problem with item with ssh agent

[jgironda]

Hello,

I had created a item for check Memory size, with the following data:

Description: Memory
Type SSH Agent
Key ssh.run[memoria]
Authentication method Password
User name xxx
Password xxx
Executed script LANG= free | grep Mem | awk "{print $3 * 100 / $2}"
Type of information Numeric(Float)
Units %
Use multiplier
Update interval (in sec) 30


The problem is that the item does not work in all host, in one host the result it is correct and the other host the "lastest data" is not updated.

Why??

In the host with the problem, I can execute the scritp and work fine.

I would like know how Zabbix execute the script, for example:

ssh user@ip 'LANG= free | grep Mem | awk "{print $3 * 100 / $2}"'

Thank you for your time.

[jgironda]

Hello,

Nobody has this problem??????

[bashman]

Have you tried to write ip and port?

ssh.run[<unique short description>,<ip>,<port>,<encoding>]

[alixen]

Hi,

Are you sure that your command is working ?

On Debian Lenny, I get:

# LANG= free | grep Mem | awk "{print $3 * 100 / $2}"
awk: line 1: syntax error at or near *

If I replace double quotes by single quotes, it works:

# LANG= free | grep Mem | awk '{print $3 * 100 / $2}'
93.8524

Regards,
Alixen

[bashman]

On RedHat 5:

free | grep Mem | awk "{print $3 * 100 / $2}"
awk: {print  * 100 / }
awk:         ^ syntax error

free | grep Mem | awk '{print $3 * 100 / $2}'
54.5354

The same problem, try to change double quotes for simple quotes.

[jgironda]

Have you tried to write ip and port?

ssh.run[<unique short description>,<ip>,<port>,<encoding>]

Hello,

I do not try this becouse I had defined my item in a template, and I think that I can not put one ip.

Thank you.

[bashman]

Hello,

I do not try this becouse I had defined my item in a template, and I think that I can not put one ip.

Thank you.

Ok, you can use macros when you're using templates.

[jgironda]

Hi,

Are you sure that your command is working ?

On Debian Lenny, I get:

# LANG= free | grep Mem | awk "{print $3 * 100 / $2}"
awk: line 1: syntax error at or near *

If I replace double quotes by single quotes, it works:

# LANG= free | grep Mem | awk '{print $3 * 100 / $2}'
93.8524

Regards,
Alixen

Hello,

The command no it is the problem, but thank very much you for the interest.


I would like know as Zabbix Launch the scritp, for example:

ssh user@host "command;command"

[jgironda]

Ok, you can use macros when you're using templates.

I go to investigated using macros... I never user macros.

and do you now as Zabbix launch the command with ssh agent.


Thank you very much!!!

[alixen]

Hi,

Hello,

The command no it is the problem, but thank very much you for the interest.

I really think that it IS the problem since $ meta character is interpreted by the shell within double quotes, which is not the case with single quotes.
However, if you are convinced that bashman and myself are wrong, so be it ...

I would like know as Zabbix Launch the scritp, for example:

ssh user@host "command;command"

Zabbix uses libssh2 internally, so I think that it does not use ssh command.

Hope this helps
Alixen

[jgironda]

Hi,



I really think that it IS the problem since $ meta character is interpreted by the shell within double quotes, which is not the case with single quotes.
However, if you are convinced that bashman and myself are wrong, so be it ...



Zabbix uses libssh2 internally, so I think that it does not use ssh command.

Hope this helps
Alixen

Hello Alixen,

I are not convinced that you are wrong, I change the "" by '' 1000 time, and other change, but mi error es very stange:


I define the item (as up) but I change the "" by ''


I probe the script from zabbix server to monitoring server (4 server):

[root@smaxxxx01 html]# ssh operacion@smxxx20 LANG= free | grep Mem | awk '{print $3 * 100 / $2}'
Password:
96.4913
[root@smaxx01 html]# ssh operacion@smxxx24 LANG= free | grep Mem | awk '{print $3 * 100 / $2}'
Password:
98.0885
[root@smaxxx01 html]# ssh operacion@smxxx48 LANG= free | grep Mem | awk '{print $3 * 100 / $2}'
Password:
99.7297
[root@smaxxx01 html]# ssh operacion@smxxxx75 LANG= free | grep Mem | awk '{print $3 * 100 / $2}'
operacion@smxxx75's password:
96.4011
[root@smaxxxx01 html]# ssh operacion@smaxxx61 LANG= free | grep Mem | awk '{print $3 * 100 / $2}'
operacion@smxxx61's password:
85.8811

but in the last date, the host 48 show 0% evertime, and the 61, no show any result!!



Host image Description Last check down Last value Change History
20 image - other - (1 Items)
memoria 04 May 2010 14:51:47 96.58 % -0.01 % Graph
24 image - other - (1 Items)
memoria 04 May 2010 14:51:46 98.08 % +0.05 % Graph
48 image - other - (1 Items)
memoria 28 Apr 2010 13:04:15 0 % - Graph
75 image - other - (1 Items)
memoria 04 May 2010 14:51:47 96.32 % 0 % Graph


The correct value of smaxxx48 it is 99% and the smaxxx61 is 85%

[alixen]

Hi,

Hello Alixen,

I probe the script from zabbix server to monitoring server (4 server):

[root@smaxxxx01 html]# ssh operacion@smxxx20 LANG= free | grep Mem | awk '{print $3 * 100 / $2}'
Password:
96.4913

Your test is not valid, only 'free' command is run through ssh, remaining commands after first pipe are run locally on your zabbix server.
If you want to run all commands through ssh, you have to carefully quote them:

ssh operacion@smxxx20 "LANG= free | grep Mem | awk '{print $3 * 100 / $2}'"

Sorry to bother you with all these shell syntax details but if you want to check your commands, you have to be sure that they are run remotely.

Hope this helps
Alixen

[jgironda]

Ok.... my mistake


I had checked with your command:

[root@smxxxx01 ~]# ssh operacion@smaxxx48 "LANG= free | grep Mem | awk '{print \$3 * 100 / \$2}'"
Password:
99,7495
[root@sxxxx01 ~]# ssh operacion@smaxxxx24 "LANG= free | grep Mem | awk '{print \$3 * 100 / \$2}'"
Password:
99.5417
[root@smaxxxx01 ~]# ssh operacion@smadxxx75 "LANG= free | grep Mem | awk '{print \$3 * 100 / \$2}'"
operacion@smadava75's password:
96.3551

And the check by ssh it is correct, but in zabbix not work fine.


I do not know that put in "Excecuted script" field in the Item.

Now, I write this:

"LANG= free | grep Mem | awk '{print \$3 * 100 / \$2}'"


And the Lastes date is not updated....

And In the zabbix logs, I do not see error...

23539:20100504:173346.813 Get value from agent result: '239265727'
23539:20100504:173346.813 End of get_value():SUCCEED
23539:20100504:173346.813 In calculate_item_nextcheck (18441,5,"",1272987226)
23539:20100504:173346.813 End calculate_item_nextcheck (result:1272987231)
23539:20100504:173346.813 In substitute_simple_macros (data:'ssh.run[memoria,{IPADDRESS},22,UTF8]')
23539:20100504:173346.813 End substitute_simple_macros (result:'ssh.run[memoria,10.xx.xx.16,22,UTF8]')
23539:20100504:173346.813 In substitute_simple_macros (data:'operacion')
23539:20100504:173346.813 In substitute_simple_macros(data:NULL)
23539:20100504:173346.813 In substitute_simple_macros(data:NULL)
23539:20100504:173346.814 In substitute_simple_macros (data:'XXXX')
23539:20100504:173346.814 In substitute_simple_macros (data:'"LANG= free | grep Mem | awk '{print \$3 * 100 / \$2}'"')
23539:20100504:173346.814 End substitute_simple_macros (result:'"LANG= free | grep Mem | awk '{print \$3 * 100 / \$2}'"')
23539:20100504:173346.814 In get_value() key:'ssh.run[memoria,{IPADDRESS},22,UTF8]'
23539:20100504:173346.814 In ssh_run()
23539:20100504:173346.994 ssh_run() Supported authentication methods:'publickey,password,keyboard-interactive'

Thank for your help

[jgironda]

Hello,

The issue is solve

The problem was in the item result, the separator decimal was different, one host with "." and other with ","

for this, in the scripts I put this:

sed -e 's/,/./'

And now Zabbix obtain the value correctly, becouse zabbix in my case work with "." separator for numeric type.


In other scripts the problem was the number format, becouse the result of the script was in cientific format, for example:

8.76575e+11

for this, in the awk, I had changed the command print by printf, for add a format:

printf "%15.0f\n", SUM


Thank you

[jangel]

Hello, try using '' in the key ssh.run['memory']