Added m3.2xlarge EC2 instance type to swapfile setup

ec2/swap.sh

@@ -1,5 +1,23 @@
 #!/bin/bash -e
 
+function setup_swap() {
+    device=$1
+    size=$2
+
+    # fallocate works with ext4
+    umount /mnt
+    mkfs.ext4 $device
+    mount $device /mnt
+
+    # quickly allocate a large swapfile
+    fallocate -l $size /mnt/swapfile
+    chown root:root /mnt/swapfile
+    chmod 600 /mnt/swapfile
+
+    mkswap /mnt/swapfile
+    swapon /mnt/swapfile
+}
+
 IFS=$'\n'
 for line in `cat /proc/mounts`; do
     mount=`echo $line | cut -d' ' -f 2`
@@ -8,17 +26,13 @@ for line in `cat /proc/mounts`; do
     fi
 done
 
-instance_type=`curl -s http://169.254.169.254/latest/meta-data/instance-type`
+if [ -n $device ]; then
+    instance_type=`curl -s http://169.254.169.254/latest/meta-data/instance-type`
 
-if [ -n $device -a $instance_type = 'm3.xlarge' ]; then
-    umount /mnt
-    mkfs.ext4 $device
-    mount $device /mnt
+    if [ $instance_type = 'm3.xlarge' ]; then
+        setup_swap $device 36G
 
-    fallocate -l 36G /mnt/swapfile
-    chown root:root /mnt/swapfile
-    chmod 600 /mnt/swapfile
-
-    mkswap /mnt/swapfile
-    swapon /mnt/swapfile
+    elif [ $instance_type = 'm3.2xlarge' ]; then
+        setup_swap $device 72G
+    fi
 fi