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Top Forums UNIX for Advanced & Expert Users emergency shutdown best practices. Post 302244746 by avronius on Wednesday 8th of October 2008 02:16:42 PM
Old 10-08-2008
If you have more than 15 minutes to plan for "emergency shut down" of your servers, I'd recommend:

1. All applications that are running have corresponding startup and shutdown scripts in rc.*
2. Identify the order that your hosts should be shutdown in - NIS or LDAP should shutdown last, NFS servers second last... NTP would go first...
3. Write scripts.
You need to send a wall to all users connected informing them of an impending outage.
You need to ensure that you send the right shutdown options to the right OS types.
You need to create for each command that you are sending - for audit and CYA purposes later.
4. Inform your business/clients/users that these are the "emergency shutdown" procedures. Get them to sign-off and buy into them. If they have special requirements, amend your policy to include those.

Ensure that you have adequate time to shutdown storage devices that may have a great deal of data in cache. Ensure that you have adequate time to shutdown tape storage systems, as the robotics may need more time to get to "home" than you might expect.

There is no shortage of things that you could do, but this should get you started.

Last edited by avronius; 10-08-2008 at 03:17 PM.. Reason: Grammer
 

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rpc_allow_remote_shutdown(3ncs) 										   rpc_allow_remote_shutdown(3ncs)

Name
       rpc_allow_remote_shutdown - allow or disallow remote shutdown of a server (server only)

Syntax
       #include <idl/c/rpc.h>

       void rpc_$allow_remote_shutdown(allow, checkproc, status)
       unsigned long allow;
       rpc_$shut_check_fn_t checkproc;
       status_$t *status;

Arguments
       allow		   A value indicating `false' if zero, `true' otherwise.

       checkproc	   A pointer to a Boolean function.

       status		   The completion status.  If the completion status returned in is equal to status_$ok , then the routine that supplied it
			   was successful.

Description
       The routine allows or disallows remote callers to shut down a server using

       By default, servers do not allow remote shutdown via If a server calls with allow true (not zero) and checkproc nil, then  remote  shutdown
       will be allowed.  If allow is true and checkproc is not nil, then when a remote shutdown request arrives, the function denoted by checkproc
       is called and the shutdown is allowed if the function returns true.  If allow is false (zero), remote shutdown is disallowed.

Diagnostics
       This section lists status codes for errors returned by this routine in

       rpc_$not_in_call    An internal error.

       rpc_$you_crashed    This error can occur if a server has crashed and restarted.	A client RPC runtime library sends the error to the server
			   if  the  client  makes  a  remote  procedure  call before the server crashes, then receives a response after the server
			   restarts.

       rpc_$proto_error    An internal protocol error.

Files
See Also
       intro(3ncs), rpc_shutdown(3ncs), rrpc_shutdown(3ncs)

														   rpc_allow_remote_shutdown(3ncs)
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