[Users] forced shutdown with client agent

[Thomas Scofield]

I have run into a scenario after installing the client agent.  If a VM is
shutdown, the client agent calls the shutdown command with a 1 minute
timeout.

Dummy-2::INFO::2013-03-28 14:05:21,892::vdsAgentLogic::138::root::Shutting
down (timeout = 30, message = 'System Administrator has initiated shutdown
of this Virtual Machine. Virtual Machine is shutting down.'

Since the shutdown command is called with time parameter the VM sets the
/etc/nologin file. When the VM is forced down the /etc/nologin file is not
cleared and when it comes back up only root can login until the
/etc/nologin file is cleared.

Is their some some reason the shutdown time is set to 30 seconds (rounded
up to 1 minute in the code)?  Are there any know issues with setting this
to 0?

Is this the right way to change it to 0?
psql engine postgres -c "update vdc_options set option_value = '0' where
option_name = 'VmGracefulShutdownTimeout';"
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