Problem
After changes in the environment (eg. new dns, backup2master,…) the changes seems to negatively effecting the App. Either it won’t run at all or has major dysfunctions.
Solution
Check the settings of the dockerized App
root@ucs:~# univention-app shell <APPID>
root@docker-app:~# ucr dump | less
You either might correct the settings with obsolete values or just rejoin the container, if it is a UCS based AppBox.
root@docker-app:~# univention-join
You should also search for any occurrence of the old values
root@docker-app:~# ucr search --brief --value <OLD_VALUE> root@docker-app:~# rgrep "<OLD_VALUE>" /etc/*