What are the valid values for Timezone in icinga-web

To add a host, you must define it first, e.g linux.cfg:

define host {
    use                 linux-server
    host_name           s80
    address             x.x.x.x
    check_command       check-icmp
    contact_groups      admin
}

(Do the sames for all services which you want to monitor)

Insert full path to this file into icinga.cfg:

cfg_file=/usr/local/icinga/etc/hosts/linux.cfg

Verify your configuration with:

# /usr/local/icinga/bin/icinga -v /usr/local/icinga/etc/icinga.cfg 

and restart Icinga:

# /etc/init.d/icinga reload

In my case, there were two changes that needed to be made.

1) /etc/default/icinga needs to be configured so that IDO2DB will run:

# start ido2db daemon (no/yes)
IDO2DB=yes

2) The IDO module needs to be defined in /etc/icinga/modules/

/etc/icinga/modules/idoutils.cfg:

define module {
    module_name    ido_mod
    path           /usr/lib/icinga/idomod.so
    module_type    neb
    args           config_file=/etc/icinga/idomod.cfg
    }

The previous config file will, of course, need to match how your system is configured. The above is being used on an Ubuntu 12.10 server.