Mounting windows nfs share on linux
This blog post will be about mounting Windows shares on Linux Operating Systems.
Actually, I have used this method explained in this post, recently for mounting a Windows Share to a virtualized ODA machine (mounting directly to the Linux ODA Base nodes).
Those who follow me know that I m trying to share unique articles and try to give you the info that can’t be easily found on the internet or Oracle Support.
This is also true for this article, although its name sounds quite familiar. I mean, Windows Admins may use it frequently but when it comes to Linux, we are more concantrate on the success of mouting the Windows shares, rather the method that we are using to mount them.
Actually, the main reason that made me writing this post is the hang situation that we have faced when using Windows shares.. (I m talking mounting Windows shares using CIFS , as we have faced sudden and unexpected hang situations using it.)
Another reason is, for mounting the Windows shares on Linux environments, we are using CIFS mostly, so that’s why I m writing this post to give you another method for mounting Windows Shares on Linux.
Before going forward, I want to give you the quick definitions of CIFS and NFS.
CIFS (Common Internet File System) is a form of SMB, developed by Microsoft.
Note that: Samba is an implementation of SMB written for UNIX. So Samba allows Unix clients to access CIFS shares. Samba and Smb are two different thing in this manner.
CIFS is used by Windows operating systems for file sharing.
It is based on a Client Server model and it is using TCP/IP.
With CIFS, servers share the storage and clients use or map the storage share.
The most common SMB/CIFS server for Linux is Samba.
NFS is the «Network File System» . NFS was originally developed by Sun and it is often used with Unix operating systems.
NFS has various versions like Nfsv2, v3 and v4. All these versions can use TCP/IP.
Note that, v2 and v3 can use UDP as well.(less protocol overhead than TCP)
With NFS, servers export the storage and clients mount the storage.
The most common Linux NFS server is «nfsd».
Windows Shares supports both CIFS and NFS.
Wel. After this quick info, let’s take a look at what we need to do for sharing our Windows directories using NFS and mounting them on Linux Operating systems.
Fist, we install services for NFS components in our Windows Server.
Click Start, point to Administrative Tools, and then click Server Manager.
In the left pane, click Manage Roles.
Click Add Roles. The Add Roles Wizard appears.
Click Next. The Select Server Roles options appear.
Select the File Server check box and click Next.
The File Server screen appears. Click Next to view the Role Services options.
Select the Services for Network File System (NFS) check box and click Next.
Confirm your selection and click Install.
When the installation completes, the installation results will appear. Click Close.
After we install the services, we share our folder as NFS Service.
Note that, if we just mount the folder (without completing the NFS enablement of our share), we get the error represented in example below:
We open the Share and Storage Management and click on the Provision Share;
Windows Server 2016 as an NFS server for Linux clients
In this post I will explain how you can configure an NFS Server on a Windows 2016 Server and connect/mount the NFS exports on Linux clients, in my case I wanted to run a Linux virtual machine whist ensuring that the actual data resides on physical disks on my host machine ensuring that the data is automatically part of my nightly backup routine and did not need to run separate backup scripts on the VM(s).
A bit of background first…
In my home network I have a single (in an attempt to be eco-friendly) Intel i7 server running Windows Server 2016 Standard edition, I use this server for hosting my family media, files and various database engines and ActiveDirectory for local development (I’m a software engineer by trade!) in addition to several Hyper-V virtual machines that do various tasks, all of the virtual machines are running a derivative of Linux.
I currently have the following virtual machines setup and running on it (under Hyper-V):
- A Web Server and reverse proxy running Ubuntu Server 16.04 LTS – Hosting Gogs, Minio and various Nginx reverse proxy configurations for sites, services and API’s that sit on other VM’s in my network.
- An OpenVPN server running CentOS 7 – Providing secure VPN tunnel access for me when away from home.
- A Jenkins server running Ubuntu Server 16.04 LTS– Used for automated code testing and continuous integration.
- A MineCraft server running Ubuntu Server 16.04 LTS – Used by my daughter and friend to play online together.
In the past I used to run VMWare ESXi and hosted everything in their own virtual machine for better isolation and performance although since then, I had tested and was extremely happy with the performance of running virtual machines on top of Hyper-V and Windows Server so when I re-built my home server several months ago I decided to go down that route instead.
Anyway, enough of all that, let me explain why I have such a need for this kind of set-up…
My home server has 1x SDD (500GB for the host operating system and local applications) in addition to 2x WD Red 4TB hard drives in a hardware RAID1 configuration, I periodically backup this array over my LAN to a Buffalo NAS device.
My plan is to install a new VM running Ubuntu Server 16.04 that will host an instance of NextCloud, this will provide me, my family and friends with a free alternative to DropBox with masses of space in addition to all the other cool things that NextCloud offer such as encrypted video calls and the like.
By setting up an NFS server on the host operating system, instead of provisioning this Linux VM with a massive virtual hard disk (and taking drive space away from the host OS) I have instead provisioned it with a single 20GB virtual hard drive and will then use NFS shares on my Windows Server to host the files on the physical disk and thus be automatically part of my backup routine and alleviate the need for using rsync or rsnapshot etc. on the VM and transferring it at regular intervals.
Installing NFS Server on Windows Server 2016
First up, we need to login to our Windows Server and open up the Server Management tool, once open, click on the large text link labelled “Add Roles and Features” as shown here:
Once you have clicked on the “Add Roles and Features” link you should then be presented with this wizard:
Accept the default “Role-based or feature based installation” and then click Next…
On the next screen you’ll be asked to choose the server that you want to add the role or feature to, select your server from the list that appears (you’ll probably only have one in the list anyway!) and then click Next…
You will now be presented with a screen titled “Select server roles“, expand the following sections, then check the “Server for NFS” option as shown in the screenshot below:
Once checked, click on the “Next” button…
The next screen will just ask you to “Select features“, you can simply click “Next“!
Finally, you’ll be shown a screen asking you to confirm the installation items, we now choose “Install“, this screen and the selection of features and roles to add should look as follows:
Great! We now have an NFS server running on our Windows 2016 Server!
Creating an NFS share (export)
Now that we have the NFS server installed we can now go and share (or “export” as NFS likes to call it) a directory, as per my intro notes to this blog post, I plan to add this to my data RAID array.
So first up, lets go and create a new directory on our data disk (in my case this is my D: drive), I’ve decided to call the directory “NFS” and then, inside that folder we’ll create another directory called “VSVR-WEB040_data” – This folder will be explicitly shared with my VM (that is named ‘VSVR-WEB040‘, the “_data” portion I’ve just named as that is what I will mount the share locally on the VM as eg. /data).
Now that you have an NFS server installed you can share/export numerous directories to individual or multiple VM’s or even other physical servers in your network.
The result of setting up this directory structure is as follows:-
Next up, we’ll right-click on the newly created folder and choose “Properties” – This will enable us to “Share” it as well as lock down the access to only a specific IP address (that being my NextCloud VM)…
From the Properties window, select the “NFS Sharing” tab and then click on the button named “Manage NFS Sharing” this should then display the following window:
Ensure that the above screenshot matches your folder (eg. select all the checkboxes as per the above)
Next we’ll configure the permissions for the share, clicking on the “Permissions” button in the above screenshot will then display the following window:
As you can see from the above screenshot, the permissions for this share are very restrictive by default, this is basically saying that for ALL MACHINES trying to access this share they WILL NOT be granted any access.
We should leave the defaults as is as we will instead create another permission only granting our specific VM access, to do this click on the “Add” button, the following screen should then appear:
I’ve entered my virtual server IP address in to the “Add names” field already (172.25.87.40), you’ll then need to change the “Type of access” drop-down box to “Read/Write” and check the “Allow root access” checkbox.
Once completed, click the “OK” button!
That’s great, our Permissions form should now look as follows:-
Perfect! – We’re all done on the NFS server side configuration now!
Mounting the NFS share on the client-side
We can now mount the NFS share on our Ubuntu Server (the virtual machine), first we need to install the NFS tools, so we’ll login to our server (I’m using root but you should really use a user with sudo rights!)…
sudo apt-get install -y nfs-common
So before we configure fstab to automatically mount our NFS share at system boot, we’ll first test using the command line to make sure everything works as expected…
Before we can mount the NFS share we must first create a mount point, we will do this like so:
Now that we have created the mount point, we can mount the remote file-system as follows:
sudo mount -t nfs 172.25.87.20:/VSVR-WEB040_data /data
Once mounted you should be able to run the following commands, these commands will essentially create a file on our server and a text file with some content…
echo "This is a test file" > /data/test.txt
We can now jump back over to our Windows server and check our NFS server directory, we should see a file named test.txt and when we open it in Notepad, the contents should appear as follows:-
All going well, that has hopefully worked a charm for you and we can now move on to ensuring that our VM automatically mounts the NFS share at boot.
If for whatever reason wish to un-mount the share you can do it like so:
Configuring fstab to mount our NFS share on system boot
Using a text editor on the Linux VM we will open up the /etc/fstab file and add the following line to the bottom of the file:
172.25.87.20:/VSVR-WEB040_data /data nfs auto,nofail,noatime,nolock,intr,tcp,actimeo=1800 0 0
You’ll obviously need to replace your server’s IP address with your own 😉
The result should look something like the below:
Once completed, save the file and you can now either attempt to automatically mount the share using this command:
…or you can reboot your server!
Once rebooted, login and you can then check and confirm that you have re-mounted your /data directory to the remote server by checking the output of:
You should be able to see and confirm the remote disk usage as demonstrated here:
OK, well that’s it, I hope this has been useful for you 🙂