docs

exercises/euca.sh

@@ -1,12 +1,9 @@
 #!/usr/bin/env bash
 
-# **exercise.sh** - using the cloud can be fun
-
-# we will use the ``nova`` cli tool provided by the ``python-novaclient``
-# package
+# we will use the ``euca2ools`` cli tool that wraps the python boto 
+# library to test ec2 compatibility
 #
 
-
 # This script exits on an error so that errors don't compound and you see
 # only the first error that occured.
 set -o errexit
@@ -25,10 +22,13 @@ source ./openrc
 # Max time till the vm is bootable
 BOOT_TIMEOUT=${BOOT_TIMEOUT:-15}
 
+# find a machine image to boot
 IMAGE=`euca-describe-images | grep machine | cut -f2`
 
+# launch it
 INSTANCE=`euca-run-instance $IMAGE | grep INSTANCE | cut -f2`
 
+# assure it has booted within a reasonable time
 if ! timeout $BOOT_TIMEOUT sh -c "while euca-describe-instances $INSTANCE | grep -q running; do sleep 1; done"; then
     echo "server didn't become active within $BOOT_TIMEOUT seconds"
     exit 1