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Special Forums IP Networking app to broadcast availability to ethernet? Post 302307127 by sneakyimp on Tuesday 14th of April 2009 04:25:51 PM
Old 04-14-2009
app to broadcast availability to ethernet?

I'm working on a queue manager type application. I'd like to be able to delegate a large job constituted of many smaller task to a handful (or potentially dozens) of commodity linux machines on a LAN. It is quite likely this LAN will be ethernet but it might end up being Fibre Channel or Infiniband. I expect I'll be using TCP for all communication between nodes because it's been implemented on all of these network technologies and results in reliable, point-to-point data transmission.

HOWEVER -- and this is the real question here -- I'd like to be able to attach a new machine to the network and have it notify the other machines that it is available to work on these tasks. At the very least it must notify the queue manager. I know how this would be done if the new node was aware which ip was the queue manager or if the queue manager knows the network address of the new node. Is there a way to do it without specifically apprising the computers of each other's presence? I.e., can they just 'find each other' ?
 

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CHECK_GEARMAN(8)					  System Administration Utilities					  CHECK_GEARMAN(8)

NAME
check_gearman - Nagios service check to monitor the gearman job server DESCRIPTION
usage: check_gearman [ -H=<hostname>[:port] ] [ -t=<timeout> ] [ -w=<jobs warning level> ] default: 10 [ -c=<jobs critical level> ] default: 100 [ -W=<worker warning level> ] default: 25 [ -C=<worker critical level> ] default: 50 [ -q=<queue> ] to send a test job: [ -u=<unique job id> ] default: check [ -s=<send text> ] [ -e=<expect text> ] [ -a send async ] will ignore -e [ -h print help ] [ -v verbose output ] [ -V print version ] - You may set thresholds to 0 to disable them. - Thresholds are only for server checks, worker checks are availability only perfdata format when checking job server: |'queue waiting'=current waiting jobs;warn;crit;0 'queue running'=current running jobs 'queue worker'=current num worker;warn;crit;0 Note: set your pnp RRD_STORAGE_TYPE to MULTIPLE to support changeing numbers of queues. see http://docs.pnp4nagios.org/de/pnp-0.6/tpl_custom for detailed information perfdata format when checking mod gearman worker: |worker=10 jobs=1508c Note: Job thresholds are per queue not totals. EXAMPLES
Check job server: %>./check_gearman -H localhost -q host check_gearman OK - 0 jobs running and 0 jobs waiting. Version: 0.14|'host_waiting'=0;10;15;0 'host_running'=0 'host_worker'=3;5;10;0 Check worker: %> ./check_gearman -H <job server hostname> -q worker_<worker hostname> -t 10 -s check check_gearman OK - host has 5 worker and is working on 0 jobs|worker=5 jobs=96132c SEE ALSO
The Mod Gearman documentation is available in /usr/share/doc/mod-gearman/README.html check_gearman 1.3.6-1 July 2012 CHECK_GEARMAN(8)
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