Problem: Dockerized App won't get Changes of environment

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/*