I took a step back yesterday and yes, I did make this too complicated and came
up with a similar solution too. Yours is a little more interesting however and
may need to adjust my monitoring check strategy to incorporate.
Thanks for the direction!!
On January 18, 2016 at 2:43:53 AM, Gunnar Beutner (gunnar.beut...@netways.de)
wrote:
Hello,
The if/else construct you’re using is evaluated when the CheckCommand is
instantiated - i.e. when Icinga starts and parses its config. „vars.servertype“
actually refers to the CheckCommand’s custom variables.
If you want the if/else to be evaluated for each check you’re going to have to
use a lambda function, like so:
object CheckCommand "check_timezone" {
import „nrpe-common"
command = [ PluginDir + "/check_nrpe", "-H", "$host.address$", "-c",
"check_timezone" ]
arguments += {
"-a" = {{
if (host.vars.servertype in [ "cassandra", "rabbit", "mq", "redis" ]) {
var tz_permanent = "UTC"
var tz_seasonal_comma = "UTC"
var localtime_hash = "c79354b8dbee09e62bbc3fb544853283"
} else {
var tz_permanent = "America/New_York"
var tz_seasonal_comma = "EST,EDT"
var localtime_hash = "e4ca381035a34b7a852184cc0dd89baa"
}
return tz_permanent + " " + tz_seasonal_comma + " " + localtime_hash
}}
"-t" = "$timeout$"
}
}
Does that feel overly complicated to you? Because… well, it should. Ideally you
should keep as much domain-specific knowledge out of the CheckCommand
definitions as possible.
A far better - and easier - way would be to use host templates:
template Host „utc-server“ {
vars.tz_permanent = "UTC"
vars.tz_seasonal_comma = "UTC"
vars.localtime_hash = "c79354b8dbee09e62bbc3fb544853283"
}
template Host „est-server“ {
vars.tz_permanent = "America/New_York"
vars.tz_seasonal_comma = "EST,EDT"
vars.localtime_hash = "e4ca381035a34b7a852184cc0dd89baa"
}
template Host „mq-server“ {
import „utc-server“
vars.servertype = „mq“
}
/* Additional templates for cassandra, rabbit, redis, etc. */
object Host „mq-server-001“ {
import „mq-server"
}
Kind regards,
Gunnar Beutner
On 16/01/16 19:32, "icinga-users on behalf of Rob DeSanno"
<icinga-users-boun...@lists.icinga.org on behalf of rdesa...@icloud.com> wrote:
>
>I’m trying to wrap my head around using if/else conditions for my
>CheckCommands but I can’t seem to get it to work. In this example, most of my
>servers timezone is set to EST whereas only a handful (cassandra, rabbit, mq,
>and redis) are set to UTC.
>
>
>How can I reconfigure this check to pass the correct variables based on the
>servertype defined in hosts.conf? I suspect that these checks are not picking
>up either set of variables but having a hard time figuring out how it should
>be set.
>
>
>Any thoughts?
>
>
>
>
>object CheckCommand "check_timezone" {
> import "nrpe-common"
> command = [ PluginDir + "/check_nrpe", "-H", "$host.address$", "-c",
> "check_timezone" ]
>
>
> arguments += {
> "-a" = "$tz_permanent$ $tz_seasonal_comma$ $localtime_hash$"
> "-t" = "$timeout$"
> }
>
>
> if ( vars.servertype == "cassandra" || vars.servertype == "rabbit" ||
> vars.servertype == “mq" || vars.servertype == "redis" ) {
> vars.tz_permanent = "UTC"
> vars.tz_seasonal_comma = "UTC"
> vars.localtime_hash = "c79354b8dbee09e62bbc3fb544853283"
> } else {
> vars.tz_permanent = "America/New_York"
> vars.tz_seasonal_comma = "EST,EDT"
> vars.localtime_hash = "e4ca381035a34b7a852184cc0dd89baa"
> }
>}
>
>
>apply Service "check_timezone" {
> import "generic-service"
> display_name = "timezone"
> check_command = "check_timezone"
>
>
> vars += {
> "timeout" = "30"
> }
>
>
> assign where host.vars.servertype in [ … ]
>
>
--
Gunnar Beutner
Senior Developer
NETWAYS GmbH | Deutschherrnstr. 15-19 | D-90429 Nuernberg
Tel: +49 911 92885-0 | Fax: +49 911 92885-77
CEO: Julian Hein, Bernd Erk | AG Nuernberg HRB18461
http://www.netways.de | gunnar.beut...@netways.de
** OSDC 2016 - April - netways.de/osdc **
** OSBConf 2016 - September - osbconf.org **
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