From 440be4b6a85f6e25de834d4f5b2736fd82785b17 Mon Sep 17 00:00:00 2001
From: Anthony Young <sleepsonthefloor@gmail.com>
Date: Fri, 10 Feb 2012 21:42:39 -0800
Subject: [PATCH] Add exercise that boots an instance from a volume.

 * Launches a cirros builder instance
 * Mounts a disk to the builder instance
 * Creates a bootable volume from builder
 * Launches the volume-backed instance
 * Update glance syntax
 * Don't require instance-to-web communication (that only works with
   fully configured floating ips)
 * Add footer/header

Change-Id: Ia6dcf399ee49154aaf4e597b060164c2f41cf3d2
---
 exercises/boot_from_volume.sh | 253 ++++++++++++++++++++++++++++++++++
 1 file changed, 253 insertions(+)
 create mode 100755 exercises/boot_from_volume.sh

diff --git a/exercises/boot_from_volume.sh b/exercises/boot_from_volume.sh
new file mode 100755
index 0000000000..8d39703a58
--- /dev/null
+++ b/exercises/boot_from_volume.sh
@@ -0,0 +1,253 @@
+#!/usr/bin/env bash
+
+# **boot_from_volume.sh**
+
+# This script demonstrates how to boot from a volume.  It does the following:
+#  *  Create a 'builder' instance
+#  *  Attach a volume to the instance
+#  *  Format and install an os onto the volume
+#  *  Detach volume from builder, and then boot volume-backed instance
+
+echo "**************************************************"
+echo "Begin DevStack Exercise: $0"
+echo "**************************************************"
+
+# This script exits on an error so that errors don't compound and you see
+# only the first error that occured.
+set -o errexit
+
+# Print the commands being run so that we can see the command that triggers
+# an error.  It is also useful for following allowing as the install occurs.
+set -o xtrace
+
+
+# Settings
+# ========
+
+# Keep track of the current directory
+EXERCISE_DIR=$(cd $(dirname "$0") && pwd)
+TOP_DIR=$(cd $EXERCISE_DIR/..; pwd)
+
+# Import common functions
+source $TOP_DIR/functions
+
+# Import configuration
+source $TOP_DIR/openrc
+
+# Import exercise configuration
+source $TOP_DIR/exerciserc
+
+# Boot this image, use first AMI image if unset
+DEFAULT_IMAGE_NAME=${DEFAULT_IMAGE_NAME:-ami}
+
+# Instance type
+DEFAULT_INSTANCE_TYPE=${DEFAULT_INSTANCE_TYPE:-m1.tiny}
+
+# Default floating IP pool name
+DEFAULT_FLOATING_POOL=${DEFAULT_FLOATING_POOL:-nova}
+
+# Grab the id of the image to launch
+IMAGE=`glance -f index | egrep $DEFAULT_IMAGE_NAME | head -1 | cut -d" " -f1`
+
+die_if_not_set IMAGE "Failure getting image"
+
+# Instance and volume names
+INSTANCE_NAME=${INSTANCE_NAME:-test_instance}
+VOL_INSTANCE_NAME=${VOL_INSTANCE_NAME:-test_vol_instance}
+VOL_NAME=${VOL_NAME:-test_volume}
+
+# Clean-up from previous runs
+nova delete $VOL_INSTANCE_NAME || true
+nova delete $INSTANCE_NAME || true
+
+# Wait till server is gone
+if ! timeout $ACTIVE_TIMEOUT sh -c "while nova show $INSTANCE_NAME; do sleep 1; done"; then
+    echo "server didn't terminate!"
+    exit 1
+fi
+
+# Configure Security Groups
+SECGROUP=${SECGROUP:-test_secgroup}
+nova secgroup-delete $SECGROUP || true
+nova secgroup-create $SECGROUP "$SECGROUP description"
+nova secgroup-add-rule $SECGROUP icmp -1 -1 0.0.0.0/0
+nova secgroup-add-rule $SECGROUP tcp 22 22 0.0.0.0/0
+
+# Determinine instance type
+INSTANCE_TYPE=`nova flavor-list | grep $DEFAULT_INSTANCE_TYPE | cut -d"|" -f2`
+if [[ -z "$INSTANCE_TYPE" ]]; then
+    # grab the first flavor in the list to launch if default doesn't exist
+   INSTANCE_TYPE=`nova flavor-list | head -n 4 | tail -n 1 | cut -d"|" -f2`
+fi
+
+# Setup Keypair
+KEY_NAME=test_key
+KEY_FILE=key.pem
+nova keypair-delete $KEY_NAME || true
+nova keypair-add $KEY_NAME > $KEY_FILE
+chmod 600 $KEY_FILE
+
+# Boot our instance
+VM_UUID=`nova boot --flavor $INSTANCE_TYPE --image $IMAGE --security_groups=$SECGROUP --key_name $KEY_NAME $INSTANCE_NAME | grep ' id ' | cut -d"|" -f3 | sed 's/ //g'`
+
+# check that the status is active within ACTIVE_TIMEOUT seconds
+if ! timeout $ACTIVE_TIMEOUT sh -c "while ! nova show $VM_UUID | grep status | grep -q ACTIVE; do sleep 1; done"; then
+    echo "server didn't become active!"
+    exit 1
+fi
+
+# Delete the old volume
+nova volume-delete $VOL_NAME || true
+
+# Free every floating ips - setting FREE_ALL_FLOATING_IPS=True in localrc will make life easier for testers
+if [ "$FREE_ALL_FLOATING_IPS" = "True" ]; then
+    nova floating-ip-list | grep nova | cut -d "|" -f2 | tr -d " " | xargs -n1 nova floating-ip-delete || true
+fi
+
+# Allocate floating ip
+FLOATING_IP=`nova floating-ip-create | grep $DEFAULT_FLOATING_POOL | cut -d '|' -f2 | tr -d ' '`
+
+# Make sure the ip gets allocated
+if ! timeout $ASSOCIATE_TIMEOUT sh -c "while ! nova floating-ip-list | grep -q $FLOATING_IP; do sleep 1; done"; then
+    echo "Floating IP not allocated"
+    exit 1
+fi
+
+# Add floating ip to our server
+nova add-floating-ip $VM_UUID $FLOATING_IP
+
+# Test we can ping our floating ip within ASSOCIATE_TIMEOUT seconds
+if ! timeout $ASSOCIATE_TIMEOUT sh -c "while ! ping -c1 -w1 $FLOATING_IP; do sleep 1; done"; then
+    echo "Couldn't ping server with floating ip"
+    exit 1
+fi
+
+# Create our volume
+nova volume-create --display_name=$VOL_NAME 1
+
+# Wait for volume to activate
+if ! timeout $ACTIVE_TIMEOUT sh -c "while ! nova volume-list | grep $VOL_NAME | grep available; do sleep 1; done"; then
+    echo "Volume $VOL_NAME not created"
+    exit 1
+fi
+
+# FIXME (anthony) - python-novaclient should accept a volume_name for the attachment param?
+DEVICE=/dev/vdb
+VOLUME_ID=`nova volume-list | grep $VOL_NAME  | cut -d '|' -f 2 | tr -d ' '`
+nova volume-attach $INSTANCE_NAME $VOLUME_ID $DEVICE
+
+# Wait till volume is attached
+if ! timeout $ACTIVE_TIMEOUT sh -c "while ! nova volume-list | grep $VOL_NAME | grep in-use; do sleep 1; done"; then
+    echo "Volume $VOL_NAME not created"
+    exit 1
+fi
+
+# The following script builds our bootable volume.
+# To do this, ssh to the builder instance, mount volume, and build a volume-backed image.
+STAGING_DIR=/tmp/stage
+CIRROS_DIR=/tmp/cirros
+ssh -o StrictHostKeyChecking=no -i $KEY_FILE cirros@$FLOATING_IP << EOF
+set -o errexit
+set -o xtrace
+sudo mkdir -p $STAGING_DIR
+sudo mkfs.ext3 -b 1024 $DEVICE 1048576
+sudo mount $DEVICE $STAGING_DIR
+# The following lines create a writable empty file so that we can scp
+# the actual file
+sudo touch $STAGING_DIR/cirros-0.3.0-x86_64-rootfs.img.gz
+sudo chown cirros $STAGING_DIR/cirros-0.3.0-x86_64-rootfs.img.gz
+EOF
+
+# Download cirros
+if [ ! -e cirros-0.3.0-x86_64-rootfs.img.gz ]; then
+    wget http://images.ansolabs.com/cirros-0.3.0-x86_64-rootfs.img.gz
+fi
+
+# Copy cirros onto the volume
+scp -o StrictHostKeyChecking=no -i $KEY_FILE cirros-0.3.0-x86_64-rootfs.img.gz cirros@$FLOATING_IP:$STAGING_DIR
+
+# Unpack cirros into volume
+ssh -o StrictHostKeyChecking=no -i $KEY_FILE cirros@$FLOATING_IP << EOF
+set -o errexit
+set -o xtrace
+cd $STAGING_DIR
+sudo mkdir -p $CIRROS_DIR
+sudo gunzip cirros-0.3.0-x86_64-rootfs.img.gz
+sudo mount cirros-0.3.0-x86_64-rootfs.img $CIRROS_DIR
+
+# Copy cirros into our volume
+sudo cp -pr $CIRROS_DIR/* $STAGING_DIR/
+
+cd
+sync
+sudo umount $CIRROS_DIR
+# The following typically fails.  Don't know why.
+sudo umount $STAGING_DIR || true
+EOF
+
+# Detach the volume from the builder instance
+nova volume-detach $INSTANCE_NAME $VOLUME_ID
+
+# Boot instance from volume!  This is done with the --block_device_mapping param.
+# The format of mapping is:
+# <dev_name>=<id>:<type>:<size(GB)>:<delete_on_terminate>
+# Leaving the middle two fields blank appears to do-the-right-thing
+VOL_VM_UUID=`nova boot --flavor $INSTANCE_TYPE --image $IMAGE --block_device_mapping vda=$VOLUME_ID:::0 --security_groups=$SECGROUP --key_name $KEY_NAME $VOL_INSTANCE_NAME | grep ' id ' | cut -d"|" -f3 | sed 's/ //g'`
+
+# Check that the status is active within ACTIVE_TIMEOUT seconds
+if ! timeout $ACTIVE_TIMEOUT sh -c "while ! nova show $VOL_VM_UUID | grep status | grep -q ACTIVE; do sleep 1; done"; then
+    echo "server didn't become active!"
+    exit 1
+fi
+
+# Add floating ip to our server
+nova remove-floating-ip  $VM_UUID $FLOATING_IP
+
+# Gratuitous sleep, probably hiding a race condition :/
+sleep 1
+
+# Add floating ip to our server
+nova add-floating-ip $VOL_VM_UUID $FLOATING_IP
+
+# Test we can ping our floating ip within ASSOCIATE_TIMEOUT seconds
+if ! timeout $ASSOCIATE_TIMEOUT sh -c "while ! ping -c1 -w1 $FLOATING_IP; do sleep 1; done"; then
+    echo "Couldn't ping volume-backed server with floating ip"
+    exit 1
+fi
+
+# Make sure our volume-backed instance launched
+ssh -o StrictHostKeyChecking=no -i $KEY_FILE cirros@$FLOATING_IP << EOF
+echo "success!"
+EOF
+
+# Delete volume backed instance
+nova delete $VOL_INSTANCE_NAME
+
+# Wait till our volume is no longer in-use
+if ! timeout $ACTIVE_TIMEOUT sh -c "while ! nova volume-list | grep $VOL_NAME | grep available; do sleep 1; done"; then
+    echo "Volume $VOL_NAME not created"
+    exit 1
+fi
+
+# Delete the volume
+nova volume-delete $VOL_NAME
+
+# Delete instance
+nova delete $INSTANCE_NAME
+
+# Wait for termination
+if ! timeout $ACTIVE_TIMEOUT sh -c "while nova show $INSTANCE_NAME; do sleep 1; done"; then
+    echo "server didn't terminate!"
+    exit 1
+fi
+
+# De-allocate the floating ip
+nova floating-ip-delete $FLOATING_IP
+
+# Delete secgroup
+nova secgroup-delete $SECGROUP
+
+set +o xtrace
+echo "**************************************************"
+echo "End DevStack Exercise: $0"
+echo "**************************************************"