Rudder

Follow up error from #17873; hence I closed it.

Workaround:

rudder:~ # cp /opt/rudder/share/package-scripts/rudder-webapp-postinst .
rudder:~ # vi ./rudder-webapp-postinst
rudder:~ # diff -u /opt/rudder/share/package-scripts/rudder-webapp-postinst ./rudder-webapp-postinst
--- /opt/rudder/share/package-scripts/rudder-webapp-postinst    2020-06-16 16:19:16.000000000 +0200
+++ ./rudder-webapp-postinst    2020-07-01 15:44:42.351803455 +0200
@@ -38,7 +38,7 @@
 fi

 if getent group ncf-api-venv >/dev/null; then
-  groupdel --system ncf-api-venv >> ${LOG_FILE}
+  groupdel ncf-api-venv >> ${LOG_FILE}
 fi

 echo " Done" 
rudder:~ # 
rudder:~ # ./rudder-webapp-postinst false apache2
INFO: Creating groups ... Done
INFO: Creating users ... Done
INFO: Removing ncf-api-venv user and group ... Done
INFO: Setting up systemd ...INFO: Restarting rudder-slapd... Done
INFO: Launching script to check if a migration is needed ...
Done
INFO: Re-generate rudder-lang libraries ...
Done
INFO: Make sure Rudder webapp is started... Done
INFO: Make sure Apache HTTPd is started... Done
rudder:~ #