[ovirt-users] oVirt 3.5 : "Power Management Health Check" - feature pages

Mon May 5 08:52:25 UTC 2014

----- Original Message -----
> From: "Arthur Berezin" <aberezin at redhat.com>
> To: "Gilad Chaplik" <gchaplik at redhat.com>
> Cc: "users" <users at ovirt.org>, "Yair Zaslavsky" <yzaslavs at redhat.com>
> Sent: Monday, May 5, 2014 11:30:24 AM
> Subject: Re: [ovirt-users] oVirt 3.5 : "Power Management Health Check" - feature	pages
> 
> ----- Original Message -----
> 
> > From: "Yair Zaslavsky" <yzaslavs at redhat.com>
> > To: "Gilad Chaplik" <gchaplik at redhat.com>
> > Cc: "Arthur Berezin" <aberezin at redhat.com>, "users" <users at ovirt.org>
> > Sent: Monday, May 5, 2014 11:10:10 AM
> > Subject: Re: [ovirt-users] oVirt 3.5 : "Power Management Health Check" -
> > feature pages
> 
> > ----- Original Message -----
> > > From: "Gilad Chaplik" <gchaplik at redhat.com>
> > > To: "Yair Zaslavsky" <yzaslavs at redhat.com>
> > > Cc: "Arthur Berezin" <aberezin at redhat.com>, "users" <users at ovirt.org>
> > > Sent: Monday, May 5, 2014 10:57:01 AM
> > > Subject: Re: [ovirt-users] oVirt 3.5 : "Power Management Health Check" -
> > > feature pages
> > >
> > > ----- Original Message -----
> > > > From: "Yair Zaslavsky" <yzaslavs at redhat.com>
> > > > To: "Arthur Berezin" <aberezin at redhat.com>
> > > > Cc: "Gilad Chaplik" <gchaplik at redhat.com>, "users" <users at ovirt.org>
> > > > Sent: Monday, May 5, 2014 6:39:02 AM
> > > > Subject: Re: [ovirt-users] oVirt 3.5 : "Power Management Health Check"
> > > > -
> > > > feature pages
> > > >
> > > >
> > > >
> > > > ----- Original Message -----
> > > > > From: "Arthur Berezin" <aberezin at redhat.com>
> > > > > To: "Gilad Chaplik" <gchaplik at redhat.com>
> > > > > Cc: "users" <users at ovirt.org>
> > > > > Sent: Sunday, May 4, 2014 5:35:59 PM
> > > > > Subject: Re: [ovirt-users] oVirt 3.5 : "Power Management Health
> > > > > Check"
> > > > > -
> > > > > feature pages
> > > > >
> > > > > In this case engine periodically checks health of hosts' power
> > > > > management
> > > > > as
> > > > > HA relies on it.
> > > > >
> > > > > Arthur
> > > > >
> > > > > ----- Original Message -----
> > > > >
> > > > > > From: "Gilad Chaplik" <gchaplik at redhat.com>
> > > > > > To: "Eli Mesika" <emesika at redhat.com>
> > > > > > Cc: "users" <users at ovirt.org>, "Arthur Berezin"
> > > > > > <aberezin at redhat.com>
> > > > > > Sent: Sunday, May 4, 2014 5:26:45 PM
> > > > > > Subject: Re: [ovirt-users] oVirt 3.5 : "Power Management Health
> > > > > > Check"
> > > > > > -
> > > > > > feature pages
> > > > >
> > > > > > Hi Eli,
> > > > >
> > > > > > Here is my comment :)
> > > > > > Why engine needs to send the status health check, isn't there any
> > > > > > 3rd
> > > > > > parties
> > > > > > that does it, that we can integrate with?
> > > > > > If found, it probably has /less (known) bugs/more features/ and
> > > > > > it's
> > > > > > already
> > > > > > written, tested, documented, allows further integration and
> > > > > > probably
> > > > > > deals
> > > > > > with scale.
> > > > >
> > > > > > btw, fixed some typos in your pages :-)
> > > > >
> > > > > > Thanks,
> > > > > > Gilad.
> > > >
> > > > Hi, what 3rd party for example do you refer to?
> > > > The PM code already exists at engine,
> > > > And you're also using quartz for scheduling.
> > > >
> > >
> > > Yair,
> > >
> > > You're are raising some good points, but imo the entire host monitoring
> > > (inc
> > > getVdsStats, etc.) should be externalized.
> > > There are 2 major issues that we still don't cover:
> > > - No HA for monitoring, who checks the hosts when the engine is down.
> > > - No scale - the engine is a bottle-neck in network and compute.
> > > Although the above is a huge arch change, we need to start somewhere,
> > > this
> > > feature sounds like a candidate to introduce it.
> > >
> > > About the examples:
> > > http://sixrevisions.com/tools/10-free-server-network-monitoring-tools-that-kick-ass/
> > > The main goal of the feature if my suggestion is taken, is to select to
> > > most
> > > appropriate one.
> > >
> > > Thanks,
> > > Gilad.
> 
> > Well, Nagios is being considered to be used or used by Gluster guys.
> > However, it will still require (AFAIK) to code some nagios plugin to
> > perfrom
> > the health check.
> > In addition, you will have to report somehow the state change to engine.
> > IMHO, this a bit of an overkill (look also at the time that the check is
> > run
> > - once in an hour, so it can't be compared to getVmStats).
> +1
> These monitoring tools bring a lot of value, and there are some initial
> integrations that we might want to look into[1][2].
> But it's an overkill for this RFE - run "PM Check" periodically, in addition
> to initial PM check at host setup stage.
> 
> [1] https://github.com/monitoring-ui-plugin/development
> [2]
> http://exchange.nagios.org/directory/Plugins/Operating-Systems/*-Virtual-Environments/Others/check_rhev3/details

-1 on overkill.
As I mentioned, proper monitoring is a huge feature; it should be gradually introduced, IMO this is a good starting point.
We can look at it as an overkill _or_ as a jumpborad, that will reduce learning curve and future integrations issues.

Gilad.

> 
> > >
> > > >
> > > > >
> > > > > > ----- Original Message -----
> > > > > > > From: "Eli Mesika" <emesika at redhat.com>
> > > > > > > To: "users" <users at ovirt.org>
> > > > > > > Cc: "Arthur Berezin" <aberezin at redhat.com>
> > > > > > > Sent: Sunday, May 4, 2014 12:18:47 PM
> > > > > > > Subject: [ovirt-users] oVirt 3.5 : "Power Management Health
> > > > > > > Check"
> > > > > > > -
> > > > > > > feature pages
> > > > > > >
> > > > > > > Hi
> > > > > > >
> > > > > > > The following wiki pages were added to the "Power Management
> > > > > > > Health
> > > > > > > Check"
> > > > > > > feature planned for oVirt 3.5
> > > > > > >
> > > > > > > http://www.ovirt.org/Features/PMHealthCheck
> > > > > > > http://www.ovirt.org/Features/Design/DetailedPMHealthCheck
> > > > > > >
> > > > > > > Your comments/questions are mostly welcomed.
> > > > > > >
> > > > > > > Thanks
> > > > > > > Eli Mesika
> > > > > > > _______________________________________________
> > > > > > > Users mailing list
> > > > > > > Users at ovirt.org
> > > > > > > http://lists.ovirt.org/mailman/listinfo/users
> > > > > > >
> > > > >
> > > > > _______________________________________________
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> > > > > Users at ovirt.org
> > > > > http://lists.ovirt.org/mailman/listinfo/users
> > > > >
> > > >
> > >
> 