Am 20.11.18 um 08:35 schrieb Bernd: > Am 2018-11-20 08:06, schrieb Ulrich Windl: >>>>> Bernd <be...@kroenchenstadt.de> schrieb am 20.11.2018 um 07:21 in >>>>> Nachricht >> <dbae607c63168d4e14584abfba0b4...@kroenchenstadt.de>: >>> Hi, >>> >>> I'd like to run a certain bunch of cronjobs from time to time on the >>> cluster node (four node cluster) that has the lowest load of all four >>> nodes. >>> >>> The parameters wanted for this system yet to build are >>> >>> * automatic placement on one of the four nodes (i.e., that with the >>> lowest load) >>> >>> * in case a node fails, automatically removed from the cluster >>> >>> * it must only exist a single entity of the cronjob entity running >>> >>> so this really screams for pacemakter being used as foundation. >>> >>> However, I'm not sure how to implement the "put onto node with least >>> load" part. I was thinking to use Node Attributes for that, but I >>> didn't >>> find any solution "out of the box" for this. Furthermore, as load is a >>> highly volatile value, how can one make sure that all cronjobs are run >>> to the end without being moved to a node that possibly meanwhile got a >>> lower load than the one executing the jobs? >> >> Hi! >> >> Actually I think the last one is the easiest (assuming the cron jobs >> do not need any resources that are moved): Once a cron job is started, >> it will run until it ends, whether it's crontab has been moved or not. >> >> Despite of that I think cluster software is not ideal when you >> actually need load-balancing software. >> >> Regards, >> Ulrich > > The only resource(s) existing would be the cron "runner". > > The point about load balancing is true, yes... so, any idea what to > use instead? Is there already a tool or framework for solving a > problem like this available or do I have to start from scratch? Not > that I'd be too lazy, but what's the use of reinventing the wheel > repeatedly...? ;) > > Regards, > > Bernd > _______________________________________________ > Users mailing list: Users@clusterlabs.org > https://lists.clusterlabs.org/mailman/listinfo/users > > Project Home: http://www.clusterlabs.org > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf > Bugs: http://bugs.clusterlabs.org
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