add swap to fix OOM kill for pip in cheapest AWS instance type m1.tiny

faafo/contrib/install-aws.sh

@@ -146,8 +146,12 @@ if [[ -e /etc/os-release ]]; then
         cd cloud-computing-msc-ai-examples/faafo
         # following line required by bug 1636150
         sudo pip install --upgrade pbr
-        sudo pip install -r requirements.txt
-        # rerun install of reqs in AWS, as first run seams to be killed?
+        # in m1.tiny instance during cloud-init the following pip install can experience OOM kill
+        # setup swap to prevent that
+        sudo dd if=/dev/zero of=/swap bs=1M count=512
+        sudo chmod 600 /swap
+        sudo mkswap /swap
+        sudo swapon /swap
         sudo pip install -r requirements.txt
         sudo python setup.py install