start from a clean 7.6 iso?
Yes, I did.
But I did a second rollback and tried it again and now it works. 
is there a known way to fix the situation without a complete reinstall after an update from the web server manager was already executed?
Maybe this can help…
Anyway: before act, consider a backup.
It did help thank you, don’t really mind about starting from scratch as it was a fresh install, i did read about this a little too late 
rolling back with yum history rollback N looks like did the trick anyway