Directly create bootable volume based on image ID.
Now that a bootable volume can be created directly based on image ID, we can dispense with the complexity around using a builder instance to acheive the same effect. Change-Id: Ied1f6863a4dd21685e2f135841b9e2c4d499675f
This commit is contained in:
Eoghan Glynn
parent
eccaa80ba8
commit
fc65cfed55
@ -3,10 +3,8 @@
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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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# * Create a bootable volume
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# * Boot a volume-backed instance
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echo "*********************************************************************"
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echo "Begin DevStack Exercise: $0"
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@ -37,6 +35,10 @@ source $TOP_DIR/openrc
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# Import exercise configuration
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source $TOP_DIR/exerciserc
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# If cinder or n-vol are not enabled we exit with exitcode 55 so that
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# the exercise is skipped
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is_service_enabled cinder n-vol || exit 55
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# Boot this image, use first AMI image if unset
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DEFAULT_IMAGE_NAME=${DEFAULT_IMAGE_NAME:-ami}
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@ -61,16 +63,13 @@ IMAGE=`glance image-list | egrep " $DEFAULT_IMAGE_NAME " | get_field 1`
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die_if_not_set IMAGE "Failure getting image"
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# Instance and volume names
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INSTANCE_NAME=${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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if ! timeout $ACTIVE_TIMEOUT sh -c "while nova show $VOL_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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@ -95,16 +94,6 @@ 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 ' | get_field 2`
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die_if_not_set VM_UUID "Failure launching $INSTANCE_NAME"
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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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@ -122,17 +111,8 @@ if ! timeout $ASSOCIATE_TIMEOUT sh -c "while ! nova floating-ip-list | grep -q $
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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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# Create the bootable volume
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nova volume-create --display_name=$VOL_NAME --image-id $IMAGE 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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@ -140,62 +120,7 @@ if ! timeout $ACTIVE_TIMEOUT sh -c "while ! nova volume-list | grep $VOL_NAME |
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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 | get_field 1`
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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 ${DEFAULT_INSTANCE_USER}@$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 ${DEFAULT_INSTANCE_USER}@$FLOATING_IP:$STAGING_DIR
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# Unpack cirros into volume
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ssh -o StrictHostKeyChecking=no -i $KEY_FILE ${DEFAULT_INSTANCE_USER}@$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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@ -210,12 +135,6 @@ if ! timeout $ACTIVE_TIMEOUT sh -c "while ! nova show $VOL_VM_UUID | grep status
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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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@ -226,9 +145,13 @@ if ! timeout $ASSOCIATE_TIMEOUT sh -c "while ! ping -c1 -w1 $FLOATING_IP; do sle
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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 ${DEFAULT_INSTANCE_USER}@$FLOATING_IP << EOF
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echo "success!"
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EOF
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if ! timeout $ACTIVE_TIMEOUT sh -c "while ! ssh -o StrictHostKeyChecking=no -i $KEY_FILE ${DEFAULT_INSTANCE_USER}@$FLOATING_IP echo success ; do sleep 1; done"; then
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echo "server didn't become ssh-able!"
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exit 1
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fi
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# Remove floating ip from volume-backed instance
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nova remove-floating-ip $VOL_VM_UUID $FLOATING_IP
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# Delete volume backed instance
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nova delete $VOL_INSTANCE_NAME || \
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@ -244,16 +167,6 @@ fi
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nova volume-delete $VOL_NAME || \
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die "Failure deleting volume $VOLUME_NAME"
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# Delete instance
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nova delete $INSTANCE_NAME || \
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die "Failure deleting instance $INSTANCE_NAME"
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# Wait for termination
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if ! timeout $TERMINATE_TIMEOUT sh -c "while nova list | grep -q $VM_UUID; do sleep 1; done"; then
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echo "Server $NAME not deleted"
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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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die "Failure deleting floating IP $FLOATING_IP"
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