Hi Martin,

I do a similar thing with our Citrix servers, where I have a "Farm" host to hold a summary of the total number of connections across all servers.

I do this by running a script from hobbitlaunch on the server, and summing up the results of the individual Citrix servers using hobbitdboard. After parsing the results, I send a single message for the "Farm" host in the same format as the individual host messages and Hobbit magically makes the graph for me :-)

It's not too flash, but here are all the bits and pieces which make it work. I hope they may help you in making a similar script for a postfix farm.

BB-HOSTS ENTRIES :

127.0.0.1       citrix-farm    # COMMENT:"Farm Totals" testip

noconn noinfo notrends 192.168.1.101 citrix-01 # 192.168.1.102 citrix-02 #

SHELL SCRIPT /opt/hobbit/bin/citrix-totals.sh :

#!/bin/sh
 
TFIL=/tmp/`basename $0`.$$
 
/opt/hobbit/server/bin/bb localhost "hobbitdboard

host=citrix-[0-9][0-9] test=citrix fields=msg" | gsed 's/\\n/\n/g' > ${TFIL} LINE=grep -v 'users active' ${TFIL} CSUM=grep "users active" ${TFIL} | awk ' { sum += $1; } END { print sum; } ' if [ -z "${CSUM}" ] then CSUM=0 fi /opt/hobbit/server/bin/bb localhost "status citrix-farm.citrix green date ${CSUM} users active

${LINE}"
 
rm ${TFIL}

HOBBITLAUNCH.CFG ENTRY:

[citrix-totals]
        ENVFILE /opt/hobbit/server/etc/hobbitserver.cfg
        NEEDS hobbitd
        CMD /opt/hobbit/bin/citrix-totals.sh
        LOGFILE $BBSERVERLOGS/logs/citrix-totals.log
        INTERVAL 5m

The paths for the binaries etc would obviously need massaging to suit your installation. Good luck!

Andy.

From: Ward, Martin [mailto:Martin.Ward at colt.net] Sent: Wednesday, 7 November 2007 1:11 a.m. To: hobbit at hswn.dk Subject: [hobbit] Creating a fake, or combination, client

Hi all,

I am a newbie to Hobbit and have inherited a working system. I have a good idea of how it all hangs together but now I want to produce certain graphs and cannot figure out how.

I have a cluster of mail servers that run Postfix; each of these clients is monitored within Hobbit. In the Trends link for each client I have graphs showing the various mail queues (incoming, deferred etc) and this data is stored in RRD files on the Hobbit server.

Is there a way within Hobbit of creating a false or meta- client that can have a graph with data from all of these RRD files? Particularly I would like a graph that has all the incoming mail queue sizes on it with one line per server. I already have this information in lots of different RRD files but would like to have them all in one graph. I can create a graph outside of Hobbit to do this, but within the monitoring system it restricts the RRD files it will display data from to those in the data directory of the selected client (in the Trends link).

I have tried creating a new client in the data files ans symbolically linking the other RRD files into its data directory, but cannot persude the graphs to appear in the trends web page.

Thanks for your time,

|\/|artin

NetOps TAC T:+44 20 7863 5218 Group: +49 69 56607 0412 F: +44 20 7863 5210

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On Tuesday 06 November 2007, Ward, Martin wrote:

Hi all,

I am a newbie to Hobbit and have inherited a working system. I have a good idea of how it all hangs together but now I want to produce certain graphs and cannot figure out how.

I have a cluster of mail servers that run Postfix; each of these clients is monitored within Hobbit. In the Trends link for each client I have graphs showing the various mail queues (incoming, deferred etc) and this data is stored in RRD files on the Hobbit server.

Is there a way within Hobbit of creating a false or meta- client that can have a graph with data from all of these RRD files? Particularly I would like a graph that has all the incoming mail queue sizes on it with one line per server. I already have this information in lots of different RRD files but would like to have them all in one graph. I can create a graph outside of Hobbit to do this, but within the monitoring system it restricts the RRD files it will display data from to those in the data directory of the selected client (in the Trends link).

I have tried creating a new client in the data files ans symbolically linking the other RRD files into its data directory, but cannot persude the graphs to appear in the trends web page. You can create a custom cluster aware client that runs on the servers. The client uses an other client node to report.

An other possibility is to create in the rrd directory a new directory and create symlinks in this directory so each server has a symbolic link in this directory for the rrd that has the needed info. Give each symlink an other name. I use this to collect information of the CPU usage of lpars running on the same hardware box. So I created a new directory and created symlinks to the vmstat.rrd files I need. So in that directory I have a symlink named server-vmstat.rrd that points to ../server/vmstat.rrd. And that for each server running on that hardware box. To create the graphs, I added a new stanza to hobbitgraphs.cfg that parses the *-vmstat.rrd files. To access these graphs, you have to play with the url. The host parameter is the name of the created directory and the service is the name of added stamza. You don't a link from a hobbit page to this graph, but I already had a "handy-url-page" where I added a link to this graph.

Stef