Raspberry Pi 3b+ NFS Server

Mount drives on Raspberry Pi

We are starting with an unformatted and unpartitioned SSD connected to the RPi USB port.

Update your rig
```
sudo apt update && sudo apt upgrade -y
```
Raberry Pi online docs recommend installing exfat-fuse but, you wont need it if you are formatting fresh drives.
```
sudo apt-get install exfat-fuse
```
find the device NAME
```
sudo lsblk -o UUID,NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL,MODEL
```
If it is the only hard drive connected it should be 'sda'. This means the device is located at /dev/sda. You can go check if you want.
It's easy to export this so we don't need to remember it.
```
export DRIVE=/dev/sda
```
Lets Partition the drive
```
sudo fdisk $DRIVE
```
You are now in the fdisk control space.
- d will delete any prior partitions.
- n creates new partitions (Defaults will produce a single partition spanning the entire drive).
- w writes the changes and exits.
- p displays the current partitions.
- m for help/manual.
Time to give that new partition a filesystem. 1 is added due to being the first partition on the drive.
```
sudo mkfs -t vfat -I $DRIVE"1"
```

Create a mount point for the drive, generally in media or mnt.

export MOUNT="/mnt/SSD" && \
sudo mkdir -p $MOUNT && \
sudo chmod 777 $MOUNT

Mount it. Note we mount partition1.

sudo mount $DRIVE"1" $MOUNT -o umask=000

Mount drive on reboot. Be gentle with fstab

Create an entry for the drive in /etc/fstab

export UUID=$(sudo blkid $DRIVE | awk '{print substr($2,7,9)}') && \
sudo echo "UUID=$UUID $MOUNT vfat defaults,auto,umask=000,users,rw   0      0" | sudo tee -a /etc/fstab

Restart after this step to verify that the fstab setting is correct.

sudo reboot

If your RPi does not boot, don't worry you just need to correct it using the section below.

EXT4 Support for Mac OSX

If something goes wrong when editing the fstab file in the previous step, your RPi will not boot. We gotta correct this as easy as possible. You could wipe the entire card and reload the raspian image, but lets just comment out the bad fstab line instead.

Virtual Box Ubuntu VM
USB 3.0 Expansion Pack for Virtual Box

On Mac Machine:

Unmount MMC card from Mac machine
Fire up ubuntu inside virtual box
Go to Devices>USB to enable your MMC card in Ubuntu
rootfs drive partition is what we want
find your jacked fstab file and sudo edit it.
Comment out the botched fstab entry

https://inderpreetsingh.com/2014/11/02/ext4-repair-on-mac-osx/

NFS Server on Raspberry Pi

Now, the drive is partitioned, imaged, and set to mount on start. It is time to install the NFS server and configure it.

Pre-reqs

sudo apt-get install nfs-kernel-server portmap nfs-common

Make NFS folder and give lenient permissions for local network

mkdir -p $MOUNT/nfs && \
sudo chmod -R 777 $MOUNT/nfs
sudo chown nobody:nogroup $MOUNT/nfs

Add shared folder to /etc/exports

sudo echo -e "$MOUNT/nfs"\t"192.168.1.0/24(rw,sync,no_subtree_check,insecure,all_squash)" >> /etc/exports

Reset exports
```
sudo exportfs -a
```

And restart nfs service

sudo systemctl restart nfs-kernel-server

Quick connect NFS Client

install nfs utils
```
sudo apt install nfs-utils nfs-common
```

Create local mount directory

export LOCAL_MOUNT_DIR=/mnt/nfs1  && \
sudo mkdir -p $LOCAL_MOUNT_DIR

Use the mount.nfs tool

export NFS_IP=nfs1.local && \
export NFS_MOUNT_DIR=/mnt/SSD/nfs && \
sudo mount.nfs $NFS_IP:$NFS_MOUNT_DIR $LOCAL_MOUNT_DIR

Test your NFS server performace

https://serverfault.com/questions/306204/what-are-typical-nfs-read-write-rates

Test NFS Write speed:

time dd if=/dev/zero of=$LOCAL_MOUNT_DIR/testfile bs=16k count=128k

Test NFS Read speed:

time dd if=$LOCAL_MOUNT_DIR/testfile of=/dev/null bs=16k

Edit fstab to enable the NFS mount at startup

sudo echo "$NFS_IP:$NFS_MOUNT_DIR $LOCAL_MOUNT_DIR nfs4 _netdev,auto   0      0" | sudo tee -a /etc/fstab

Ansible NFS deployment

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