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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
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‎exercises/boot_from_volume.sh‎

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

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