linux, nfs,

NFS mounting in /etc/fstab and verification

Jan 23, 2023 · 1 min read · Post a comment

Using the mount command to mount a NFS disk is a good test practice. Sure, but on the next system reboot, the disk will “magically disappear”. That’s why we need to write the mount configuration to the so-called /etc/fstab file. This configuration file is responsible for storing all information regarding disks, disk partitions and their related options. In today’s cloud age, often and mostly used for mounting swap partitions.

Prerequisites

  • NFS disk setup
  • Linux

Solution

Step 1. Install the NFS tools.

apt-get -y install nfs-common

Step 2. In order to mount a NFS disk, we need to prepare a local directory. For instance:

mkdir -p /mnt/data

Step 3. Now, open the /etc/fstab file and insert the following default configuration:

<NFS_IP_ADDRESS>:/data /mnt/data nfs defaults 0 0

Using default options is a good starting point. Optimize as required.

Step 4. Verify.

nfsstat -m

Note: nfsstat -m will list the current NFS default options, also known as (flags). Example output:

/data from <NFS_IP_ADDRESS>:/mnt/data
 Flags: rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=3,sec=sys,mountaddr=<NFS_IP_ADDRESS>,mountvers=3,mountport=2050,mountproto=tcp,local_lock=none,addr=<NFS_IP_ADDRESS>

Additionally, you could run: df -h --type=nfs too. Example output:

Filesystem              Size  Used Avail Use% Mounted on
<NFS_IP_ADDRESS>:/data  100G  8G   92G   8%   /data

Step 5. To be 100% sure, reboot the instance and run the verification steps above again.

Conclusion

Related post: GCP Filestore error: “mount: wrong fs type, bad option, bad superblock”.

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