Simple export of a ext4 directory with NFS Ganesha 3.5 server in CentOS 8 without SELinux

NFS Ganesha is a user-mode file sharing server, which supports NFS 3 and 4.x versions and 9P. NFS Ganesha has several interesting plugins that support exporting files from the cluster and distributed file systems like Ceph and Glusterfs Exporting a file system with NFS Ganesha is simple enough if you do not use SELinux or SELinux is in permissive mode!
This article is to show how to export a server’s directory using NFS protocol Just to note the NFS-Ganesha is tested and supports ext2/ext3/ext4, xfs, brtfs, zfs file systems as of version 3.5 (check the manual for xfs, brtfs and zfs exports – here are sample configurations for them https://github.com/phdeniel/nfs-ganesha/tree/master/src/config_samples). To be able to export a file directory the VFS Ganesha plugin is used. A clean install of minimal CentOS 8 Stream is used so the installation log may differ significantly from the user’s log but the user will see all the dependencies, which are required for this setup.

STEP 1) Install the repository and NFS-Ganesha software

NFS-Ganesha 3 packages are from the CentOS Storage SIG repository, which is a good repository and may be trusted.

dnf install -y centos-release-nfs-ganesha30
dnf install -y nfs-ganesha nfs-ganesha-vfs

STEP 2) Configuration for exporting a directory.

There are two files under /etc/ganesha/:

ganesha.conf
vfs.conf

ganesha.conf includes global configuration and NFS share configuration. Each export path begins with the keyword EXPORT followed by a block ebraced by brackets {}.
vfs.conf includes a simple example for the VFS plugin, but this configuration file is not used by the NFS Ganesha server. It is just a sample file.
Here is a simple configuration, which exports /mnt/storage with Read/Write permissions to a single IP. Just add at the end of the file /etc/ganesha/ganesha.conf contains:

 
EXPORT
{
        Export_Id = 2;
        Path = /mnt/storage1;
        Pseudo = /mnt/storage1;
        Protocols = 3,4;
        Access_Type = RW;
        Squash = None;
        FSAL
        {
                Name = VFS;
        }
        CLIENT
        {
                Clients = 192.168.0.12;
        }
}

STEP 3) Start the server and mount the exported directory. Configure the firewall.

Start the server, enable the service to start on boot and then configure the firewall to pass the NFS requests:

systemctl start nfs-ganesha
systemctl enable nfs-ganesha
firewall-cmd --permanent --zone=public --add-service=nfs
firewall-cmd --reload


A more specific firewall rule to pass requests only from the single IP, which is included in the nfs-ganesha configuration (aka 192.168.0.12). Replace the above rule with (if the above rule was added it should be removed first):

firewall-cmd --permanent --zone=public --remove-service=nfs
firewall-cmd --permanent --zone=public --add-rich-rule="rule family="ipv4" source address="192.168.0.12" service name="nfs" accept"
firewall-cmd --reload

Only client with IP 192.168.0.12 could mount the export directory /mnt/storage1. The CLIENT block could be omitted or may be included multiple times redefining some of the parameters from the current EXPORT block or global configuration.
For more information https://github.com/phdeniel/nfs-ganesha/blob/master/src/config_samples/export.txt The user may check all available parameters for the EXPORT block!

And mounting the directory from client with IP 192.168.0.12:

mount 192.168.0.20:/mnt/storage1 /clients/storage1

/etc/fstab example line:

192.168.0.20:/mnt/storage1 /clients/storage1 nfs defaults,hard,intr,noexec,nosuid,_netdev,fsc,vers=4 0 0

The 192.168.0.20 is the server IP of NFS-Ganesha. The /mnt/storage1 is exported directory by NFS-Ganesha and /clients/storage1 is the directory, under which the NFS share will be mounted on the client machine (could be changed to any directory name).

The whole installation log

[root@srv ~]# dnf install -y centos-release-nfs-ganesha30
CentOS Stream 8 - AppStream                                                                                                                                  4.8 MB/s | 6.7 MB     00:01    
CentOS Stream 8 - BaseOS                                                                                                                                     1.2 MB/s | 2.3 MB     00:01    
CentOS Stream 8 - Extras                                                                                                                                      33 kB/s | 9.1 kB     00:00    
Last metadata expiration check: 0:00:01 ago on Tue Apr 13 09:13:20 2021.
Dependencies resolved.
=============================================================================================================================================================================================
 Package                                                       Architecture                           Version                                   Repository                              Size
=============================================================================================================================================================================================
Installing:
 centos-release-nfs-ganesha30                                  noarch                                 1.0-2.el8                                 extras                                 8.6 k
Installing dependencies:
 centos-release-storage-common                                 noarch                                 2-2.el8                                   extras                                 9.4 k

Transaction Summary
=============================================================================================================================================================================================
Install  2 Packages

Total download size: 18 k
Installed size: 2.0 k
Downloading Packages:
(1/2): centos-release-nfs-ganesha30-1.0-2.el8.noarch.rpm                                                                                                     149 kB/s | 8.6 kB     00:00    
(2/2): centos-release-storage-common-2-2.el8.noarch.rpm                                                                                                      103 kB/s | 9.4 kB     00:00    
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                                                         43 kB/s |  18 kB     00:00     
warning: /var/cache/dnf/extras-9705a089504ff150/packages/centos-release-nfs-ganesha30-1.0-2.el8.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID 8483c65d: NOKEY
CentOS Stream 8 - Extras                                                                                                                                     1.6 MB/s | 1.6 kB     00:00    
Importing GPG key 0x8483C65D:
 Userid     : "CentOS (CentOS Official Signing Key) <security@centos.org>"
 Fingerprint: 99DB 70FA E1D7 CE22 7FB6 4882 05B5 55B3 8483 C65D
 From       : /etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
Key imported successfully
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                                                                                                                                     1/1 
  Installing       : centos-release-storage-common-2-2.el8.noarch                                                                                                                        1/2 
  Installing       : centos-release-nfs-ganesha30-1.0-2.el8.noarch                                                                                                                       2/2 
  Verifying        : centos-release-nfs-ganesha30-1.0-2.el8.noarch                                                                                                                       1/2 
  Verifying        : centos-release-storage-common-2-2.el8.noarch                                                                                                                        2/2 

Installed:
  centos-release-nfs-ganesha30-1.0-2.el8.noarch                                                 centos-release-storage-common-2-2.el8.noarch                                                

Complete!
[root@srv ~]# dnf install -y nfs-ganesha nfs-ganesha-vfs
Last metadata expiration check: 0:11:01 ago on Tue Apr 13 09:14:00 2021.
Dependencies resolved.
=============================================================================================================================================================================================
 Package                                             Architecture                  Version                                                  Repository                                  Size
=============================================================================================================================================================================================
Installing:
 nfs-ganesha                                         x86_64                        3.5-1.el8                                                centos-nfs-ganesha3                        708 k
 nfs-ganesha-vfs                                     x86_64                        3.5-1.el8                                                centos-nfs-ganesha3                         69 k
Installing dependencies:
 avahi-libs                                          x86_64                        0.7-20.el8                                               baseos                                      62 k
 checkpolicy                                         x86_64                        2.9-1.el8                                                baseos                                     348 k
 cups-libs                                           x86_64                        1:2.2.6-38.el8                                           baseos                                     433 k
 gssproxy                                            x86_64                        0.8.0-19.el8                                             baseos                                     119 k
 keyutils                                            x86_64                        1.5.10-6.el8                                             baseos                                      63 k
 libicu                                              x86_64                        60.3-2.el8_1                                             baseos                                     8.8 M
 libntirpc                                           x86_64                        3.4-1.el8                                                centos-nfs-ganesha3                        136 k
 libverto-libevent                                   x86_64                        0.3.0-5.el8                                              baseos                                      16 k
 libwbclient                                         x86_64                        4.13.3-3.el8                                             baseos                                     119 k
 nfs-ganesha-selinux                                 noarch                        3.5-1.el8                                                centos-nfs-ganesha3                         38 k
 nfs-utils                                           x86_64                        1:2.3.3-41.el8                                           baseos                                     497 k
 policycoreutils-python-utils                        noarch                        2.9-14.el8                                               baseos                                     252 k
 psmisc                                              x86_64                        23.1-5.el8                                               baseos                                     151 k
 python3-audit                                       x86_64                        3.0-0.17.20191104git1c2f876.el8                          baseos                                      86 k
 python3-libsemanage                                 x86_64                        2.9-6.el8                                                baseos                                     127 k
 python3-policycoreutils                             noarch                        2.9-14.el8                                               baseos                                     2.2 M
 python3-pyyaml                                      x86_64                        3.12-12.el8                                              baseos                                     193 k
 python3-setools                                     x86_64                        4.3.0-2.el8                                              baseos                                     626 k
 quota                                               x86_64                        1:4.04-12.el8                                            baseos                                     213 k
 quota-nls                                           noarch                        1:4.04-12.el8                                            baseos                                      95 k
 rpcbind                                             x86_64                        1.2.5-8.el8                                              baseos                                      70 k
 samba-client-libs                                   x86_64                        4.13.3-3.el8                                             baseos                                     5.4 M
 samba-common                                        noarch                        4.13.3-3.el8                                             baseos                                     218 k
 samba-common-libs                                   x86_64                        4.13.3-3.el8                                             baseos                                     171 k
 userspace-rcu                                       x86_64                        0.10.1-4.el8                                             baseos                                     101 k

Transaction Summary
=============================================================================================================================================================================================
Install  27 Packages

Total download size: 21 M
Installed size: 72 M
Downloading Packages:
(1/27): nfs-ganesha-selinux-3.5-1.el8.noarch.rpm                                                                                                             582 kB/s |  38 kB     00:00    
(2/27): libntirpc-3.4-1.el8.x86_64.rpm                                                                                                                       1.7 MB/s | 136 kB     00:00    
(3/27): nfs-ganesha-vfs-3.5-1.el8.x86_64.rpm                                                                                                                 1.4 MB/s |  69 kB     00:00    
(4/27): nfs-ganesha-3.5-1.el8.x86_64.rpm                                                                                                                     3.8 MB/s | 708 kB     00:00    
(5/27): cups-libs-2.2.6-38.el8.x86_64.rpm                                                                                                                    894 kB/s | 433 kB     00:00    
(6/27): avahi-libs-0.7-20.el8.x86_64.rpm                                                                                                                     103 kB/s |  62 kB     00:00    
(7/27): gssproxy-0.8.0-19.el8.x86_64.rpm                                                                                                                     3.0 MB/s | 119 kB     00:00    
(8/27): keyutils-1.5.10-6.el8.x86_64.rpm                                                                                                                     822 kB/s |  63 kB     00:00    
(9/27): libverto-libevent-0.3.0-5.el8.x86_64.rpm                                                                                                             212 kB/s |  16 kB     00:00    
(10/27): checkpolicy-2.9-1.el8.x86_64.rpm                                                                                                                    446 kB/s | 348 kB     00:00    
(11/27): libwbclient-4.13.3-3.el8.x86_64.rpm                                                                                                                 897 kB/s | 119 kB     00:00    
(12/27): policycoreutils-python-utils-2.9-14.el8.noarch.rpm                                                                                                  1.4 MB/s | 252 kB     00:00    
(13/27): nfs-utils-2.3.3-41.el8.x86_64.rpm                                                                                                                   1.8 MB/s | 497 kB     00:00    
(14/27): psmisc-23.1-5.el8.x86_64.rpm                                                                                                                        945 kB/s | 151 kB     00:00    
(15/27): python3-audit-3.0-0.17.20191104git1c2f876.el8.x86_64.rpm                                                                                            613 kB/s |  86 kB     00:00    
(16/27): python3-libsemanage-2.9-6.el8.x86_64.rpm                                                                                                            2.0 MB/s | 127 kB     00:00    
(17/27): python3-pyyaml-3.12-12.el8.x86_64.rpm                                                                                                               2.6 MB/s | 193 kB     00:00    
(18/27): python3-setools-4.3.0-2.el8.x86_64.rpm                                                                                                              2.5 MB/s | 626 kB     00:00    
(19/27): quota-4.04-12.el8.x86_64.rpm                                                                                                                        3.5 MB/s | 213 kB     00:00    
(20/27): quota-nls-4.04-12.el8.noarch.rpm                                                                                                                    2.5 MB/s |  95 kB     00:00    
(21/27): rpcbind-1.2.5-8.el8.x86_64.rpm                                                                                                                      1.0 MB/s |  70 kB     00:00    
(22/27): python3-policycoreutils-2.9-14.el8.noarch.rpm                                                                                                       1.7 MB/s | 2.2 MB     00:01    
(23/27): samba-common-4.13.3-3.el8.noarch.rpm                                                                                                                1.3 MB/s | 218 kB     00:00    
(24/27): samba-common-libs-4.13.3-3.el8.x86_64.rpm                                                                                                           1.4 MB/s | 171 kB     00:00    
(25/27): userspace-rcu-0.10.1-4.el8.x86_64.rpm                                                                                                               1.1 MB/s | 101 kB     00:00    
(26/27): samba-client-libs-4.13.3-3.el8.x86_64.rpm                                                                                                           3.7 MB/s | 5.4 MB     00:01    
(27/27): libicu-60.3-2.el8_1.x86_64.rpm                                                                                                                      2.7 MB/s | 8.8 MB     00:03    
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                                                        4.0 MB/s |  21 MB     00:05     
warning: /var/cache/dnf/centos-nfs-ganesha3-a441f11834edc8e2/packages/libntirpc-3.4-1.el8.x86_64.rpm: Header V4 RSA/SHA1 Signature, key ID e451e5b5: NOKEY
CentOS-8 - NFS Ganesha 3                                                                                                                                     200 kB/s | 1.0 kB     00:00    
Importing GPG key 0xE451E5B5:
 Userid     : "CentOS Storage SIG (http://wiki.centos.org/SpecialInterestGroup/Storage) <security@centos.org>"
 Fingerprint: 7412 9C0B 173B 071A 3775 951A D4A2 E50B E451 E5B5
 From       : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Storage
Key imported successfully
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                                                                                                                                     1/1 
  Installing       : userspace-rcu-0.10.1-4.el8.x86_64                                                                                                                                  1/27 
  Running scriptlet: userspace-rcu-0.10.1-4.el8.x86_64                                                                                                                                  1/27 
  Installing       : libntirpc-3.4-1.el8.x86_64                                                                                                                                         2/27 
  Running scriptlet: samba-common-4.13.3-3.el8.noarch                                                                                                                                   3/27 
  Installing       : samba-common-4.13.3-3.el8.noarch                                                                                                                                   3/27 
  Running scriptlet: samba-common-4.13.3-3.el8.noarch                                                                                                                                   3/27 
  Running scriptlet: rpcbind-1.2.5-8.el8.x86_64                                                                                                                                         4/27 
  Installing       : rpcbind-1.2.5-8.el8.x86_64                                                                                                                                         4/27 
  Running scriptlet: rpcbind-1.2.5-8.el8.x86_64                                                                                                                                         4/27 
  Installing       : avahi-libs-0.7-20.el8.x86_64                                                                                                                                       5/27 
  Installing       : cups-libs-1:2.2.6-38.el8.x86_64                                                                                                                                    6/27 
  Installing       : quota-nls-1:4.04-12.el8.noarch                                                                                                                                     7/27 
  Installing       : quota-1:4.04-12.el8.x86_64                                                                                                                                         8/27 
  Installing       : python3-setools-4.3.0-2.el8.x86_64                                                                                                                                 9/27 
  Installing       : python3-pyyaml-3.12-12.el8.x86_64                                                                                                                                 10/27 
  Installing       : python3-libsemanage-2.9-6.el8.x86_64                                                                                                                              11/27 
  Installing       : python3-audit-3.0-0.17.20191104git1c2f876.el8.x86_64                                                                                                              12/27 
  Installing       : psmisc-23.1-5.el8.x86_64                                                                                                                                          13/27 
  Installing       : libverto-libevent-0.3.0-5.el8.x86_64                                                                                                                              14/27 
  Installing       : gssproxy-0.8.0-19.el8.x86_64                                                                                                                                      15/27 
  Running scriptlet: gssproxy-0.8.0-19.el8.x86_64                                                                                                                                      15/27 
  Installing       : libicu-60.3-2.el8_1.x86_64                                                                                                                                        16/27 
  Running scriptlet: libicu-60.3-2.el8_1.x86_64                                                                                                                                        16/27 
  Installing       : libwbclient-4.13.3-3.el8.x86_64                                                                                                                                   17/27 
  Installing       : samba-common-libs-4.13.3-3.el8.x86_64                                                                                                                             18/27 
  Installing       : samba-client-libs-4.13.3-3.el8.x86_64                                                                                                                             19/27 
  Installing       : keyutils-1.5.10-6.el8.x86_64                                                                                                                                      20/27 
  Running scriptlet: nfs-utils-1:2.3.3-41.el8.x86_64                                                                                                                                   21/27 
  Installing       : nfs-utils-1:2.3.3-41.el8.x86_64                                                                                                                                   21/27 
  Running scriptlet: nfs-utils-1:2.3.3-41.el8.x86_64                                                                                                                                   21/27 
  Installing       : checkpolicy-2.9-1.el8.x86_64                                                                                                                                      22/27 
  Installing       : python3-policycoreutils-2.9-14.el8.noarch                                                                                                                         23/27 
  Installing       : policycoreutils-python-utils-2.9-14.el8.noarch                                                                                                                    24/27 
  Running scriptlet: nfs-ganesha-selinux-3.5-1.el8.noarch                                                                                                                              25/27 
  Installing       : nfs-ganesha-selinux-3.5-1.el8.noarch                                                                                                                              25/27 
  Running scriptlet: nfs-ganesha-selinux-3.5-1.el8.noarch                                                                                                                              25/27 


  Running scriptlet: nfs-ganesha-3.5-1.el8.x86_64                                                                                                                                      26/27 
  Installing       : nfs-ganesha-3.5-1.el8.x86_64                                                                                                                                      26/27 
  Running scriptlet: nfs-ganesha-3.5-1.el8.x86_64                                                                                                                                      26/27 
  Installing       : nfs-ganesha-vfs-3.5-1.el8.x86_64                                                                                                                                  27/27 
  Running scriptlet: libwbclient-4.13.3-3.el8.x86_64                                                                                                                                   27/27 
  Running scriptlet: nfs-ganesha-3.5-1.el8.x86_64                                                                                                                                      27/27 
  Running scriptlet: nfs-ganesha-vfs-3.5-1.el8.x86_64                                                                                                                                  27/27 
  Verifying        : libntirpc-3.4-1.el8.x86_64                                                                                                                                         1/27 
  Verifying        : nfs-ganesha-3.5-1.el8.x86_64                                                                                                                                       2/27 
  Verifying        : nfs-ganesha-selinux-3.5-1.el8.noarch                                                                                                                               3/27 
  Verifying        : nfs-ganesha-vfs-3.5-1.el8.x86_64                                                                                                                                   4/27 
  Verifying        : avahi-libs-0.7-20.el8.x86_64                                                                                                                                       5/27 
  Verifying        : checkpolicy-2.9-1.el8.x86_64                                                                                                                                       6/27 
  Verifying        : cups-libs-1:2.2.6-38.el8.x86_64                                                                                                                                    7/27 
  Verifying        : gssproxy-0.8.0-19.el8.x86_64                                                                                                                                       8/27 
  Verifying        : keyutils-1.5.10-6.el8.x86_64                                                                                                                                       9/27 
  Verifying        : libicu-60.3-2.el8_1.x86_64                                                                                                                                        10/27 
  Verifying        : libverto-libevent-0.3.0-5.el8.x86_64                                                                                                                              11/27 
  Verifying        : libwbclient-4.13.3-3.el8.x86_64                                                                                                                                   12/27 
  Verifying        : nfs-utils-1:2.3.3-41.el8.x86_64                                                                                                                                   13/27 
  Verifying        : policycoreutils-python-utils-2.9-14.el8.noarch                                                                                                                    14/27 
  Verifying        : psmisc-23.1-5.el8.x86_64                                                                                                                                          15/27 
  Verifying        : python3-audit-3.0-0.17.20191104git1c2f876.el8.x86_64                                                                                                              16/27 
  Verifying        : python3-libsemanage-2.9-6.el8.x86_64                                                                                                                              17/27 
  Verifying        : python3-policycoreutils-2.9-14.el8.noarch                                                                                                                         18/27 
  Verifying        : python3-pyyaml-3.12-12.el8.x86_64                                                                                                                                 19/27 
  Verifying        : python3-setools-4.3.0-2.el8.x86_64                                                                                                                                20/27 
  Verifying        : quota-1:4.04-12.el8.x86_64                                                                                                                                        21/27 
  Verifying        : quota-nls-1:4.04-12.el8.noarch                                                                                                                                    22/27 
  Verifying        : rpcbind-1.2.5-8.el8.x86_64                                                                                                                                        23/27 
  Verifying        : samba-client-libs-4.13.3-3.el8.x86_64                                                                                                                             24/27 
  Verifying        : samba-common-4.13.3-3.el8.noarch                                                                                                                                  25/27 
  Verifying        : samba-common-libs-4.13.3-3.el8.x86_64                                                                                                                             26/27 
  Verifying        : userspace-rcu-0.10.1-4.el8.x86_64                                                                                                                                 27/27 

Installed:
  avahi-libs-0.7-20.el8.x86_64            checkpolicy-2.9-1.el8.x86_64                      cups-libs-1:2.2.6-38.el8.x86_64         gssproxy-0.8.0-19.el8.x86_64                           
  keyutils-1.5.10-6.el8.x86_64            libicu-60.3-2.el8_1.x86_64                        libntirpc-3.4-1.el8.x86_64              libverto-libevent-0.3.0-5.el8.x86_64                   
  libwbclient-4.13.3-3.el8.x86_64         nfs-ganesha-3.5-1.el8.x86_64                      nfs-ganesha-selinux-3.5-1.el8.noarch    nfs-ganesha-vfs-3.5-1.el8.x86_64                       
  nfs-utils-1:2.3.3-41.el8.x86_64         policycoreutils-python-utils-2.9-14.el8.noarch    psmisc-23.1-5.el8.x86_64                python3-audit-3.0-0.17.20191104git1c2f876.el8.x86_64   
  python3-libsemanage-2.9-6.el8.x86_64    python3-policycoreutils-2.9-14.el8.noarch         python3-pyyaml-3.12-12.el8.x86_64       python3-setools-4.3.0-2.el8.x86_64                     
  quota-1:4.04-12.el8.x86_64              quota-nls-1:4.04-12.el8.noarch                    rpcbind-1.2.5-8.el8.x86_64              samba-client-libs-4.13.3-3.el8.x86_64                  
  samba-common-4.13.3-3.el8.noarch        samba-common-libs-4.13.3-3.el8.x86_64             userspace-rcu-0.10.1-4.el8.x86_64      

Complete!
[root@srv ~]# tail -n 17 /etc/ganesha/ganesha.conf
EXPORT
{
        Export_Id = 2;
        Path = /mnt/storage1;
        Pseudo = /mnt/storage1;
        Protocols = 3,4;
        Access_Type = RW;
        Squash = None;
        FSAL
        {
                Name = VFS;
        }
        CLIENT
        {
                Clients = 192.168.0.12;
        }
}
[root@srv ~]# systemctl status nfs-ganesha
● nfs-ganesha.service - NFS-Ganesha file server
   Loaded: loaded (/usr/lib/systemd/system/nfs-ganesha.service; disabled; vendor preset: disabled)
   Active: active (running) since Tue 2021-04-13 09:51:01 UTC; 3s ago
     Docs: http://github.com/nfs-ganesha/nfs-ganesha/wiki
  Process: 3070 ExecStart=/bin/bash -c ${NUMACTL} ${NUMAOPTS} /usr/bin/ganesha.nfsd ${OPTIONS} ${EPOCH} (code=exited, status=0/SUCCESS)
 Main PID: 3071 (ganesha.nfsd)
    Tasks: 21 (limit: 11409)
   Memory: 6.2M
   CGroup: /system.slice/nfs-ganesha.service
           └─3071 /usr/bin/ganesha.nfsd -L /var/log/ganesha/ganesha.log -f /etc/ganesha/ganesha.conf -N NIV_EVENT

Apr 13 09:51:01 srv systemd[1]: Starting NFS-Ganesha file server...
Apr 13 09:51:01 srv systemd[1]: Started NFS-Ganesha file server.
Apr 13 09:51:01 srv ganesha.nfsd[3071]: libnfsidmap: Unable to determine the NFSv4 domain; Using 'localdomain' as the NFSv4 domain which means UIDs will be mapped to the 'Nobody-User' user>
Apr 13 09:51:01 srv ganesha.nfsd[3071]: libnfsidmap: using (default) domain: localdomain
Apr 13 09:51:01 srv ganesha.nfsd[3071]: libnfsidmap: Realms list: 'LOCALDOMAIN'
Apr 13 09:51:01 srv ganesha.nfsd[3071]: libnfsidmap: loaded plugin /usr/lib64/libnfsidmap/nsswitch.so for method nsswitch
[root@srv ~]# systemctl enable nfs-ganesha
Created symlink /etc/systemd/system/multi-user.target.wants/nfs-ganesha.service → /usr/lib/systemd/system/nfs-ganesha.service.
[root@srv ~]# firewall-cmd --permanent --zone=public --add-service=nfs
success
[root@srv ~]# firewall-cmd --reload
success
[root@srv ~]# firewall-cmd --list-all
public (active)
  target: default
  icmp-block-inversion: no
  interfaces: enp0s3
  sources: 
  services: cockpit dhcpv6-client nfs ssh
  ports: 
  protocols: 
  forward: no
  masquerade: no
  forward-ports: 
  source-ports: 
  icmp-blocks: 
  rich rules
[root@srv ~]# firewall-cmd --permanent --zone=public --remove-service=nfs
success
[root@srv ~]# firewall-cmd --permanent --zone=public --add-rich-rule="rule family="ipv4" source address="192.168.0.12" service name="nfs" accept"
success
[root@srv ~]# firewall-cmd --reload
success
[root@srv ~]# firewall-cmd --list-all
public (active)
  target: default
  icmp-block-inversion: no
  interfaces: enp0s3
  sources: 
  services: cockpit dhcpv6-client ssh
  ports: 
  protocols: 
  forward: no
  masquerade: no
  forward-ports: 
  source-ports: 
  icmp-blocks: 
  rich rules: 
        rule family="ipv4" source address="192.168.0.12" service name="nfs" accept

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