[Gluster-users] Monitoring Gluster availability

[Tejas N. Bhise]

Phil,

We are developing the dynamic volume features for the next release. To be able to do dynamic volume management, we are putting in some infrastructure that will provide list of volumes and what servers/exports the volume is spread across.

We would be happy to try and provide an interface for the kind of information you want. Please let us know in detail ( like some sort of specification, examples ) what all information you need to make your monitoring task easier.

I would like to encourage others also to pitch in with more information on how you monitor health of your system and if there is any specific information that your system would like to be presented natively from gluster. I will go through the requests and see what can be accommodated.

Regards,
Tejas.

----- Original Message -----
From: "phil cryer" <phil at cryer.us>
To: "Kelvin Westlake" <Kelvin at netbasic.co.uk>
Cc: gluster-users at gluster.org
Sent: Tuesday, May 11, 2010 1:33:03 AM
Subject: Re: [Gluster-users] Monitoring Gluster availability

On Fri, May 7, 2010 at 3:13 AM, Kelvin Westlake <Kelvin at netbasic.co.uk> wrote:
> Can anybody recommend away of monitoring gluster availability, I need to
> be made aware of a server or client crashes out. Is there some port or
> system component that can be monitored?

I use monit [ttp://mmonit.com/monit/] extensively, and have written a
simple config snippet to watch glusterfds and restart it if it has
failed.

from /etc/monit/monitrc

check process glusterfsd with pidfile /var/run/glusterfsd.pid
	start program = "/etc/init.d/glusterfsd start"
	stop program = "/etc/init.d/glusterfsd stop"
    	if failed host 127.0.0.1 port 6996 then restart
        if loadavg(5min) greater than 10 for 8 cycles then restart
    	if 5 restarts within 5 cycles then timeout

Today I was looking for a more 'gluster native' way of checking all
the nodes to see if each of them in the cluster are up, but haven't
gotten very far, save for pulling the hostnames out of the volfile:

grep "option remote-host" /etc/glusterfs/glusterfs.vol | uniq | cut -d" " -f7

but from there you'd need to do a shared ssh key setup for a script to
loop through those entries and check things in the logs on all the
servers...

Does anyone have a way they do it?

P


On Fri, May 7, 2010 at 3:13 AM, Kelvin Westlake <Kelvin at netbasic.co.uk> wrote:
> Hi Guys
>
>
>
> Can anybody recommend away of monitoring gluster availability, I need to
> be made aware of a server or client crashes out. Is there some port or
> system component that can be monitored?
>
>
>
> Cheers
>
> Kelvin
>
>
>
>
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