provision.sh

#!/bin/bash
#
# This script is used to confiure our Linux instance.
# It is built to be idempotent, which means it can be run as many times as is needed.
#

# Errors are fatal
set -e

UPDATE_FILE=/var/run/apt-update-last-run


echo "# Making sure apt is up to date..."

#
# Check to see if apt update was run within the last day.
#
FOUND=$(find /var/run/apt-update-last-run -mtime -1 || true)

if test "${FOUND}"
then
	echo "# Oh, apt update was run within the last day, skipping!"

else
	apt update
	touch $UPDATE_FILE

fi


echo "# Installing ZFS..."

FOUND=$(dpkg -l | grep zfsutils || true)

if test ! "${FOUND}"
then
	apt install -y zfsutils-linux

else
	echo "# Oh, ZFS is already installed!  Let's move on..."

fi

echo "# Updating \$PATH for vagrant user..."
FOUND=$( grep "/vagrant/bin" /home/vagrant/.bashrc || true)

if test "${FOUND}"
then
	echo "# Oh, \$PATH is already updated..."

else
	echo "" >> /home/vagrant/.bashrc
	echo 'PATH=$PATH:/vagrant/bin' >> /home/vagrant/.bashrc

fi


echo "# Disabling dynamic MOTD if not done already..."
FOUND=$(grep "^session.*motd=/run/motd.dynamic" /etc/pam.d/login || true)
if test "${FOUND}"
then
	echo "# Disabling dynamic MOTD from /etc/pam.d/login..."
	sed -i '/^session.*motd=\/run\/motd.dynamic/s/^/### /' /etc/pam.d/login
fi

FOUND=$(grep "^session.*motd=/run/motd.dynamic" /etc/pam.d/sshd || true)
if test "${FOUND}"
then
	echo "# Disabling dynamic MOTD from /etc/pam.d/sshd..."
	sed -i '/^session.*motd=\/run\/motd.dynamic/s/^/### /' /etc/pam.d/sshd
fi

cp /vagrant/motd /etc/motd

if test ! -d /disks
then
	echo "Making /disks to hold fake disks."
	mkdir /disks
fi


#
# Create a number of virtual disks.
# Since devices are files in UNIX systems, this works GREAT for testing purposes!
#
NUM_DISKS=10
SIZE_MB=1024

for I in $(seq 0 $(( ${NUM_DISKS} - 1 )) )
do
	FILE="disk${I}"
	/vagrant/bin/zfs-add-disk-file ${FILE} 1024
done

echo "# Done!"