Nagios is not exactly installed, just nrpe is.
Several audit messages indicate that the checkdisk_plugin has problems,
from these reports the following settings are derived...
---8<---
module nagios_nb 1.0;
require {
type devpts_t;
type nagios_checkdisk_plugin_t;
type usbfs_t;
type boot_t;
type default_t;
type sysfs_t;
type fusefs_t;
type sysctl_fs_t;
type samba_share_t;
type var_t;
type binfmt_misc_fs_t;
class dir { getattr search };
}
#============= nagios_checkdisk_plugin_t ==============
allow nagios_checkdisk_plugin_t binfmt_misc_fs_t:dir getattr;
allow nagios_checkdisk_plugin_t boot_t:dir getattr;
allow nagios_checkdisk_plugin_t default_t:dir getattr;
allow nagios_checkdisk_plugin_t devpts_t:dir getattr;
allow nagios_checkdisk_plugin_t fusefs_t:dir getattr;
allow nagios_checkdisk_plugin_t samba_share_t:dir getattr;
allow nagios_checkdisk_plugin_t sysctl_fs_t:dir search;
allow nagios_checkdisk_plugin_t sysfs_t:dir { getattr search };
allow nagios_checkdisk_plugin_t usbfs_t:dir getattr;
allow nagios_checkdisk_plugin_t var_t:dir getattr;