I've got a server and several client computers onsite. The client computers PXEBoot and get their / via NFS from the server. The server and clients are on limited battery backup, but the power goes out with some frequency due to factors beyond my control at this time. My problem is that when the power goes out, the server shuts down politely but the client machines do not.
I'm wondering, is there an existing elegant solution to getting the clients to shutdown before, or even just at the same time as the server? The clients only take seconds to shutdown, they can easily complete shutdown before the server does.
PS. Downtime isn't as big of a concern as a clean shutdown for these computers.