How to move graylog_journal to new location? (Docker environment)

[schneich (Chris)]

This discussion implies that you cannot rename the folder?

Ran out of disk, now "Failed to acquire lock on file .lock"

I have confirmed only one instance of Graylog is running. And using lsof I have confirmed that no other process is using the .lock file. The journal directory is not on its own disk partition. But that reminded me of something I read in my prior research: someone mentioned that having any extra files in the journal folder would cause this error. I didn’t have any extra files, but I did rename the journal folder as a test. Graylog starts up correctly now. So now the question becomes: how can I…

I did rename the folder, which persists data of graylog…

Well, renaming the folder back did not help. I get the feeling, this might have something todo wich access reights. I read a lot about graylog user 1100. This user does not exist in my host. Do I have to create it manually and provide access to the specific folders? What ID, Name and Group(s) do I have to set up? How do I do that on a Ubuntu Terminal?