Service checks in hosts.cfg?
chiel
chiel at gmx.net
Sat Feb 24 15:29:24 CET 2007
Hi Hugo,
Thank you for your comments. I understand this way.
But what I'm trying to say is that
----- Original Message -----
From: "MANUEL CANSECO GARCIA" <MCG at mpsistemas.es>
To: <nagios-users at lists.sourceforge.net>
Sent: Saturday, February 24, 2007 3:07 PM
Subject: Re: [Nagios-users] Service checks in hosts.cfg?
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>>>> nagios-users 02/24/07 15:06 >>>
>
> On Sat, 24 Feb 2007, chiel wrote:
>
>> I have been working with Nagios for a couple of days now and I'm just
> beginning to understand the principle of the config (.cfg) files.
>> I understand that you create a service (let say Ping) and put all your
> hosts (or hostgroups) in there that you want to check with ping.
>
> First off. Print the manual in full or whatever allows you to read it
> cover to cover. But go over the full manual at least once from cover to
> cover.
>
>> But is it also possible to define these checks in the hosts.cfg file??
>> So I would become something like this:
>>
>> define host{
>> host_name server1
>> alias Linux server 1
>> address 10.0.0.1
>> contact_groups network_team
>> checks check_ping, check_load, check_snmp <--- This
> line
>> }
>
> This is rather completely wrong. I think you need to reverse your way of
>
> thinking.
>
> Think of hosts as machines. You can add a check on the machine but it is
>
> just to see if the hardware is there. For this most people use the
> default
> check but in some cases you need to deviate. That is where the checks on
> a
> host end.
>
> You care about service provided. You only check the host to make sure
> they
> remain active because you need them to run the service. In this regard
> you
> can think of CPU and memory usages as services on which other services
> rely. (If your CPU is 0% idle your MySQL service is likely to be running
>
> poorly.)
>
> So you need to add a 100 hosts if you have a 100 machines. But read the
> part on templates very very carefully as it will save a lot of time and
> work.
>
> Then you define service which may run on some hosts, mosts hosts or all
> hosts.
>
> So define a service named POSTFIX for example and use the check_smtp
> check
> to test it.
>
> If in doubt go over the manual a few times and study the mailinglist
> archives.
>
> For example my 4 backup DNS servers:
>
> # 4 backup servers:
> define hostgroup {
> hostgroup_name mydyndns-org
> alias mydyndns.org servers
> members ns2.mydyndns.org
> members ns3.mydyndns.org
> members ns4.mydyndns.org
> members ns5.mydyndns.org
> }
>
> # Template for these hosts
> define host {
> name mydyndns-template
> register 0
> check_command check-host-alive
> max_check_attempts 3
> active_checks_enabled 1
> passive_checks_enabled 0
> check_period 24x7
> retain_status_information 1
> retain_nonstatus_information 1
> notification_interval 60
> notification_period 24x7
> notification_options d,u,r,f
> notifications_enabled 1
> }
>
> # The 4 machines:
> define host{
> use mydyndns-template
> host_name ns2.mydyndns.org
> alias DNS server 2
> address 204.13.249.82
> parents transip-switch
> hostgroups mydyndns-org
> contact_groups mydyndns-org
> }
>
> define host{
> use mydyndns-template
> host_name ns3.mydyndns.org
> alias DNS server 3
> address 204.13.250.82
> # address 63.209.15.211
> parents transip-switch
> hostgroups mydyndns-org
> contact_groups mydyndns-org
> }
>
> define host{
> use mydyndns-template
> host_name ns4.mydyndns.org
> alias DNS server 4
> address 213.155.150.206
> parents transip-switch
> hostgroups mydyndns-org
> contact_groups mydyndns-org
> }
>
> define host{
> use mydyndns-template
> host_name ns5.mydyndns.org
> alias DNS server 5
> address 63.208.196.93
> parents transip-switch
> hostgroups mydyndns-org
> contact_groups mydyndns-org
> }
>
> # Now group the services on the 4 hosts:
> define servicegroup {
> servicegroup_name mydyndns-org
> alias mydyndns.org servers
> members ns2.mydyndns.org, *
> members ns3.mydyndns.org, *
> members ns4.mydyndns.org, *
> members ns5.mydyndns.org, *
> }
>
> # Service template:
> define service {
> name mydyndns-template
> register 0
> max_check_attempts 3
> normal_check_interval 5
> retry_check_interval 1
> active_checks_enabled 1
> passive_checks_enabled 1
> check_period 24x7
> retain_status_information 1
> retain_nonstatus_information 1
> notification_interval 60
> notification_period 24x7
> notification_options w,u,c,r,f
> notifications_enabled 1
> }
>
> # Add services to these hosts:
> define service{
> use mydyndns-template
> host_name
> ns2.mydyndns.org,ns3.mydyndns.org,ns4.mydyndns.org,ns5.mydyndns.org
> service_description DNS
> check_command
> check_dig!1!5!www.vanderkooij.org
> contact_groups mydyndns-org
> }
>
> define service{
> use mydyndns-template
> host_name
> ns2.mydyndns.org,ns3.mydyndns.org,ns4.mydyndns.org,ns5.mydyndns.org
> service_description PING
> check_command check_ping!300,20%!1000,60%
> contact_groups mydyndns-org
> }
>
> ......
>
> Hugo.
>
> --
> hvdkooij at vanderkooij.org http://hvdkooij.xs4all.nl/
> This message is using 100% recycled electrons.
>
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