005-minimal-ram

#!/bin/bash
# Various fixes for very small VMs
# Mainly this is just Swap file hacks so NPM doesn't kill itself when searching in <512mb RAM

source common

INIT status "Minimal Server Setup"
ISMINIMAL=`INIT ask --prompt "Is this server a tiny VM server with RAM < 512mb? (y|n)" --default "y"`

if [ "$ISMINIMAL" != "y" ]; then
	exit 0
fi

# Size in GB of the swap file to set up. Must be a whole number
# Webpack faults if total RAM size is less than 4gb so 4 is a good number here
SIZEGB=4

INIT status "Setting up ${SIZEGB}gb Swap file"
sudo touch /var/swap-${SIZEGB}gb.img
sudo chmod 0600 /var/swap-${SIZEGB}gb.img
sudo dd if=/dev/zero of=/var/swap-${SIZEGB}gb.img bs=1024k count=${SIZEGB}000
sudo mkswap /var/swap-${SIZEGB}gb.img
sudo swapon /var/swap-${SIZEGB}gb.img
echo "/var/swap-${SIZEGB}gb.img    none    swap    sw    0    0" | sudo tee -a /etc/fstab >/dev/null


INIT status "Setting up system Swappiness"
sudo sysctl -w vm.swappiness=30