[Pacemaker] Announce: Making Resource Utilization Dynamic

[Andrew Beekhof]

On 08/06/2013, at 6:49 PM, Michael Schwartzkopff <misch at clusterbau.com> wrote:

> Am Donnerstag, 6. Juni 2013, 14:08:26 schrieb Andrew Beekhof:
> > On 06/06/2013, at 4:44 AM, Michael Schwartzkopff <misch at clusterbau.com> wrote:
> > > Hi,
> > > 
> > > I was not satisfied with the situation that the utilization of resources
> > > is static. This is not how real world resources behave. Especially
> > > virtual guests in a clustered environment show daily load patterns. So I
> > > thought it would be a good idea to make the utilization of resources
> > > dynamic. I worte a small patch for the VirtualDomain resource agent that
> > > updates the CPU utilization every time it monitors the resource.
> > > 
> > > Please read about the background in the following article:
> > > 
> > > http://www.sys4.de/de/blog/54/
> > > 
> > > 
> > > Any comments?
> > > Where can I send the patch to?
> > 
> > What patch :)
> > I see a code fragment but no context.
>  
> Patch:
>  
> --- VirtualDomain.orig  2013-06-08 10:24:54.403863313 +0200
> +++ VirtualDomain.new   2013-06-08 10:43:16.184253755 +0200
> @@ -187,6 +187,15 @@
>         dom_mem=$(LANG=C virsh $VIRSH_OPTIONS dominfo ${DOMAIN_NAME} | awk '/Max memory/{printf("%d", $3/1024)}')
>         test -n "$dom_mem" && set_util_attr hv_memory "$dom_mem"
>      fi
> +
> +    if [ -x /usr/bin/virt-top ]; then
> +      CPUS=$(/usr/bin/virsh nodeinfo | awk '/CPU\(s/ {print $2}')
> +      CPU_TICKS=$(/usr/bin/virt-top -n 2 -d 5 --stream | grep $DOMAIN_NAME | tail -1 | awk '{printf "%.0f",$7}')
> +      OLD_TICKS=$(crm_resource -r $OCF_RESOURCE_INSTANCE -z -g ticks)
> +      NEW_TICKS=$(((OLD_TICKS + CPU_TICKS * CPUS) / 2))
> +      /usr/sbin/crm_resource -r $OCF_RESOURCE_INSTANCE -z -p ticks -v ${NEW_TICKS}
> +    fi
> +
>  }
>  
>  # Set options to be passed to virsh:
>  
> > Also, what does the resource/constraint config look like?
>  
> primitive resMyDomain ocf:heartbeat:VirtualDomain params config="..."
>  
> no constraints.

Ok, let me rephrase... is there any part of the config that makes use of the values the RA defines?