Note. When you start a VM or a VM disk from a backup, Veeam Backup & Replication "publishes . Updating the Size of Your Multipath Device, 25.17.4. To add Datastore on VMware Host Client, Configure like follows. If you can, try and stop/start, restart, or refresh your nfs daemon on the NFS server. A place where magic is studied and practiced? The NFS folders. Services used for ESXi network management might not be responsible and you may not be able to manage a host remotely, for example, via SSH. [2011-11-23 09:52:43 'IdeScsiInterface' warning] Scanning of ide interfaces not supported hostd is a host agent responsible for managing most of the operations on an ESXi host and registering VMs, visible LUNs, and VMFS volumes. Integrated Volume Management of Multiple Devices, 6.4.1. Here's how to enable NFS in our Linkstation. Javelin, I will try it. This section will assume you already have setup a Kerberos server, with a running KDC and admin services. vpxa is the VMware agent activated on an ESXi host when the ESXi host joins vCenter Server. This is the most efficient way to make . I am using Solaris X86 as my NFS host. The product can be installed on Windows, Linux, NAS devices, and as a VMware virtual appliance. In Ubuntu 22.04 LTS (jammy), this option is controlled in /etc/nfs.conf in the [gssd] section: In older Ubuntu releases, the command line options for the rpc.gssd daemon are not exposed in /etc/default/nfs-common, therefore a systemd override file needs to be created. Improvements in autofs Version 5 over Version 4, 8.3.3. net-lbt started. I can vmkping to the NFS server. NFS Linux . You can run the conversion tool manually to gather more information about the error: its in /usr/share/nfs-common/nfsconvert.py and must be run as root. Let's look into the details of each step now. Make sure the Veeam vPower NFS Service is running on the Mount Server. It only takes a minute to sign up. Log in to the vSphere Client, and then select the ESXi host from the inventory pane. open-e tries to make a bugfix in their NFS server to fix this problem. NVMe over fabrics using RDMA", Collapse section "29.1. Both qnaps are still serving data to the working host over NFS, they are just not accepting new connections. Check if another NFS Server software is locking port 111 on the Mount Server. The iSCSI storage adapter. Restart the Server for NFS service. Maybe esx cannot resolve the netbios name? The steps to allow NFS with iptables are as follows: 1. The /etc/exports Configuration File, How Intuit democratizes AI development across teams through reusability. Starting openwsmand In the next steps, we will create the Test VM on this NFS share. The first step in doing this is to add the followng entry to /etc/hosts.deny: portmap:ALL Starting with nfs-utils 0.2.0, you can be a bit more careful by controlling access to individual daemons. Running vmware-vpxa stop In this article, I'll discuss how I chose which Linux distribution to use, how I set up NFS on Linux and connected ESXi to NFS. Is it known that BQP is not contained within NP? Before we can add our datastore back we need to first get rid of it. Authorized Network - type your network address and then click SUBMIT. Restarting the ESXi host can help you in some cases. Starting slpd I recently had the opportunity to set up a vSphere environment, but, due to the cost of Windows Server, it didn't make sense to use Windows as an NFS server for this project. Does anyone have any experience of restarting NFS services on live, working datastores? Creating a Pre and Post Snapshot Pair", Expand section "14.3. Introduction to NFS", Expand section "8.2. And then eventually .. the mount-point on client-1 got unresponsive (Can't open its files, etc). Using VMware Host Client is convenient for restarting VMware vCenter Agent, vpxa, which is used for connectivity between an ESXi host and vCenter. Creating a Post Snapshot with Snapper, 14.2.1.3. Restart all services on ESXi through SSH By admin on November 23, 2011 in General I had an issue on one of my ESXi hosts in my home lab this morning, where it seemed the host had become completely un-responsive. Although I was tempted to use purpose-built storage software, such as FreeNAS or OpenFiler, for this project, I decided instead to go with a general-purpose OS as I may want to have the system deliver other services later on. The kerberos packages are not strictly necessary, as the necessary keys can be copied over from the KDC, but it makes things much easier. From the top menu, click Restart, Start, or Stop. Configuring an iface for Software iSCSI, 25.14.3. If you want to ensure that VMs are not affected, try to ping one of the VMs running on the ESXi host and restart VMware agents on this ESXi host. Using Compression", Expand section "30.5. could you post your /etc/dfs/dfstab - are there hostnames in there ? Troubleshooting NVDIMM", Collapse section "28.5. There are a number of optional settings for NFS mounts for tuning performance, tightening security, or providing conveniences. excerpt Naturally we suspected that the esxi was the culprit, being the 'single point' of failure. He has also worked as a Senior Validation Engineer with The Taneja Group, where he headed the Validation Service Lab and was instrumental in starting up its vSphere Virtual Volumes practice. To see if the NFS share was accessible to my ESXi servers, I logged on to my vCenter Client, and then selected Storage from the dropdown menu (Figure 5). Displaying Information about All Detected Devices, 16.2.3. Each file system in this table is referred There is also the instance in which vpxd on vCenter Server communicates with vpxa on ESXi hosts (vpxa is the VMware agent running on the ESXi side and vpxd is the daemon running on the vCenter side). Integrated Volume Management of Multiple Devices", Expand section "8. Enter the IP address of your ESXi host in the address bar of a web browser. Let's say in /etc/exports: Then whenever i made some changes in that (let's say the changes ONLY for client-2), e.g: Then i always service nfs restart. Using this option usually improves performance, but at the cost that an unclean server restart (i.e. Configuring Persistent Memory for use in Device DAX mode. External Array Management (libStorageMgmt)", Collapse section "27. Using volume_key in a Larger Organization", Collapse section "20.3. net-lbt stopped. After the installation was complete, I opened a terminal and entered the following commands to become a root user and install NFS (Figure 2): I verified that NFS v4.1 was supported by entering (Figure 3): Next, I created a directory to share titled TestNFSDir, and then changed the ownership and permissions on it. Configuring Maximum Time for Error Recovery with eh_deadline, 26. There are some commercial and open sources implementations though, of which [] GitHub - winnfsd/winnfsd seems the best maintained open source one.In case I ever need NFS server support, I need to check out . NAKIVO Blog > VMware Administration and Backup > How to Restart Management Agents on a VMware ESXi Host. Configuring an Exported File System for Diskless Clients, 25.1.7. Naturally we suspected that the esxi was the culprit, being the 'single point' of failure. exportfs -a systemctl restart nfs-kernel-server ufw allow from 10.0.0.0/24 to any port nfs ufw status I then entered showmount -e to see the NFS folders/files that were available ( Figure 4 ). But you will have to shut down virtual machines (VMs) or migrate them to another host, which is a problem in a production environment. 2. NFS + Kerberos: access denied by server while mounting, nfs mount failed: reason given by server: No such file or directory, NFS mount a directory from server node to client node. On the next page, enter the details in Stage 1 of this article, and click Next. Each file has a small explanation about the available settings. Policy *. There is a note in the NFS share section on DSS that says the following "If the host has an entry in the DNS field but does not have a reverse DNS entry, the connection to NFS will fail.". By using NFS, users and programs can access files on remote systems almost as if they were local files. In addition to these general recommendations, use specific guidelines that apply to NFS in vSphere environment. Btrfs (Technology Preview)", Expand section "6.4. Redundant Array of Independent Disks (RAID)", Expand section "19. The general syntax for the line in /etc/fstab file is as follows: NFS is comprised of several services, both on the server and the client. # host=myhostname. I then clicked Configure, which showed the properties and capacity for the NFS share (Figure 6). Disabling DCUI logins Running lbtd stop Running storageRM stop Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? The biggest difference between NFS v3 and v4.1 is that v4.1 supports multipathing. Bottom line, this checkbox is pretty much critical for NFS on Windows Server 2012 R2. Replacing Failed Devices on a btrfs File System, 6.4.7. Is there a proper earth ground point in this switch box? Server Message Block (SMB)", Expand section "9.2. This is the most efficient way to make configuration changes take effect after editing the configuration file for NFS. sensord is not running. The final step in configuring the server is allowing NFS services through the firewall on the CentOS 8 server machine. Engage with our Red Hat Product Security team, access security updates, and ensure your environments are not exposed to any known security vulnerabilities. NFS. Accessing RPC Quota through a Firewall, 8.7.1. Monitoring pNFS SCSI Layouts Functionality", Expand section "9. The nfs.systemd(7) manpage has more details on the several systemd units available with the NFS packages. Listing Currently Mounted File Systems", Expand section "19.2. Wrapping a Command in Pre and Post Snapshots, 14.2.2. Changing the Read/Write State of an Online Logical Unit", Collapse section "25.17.4. Restart the NFS service on the server. Install NFS on CentOS 8. These helper services may be located in random ports, and they are discovered by contacting the RPC port mapper (usually a process named rpcbind on modern Linuxes). Create a directory/folder in your desired disk partition. Running vobd restart Comparing Changes with the diff Command, 14.3.3. Features of XFS Backup and Restoration, 3.7.3. Just keep in mind that /etc/nfs.conf is not the whole story: always inspect /etc/nfs.conf.d as well, as it may contain files overriding the defaults. All that's required is to issue the appropriate command after editing the /etc/exports file: Excerpt from the official Red Hat documentation titled: 21.7. Is a PhD visitor considered as a visiting scholar? Creating and Maintaining Snapshots with Snapper, 14.1. How To Set Up an NFS Server on Windows Server 2012, Enabling Cloud Native Access to Internal Web Apps with Amazon WorkSpaces Web, Hands On with Windows 365 Business Edition, Introduction to Docker, Part 3: Networking, Feds Say Software Makers Must 'Be Held Liable' for Cybersecurity Failures, 6 'Quick Wins' for Endpoint Security Management (and 6 'Complex Wins'), AI Coming for Your Job? Does a summoned creature play immediately after being summoned by a ready action? I have only a ugly solution for this problem. Step 3) Configuring the firewall rules for NFS Server. Specify the settings for your VM. Running vmware-vpxa restart # Number of nfs server processes to be started. There is a new command-line tool called nfsconf(8) which can be used to query or even set configuration parameters in nfs.conf. In order to enable remote SSH access, go to. However, is your NexentaStor configured to use a DNS server which is unavailable because its located on a NFS datastore? Configuring Disk Quotas", Collapse section "17.1. When you configure NFS servers to work with ESXi, follow recommendation of your storage vendor. There are two ways to configure exports on an NFS server: Manually editing the NFS configuration file, that is, /etc/exports, and. Running wsman restart Configuring a Fibre Channel over Ethernet Interface, 25.6. If you want to use ESXi shell directly (without remote access), you must enable ESXi shell, and use a keyboard and monitor physically attached to the ESXi server. NFS Security with AUTH_SYS and Export Controls, 8.10.2. The tables below summarize all available services, which meta service they are linked to, and which configuration file each service uses. Running hostd stop Running sensord restart Your email address will not be published. I then made sure the DNS server was up and that DSS could ping both the internal and OPENDNS servers. Creating an LVM2 Logical Volume for Swap, 15.2.1. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. It is not supported on models with the the following package architectures : Mounting a File System", Collapse section "19.2. To unmount it, open VMWare vSphere Web Client and select Storage tab, from the list select NFS datastore, right click on it and select Unmount datastore. You can start the TSM-SSH service to enable remote SSH access to the ESXi host. Comparing Changes with the xadiff Command, 14.4. I then rebooted the DSS and waited for it to come up before starting up ESXi (as you suggested). Device Mapper Multipathing (DM Multipath) and Storage for Virtual Machines, 27. Causes. NFS "systemctl" RHEL CentOS NFS watchdog-usbarbitrator: Terminating watchdog with PID 5625 Earlier Ubuntu releases use the traditional configuration mechanism for the NFS services via /etc/defaults/ configuration files. Applies to: Windows Server 2022, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012. If you are connecting directly to an ESXi host to manage the host, then communication is established directly to the hostd process on the host for management. System Requirements", Collapse section "30.2. Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use. Overview LogicMonitor uses the VMware API to provide comprehensive monitoring of VMware vCenter or standalone ESXi hosts. For example, exporting /storage using krb5p: The security options are explained in the exports(5) manpage, but generally they are: The NFS client has a similar set of steps. Both SMB and NFS share files rather than block devices as iSCSI does. Configuring iSCSI Offload and Interface Binding", Expand section "25.17. Stopping vmware-vpxa:success, Running wsman stop Let me start by listing the common symptoms for the need to restart ESXi management agents on a server: Virtual machine creation may fail because the agent is unable to retrieve VM creation options from the host, The operation is not allowed in the current connection state of the host. Storage System I/O", Collapse section "30.6.3.3. The NAS server must not provide both protocol versions for the same share. Setup Requirements Creating a Read-only User for an ESXi Host or vCenter Server As highlighted in the next two sections, the process Continued Network File System (NFS)", Collapse section "8. In the File Service -> Click Enabled. In my case though, I have never used DNS for this purpose. In the context menu under Storage, select New Datastore. This is a INI-style config file, see the nfs.conf(5) manpage for details. There are plenty of reasons why you'd want to share files across computers on your network, and Debian makes a perfect file server, whether you're running it from a workstation, dedicated server, or even a Raspberry Pi. [Click on image for larger view.] [2011-11-23 09:52:43 'IdeScsiInterface' warning] Scanning of ide interfaces not supported Running slpd stop Installing NFS Server on Windows Server 2016. Then enter credentials for an administrative account on ESXi to log in to VMware Host Client. The opinions discussed on this site are strictly mine and not the views of Dell EMC, Veeam, VMware, Virtualytics or The David Hill Group Limited. Removing VDO Volumes", Expand section "30.4.5. Policy, Download NAKIVO Backup & Replication Free Edition, A Full Overview of VMware Virtual Machine Performance Problems, Fix VMware Error: Virtual Machine Disks Consolidation Needed, How to Create a Virtual Machine Using vSphere Client 7.0, Oracle Database Administration and Backup, NAKIVO Backup & Replication Components: Transporter, Virtual Appliance Simplicity, Efficiency, and Scalability, Introducing VMware Distributed Switch: What, Why, and How. The ext4 File System", Expand section "6. Creating a Snapper Snapshot", Expand section "14.2.1. If you can, try and stop/start, restart, or refresh your nfs daemon on the NFS server. The volume_key Function", Expand section "20.3. Next, update the package repository: sudo apt update. UNIX is a registered trademark of The Open Group. Select a service from the service list. Async and Sync in NFS mount When upgrading to Ubuntu 22.04 LTS (jammy) from a release that still uses the /etc/defaults/nfs-* configuration files, the following will happen: If this conversion script fails, then the package installation will fail. usbarbitrator stopped. You can either run: And paste the following into the editor that will open: Or manually create the file /etc/systemd/system/rpc-gssd.service.d/override.conf and any needed directories up to it, with the contents above. To learn more, see our tips on writing great answers. But the problem is I have restarted the whole server and even reinstalled the NFS server, it still doesn't work. This will cause datastore downtime of a few seconds - how would this affect esxi 4.1, windows, linux and oracle? External Array Management (libStorageMgmt)", Expand section "28. Only you can determine which ports you need to allow depending on which services are . Files and Directories That Retain Write Permissions, 20.2. Minimum order size for Essentials is 2 sockets, maximum - 6 sockets. In addition to these general recommendations, use specific guidelines that apply to NFS in vSphere environment. Configuring iSCSI Offload and Interface Binding, 25.14.1. Text. SSH access and ESXi shell are disabled by default. Depending on whether or not you have any VMs registered on the datastore and host you may get an error, you may not Ive found it varies Anyways, lastly we simply need to mount the datastore back to our host using the following command Be sure to use the exact same values you gathered from the nfs list command. ESXi management agents are used to synchronize VMware components and make it possible to access an ESXi host from vCenter Server. There should be no files or subdirectories in the /opt/example directory, else they will become inaccessible until the nfs filesystem is unmounted. Before I start, however, I should first briefly discuss NFS, and two other attached storage protocols, iSCSI and Server Message Block (SMB). [419990] Begin 'hostd ++min=0,swap,group=hostd /etc/vmware/hostd/config.xml', min-uptime = 60, max-quick-failures = 1, max-total-failures = 1000000 Test Environment Preparations", Collapse section "31.2. Simply navigate to the user share ( Shares > [Click on the user share you want to export via NFS] > NFS Security Settings > Export: Yes ): Exporting an NFS Share on unRAID. You should now have a happy healthy baby NFS datastore back into your storage pool. I still had the same problem with our open-e DSS NFs storage. Your email address will not be published. To do that, run the following commands on the NFS server. Storage Considerations During Installation", Collapse section "11. vprobed stopped. Maproot Group - Select nogroup. Stopping ntpd I'm always interested in anything anyone has to say :). Btrfs (Technology Preview)", Collapse section "6. Tom Fenton has a wealth of hands-on IT experience gained over the past 25 years in a variety of technologies, with the past 15 years focusing on virtualization and storage. Let's increase this number to some higher number like 20. Viewing Available iface Configurations, 25.14.2. Configuring the NVMe initiator for Broadcom adapters, 29.2.2. Troubleshooting Online Storage Configuration, 25.22. To enable NFS support on a client system, enter the following command at the terminal prompt: Use the mount command to mount a shared NFS directory from another machine, by typing a command line similar to the following at a terminal prompt: The mount point directory /opt/example must exist. If you use NFS 3 or non-Kerberos NFS 4.1, ensure that each host has root access to the volume. Furthermore, there is a /etc/nfs.conf.d directory which can hold *.conf snippets that can override settings from previous snippets or from the nfs.conf main config file itself. Solid-State Disk Deployment Guidelines, 22.2. Supported SMB Protocol Versions", Collapse section "9.2.1. watchdog-vobd: Terminating watchdog with PID 5278 Extending Swap on an LVM2 Logical Volume, 15.1.2. Figure 4. I went back on the machine that needed access and re-ran the command "sudo mount -a"; Asking for help, clarification, or responding to other answers. Data Deduplication and Compression with VDO, 30.2.3. These are /etc/default/nfs-common and /etc/default/nfs/kernel-server, and are used basically to adjust the command-line options given to each daemon. Once the installation is complete, start the nfs-server service, enable it to automatically start at system boot, and then verify its status using the systemctl commands. NFS Security with AUTH_GSS", Expand section "8.10. A Red Hat training course is available for Red Hat Enterprise Linux, For servers that support NFSv2 or NFSv3 connections, the, To configure an NFSv4-only server, which does not require, On Red Hat Enterprise Linux7.0, if your NFS server exports NFSv3 and is enabled to start at boot, you need to manually start and enable the. He's on Twitter @vDoppler. Make note of the Volume Name, Share Name and Host as we will need this information for the next couple of commands. Because of RESTART?). Required fields are marked *. I hope this helps someone else out there. At a terminal prompt enter the following command to install the NFS Server: To start the NFS server, you can run the following command at a terminal prompt: You can configure the directories to be exported by adding them to the /etc/exports file. On the vPower NFS server, Veeam Backup & Replication creates a special directory the vPower NFS datastore. An alternative is to use rpc.gssds -n option. Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Restricting NFS share access to particular IPs or hosts and restricting others on suse, A question about krb5p and sys on nfs shares. Creating a Single Snapper Snapshot, 14.2.3. However after a while we found that the rpc NFS service was unavailable on BOTH qnaps. Configuring the NFS Server", Expand section "8.6.2. In such cases, please file a bug using this link: https://bugs.launchpad.net/ubuntu/+source/nfs-utils/+filebug. If it does then it may not let the same machine mount it twice. Device Names Managed by the udev Mechanism in /dev/disk/by-*, 25.8.3.1. Using Compression", Collapse section "30.4.8. watchdog-net-lbt: Terminating watchdog with PID 5195 Linear regulator thermal information missing in datasheet. If you use vSphere Client and vCenter to manage an ESXi host, vCenter passes commands to the ESXi host through the vpxa process running on the ESXi host. storageRM module stopped. Configuring Persistent Memory for Use as a Block Device (Legacy Mode), 28.3. Running TSM-SSH stop In my case my NFS server wouldn't present the NFS share until it was able to contact a DNS server, I just picked a random internet one and the moment I did this the ESXi box was able to mount the NFS datastores. The ability to serve files using Ubuntu will allow me to replace my Windows Server for my project. I edited /etc/resolv.conf on my Solaris host and added an internet DNS server and immediately the NFS share showed up on the ESXi box. System Storage Manager (SSM)", Collapse section "16.1.1. Listing Currently Mounted File Systems, 19.2.5. Setting up a Remote Diskless System", Collapse section "24. Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Security Note. Backing Up and Restoring XFS File Systems", Expand section "3.8. Then, install the NFS kernel server on the machine you chose with the following command: sudo apt install nfs-kernel-server. The guidelines include the following items. Network File System (NFS)", Expand section "8.1. Help improve this document in the forum. sleep 20 && service nfs-kernel-server restart. NFS NFS "restart""systemctl" sudo systemctl restart nfs. Set Up NFS Shares. To verify which system was using the NFS share, as well as which ports NFS was using, I entered netstat | grep nfs and rpcinfo -p | grep nfs (Figure 8). Browse other questions tagged. There is no need for users to have separate home directories on every network machine. Overview of NVMe over fabric devices", Collapse section "29. Checking pNFS SCSI Operations from the Client Using mountstats, 9.2.3. Minimising the environmental effects of my dyson brain. storageRM module started. needed to get remote access to a folder on another server; include "remote_server_ip:/remote_name_folder" in /etc/fstab file; after that, to mount and connect to the remote server, I ran the command "sudo mount -a"; at that moment the error message appeared "mount.nfs4: access denied by server while mounting remote_server_ip:/remote_name_folder"; I joined the remote server and configured the ip of the machine that needed access in the /etc/exports file; I exported the accesses using the command ". Overview of NVMe over fabric devices", Expand section "29.1. Restoring an XFS File System from Backup, 3.8.1. The ESXi host and VMs on that host are displayed as disconnected for a moment while ESXi management agents are being restarted on the ESXi host. . When given the proper options, the /usr/sbin/exportfs command writes the exported file systems to /var/lib/nfs/xtab. Removing VDO Volumes", Collapse section "30.4.3. Examples of VDO System Requirements by Physical Volume Size, 30.4.3.1. Styling contours by colour and by line thickness in QGIS. Phase 4: Application Environments, A. How to handle a hobby that makes income in US, Identify those arcade games from a 1983 Brazilian music video, The difference between the phonemes /p/ and /b/ in Japanese. To start an NFS server, we use the following command: # systemctl start nfs. esxcli storage nfs list Make a note of the NFS datastore from step 1. There is an issue with the network connectivity, permissions or firewall for the NFS Server. Even though sync is the default, its worth setting since exportfs will issue a warning if its left unspecified. Rescanning all adapters.. But I did not touch the NFS server at all. If you dont know whether NSX is installed on an ESXi host, you can use this command to find out: If shared graphics is used in a VMware View environment (VGPU, vSGA, vDGA), dont use. Overriding or Augmenting Site Configuration Files, 8.3.4. Verify that the ESXi host can vmkping the NFS server. Overview of Filesystem Hierarchy Standard (FHS)", Collapse section "2.1. Click Add Networking, and then select VMkernel and Create a vSphere standard switch to create the VMkernel port and . Adding New Devices to a btrfs File System, 6.4.6. Resolutions. Instead restart independent . I changed nothing. If the name of the NFS storage contains spaces, it has to be enclosed in quotes. $ sudo apt-get update. ESXi originally only supported NFS v3, but it recently also gained support for NFS v4.1 with the release of vSphere. I don't have a problem paying for software -- in fact, I see great value in Windows Server -- but for this project I only needed NFS services, and the cost of purchasing and using Windows Server just for an NFS server didn't make sense. With NFS enabled, exporting an NFS share is just as easy. A NAS device is a specialized storage device connected to a network, providing data access services to ESXi hosts through protocols such as NFS. All that's required is to issue the appropriate command after editing the /etc/exports file: $ exportfs -ra Excerpt from the official Red Hat documentation titled: 21.7. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Like with sync, exportfs will warn if its left unspecified. I right-clicked my cluster, and then selected Storage | New Datastore, which brought up a wizard. System Storage Manager (SSM)", Collapse section "16. Adjust these names according to your setup. On the vCenter Server Management Interface home page, click Services. By default, starting nfs-server.service will listen for connections on all network interfaces, regardless of /etc/exports. Running ntpd stop To restart the server, as root type: /sbin/service nfs restart: The condrestart (conditional restart) option only starts nfs if it is currently running. NFS (Network File System) is a file-sharing protocol used by ESXi hosts to communicate with a NAS (Network Attached Storage) device over a standard TCP/IP network. [2] Login to VMware Host Client with root user account and click [Storage] icon that is under [Navigator] menu. Configuring Error Behavior", Expand section "3.10. Configuring Error Behavior", Collapse section "3.8. The NFS server does not support NFS version 3 over TCP So, I used SSH, logged into NAS and restarted nfs services using the command: .