log file location r/w test when applying a config

Dear all,

 due to complaints from our admins, I have tried to redirect the log output to a dedicated file

  CVMFS_USYSLOG=/path/to/log

on the node, CVMFS went into an unhealthy state as I forgot to make the target dir writable for cvmfs:cvmfs :-/

In principle, cvmfs was up, but mounting any repos failed and chksetup mentioned no errors.

Suggestion: adding a small test to chksetup ensuring that the log path is writable and else throw an error

Cheers,

  Thomas

btw: I am looking for a recipe to query a "consolidated" CVMFS status overview in journald.
I.e., I have individual mount units for the repos and as well as a generic var-cache-cvmfs2 mount unit, but I am looking for a way, to get all the CVMFS related info in one go (as in the syslog pipe though), so that ideally I can pick these up as JSONs to forward them into the message system.
Do you know, if something like that would be possible - probably with a dedicated target?

Cheers and thanks

  Thomas