NFS Storage Guide

NFS_GUIDE.md

Only proven to work on CentOS and Rhel servers.

1. Attach a storage device in the server. In this scenario, it's /dev/sdb. lsblk

   DEVICE_NAME="/dev/sdb"
   NFS_DIR="/nfs-dir"
   FS_TYPE="xfs"
   #FS_TYPE="ext4" #I recommend for AWS EBS

2. Format the storage device. In this scenario, it's xfs. mkfs.$FS_TYPE $DEVICE_NAME .

3. Create the directory to mount and mount the formatted storage device.

   mkdir $NFS_DIR
   mount $DEVICE_NAME $NFS_DIR

4. Add an entry to /etc/fstab to persist the storage device mount configuration.

   • Get the UUID of the storage device .

     blkid | grep $DEVICE_NAME
     /dev/sdb: UUID="e5eac1a0-4ea9-48ff-801a-063c3ef5d041" TYPE="xfs"

   • Modify /etc/fstab .

     echo "UUID=e5eac1a0-4ea9-48ff-801a-063c3ef5d041 $NFS_DIR $FS_TYPE defaults,nofail 1 2" >> /etc/fstab

   • Validate mount config and ensure there are no errors mount -a

5. Prepare the exports configuration file .

   echo "$NFS_DIR *(rw,root_squash)" >> /etc/exports.d/nfs-dir.exports

6. Update nfs exports configuration .

   exports -a
   exports -v

7. Ensure that the new NFS export directory has the right permission

   chown nfsnobody:nfsnobody $NFS_DIR
   chmod 777 $NFS_DIR

8. Ensure that SELinux allows writing to the exported directory .

   setsebool -P virt_use_nfs 1
   setsebool -P virt_sandbox_use_nfs 1

9. Ensure that the NFS server allows server traffic .

   # for NFSv4 and NFSv3
   iptables -I INPUT 1 -p tcp --dport 2049 -j ACCEPT
   # for NFSv3 only
   iptables -I INPUT 1 -p tcp --dport 20048 -j ACCEPT
   iptables -I INPUT 1 -p tcp --dport 111 -j ACCEPT