Document URL: 
https://access.redhat.com/documentation/en-US/Red_Hat_Storage/3.1/html/Administration_Guide/sect-NFS.html#sect-NFS_Ganesha

Section Number and Name: 
7.2.4.4.3. Exporting and Unexporting Volumes through NFS-Ganesha
Subsection:
--> Verifying the Status --> Check if the volume is exported. 

Describe the issue: 
showmount is not listing exported volume if protocols version is set only to 4 in volume export file.

Suggestions for improvement: 
It would be good if we have a note saying, showmount will not list the exported volume if the user has set the protocol version to (Protocols = "4" ;) in volume export file.

In that case to list the exported volume, the following command should be used.

dbus-send --type=method_call --print-reply --system  --dest=org.ganesha.nfsd /org/ganesha/nfsd/ExportMgr  org.ganesha.nfsd.exportmgr.ShowExports

Additional information: 

root@dhcp46-42 ~]# cat /run/gluster/shared_storage/nfs-ganesha/exports/export.vol2.conf 
# WARNING : Using Gluster CLI will overwrite manual
# changes made to this file. To avoid it, edit the
# file and run ganesha-ha.sh --refresh-config.
EXPORT{
      Export_Id = 2;
      Path = "/vol2";
      FSAL {
           name = GLUSTER;
           hostname="localhost";
          volume="vol2";
           }
      Access_type = RW;
      Disable_ACL = true;
      Squash="No_root_squash";
      Pseudo="/vol2";
      Protocols = "4" ;
      Transports = "UDP","TCP";
      SecType = "sys";
     }
[root@dhcp46-42 ~]# showmount -e localhost
Export list for localhost:
[root@dhcp46-42 ~]# dbus-send --type=method_call --print-reply --system  --dest=org.ganesha.nfsd /org/ganesha/nfsd/ExportMgr  org.ganesha.nfsd.exportmgr.ShowExports
method return sender=:1.236 -> dest=:1.252 reply_serial=2
   struct {
      uint64 1481120920
      uint64 151203001
   }
   array [
      struct {
         uint16 0
         string "/"
         boolean false
         boolean false
         boolean false
         boolean false
         boolean false
         boolean false
         boolean false
         boolean false
         struct {
            uint64 1481105915
            uint64 307991952
         }
      }
      struct {
         uint16 2
         string "/vol2"
         boolean false
         boolean false
         boolean false
         boolean false
         boolean false
         boolean false
         boolean false
         boolean false
         struct {
            uint64 1481105915
            uint64 307991952
         }
      }
   ]
[root@dhcp46-42 ~]#