root@Nagios:~# python nagios_netdata.py -H 127.0.0.1 -D apps.cpu -i 60 -w 80 -c 90
OK | kernel=0.070277775, log=0.000277777777778, system=0.0130555555556, inetd=0, cron=0.00333333333333, ksmd=0, other=0.000277777777778, lxc=0, ssh=0.00833333055556, netdata=1.35777795556, apache=0.00333333333333, nms=0.025,

cp netdata_to_nagios.py /usr/libexec/nagiosplugins/
chmod +x netdata_to_nagios.py

define command{
    command_name    check_memory_via_netdata
    command_line    $PLUGIN_PATH$/netdata_to_nagios.py -H $HOSTADDRESS$ -p $ARG1$ -D $ARG2$ -i $ARG3$ -w $ARG4$ -c $ARG5$
}

define service{
    use                             generic-service         ; Name of service template to use
    host_name                       mymachine
    service_description             Memory Usage
    check_command                   check_memory_via_netdata!19999!system.ram!2!80!90
}

define service{
    use                             generic-service         ; Name of service template to use
    host_name                       mymachine
    service_description             CPU Usage per process
    check_command                   check_cpu_via_netdata!19999!apps.cpu!60!80!90 ; Average cpu load during last 60 seconds
}

define service{
    use                             generic-service         ; Name of service template to use
    host_name                       mymachine
    service_description             CPU Usage per process
    check_command                   check_cpu_via_netdata!19999!system.cpu!60!80!90 ; Average cpu load during last 60 seconds
}

define service{
    use                             generic-service         ; Name of service template to use
    host_name                       mymachine
    service_description             CPU Usage per process
    check_command                   check_cpu_via_netdata!19999!disk_space._!60!80!90 ; monitor / partition
}

define service{
    use                             generic-service         ; Name of service template to use
    host_name                       mymachine
    service_description             CPU Usage per process
    check_command                   check_cpu_via_netdata!19999!disk_util.sda!60!80!90 ; Average load during last 60 seconds
}

define service{
    use                             generic-service         ; Name of service template to use
    host_name                       mymachine
    service_description             CPU Usage per process
    check_command                   check_cpu_via_netdata!19999!apache_local.workers!60!80!90 ; Average worker consumption during last 60 seconds
}

define service{
    use                             generic-service         ; Name of service template to use
    host_name                       mymachine
    service_description             CPU Usage per process
    check_command                   check_cpu_via_netdata!19999!nginx_local.connections!60!1900!2048 ; Average worker consumption during last 60 seconds
}

    Utilisation:
    netdata_to_nagios.py -H host -p port [-D <datasource>] [-i <interval>] -w <80> -c <90>
    
    Options:
     -h, --help 
        Show detailed help
        
     -H, --host
        Specify remote netdata host address
        Default : 127.0.0.1
        
     -p, --port
        Specify remote netdata port
        Default : 19999
        
     -D, --datasource
        Specify which datasource you want to check. 
        Available datasources :
            - apps.cpu                 (default) Check CPU load per process
            - system.ram               Check REAL RAM consumption
            - system.cpu               Gives CPU laod system view (user, system, nice, irq, softirq, iowait)
            - disk_util.sda            Check disk load (sda, sdb,... can specify the name of your drive)
            - disk_space.sda1          Check disk space (sda2, sdb1,... can specify the name of your partition)
            - apache_local.workers     Check Apache worker consumption
            - nginx_local.connections  Check nginx connections
            - nginx_local.requests     Check nginx request rate 
            - mdstat.mdstat_health     Check if there is a faulty md raid array
            
     -i interval
        Specify an interval in seconds (minimum 2)
        Default : 60
        
     -w, --warning
        Specify warning threshold
        
     -c, --critical
        Specify critical threshold