External check

[mike13]

Hi,

I wrote a script to check the reachability of my MPLS VPN devices. When i run my script manually it returns the correct value( device alive=1, unreachable=0). But, i can't figure out why zabbix always returns the value 0 weather the host is reacheble or not.

The script:

#!/bin/sh
fping -q -I $1 $2 > /dev/null 2>&1
if [ $? == 0 ]; then
	echo 1
	exit 1
else
	echo 0
	exit 0

fi

Item:
Host: Test
Description: check
Type: External check
Key: check.sh[eth1.153,{IPADDRESS}]


Tigger:
Name: {HOSTNAME} is Unreachable
Expression (Toggle input method): {Test:check.sh[eth1.153,{IPADDRESS}].last(90)}=0
Comments: Can not Ping {HOSTNAME} 3 times in last 1 minute 30

The zabbix log file shows:

762:20100624:114705.651 In substitute_simple_macros (data:'check.sh[eth1.153,{IPADDRESS}]')
762:20100624:114705.651 End substitute_simple_macros (result:'check.sh[eth1.153,192.168.49.124]')
762:20100624:114705.651 In get_value() key:'check.sh[eth1.153,{IPADDRESS}]'
762:20100624:114705.651 In get_value_external() key:'check.sh[eth1.153,{IPADDRESS}]'
762:20100624:114705.651 DEBUG [check.sh]
762:20100624:114705.651 params [eth1.153,192.168.49.124]
762:20100624:114705.651 /etc/zabbix/externalscripts/check.sh 192.168.49.124 eth1.153,192.168.49.124
762:20100624:114705.657 Result [0]
762:20100624:114705.657 End of get_value():SUCCEED

Does anyone know how to do this?
Many thanks,

Mike,

[ruswold]

Hi,

I wrote a script to check the reachability of my MPLS VPN devices. When i run my script manually it returns the correct value( device alive=1, unreachable=0). But, i can't figure out why zabbix always returns the value 0 weather the host is reacheble or not.

The script:

#!/bin/sh
fping -q -I $1 $2 > /dev/null 2>&1
if [ $? == 0 ]; then
	echo 1
	exit 1
else
	echo 0
	exit 0

fi

Item:
Host: Test
Description: check
Type: External check
Key: check.sh[eth1.153,{IPADDRESS}]


Tigger:
Name: {HOSTNAME} is Unreachable
Expression (Toggle input method): {Test:check.sh[eth1.153,{IPADDRESS}].last(90)}=0
Comments: Can not Ping {HOSTNAME} 3 times in last 1 minute 30

The zabbix log file shows:

762:20100624:114705.651 In substitute_simple_macros (data:'check.sh[eth1.153,{IPADDRESS}]')
762:20100624:114705.651 End substitute_simple_macros (result:'check.sh[eth1.153,192.168.49.124]')
762:20100624:114705.651 In get_value() key:'check.sh[eth1.153,{IPADDRESS}]'
762:20100624:114705.651 In get_value_external() key:'check.sh[eth1.153,{IPADDRESS}]'
762:20100624:114705.651 DEBUG [check.sh]
762:20100624:114705.651 params [eth1.153,192.168.49.124]
762:20100624:114705.651 /etc/zabbix/externalscripts/check.sh 192.168.49.124 eth1.153,192.168.49.124
762:20100624:114705.657 Result [0]
762:20100624:114705.657 End of get_value():SUCCEED

Does anyone know how to do this?
Many thanks,

Mike,

First parameter in zabbix is host or ip address of host, therefore try use in code script
fping -q -I $2 $1 > /dev/null 2>&1

and item key
check.sh[eth1.153]

[mike13]

First parameter in zabbix is host or ip address of host, therefore try use in code script
fping -q -I $2 $1 > /dev/null 2>&1

and item key
check.sh[eth1.153]

Hi,

First of all thank you for your answer. I made the modification as you said, but it still sends the value 0.

The log file:

 4165:20100624:162724.621 In substitute_simple_macros (data:'check.sh[eth1.155]')
  4165:20100624:162724.621 In get_value() key:'check.sh[eth1.155]'
  4165:20100624:162724.621 In get_value_external() key:'check.sh[eth1.155]'
  4165:20100624:162724.621 DEBUG [check.sh]
  4165:20100624:162724.621 params [eth1.155]
  4165:20100624:162724.621 /etc/zabbix/externalscripts/check.sh 192.168.49.124 eth1.155
  4165:20100624:162724.628 Result [0]
  4165:20100624:162724.628 End of get_value():SUCCEED

Could you please give me some advice?

Thanks
Mike

[ruswold]

try use /path_to_fping/fping -q -I $2 $1 > /dev/null 2>&1
example /usr/sbin/fping -q -I $2 $1 > /dev/null 2>&1

[jthakrar]

Just a quick note -
when I wrote some of my own external scripts, if the exit status was 1, then it would bring down the zabbix server (I was doing external checks on the server). It seems if the "zabbix poller" gets a return value of 1, it assumes there was some error and exits with error.

To return to your problem, try using the full path for fping as ruswold suggested.

Remember, even if you login as user zabbix and the command is accessible, it may not be so for the zabbix server, since it is started as a daemon from init (or whatever mechanism you have chosen).

[mike13]

try use /path_to_fping/fping -q -I $2 $1 > /dev/null 2>&1
example /usr/sbin/fping -q -I $2 $1 > /dev/null 2>&1

Just a quick note -
when I wrote some of my own external scripts, if the exit status was 1, then it would bring down the zabbix server (I was doing external checks on the server). It seems if the "zabbix poller" gets a return value of 1, it assumes there was some error and exits with error.

To return to your problem, try using the full path for fping as ruswold suggested.

Remember, even if you login as user zabbix and the command is accessible, it may not be so for the zabbix server, since it is started as a daemon from init (or whatever mechanism you have chosen).

Hi,

Thank you everyone for your answers. However the problem still remains.
I've even tried giving permission "chown zabbix:zabbix /usr/sbin/fping", and still no success.

Can anyone please help me out?

I shall be really thankful,

Mike

[ruswold]

May by problem is that script output to STDERR, but zabbix-agent get output from STDOUT
try make script in a perl

http://perldoc.perl.org/perlfaq8.html#How-can-I-capture-STDERR-from-an-external-command%3f

#!/usr/bin/perl -w

open(PIPE,'/usr/sbin/fping -qc3 $ARGV[1] 2>&1 |');

while(<PIPE>){
print $_;
}

[mike13]

May by problem is that script output to STDERR, but zabbix-agent get output from STDOUT
try make script in a perl

http://perldoc.perl.org/perlfaq8.html#How-can-I-capture-STDERR-from-an-external-command%3f

#!/usr/bin/perl -w

open(PIPE,'/usr/sbin/fping -qc3 $ARGV[1] 2>&1 |');

while(<PIPE>){
print $_;
}

Hi ruswold,

I'm a novice when it comes to perl so any help much appreciated. When i run the script on the shell returns nothing. How to test it?


Do you have any idea?

Many thaks,
Mike

[ruswold]

run script.pl IP_address
$ARGV[1] - first argument

[mike13]

run script.pl IP_address
$ARGV[1] - first argument

I’m sorry I miscommunicated to you. I known how to run the script. The script runs, but it returns nothing on the shell screen.

Could you help me?

Thanks,
Mike

[ruswold]

I’m sorry I miscommunicated to you. I known how to run the script. The script runs, but it returns nothing on the shell screen.

Could you help me?

Thanks,
Mike

1. i'm sorry, i was wrong, try whis

#!/usr/bin/perl

open(PIPE,"/usr/sbin/fping $ARGV[0] 2>&1|");
while(<PIPE>){
#print $_;
if (/^(\S+).*unreachable/){
print "0";
}
elsif (/^(\S+) is alive/){
print "1";
}
elsif (/^(\S+)\s+address\s+not\s+found/){
print "-1";
}
}
close(PIPE);

run script.pl HOST

2. I don't undestand options -I of fping
on my FreeBSD whis option is wrong

[mike13]

1. i'm sorry, i was wrong, try whis

#!/usr/bin/perl

open(PIPE,"/usr/sbin/fping $ARGV[0] 2>&1|");
while(<PIPE>){
#print $_;
if (/^(\S+).*unreachable/){
print "0";
}
elsif (/^(\S+) is alive/){
print "1";
}
elsif (/^(\S+)\s+address\s+not\s+found/){
print "-1";
}
}
close(PIPE);

run script.pl HOST

2. I don't undestand options -I of fping
on my FreeBSD whis option is wrong

Hi ruswold,

Your script is working fine, however i need to use the option fping -I in order to send the ping via a specific network interface. On my server each interface is attached to a different mpls vrf. Thus, i need to use the option fping -I to check the reachability of a host in a specific vrf.

On my debian the option fping -I is supported. I've modified the script as follow:

open(PIPE,"/usr/sbin/fping -I " . $ARGV[1]. " ".$ARGV[0]. " 2>&1|");

When i run it from shell it works fine. But zabbix says "not supported".



And my item is:
Host: Test
Description: check
Type: External check
Key: check.sh[eth1.155]

The log file:

[COLOR="black"] 20496:20100628:143524.910 In substitute_simple_macros (data:'pping.pl[eth1.155]')
 20496:20100628:143524.910 In get_value() key:'pping.pl[eth1.155]'
 20496:20100628:143524.911 In get_value_external() key:'pping.pl[eth1.155]'
 20496:20100628:143524.911 DEBUG [pping.pl]
 20496:20100628:143524.911 params [eth1.155]
 20496:20100628:143524.911 /etc/zabbix/externalscripts/pping.pl 192.168.49.124 eth1.155
 20516:20100628:143524.911 In process_escalations()
 20516:20100628:143524.911 Query [txnlev:0] [select escalationid,actionid,triggerid,eventid,r_eventid,esc_step,status from escalations where status in (0,1) and nextcheck<=1277728524 and escalationid between 000000000000000 and 099999999999999]
 20516:20100628:143524.911 Escalator spent 0.000410 seconds while processing escalation items. Nextcheck after 3 sec.
 20496:20100628:143524.918 Item [hpcable:pping.pl[eth1.155]] error: Script /etc/zabbix/externalscripts/pping.pl returned nothing.
 20496:20100628:143524.918 In zabbix_log()
 20496:20100628:143524.918 In DCconfig_get_items() hostid:0 key:'zabbix[log]'
 20496:20100628:143524.918 End of DCconfig_get_items():0
 20496:20100628:143524.918 End of zabbix_log()
 20496:20100628:143524.918 End of get_value():NOTSUPPORTED
 20496:20100628:143524.918 Parameter [hpcable:pping.pl[eth1.155]] is not supported by agent Old status [0][/COLOR]

Do you have any idea?
Could you please give me some advice?

Many thaks,
Mike

[ruswold]

1. You make item with key check.sh[eth1.155], but in log i see pping.pl[eth1.155].

I see in log that script return nothing, this is because you ping unreacheble host
try use timeout like this

#!/usr/bin/perl -w

#timeout in seconds
my $timeout = 15;
eval {
    local $SIG{ALRM} = sub { die "alarm\n" };
    alarm $timeout;

    open(PIPE,"/usr/sbin/fping $ARGV[1] 2>&1|");
    alarm 0;
    while(<PIPE>){
        if (/^(\S+).*unreachable/){
            print "0";
            }
    if (/^(\S+) is alive/){
            print "1";
            }
    elsif (/^(\S+)\s+address\s+not\s+found/){
        print "-1";
        }
    }

};
if ($@) {
    #timeout get value
     print "0";
    }
                                                                                                        close(PIPE);

And you must set in zabbix_server.conf timeout = 29 (max 30) seconds.

[mike13]

1. You make item with key check.sh[eth1.155], but in log i see pping.pl[eth1.155].

I see in log that script return nothing, this is because you ping unreacheble host
try use timeout like this

#!/usr/bin/perl -w

#timeout in seconds
my $timeout = 15;
eval {
    local $SIG{ALRM} = sub { die "alarm\n" };
    alarm $timeout;

    open(PIPE,"/usr/sbin/fping $ARGV[1] 2>&1|");
    alarm 0;
    while(<PIPE>){
        if (/^(\S+).*unreachable/){
            print "0";
            }
    if (/^(\S+) is alive/){
            print "1";
            }
    elsif (/^(\S+)\s+address\s+not\s+found/){
        print "-1";
        }
    }

};
if ($@) {
    #timeout get value
     print "0";
    }
                                                                                                        close(PIPE);

And you must set in zabbix_server.conf timeout = 29 (max 30) seconds.

I'm sorry, i've just copied the wrong item. But the log file is the correct one.

Here is my item:

Host: Test
Description: hpcable
Type: External check
Key: pping.pl[eth1.155]

And i've integrated your modification.

#!/usr/bin/perl

#timeout in seconds
my $timeout = 15;
eval {
    local $SIG{ALRM} = sub { die "alarm\n" };
    alarm $timeout;
open(PIPE,"/usr/sbin/fping -I " . $ARGV[1]. " ".$ARGV[0]. " 2>&1|");
while(<PIPE>){
#print $_;
	if (/^(\S+).*unreachable/){
		print "0";
	}
	elsif (/^(\S+) is alive/){
		print "1";
	}
	elsif (/^(\S+)\s+address\s+not\s+found/){
		print "-1";
	}
}
close(PIPE);
};
if ($@) {
    #timeout get value
     print "0";
    }

The script works fine in shell:

root@tcy:/etc/zabbix/externalscripts# ./pping.pl 192.168.49.124 eth1.155
1root@tcy:/etc/zabbix/externalscripts#

The log file:

20496:20100628:160824.401 In substitute_simple_macros (data:'pping.pl[eth1.155]')
 20496:20100628:160824.401 In get_value() key:'pping.pl[eth1.155]'
 20496:20100628:160824.401 In get_value_external() key:'pping.pl[eth1.155]'
 20496:20100628:160824.401 DEBUG [pping.pl]
 20496:20100628:160824.401 params [eth1.155]
 20496:20100628:160824.401 /etc/zabbix/externalscripts/pping.pl 192.168.49.124 eth1.155
 20496:20100628:160824.408 Item [comcable:pping.pl[eth1.155]] error: Script /etc/zabbix/externalscripts/pping.pl returned nothing.
 20496:20100628:160824.408 In zabbix_log()
 20496:20100628:160824.408 In DCconfig_get_items() hostid:0 key:'zabbix[log]'
 20496:20100628:160824.408 End of DCconfig_get_items():0
 20496:20100628:160824.409 End of zabbix_log()
 20496:20100628:160824.409 End of get_value():NOTSUPPORTED
 20496:20100628:160824.409 Parameter [comcable:pping.pl[eth1.155]] is not supported by agent Old status [0]

Still the same "not supported" message.



Do you have any idea?

Many thaks,
Mike

[ruswold]

1. Are you set in zabbix_server.conf timeout = 30 seconds?
And restart zabbix_server after changes in config file

This script work in my zabbix

2. If it's not help for you try set value type of item as text and say any changes.
3. Try run script as user zabbix, in freeBSD like: su zabbix -c 'pping.pl 192.168.49.124 eth1.155'. Work?