easy way to shut down a site

[dsschult]

We need an easy way to shut down a site from the server end, since often the person running the client can't be reached. Something server-side where if a certain client connects it gets rejected or sent 0 jobs.

[dsschult]

I had a thought - if we get automatic updating (#12) working we could just update the config file for that site to tell it not to queue any jobs.

[jvansanten]

That is one way to do it, but it clutters up the revision history with operations info. A lighter way to achieve the same thing would be make the server return an empty state if the client_id is on a server-side blacklist. Both approaches would only drain the banned site instead of shutting it down immediately, but that's probably better than nothing.

[vbrik]

Do we want to do this on the server side, or condor configuration of the central manager? (Or perhaps these are two different issues?) Perhaps using NEGOTIATOR_SLOT_CONSTRAINT or APPEND_REQUIREMENTS?

[dsschult]

If there's a way to tell the negotiator to stop matching a node, that would be great.

We also want something to stop the submission of new glideins, such as @jvansanten suggested in comment 3.