We are doing some more experimentation with our cluster setup over the coming days/weeks. Due to this, the cluster might be down/unreachable occasionally. Since we already have an app running on our current cluster that takes care of authenticating users, this means that during any such outage, logging into the forums will be impossible.
That said, if you are already logged into the forums, that should not be a problem. And even if you are not: We’ll do our best to keep outages as short and as infrequent as possible 
The fun of experimenting with live systems! 