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Posted to dev@cassandra.apache.org by Roland Gude <ro...@yoochoose.com> on 2011/02/08 10:25:43 UTC
Monitoring Cluster with JMX
Hello,
we are trying to monitor our cassandra cluster with Nagios JMX checks. While there are JMX attributes which expose the list of reachable/unreachable hosts, it would be very helpful to have additional numeric attributes exposing the size of these lists. This could be used to set thresholds (in Nagios monitoring) i.e. at least 3 hosts must be reachable before Nagios issues a warning.
This is probably not hard to do and we are willing to implement/supply patches if someone could point us in the right direction on where to implement it.
Greetings,
roland
--
YOOCHOOSE GmbH
Roland Gude
Software Engineer
Im Mediapark 8, 50670 Köln
+49 221 4544151 (Tel)
+49 221 4544159 (Fax)
+49 171 7894057 (Mobil)
Email: roland.gude@yoochoose.com
WWW: www.yoochoose.com<http://www.yoochoose.com/>
YOOCHOOSE GmbH
Geschäftsführer: Dr. Uwe Alkemper, Michael Friedmann
Handelsregister: Amtsgericht Köln HRB 65275
Ust-Ident-Nr: DE 264 773 520
Sitz der Gesellschaft: Köln
AW: Monitoring Cluster with JMX
Posted by Roland Gude <ro...@yoochoose.com>.
Ah... thanks for the pointer.
This should indeed be musch simpler.
Thanks.
-----Ursprüngliche Nachricht-----
Von: Ryan King [mailto:ryan@twitter.com]
Gesendet: Mittwoch, 9. Februar 2011 18:11
An: dev@cassandra.apache.org
Betreff: Re: Monitoring Cluster with JMX
If you're using 0.7, I'd skip jmx and use the mx4j http interface then
write scripts that convert the data to the format you need.
-ryan
On Wed, Feb 9, 2011 at 2:47 AM, Roland Gude <ro...@yoochoose.com> wrote:
> Unfortunately not, as the nagios JMX check expects a numeric return value and only allows for defining thresholds for issuing warnings or errors depending on that value. It does not allow for post processing the return values.
>
> roland
>
> Von: Aaron Morton [mailto:aaron@thelastpickle.com]
> Gesendet: Dienstag, 8. Februar 2011 21:32
> An: dev@cassandra.apache.org
> Betreff: Re: Monitoring Cluster with JMX
>
> Can't you get the length of the list on the monitoring side of things ?
> aaron
> On 08 Feb, 2011,at 10:25 PM, Roland Gude <ro...@yoochoose.com> wrote:
> Hello,
>
> we are trying to monitor our cassandra cluster with Nagios JMX checks. While there are JMX attributes which expose the list of reachable/unreachable hosts, it would be very helpful to have additional numeric attributes exposing the size of these lists. This could be used to set thresholds (in Nagios monitoring) i.e. at least 3 hosts must be reachable before Nagios issues a warning.
> This is probably not hard to do and we are willing to implement/supply patches if someone could point us in the right direction on where to implement it.
>
> Greetings,
> roland
>
> --
> YOOCHOOSE GmbH
>
> Roland Gude
> Software Engineer
>
> Im Mediapark 8, 50670 Köln
>
> +49 221 4544151 (Tel)
> +49 221 4544159 (Fax)
> +49 171 7894057 (Mobil)
>
>
> Email: roland.gude@yoochoose.com<ma...@yoochoose.com>
> WWW: www.yoochoose.com<http://www.yoochoose.com/<http://www.yoochoose.com%3chttp:/www.yoochoose.com/>>
>
> YOOCHOOSE GmbH
> Geschäftsführer: Dr. Uwe Alkemper, Michael Friedmann
> Handelsregister: Amtsgericht Köln HRB 65275
> Ust-Ident-Nr: DE 264 773 520
> Sitz der Gesellschaft: Köln
>
--
-@rk
Re: Monitoring Cluster with JMX
Posted by Ryan King <ry...@twitter.com>.
If you're using 0.7, I'd skip jmx and use the mx4j http interface then
write scripts that convert the data to the format you need.
-ryan
On Wed, Feb 9, 2011 at 2:47 AM, Roland Gude <ro...@yoochoose.com> wrote:
> Unfortunately not, as the nagios JMX check expects a numeric return value and only allows for defining thresholds for issuing warnings or errors depending on that value. It does not allow for post processing the return values.
>
> roland
>
> Von: Aaron Morton [mailto:aaron@thelastpickle.com]
> Gesendet: Dienstag, 8. Februar 2011 21:32
> An: dev@cassandra.apache.org
> Betreff: Re: Monitoring Cluster with JMX
>
> Can't you get the length of the list on the monitoring side of things ?
> aaron
> On 08 Feb, 2011,at 10:25 PM, Roland Gude <ro...@yoochoose.com> wrote:
> Hello,
>
> we are trying to monitor our cassandra cluster with Nagios JMX checks. While there are JMX attributes which expose the list of reachable/unreachable hosts, it would be very helpful to have additional numeric attributes exposing the size of these lists. This could be used to set thresholds (in Nagios monitoring) i.e. at least 3 hosts must be reachable before Nagios issues a warning.
> This is probably not hard to do and we are willing to implement/supply patches if someone could point us in the right direction on where to implement it.
>
> Greetings,
> roland
>
> --
> YOOCHOOSE GmbH
>
> Roland Gude
> Software Engineer
>
> Im Mediapark 8, 50670 Köln
>
> +49 221 4544151 (Tel)
> +49 221 4544159 (Fax)
> +49 171 7894057 (Mobil)
>
>
> Email: roland.gude@yoochoose.com<ma...@yoochoose.com>
> WWW: www.yoochoose.com<http://www.yoochoose.com/<http://www.yoochoose.com%3chttp:/www.yoochoose.com/>>
>
> YOOCHOOSE GmbH
> Geschäftsführer: Dr. Uwe Alkemper, Michael Friedmann
> Handelsregister: Amtsgericht Köln HRB 65275
> Ust-Ident-Nr: DE 264 773 520
> Sitz der Gesellschaft: Köln
>
--
-@rk
AW: Monitoring Cluster with JMX
Posted by Roland Gude <ro...@yoochoose.com>.
Unfortunately not, as the nagios JMX check expects a numeric return value and only allows for defining thresholds for issuing warnings or errors depending on that value. It does not allow for post processing the return values.
roland
Von: Aaron Morton [mailto:aaron@thelastpickle.com]
Gesendet: Dienstag, 8. Februar 2011 21:32
An: dev@cassandra.apache.org
Betreff: Re: Monitoring Cluster with JMX
Can't you get the length of the list on the monitoring side of things ?
aaron
On 08 Feb, 2011,at 10:25 PM, Roland Gude <ro...@yoochoose.com> wrote:
Hello,
we are trying to monitor our cassandra cluster with Nagios JMX checks. While there are JMX attributes which expose the list of reachable/unreachable hosts, it would be very helpful to have additional numeric attributes exposing the size of these lists. This could be used to set thresholds (in Nagios monitoring) i.e. at least 3 hosts must be reachable before Nagios issues a warning.
This is probably not hard to do and we are willing to implement/supply patches if someone could point us in the right direction on where to implement it.
Greetings,
roland
--
YOOCHOOSE GmbH
Roland Gude
Software Engineer
Im Mediapark 8, 50670 Köln
+49 221 4544151 (Tel)
+49 221 4544159 (Fax)
+49 171 7894057 (Mobil)
Email: roland.gude@yoochoose.com<ma...@yoochoose.com>
WWW: www.yoochoose.com<http://www.yoochoose.com/<http://www.yoochoose.com%3chttp:/www.yoochoose.com/>>
YOOCHOOSE GmbH
Geschäftsführer: Dr. Uwe Alkemper, Michael Friedmann
Handelsregister: Amtsgericht Köln HRB 65275
Ust-Ident-Nr: DE 264 773 520
Sitz der Gesellschaft: Köln
Re: Monitoring Cluster with JMX
Posted by Aaron Morton <aa...@thelastpickle.com>.
Can't you get the length of the list on the monitoring side of things ?
aaron
On 08 Feb, 2011,at 10:25 PM, Roland Gude <ro...@yoochoosecom> wrote:
Hello,
we are trying to monitor our cassandra cluster with Nagios JMX checks. While there are JMX attributes which expose the list of reachable/unreachable hosts, it would be very helpful to have additional numeric attributes exposing the size of these lists. This could be used to set thresholds (in Nagios monitoring) i.e. at least 3 hosts must be reachable before Nagios issues a warning.
This is probably not hard to do and we are willing to implement/supply patches if someone could point us in the right direction on where to implement it.
Greetings,
roland
--
YOOCHOOSE GmbH
Roland Gude
Software Engineer
Im Mediapark 8, 50670 Köln
+49 221 4544151 (Tel)
+49 221 4544159 (Fax)
+49 171 7894057 (Mobil)
Email: roland.gude@yoochoose.com
WWW: www.yoochoose.com<http://www.yoochoose.com/>
YOOCHOOSE GmbH
Geschäftsführer: Dr. Uwe Alkemper, Michael Friedmann
Handelsregister: Amtsgericht Köln HRB 65275
Ust-Ident-Nr: DE 264 773 520
Sitz der Gesellschaft: Köln