Monitoring switch HP ProCurve

Nsup · Jan 16th 2017

Hello,

I m an absolute beginner in icinga2, monitoring, SNMP, MIB, OID...

We have a small network with simple needs and until now we didn't have to use pro features.

Now we are asked to start monitoring the network so:

I've just installed icinga2 (on centos) and it works

I did a simple monitoring to a PC "hostalive" and another one with agent and it s OK

Now i'd like to Monitor a switch

HP J4887A ProCurve Switch 4104GL

I started with this

https://docs.icinga.com/icinga…chapter/monitoring-basics

and some other pages on the net.

But until now, it isn't so clear for me.

I have the MIB file for this switch

I ran a snmp_check and it works

root@7bea7dc73572:/usr/lib/nagios/plugins# ./check_snmp -H x.x.10.10 -C monitor -o .1.3.6.1.2.1.1.2.0

Now i have to define a host, services and maybe a command file for monitoring this switch.

I'd like to start with a simple thing, and for example monitor the fans status.

I have created under /etc/icinga2/conf.d a file for this switch, and for now i have this inside it.

object Host "1-ext_800" {

address = "x.x.10.10"

check_command = "hostalive"

}

/*

object Service "fans" {

host_name = "1-ext_800"

??

}

*/

How do i have to write this command

./check_snmp -H x.x.10.10 -C monitor -o .1.3.6.1.2.1.1.2.0

in the object Service "fans" {}

(.1.3.6.1.2.1.1.2.0 is not the fan status,

i didn't find how to check the fan for now,

but if this works, I'll just have to find the right OID)

I'll be pleased if someone can help me or redirect me to a simple "tutorial".

Thanks

Sam

branvan2k · Jan 16th 2017

Hi Nsup,

Take a look if you have the snmp CheckCommand already defined in:

/usr/share/icinga2/include/command-plugins.conf (maybe other path...)

I guess you do...

Following the CheckCommand definition, just put this info inside Service on the host.cfg file:

apply Service "FAN" {

import "generic-service"

vars.snmp_address = "x.x.10.10"

vars.snmp_oid = ".1.3.6.1.2.1.1.2.0"

vars.snmp_community = "monitor"

check_command = "snmp" vars.snmp_arguments = [ vars.snmp_address, vars.snmp_community, vars.snmp_oid ]

import "service-generic-instructions"

assign where host.name == "1-ext_800"

Let me know if it works.

dnsmichi · Jan 16th 2017

First off you should check the documentation for the CheckCommand you're using. All paramters are documented over there. After that you'll need to understand how to pass command arguments by just defining custom attributes on the service.

https://docs.icinga.com/icinga…plugin-check-command-snmp

x.x.10.10 is an IP address, that should be set on the Host object already, no need to specify that for the service again (unless it differs)
monitor is the snmp community
.1.3.... is the OID

Tip: It really helps to call the plugin with --help and look at the long options, not the short ones.

Nsup · Jan 18th 2017

Hello,

branvan2k

I have a SNMP check command under

/usr/lib/nagios/plugins

Under /etc/icinga2/conf.d

I create a file with this inside

Code

object Host "2-ext_800" {
address = "1.2.3.4"
check_command = "hostalive"
}
apply Service "FAN" {
import "generic-service"
# vars.snmp_address = "1.2.3.4"
vars.snmp_oid = ".1.3.6.1.2.1.1.2.0"
vars.snmp_community = "monitor"
# check_command = "snmp" vars.snmp_arguments = [ vars.snmp_address, vars.snmp_community, vars.snmp_oid ]
check_command = "snmp" vars.snmp_arguments = [ vars.snmp_community, vars.snmp_oid ]
import "service-generic-instructions"
assign where host.name == "2-ext_800"
}

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and when I restart the icinga2 service I get this error:

information/cli: Icinga application loader (version: r2.6.0-1)

information/cli: Loading configuration file(s).

critical/config: Error: syntax error, unexpected T_IDENTIFIER, expecting '}'

Location: in /etc/icinga2/conf.d/hosts.conf: 64:25-64:28

/etc/icinga2/conf.d/hosts.conf(62):

/etc/icinga2/conf.d/hosts.conf(63): # check_command = "snmp" vars.snmp_arguments = [ vars.snmp_address, vars.snmp_community, vars.snmp_oid ]

/etc/icinga2/conf.d/hosts.conf(64): check_command = "snmp" vars.snmp_arguments = [ vars.snmp_community, vars.snmp_oid ]

^^^^

/etc/icinga2/conf.d/hosts.conf(65):

/etc/icinga2/conf.d/hosts.conf(66): import "service-generic-instructions"

I suppose that the “snmp_arguments” is the problem because this attribute doesn’t appear in this list

https://docs.icinga.com/icinga2/latest/doc/module/icinga2/toc#!/icinga2/latest/doc/module/icinga2/chapter/plugin-check-commands#plugin-check-command-snmp

dnsmichi

Based on this

https://docs.icinga.com/icinga…ommand-passing-parameters

I’m not sure, but I suppose that I don’t have to write my own command in

/etc/icinga2/conf.d/commands.conf

like the example we can see in the page .../monitoring-basics#command-passing-parameters

object CheckCommand "my-mysql" {…}

I have an object CheckCommand "snmp" {…} in

/usr/share/icinga2/include/command-plugins.conf

Also, I don’t think that it’s important, but my “check_snmp” have a “older” version that the one I can see there

https://www.monitoring-plugins.org/doc/man/check_http.html

this is mine:

check_snmp -h

check_snmp v1.5 (nagios-plugins 1.5)

…

So, based on this

https://docs.icinga.com/icinga…ommand-passing-parameters

I wrote this:

(file under /etc/icinga2/conf.d/)

Code

object Host "3-ext_800" {
address = "1.2.3.4"
check_command = "hostalive"
}
apply Service "fan" {
import "generic-service"
check_command = "check_snmp"
vars.snmp_oid = ".1.3.6.1.2.1.1.2.0"
vars.snmp_community = "monitor"
assign where match("3-ext_800", host.name)
#assign where host.name == "2-ext_800"//what is the right syntax
}

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Now I get this error:

information/cli: Icinga application loader (version: r2.6.0-1)

information/cli: Loading configuration file(s).

information/ConfigItem: Committing config item(s).

information/ApiListener: My API identity: 7bea7dc73572

critical/config: Error: Validation failed for object '3-ext_800!fan' of type 'Service'; Attribute 'check_command': Object 'check_snmp' of type 'CheckCommand' does not exist.

Location: in /etc/icinga2/conf.d/switch-ext-03.conf: 12:2-12:29

/etc/icinga2/conf.d/switch-ext-03.conf(10): import "generic-service"

/etc/icinga2/conf.d/switch-ext-03.conf(11):

/etc/icinga2/conf.d/switch-ext-03.conf(12): check_command = "check_snmp"

^^^^^^^^^^^^^^^^^^^^^^^^^^^^

/etc/icinga2/conf.d/switch-ext-03.conf(13): vars.snmp_oid = ".1.3.6.1.2.1.1.2.0"

/etc/icinga2/conf.d/switch-ext-03.conf(14): vars.snmp_community = "monitor"

critical/config: 1 error

Apparently I have to point to the object CheckCommand "snmp" {…} from the apply Service "fan" {…}

Thanks.

dnsmichi · Jan 18th 2017

Please use the code tags (</> icon) to properly format configs and log outputs.

Look at the error - modify the "check_command" attribute to reference a real CheckCommand object name.

branvan2k · Jan 18th 2017

Nsup,

In your first error, icinga2 tells you where's the problem:

Location: in /etc/icinga2/conf.d/hosts.conf: 64:25-64:28

So line 64 of /etc/icinga2/conf.d/hosts.conf

You have put 2 lines in 1

check_command = "snmp" vars.snmp_arguments = [ vars.snmp_community, vars.snmp_oid ]

It should be:

check_command = "snmp"

vars.snmp_arguments = [ vars.snmp_community, vars.snmp_oid ]

BUT i think you still need to pass the address in snmp_arguments:

snmp_address - Optional. The host's address. Defaults to "$address$" if the host's address attribute is set, "$address6$" otherwise.

vars.snmp_arguments = [ address, vars.snmp_community, vars.snmp_oid ]

Is this right @dnsmichi?

In the second error:

critical/config: Error: Validation failed for object '3-ext_800!fan' of type 'Service'; Attribute 'check_command': Object 'check_snmp' of type 'CheckCommand' does not exist.

It tells you there is no checkCommand with the name "check_snmp"

What's the name of the checkCommand for snmp in /usr/share/icinga2/include/command-plugins.conf

You say:

I have an object CheckCommand "snmp" {…} in

So the real name of the CheckCommand is snmp, right?

I think this should work:

Code

apply Service "fan" {
import "generic-service"
check_command = "snmp"
vars.snmp_address = address
vars.snmp_oid = ".1.3.6.1.2.1.1.2.0"
vars.snmp_community = "monitor"
assign where host.name == "2-ext_800"
}

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dnsmichi · Jan 18th 2017

branvan2k wrote:

vars.snmp_arguments = [ address, vars.snmp_community, vars.snmp_oid ]

Is this right @dnsmichi?

That makes no sense to me. You should not use snmp_arguments as this is not defined anywhere. Rather specify the listed custom attributes for community, oid and so on.

branvan2k · Jan 18th 2017

Really?

I thouth that if you have this CheckCommand definition:

You can set up the Service passing snmp_arguments...

Code

object CheckCommand "snmp" {
import "plugin-check-command"
command = [ PluginDir + "/check_snmp" ]
arguments = {
"-H" = "$snmp_address$"
"-o" = "$snmp_oid$"
"-C" = "$snmp_community$"
"-c" = "$snmp_crit$"
"-w" = "$snmp_warn$"
"-s" = "$snmp_string$"
"-r" = "$snmp_ereg$"
"-R" = "$snmp_eregi$"
"-l" = "$snmp_label$"
"-u" = "$snmp_units$"
"-t" = "$snmp_timeout$"
"-p" = "$snmp_port$"
"-e" = "$snmp_retries$"
"--invert-search" = {
set_if = "$snmp_invert_search$"
description = "Invert search result and return CRITICAL if found"
}
"-P" = "$snmp_version$"
"-m" = "$snmp_miblist$"
"--rate-multiplier" = "$snmp_rate_multiplier$"
"--rate" = {
set_if = "$snmp_rate$"
description = "Enable rate calculation"
}
"-n" = {
set_if = "$snmp_getnext$"
description = "Use SNMP GETNEXT instead of SNMP GET"
}
}
vars.snmp_address = {{
var addr_v4 = macro("$address$")
var addr_v6 = macro("$address6$")
if (addr_v4) {
return addr_v4
} else {
return "udp6:[" + addr_v6 + "]"
}
}}
vars.snmp_community = "public"
vars.snmp_invert_search = false
vars.snmp_timeout = "10"
}

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dnsmichi · Jan 18th 2017

I don't see any reference to snmp_arguments in that CheckCommand. Are you sure that the command line you've built with just that illustrates your passed arguments?

Nsup · Jan 18th 2017

Hello

It works

Thanks a lot.

See you soon for the next problem.

Code

}
object Host "3-ext_800" {
address = "10.0.10.10"
check_command = "hostalive"
}
apply Service "fan" {
import "generic-service"
check_command = "snmp"
vars.snmp_oid = ".1.3.6.1.2.1.1.2.0"
vars.snmp_community = "monitor"
assign where match("3-ext_800", host.name)

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branvan2k · Jan 19th 2017

Aaaahhh!!! OK, now i've got the whole picture.

Thank you dnsmichi .

Monitoring switch HP ProCurve

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