Description of problem:
I configured a service in nagios to use check_disk_smb and it always fails because of selinux.
define service {
    host_name            CIFSserver
    service_description  samba
    check_command        check_disk_smb!xxx
    ...
}
define command {
   command_name  check_disk_smb
   command_line  $USER1$/check_disk_smb -H $HOSTADDRESS$ -s $ARG1$ -u ID -p PW
}


Version-Release number of selected component (if applicable):
nagios-plugins-disk_smb-2.2.2-2.20190926git1b8ad57.el8.x86_64


Actual results:
type=PROCTITLE msg=audit(1579258574.965:24103): proctitle=6D7973716C61646D696E002D2D686F73743D3139322E3136382E332E313430002D2D757365723D726F6F74002D2D70617373776F72643D65757231736B3000737461747573
type=AVC msg=audit(1579258593.970:24104): avc:  denied  { getattr } for  pid=28408 comm="smbclient" path="/etc/samba/smb.conf" dev="dm-0" ino=502508 scontext=system_u:system_r:nagios_checkdisk_plugin_t:s0 tcontext=system_u:object_r:samba
_etc_t:s0 tclass=file permissive=0
type=SYSCALL msg=audit(1579258593.970:24104): arch=c000003e syscall=4 success=no exit=-13 a0=55b272588a20 a1=7ffd63b4d510 a2=7ffd63b4d510 a3=55b272552010 items=0 ppid=28407 pid=28408 auid=4294967295 uid=994 gid=991 euid=994 suid=994 fsui
d=994 egid=991 sgid=991 fsgid=991 tty=(none) ses=4294967295 comm="smbclient" exe="/usr/bin/smbclient" subj=system_u:system_r:nagios_checkdisk_plugin_t:s0 key=(null)^]ARCH=x86_64 SYSCALL=stat AUID="unset" UID="nagios" GID="nagios" EUID="n
agios" SUID="nagios" FSUID="nagios" EGID="nagios" SGID="nagios" FSGID="nagios"
type=PROCTITLE msg=audit(1579258593.970:24104): proctitle=2F7573722F62696E2F736D62636C69656E74002F2F38302E39332E3132382E342F44617469566F6C61002D5500766F6C612577656C636F6D65766F6C61002D6D00002D63006475
type=AVC msg=audit(1579258593.970:24105): avc:  denied  { read } for  pid=28408 comm="smbclient" name="smb.conf" dev="dm-0" ino=502508 scontext=system_u:system_r:nagios_checkdisk_plugin_t:s0 tcontext=system_u:object_r:samba_etc_t:s0 tcla
ss=file permissive=0
type=SYSCALL msg=audit(1579258593.970:24105): arch=c000003e syscall=257 success=no exit=-13 a0=ffffff9c a1=55b272588a20 a2=0 a3=0 items=0 ppid=28407 pid=28408 auid=4294967295 uid=994 gid=991 euid=994 suid=994 fsuid=994 egid=991 sgid=991 
fsgid=991 tty=(none) ses=4294967295 comm="smbclient" exe="/usr/bin/smbclient" subj=system_u:system_r:nagios_checkdisk_plugin_t:s0 key=(null)^]ARCH=x86_64 SYSCALL=openat AUID="unset" UID="nagios" GID="nagios" EUID="nagios" SUID="nagios" F
SUID="nagios" EGID="nagios" SGID="nagios" FSGID="nagios"
type=PROCTITLE msg=audit(1579258593.970:24105): proctitle=2F7573722F62696E2F736D62636C69656E74002F2F38302E39332E3132382E342F44617469566F6C61002D5500766F6C612577656C636F6D65766F6C61002D6D00002D63006475
type=AVC msg=audit(1579258593.970:24106): avc:  denied  { getattr } for  pid=28408 comm="smbclient" path="/etc/samba/smb.conf" dev="dm-0" ino=502508 scontext=system_u:system_r:nagios_checkdisk_plugin_t:s0 tcontext=system_u:object_r:samba
_etc_t:s0 tclass=file permissive=0
type=SYSCALL msg=audit(1579258593.970:24106): arch=c000003e syscall=4 success=no exit=-13 a0=55b272588b30 a1=7ffd63b4d520 a2=7ffd63b4d520 a3=1 items=0 ppid=28407 pid=28408 auid=4294967295 uid=994 gid=991 euid=994 suid=994 fsuid=994 egid=
991 sgid=991 fsgid=991 tty=(none) ses=4294967295 comm="smbclient" exe="/usr/bin/smbclient" subj=system_u:system_r:nagios_checkdisk_plugin_t:s0 key=(null)^]ARCH=x86_64 SYSCALL=stat AUID="unset" UID="nagios" GID="nagios" EUID="nagios" SUID
="nagios" FSUID="nagios" EGID="nagios" SGID="nagios" FSGID="nagios"
type=PROCTITLE msg=audit(1579258593.970:24106): proctitle=2F7573722F62696E2F736D62636C69656E74002F2F38302E39332E3132382E342F44617469566F6C61002D5500766F6C612577656C636F6D65766F6C61002D6D00002D63006475
type=AVC msg=audit(1579258593.970:24107): avc:  denied  { read } for  pid=28408 comm="smbclient" name="smb.conf" dev="dm-0" ino=502508 scontext=system_u:system_r:nagios_checkdisk_plugin_t:s0 tcontext=system_u:object_r:samba_etc_t:s0 tcla
ss=file permissive=0
type=SYSCALL msg=audit(1579258593.970:24107): arch=c000003e syscall=257 success=no exit=-13 a0=ffffff9c a1=55b272588b30 a2=0 a3=0 items=0 ppid=28407 pid=28408 auid=4294967295 uid=994 gid=991 euid=994 suid=994 fsuid=994 egid=991 sgid=991 
fsgid=991 tty=(none) ses=4294967295 comm="smbclient" exe="/usr/bin/smbclient" subj=system_u:system_r:nagios_checkdisk_plugin_t:s0 key=(null)^]ARCH=x86_64 SYSCALL=openat AUID="unset" UID="nagios" GID="nagios" EUID="nagios" SUID="nagios" F
SUID="nagios" EGID="nagios" SGID="nagios" FSGID="nagios"
type=PROCTITLE msg=audit(1579258593.970:24107): proctitle=2F7573722F62696E2F736D62636C69656E74002F2F38302E39332E3132382E342F44617469566F6C61002D5500766F6C612577656C636F6D65766F6C61002D6D00002D63006475
type=AVC msg=audit(1579258593.970:24108): avc:  denied  { create } for  pid=28408 comm="smbclient" scontext=system_u:system_r:nagios_checkdisk_plugin_t:s0 tcontext=system_u:system_r:nagios_checkdisk_plugin_t:s0 tclass=netlink_route_socke
t permissive=0
type=SYSCALL msg=audit(1579258593.970:24108): arch=c000003e syscall=41 success=no exit=-13 a0=10 a1=80003 a2=0 a3=0 items=0 ppid=28407 pid=28408 auid=4294967295 uid=994 gid=991 euid=994 suid=994 fsuid=994 egid=991 sgid=991 fsgid=991 tty=(none) ses=4294967295 comm="smbclient" exe="/usr/bin/smbclient" subj=system_u:system_r:nagios_checkdisk_plugin_t:s0 key=(null)^]ARCH=x86_64 SYSCALL=socket AUID="unset" UID="nagios" GID="nagios" EUID="nagios" SUID="nagios" FSUID="nagios" EGID="nagios" SGID="nagios" FSGID="nagios"


Additional info:
With "setenforce permissive" check_disk_smb works fine.