Disable check-host-alive for certain hosts
Mike Simkins
mike.simkins at gmail.com
Thu Apr 7 10:05:32 CEST 2005
In your HOST definition (not service), there is also a check_command
(normally set to check-host-alive), if you set this to check_ssh
instead that should work correctly, I am using it for some routers on
my network where ICMP is blocked, and I use check_tcp to check them
for telnet access.
On Apr 5, 2005 4:36 PM, Bergström Sebastian
<Sebastian.Bergstroem at kunskapsskolan.se> wrote:
> I have the check_command defined to check_ssh. As I understand, normal behaviour for Nagios is that if a Service does not respond - it tries to Ping it instead. When the host does not reply on SSH calls, Nagios tries to ping the host instead which results in a host down alert.
>
> How do I change this behaviour?
>
> Below are the service settings for my SSH checks.
>
> Any input is deeply appreciated.
>
> Best regards,
> Sebastian Bergstroem
>
> ----
>
> checkcommands.cfg
>
> define command{
> command_name check_ssh
> command_line $USER1$/check_ssh $HOSTADDRESS$
> }
> ----
>
> services.cfg
>
> define service{
> name generic-service ; The 'name' of this se$
> active_checks_enabled 1 ; Active service checks are ena$
> passive_checks_enabled 1 ; Passive service checks are en$
> parallelize_check 1 ; Active service checks should $
> obsess_over_service 1 ; We should obsess over this se$
> check_freshness 0 ; Default is to NOT check servi$
> notifications_enabled 1 ; Service notifications are ena$
> event_handler_enabled 1 ; Service event handler is enab$
> flap_detection_enabled 1 ; Flap detection is enabled
> process_perf_data 1 ; Process performance data
> retain_status_information 1 ; Retain status information acr$
> retain_nonstatus_information 1 ; Retain non-status information$
> register 0 ; DONT REGISTER THIS DEFINITION$
> }
>
> # NSClient service definition template
> define service{
> use generic-service
> name nsclient-service
> check_period 24x7
> max_check_attempts 3
> normal_check_interval 10
> retry_check_interval 1
> contact_groups Operation
> notification_interval 30
> notification_period 24x7
> notification_options w,u,c,r
> register 0 ; DO NOT REGISTER, TEMPLATE!
> }
>
> define service{
> use nsclient-service
> host_name fw01,fw02,fw03
> service_description SSH
> check_command check_ssh
> }
> ----
>
> -----Ursprungligt meddelande-----
> Från: Mike Simkins [mailto:mike.simkins at gmail.com]
> Skickat: den 5 april 2005 10:27
> Till: Bergström Sebastian
> Kopia: nagios-users at lists.sourceforge.net
> Ämne: Re: [Nagios-users] Disable check-host-alive for certain hosts
>
>
> Change the check_command for the host to use an SSH check.
>
> You can use any check command to see if a host is alive, not just
> check-host-alive
>
> On Apr 4, 2005 12:25 PM, Bergström Sebastian
> <Sebastian.Bergstroem at kunskapsskolan.se> wrote:
> > We use Nagios v.1.2 and monitors some remote Firewalls (among others). The Firewalls does not reply on ICMP (which makes check-host-alive useless). Our current check implementation is to ensure that the SSH daemon runs on the Firewalls. When the SSH daemon does not respond for whatever reason, check-host-alive kicks in and that results in a Host down alert (since the Firewalls does not respond on ICMP).
> >
> > How can I force Nagios to only rely on the SSH service check?
> >
> > Any thoughts or ideas are deeply appreciated.
> >
> > Thanks in advance!
> >
> > Best regards,
> > Sebastian Bergstroem
> >
> > ----------------------------------------------
> > Sebastian Bergstroem
> > Technical coordinator
> > Kunskapsskolan i Sverige AB
> > sebastian.bergstroem at kunskapsskolan.se
> > -----------------------------------------------
> >
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