I have 2 ESXi 6.5 hosts connected via NFS to my OMV box. All of this runs over 10GB through mellanox connectx-3 cards. Over the past few days the virtual machines that resides on the NFS shares have been having issues and most recently, the ESXi hosts lost complete connectivity to the shares. I am not seeing anything in the syslog related to NFS. Most virtual machines are running on a RAID 1 pair of SSDs so IOPS shouldnt be an issue. Since there is nothing in the syslog is their anywhere else I can look for clues? Below is a copy of my etc/exports, any help would be appreciated. The async parameter on the SSD_VMs export is something i had read could increase performance so I am testing it out.
# This configuration file is auto-generated.
# WARNING: Do not edit this file, your changes will be lost.
# /etc/exports: the access control list for filesystems which may be exported
# to NFS clients.See exports(5).
# NFSv4 - pseudo filesystem root