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Update event handler chapter for SSH usage

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MarcusCaepio 2017-01-12 07:58:48 +01:00 committed by Michael Friedrich
parent 52d6db07f7
commit f3e32a4b35
1 changed files with 10 additions and 31 deletions
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doc/3-monitoring-basics.md
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@ -1958,7 +1958,6 @@ The `event_by_ssh_service` custom attribute takes care of passing the correct
daemon name, while `test $service.state_id$ -gt 0` makes sure that the daemon daemon name, while `test $service.state_id$ -gt 0` makes sure that the daemon
is only restarted when the service is not in an `OK` state. is only restarted when the service is not in an `OK` state.
object EventCommand "event_by_ssh_restart_service" { object EventCommand "event_by_ssh_restart_service" {
import "event_by_ssh" import "event_by_ssh"
@ -1971,9 +1970,8 @@ is only restarted when the service is not in an `OK` state.
Now set the `event_command` attribute to `event_by_ssh_restart_service` and tell it Now set the `event_command` attribute to `event_by_ssh_restart_service` and tell it
which service should be restarted using the `event_by_ssh_service` attribute. which service should be restarted using the `event_by_ssh_service` attribute.
object Service "http" { apply Service "http" {
import "generic-service" import "generic-service"
host_name = "remote-http-host"
check_command = "http" check_command = "http"
event_command = "event_by_ssh_restart_service" event_command = "event_by_ssh_restart_service"
@ -1981,11 +1979,12 @@ which service should be restarted using the `event_by_ssh_service` attribute.
//vars.event_by_ssh_logname = "icinga" //vars.event_by_ssh_logname = "icinga"
//vars.event_by_ssh_identity = "/home/icinga/.ssh/id_rsa.pub" //vars.event_by_ssh_identity = "/home/icinga/.ssh/id_rsa.pub"
assign where host.vars.httpd_name
} }
Specify the `httpd_name` custom attribute on the host to assign the
Each host with this service then must define the `httpd_name` custom attribute service and set the event handler service.
(for example generated from your cmdb):
object Host "remote-http-host" { object Host "remote-http-host" {
import "generic-host" import "generic-host"
@ -1994,34 +1993,14 @@ Each host with this service then must define the `httpd_name` custom attribute
vars.httpd_name = "apache2" vars.httpd_name = "apache2"
} }
You can testdrive this example by manually stopping the `httpd` daemon In order to test this configuration just stop the `httpd` on the remote host `icinga2-client1.localdomain`.
on your `remote-http-host`. Enable the `debuglog` feature and tail the
`/var/log/icinga2/debug.log` file.
Remote Host Terminal: [root@icinga2-client1.localdomain /]# systemctl stop httpd
# date; service apache2 status You can enable the [debug log](15-troubleshooting.md#troubleshooting-enable-debug-output) and search for the
Mon Sep 15 18:57:39 CEST 2014 executed command line.
Apache2 is running (pid 23651).
# date; service apache2 stop
Mon Sep 15 18:57:47 CEST 2014
[ ok ] Stopping web server: apache2 ... waiting .
Icinga 2 Host Terminal:
[2014-09-15 18:58:32 +0200] notice/Process: Running command '/usr/lib64/nagios/plugins/check_http' '-I' '192.168.1.100': PID 32622
[2014-09-15 18:58:32 +0200] notice/Process: PID 32622 ('/usr/lib64/nagios/plugins/check_http' '-I' '192.168.1.100') terminated with exit code 2
[2014-09-15 18:58:32 +0200] notice/Checkable: State Change: Checkable remote-http-host!http soft state change from OK to CRITICAL detected.
[2014-09-15 18:58:32 +0200] notice/Checkable: Executing event handler 'event_by_ssh_restart_service' for service 'remote-http-host!http'
[2014-09-15 18:58:32 +0200] notice/Process: Running command '/usr/lib64/nagios/plugins/check_by_ssh' '-C' 'test 2 -gt 0 && sudo /etc/init.d/apache2 restart' '-H' '192.168.1.100': PID 32623
[2014-09-15 18:58:33 +0200] notice/Process: PID 32623 ('/usr/lib64/nagios/plugins/check_by_ssh' '-C' 'test 2 -gt 0 && sudo /etc/init.d/apache2 restart' '-H' '192.168.1.100') terminated with exit code 0
Remote Host Terminal:
# date; service apache2 status
Mon Sep 15 18:58:44 CEST 2014
Apache2 is running (pid 24908).
[root@icinga2-client1.localdomain /]# tail -f /var/log/icinga2/debug.log | grep by_ssh
## <a id="dependencies"></a> Dependencies ## <a id="dependencies"></a> Dependencies