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07-22-2009

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Netdump over bonded interface ?

Netdump over bonded interface ?
Hey there,..
I have heard from admins, that netdump usually fails over a bonded network interface.

I have written a multi-OS checkdump script , which checks if the respective crashdump utility on corresponding OS is correctly configured, space is available, etc etc etc.

For the netdump check, I wanted to add in a check to see if netdump is using bonded interface . How do I do that ? I can easily find out if the system has bonding enabled or if bond0 is up or down .
But I want to know if Netdump is going to use this bonded interface to send out the dump, or the usual interface ?

/etc/sysconfig/netdump doesnt give much of an idea. Does LOCALPORT setting have something to do with it ? It defaults to 6666.
I have minimal understanding about the networking side of this problem, could some one please tell me :
1. How do I find out which network interface (outgoing) netdump is currently configured to use ? How to check if its bonded or not ??

2. I also wanted to do a ethtool $NIC to check if the ethernet link is
down or up, so this brings back to finding out which network interface is used by netdump , eth0 , eth1 , bond0 ??? How can I find this out.

Thanks,
Shrikant

shriyer

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LEARN ABOUT REDHAT

netdump-server

NETDUMP-SERVER(8)						  System Programs						 NETDUMP-SERVER(8)

NAME

       netdump-server - handle crash dumps over the network

SYNOPSIS

       netdump-server [--port portnumber]
		[--concurrent number]
		[--pidfile path]
		[--daemon]
		[--help] [--usage]

DESCRIPTION

       Listens	to  the network for clients that crashes and uses the netdump protocol to recieve a memory dump and a stack trace. The memory dump
       and oops message are stored in a timestamped directory in /var/crash.  The server can also run scripts when some events happen.

OPTIONS

       --port portnumber
	      Specifies the IP port number for the netdump server to listen to.  The default is 6666.

       --concurrent number
	      You can limit the amount of concurrent dumps being done at any one time. If more clients than the specified maximum connects at  one
	      time the last ones will just be logged and then rebooted.

       --pidfile path
	      Store a pidfile.	The default service uses /var/run/ttywatch.pid.  The default is not to write a pidfile.

       --daemon
	      ttywatch should background itself and run as a daemon.

EXAMPLES

       netdump-server --daemon
       This launches the netdump-server and puts it in the background, listening for crashed clients.

EXIT STATUS

       Exit status is 0 for a clean exit and non-0 for a non-clean exit.

FILES

       /etc/netdump.conf
	      A  configuration	file  read  by netdump-server on startup. It is a "key=value" style file. Currently it supports the options: port,
	      max_concurrent_dumps, daemon and pidfile.

       /etc/init.d/netdump-server
	      An init script to start a default system installation of netdump-server.	This is normally turned off by default; use the command
	      /sbin/chkconfig netdump-server on
	      to enable the netdump-server service.

       /var/crash
	      The main directory where the crash dump files are stored. Each dump is put in a subdirectory  named  with  the  ip  of  the  crashed
	      machine and the date and time of the crash.

       /var/crash/scripts
	      This  directory  can contain scripts that are run at various times.  They all get passed the ip of the crashing machine as the first
	      argument, and each one except netdump-start gets the directory that the dump is written into as the second argument.

	      netdump-start - This is called when a client connects to the server to tell it that it has just started  the  netdump  client.  This
	      normally means that the machine just booted up.

	      netdump-crash  -	This  is  run  when a client reports that it has crashed.  If it returns a non-zero value the dump request will be
	      ignored and the client will be told to reboot immediately

	      netdump-nospace - This is run when there is not enough diskspace for the dump of the crashed machine. If this script  exits  with  a
	      non-zero return value netdump-server will try once again (but only once) before giving up the dump. If this script exits with a zero
	      return value, netdump-server will reboot the client without performing a dump.

	      netdump-reboot - This is run when netdump-server is finished with a client and is about to tell the client to reboot itself.

SEE ALSO

       netdump(8)

BUGS

       Report any bugs you find to http://bugzilla.redhat.com/bugzilla

AUTHOR

       Alexander Larsson <alexl@redhat.com>

Linux								    14 Feb 2002 						 NETDUMP-SERVER(8)