Add swap space configuration to EBS instance

.ebextensions/01_setup_swap.config

@@ -0,0 +1,3 @@
+container_commands:
+    01setup_swap:
+        command: "bash .ebextensions/setupSwap.sh"

.ebextensions/setupSwap.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+SWAPFILE=/var/swapfile
+SWAP_MEGABYTES=2048
+
+if [ -f $SWAPFILE ]; then
+    echo "Swapfile $SWAPFILE found, already configured"
+    exit;
+fi
+
+dd if=/dev/zero of=$SWAPFILE bs=1M count=$SWAP_MEGABYTES
+chmod 600 $SWAPFILE
+mkswap $SWAPFILE
+swapon $SWAPFILE