Compare two files on different Hosts, Problem with trigger

[Beam]

Hi,

i want to compare two files on different hosts (host1, host2, host3). On host1 there is the "master"-file, which is copied with rsync to host2 and host3. I only want a notification if the file on host2 or host3 is different.

e.g. there is an file /home/user/file on all hosts. I created an item on each host with key vfs.file.cksum[/home/user/file].

Then i created a trigger with the following expression:

{host2:vfs.file.cksum[/home/user/file].last(0)}#{host1:vfs.file.cksum[/home/user/file].last(0)}

The trigger is created on host1 and host2! On each host there is the same trigger (with the same id). Actually the trigger isn't really assigned to a host, but to all hosts included in the expression?

Is it possible to assign the trigger only to one host?

[Alexei]

A trigger is assigned to all hosts having their items in the trigger expression.

[gian72]

hi have you found a solution for this problem?
I've the same problem. Using zabbix 1.4.5.
this is the string i'm using:
({xxx:vfs.file.md5sum[/myfile].last(0)})#({YYY:vfs.file.md5sum[/myfile].last(0)})

but the trigger stays in an unknown state...
As you can see I'm monitoring the differences between two files (that should stay identical) on two different machines.

Thanks.

Gianluca

[gian72]

I've found a solution for my problem.
I wrote a little script that compares, via md5sum, the files that I want to compare. This is done on the zabbix machine that connects to the machines where the files are using ssh.
I call than the script via userparameters and check the results (the result can be 1 if the files are identical or 0 if not)
This is the script:

a=`ssh -l zabbix $1 'md5sum' $2 |awk -F" " '{print $1}'`
b=`ssh -l zabbix $3 'md5sum' $4 |awk -F" " '{print $1}'`


if [ "$a" = "$b" ]; then
    echo 1
else
    echo 0
fi

As you can see the script accepts 4 parameters:
$1= machine-a
$2= file on machine-a
$3= machine-b
$4= file on machine-b

you need to setup your system so you can execute this script on machine-a and on machine-b without password request. In thge above script I login on the machine as user zabbix. For more details on how to do this, see http://linuxproblem.org/art_9.html

In zabbix_agentd.conf you should have an entry like this:

UserParameter=compara[*],/etc/zabbix/bin/compara.sh $1 $2 $3 $4

compara.sh is the name of the script above...

In zabbix itself you should create an item with this

compara[machine-a,/file/on/machine-a,machine-b,/file/on/machine-b]

Than you can add your trigger like this one that fires if the script gives 0 as result (eg. the files are different):

{zabbixserver:compara[machine-a,/file/on/machine-a,machine-b,/file/on/machine-b].last(0)}=0

Hope this helps some one.

Gianluca

[nishant]

not supported by zabbix agent

I'm getting the below error when I use the above steps :

not supported by zabbix agent

Can you please help