Re: [ClusterLabs] Cluster monitoring
Will have a look. Thanks Arjun On Wed, Oct 21, 2015 at 8:26 PM, Ken Gaillot wrote: > On 10/21/2015 08:24 AM, Michael Schwartzkopff wrote: > > Am Mittwoch, 21. Oktober 2015, 18:50:15 schrieb Arjun Pandey: > >> Hi folks > >> > >> I had a question on monitoring of cluster events. Based on the > >> documentation it seems that cluster monitor is the only method > >> of monitoring the cluster events. Also since it seems to poll > >> based on the interval configured it might miss some events. Is > >> that the case ? > > > > No. the cluser is event-based. So it won't miss any event. If you > > use the cluster's tools, they see hte events. If you monitor the > > events you won't miss any either. > > FYI, Pacemaker 1.1.14 will have built-in handling of notification > scripts, without needing a ClusterMon resource. These will be > event-driven. Andrew Beekhof did a recent blog post about it: > http://blog.clusterlabs.org/blog/2015/reliable-notifications/ > > Pacemaker's monitors are polling, at the interval specified when > configuring the monitor operation. Pacemaker relies on the resource > agent to return status for monitors, so technically it's up to the > resource agent whether it can "miss" brief outages that occur between > polls. All the ones I've looked at would miss them, but generally > that's considered acceptable if the service is once again fully > working when the monitor runs (because it implies it recovered itself). > > Some people use an external monitoring system (nagios, icinga, zabbix, > etc.) in addition to Pacemaker's monitors. They can complement each > other, as the external system can check system parameters outside > Pacemaker's view and can alert administrators for some early warning > signs before a resource gets to the point of needing recovery. Of > course such monitoring systems are also polling at configured intervals. > > ___ > Users mailing list: Users@clusterlabs.org > http://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 > ___ Users mailing list: Users@clusterlabs.org http://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
Re: [ClusterLabs] Cluster monitoring
On 10/21/2015 08:24 AM, Michael Schwartzkopff wrote: > Am Mittwoch, 21. Oktober 2015, 18:50:15 schrieb Arjun Pandey: >> Hi folks >> >> I had a question on monitoring of cluster events. Based on the >> documentation it seems that cluster monitor is the only method >> of monitoring the cluster events. Also since it seems to poll >> based on the interval configured it might miss some events. Is >> that the case ? > > No. the cluser is event-based. So it won't miss any event. If you > use the cluster's tools, they see hte events. If you monitor the > events you won't miss any either. FYI, Pacemaker 1.1.14 will have built-in handling of notification scripts, without needing a ClusterMon resource. These will be event-driven. Andrew Beekhof did a recent blog post about it: http://blog.clusterlabs.org/blog/2015/reliable-notifications/ Pacemaker's monitors are polling, at the interval specified when configuring the monitor operation. Pacemaker relies on the resource agent to return status for monitors, so technically it's up to the resource agent whether it can "miss" brief outages that occur between polls. All the ones I've looked at would miss them, but generally that's considered acceptable if the service is once again fully working when the monitor runs (because it implies it recovered itself). Some people use an external monitoring system (nagios, icinga, zabbix, etc.) in addition to Pacemaker's monitors. They can complement each other, as the external system can check system parameters outside Pacemaker's view and can alert administrators for some early warning signs before a resource gets to the point of needing recovery. Of course such monitoring systems are also polling at configured intervals. ___ Users mailing list: Users@clusterlabs.org http://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
Re: [ClusterLabs] Cluster monitoring
Am Mittwoch, 21. Oktober 2015, 18:50:15 schrieb Arjun Pandey: > Hi folks > > I had a question on monitoring of cluster events. Based on the > documentation it seems that cluster monitor is the only method of > monitoring the cluster events. Also since it seems to poll based on the > interval configured it might miss some events. Is that the case ? No. the cluser is event-based. So it won't miss any event. If you use the cluster's tools, they see hte events. If you monitor the events you won't miss any either. Mit freundlichen Grüßen, Michael Schwartzkopff -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64, +49 (162) 165 0044 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein signature.asc Description: This is a digitally signed message part. ___ Users mailing list: Users@clusterlabs.org http://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
[ClusterLabs] Cluster monitoring
Hi folks I had a question on monitoring of cluster events. Based on the documentation it seems that cluster monitor is the only method of monitoring the cluster events. Also since it seems to poll based on the interval configured it might miss some events. Is that the case ? Is their any other alternative available ? As of now i'm only looking at Cluster Monitor which will be configured with an external program and the interval as a part of resource configuration. Regards Arjun ___ Users mailing list: Users@clusterlabs.org http://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