I’m installing OOD 4.0.8 and encountering various issues (the previous version I installed was v2). I’m pretty much following the instructions from Requirements — Open OnDemand 4.0.0 documentation with only chances being my specific log in set up (which I am copying from the earlier installation which has been working great for years).
One issue was "Bad Request Unregistered redirect_uri" from Dex with LDAP - #28 by jeff.ohrstrom which I solved by adding apache to /etc/shadow with pwck since adding it to /etc/security/access.conf did not work (I would have commented this fact in that conversation, but unfortunately it’s closed).
Now I’m able to login, but immediately after I get a Service Unavailable message with no other explanation (and no option to do anything else)
Of course I did not schedule a maintenance, nor there is any capacity problem since the hardware has plenty of memory, compute capacity and it’s on a private network where only I have access (for now).
I’m trying to figure out what may be causing this, and reading the logs would be the best way for me to proceed. However I can’t find them anywhere. The only thing vaguely close to “logs” is the directory /var/log/ondemand-nginx/ which is empty 
Maybe I need to enable logging somewhere in /etc/ood/config/ood_portal.yml ?