Comment 16 for bug 1516451

Since check_all_disks is internally defined in Nagios, you might well see a "duplicate definition" error if you define your own check_all_disks command. I'd recommend

define command{
    command_name check_all_physical_disks
    command_line /usr/lib/nagios/plugins/check_disk -w '$ARG1$' -c '$ARG2$' -e -A --exclude-type=tracefs --exclude-type=cgroup --exclude_device=/run/lxcfs/controllers
}

instead, and then call that in your host definition:

define service {
 use generic-service
 hostgroup_name all
 service_description Disk Space
 check_command check_all_physical_disks!6%!4%
}