Problem
The installation of the AdminDiary backend stalls for long time
Solution
Step 0
Abort the installation process through UMC
Step 1
Verify mysql/ mariadb server is installed.
root@master:~# dpkg -l | grep -E "maria|mysql"
[...]
ii mariadb-server-core-10.1 10.1.41-0+deb9u1 amd64 MariaDB database core server files
You see the server package “mariadb-server” but the integration package “univention-mariadb” is missing.
Step 2
Remove database server.
If not other app is using the mariadb server remove it. Otherwise perform a backup of the according database (ie with mysqldump).
root@master:~# apt remove mariadb-server
root@master:~# apt purge mariadb-server
root@master:~# univention-install univention-mysql
Step 3
Remove the half-installed AdminDiary app.
root@master:~# apt remove admindiary-backend
Step 4
Re-install database
root@master:~# univention-install univention-mariadb
Step 5
Re-Install AdminDiary
root@master:~# univention-app install admindiary-backend