apt install icinga2
apt install nsca-ng-server

apt install nsca-ng-client

command_file = "/run/icinga2/cmd/icinga2.cmd"
user = "nagios"

authorize "example" {
    password = "PASSWORD"
    host     = "example.com"
    services = {
        "*",
    }
}

object Host "example"{
    import
    name = "example.com"
    address = "example.com"

    # mark as node
    var.is_node = "true"

    # default check intervals
    max_check_attempts = 7
    retry_interval = 1m

    # add this if you want mail notifications
    vars.notification["mail"] = {
        groups = [ "icingaadmins" ]
    }
}

template Service "remote_passive" {
    import "generic-service"
    check_interval = 10m
    retry_interval = 1m
    check_command = passive
}

apply Service "serivce-name" {
    import "remote_passive"
    assign where host.var.is_node
}

server   = "example.com"
identity = "example"
password = "PASSWORD"

user<TAB>service-name<TAB>command-to-execute-with-args

nobody  test-apt /usr/lib/nagios/plugins/check_apt -o

/etc/monitoring/monitoring-report.py -c /PATH/TO/monitoring.conf