euca.sh

euca.sh

#!/usr/bin/env bash


we will use the euca2ools cli tool that wraps the python boto library to test ec2 compatibility


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 occurred.

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)
VOLUME_SIZE=1
ATTACH_DEVICE=/dev/vdc

Import common functions

source $TOP_DIR/functions

Import EC2 configuration

source $TOP_DIR/eucarc

Import exercise configuration

source $TOP_DIR/exerciserc

If nova api is not enabled we exit with exitcode 55 so that the exercise is skipped

is_service_enabled n-api || exit 55

Skip if the hypervisor is Docker

[[ "$VIRT_DRIVER" == "docker" ]] && exit 55

Instance type to create

DEFAULT_INSTANCE_TYPE=${DEFAULT_INSTANCE_TYPE:-m1.tiny}

Boot this image, use first AMI image if unset

DEFAULT_IMAGE_NAME=${DEFAULT_IMAGE_NAME:-ami}

Security group name

SECGROUP=${SECGROUP:-euca_secgroup}


Launching a server


Find a machine image to boot

IMAGE=`euca-describe-images | grep machine | grep ${DEFAULT_IMAGE_NAME} | cut -f2 | head -n1`
die_if_not_set $LINENO IMAGE "Failure getting image $DEFAULT_IMAGE_NAME"

if is_service_enabled n-cell; then

Cells does not support security groups, so force the use of "default"

    SECGROUP="default"
    echo "Using the default security group because of Cells."
else

Add a secgroup

    if ! euca-describe-groups | grep -q $SECGROUP; then
        euca-add-group -d "$SECGROUP description" $SECGROUP
        if ! timeout $ASSOCIATE_TIMEOUT sh -c "while ! euca-describe-groups | grep -q $SECGROUP; do sleep 1; done"; then
            die $LINENO "Security group not created"
        fi
    fi
fi

Launch it

INSTANCE=`euca-run-instances -g $SECGROUP -t $DEFAULT_INSTANCE_TYPE $IMAGE | grep INSTANCE | cut -f2`
die_if_not_set $LINENO INSTANCE "Failure launching instance"

Assure it has booted within a reasonable time

if ! timeout $RUNNING_TIMEOUT sh -c "while ! euca-describe-instances $INSTANCE | grep -q running; do sleep 1; done"; then
    die $LINENO "server didn't become active within $RUNNING_TIMEOUT seconds"
fi

Volumes

if is_service_enabled c-vol && ! is_service_enabled n-cell; then
    VOLUME_ZONE=`euca-describe-availability-zones | head -n1 | cut -f2`
    die_if_not_set $LINENO VOLUME_ZONE "Failure to find zone for volume"

    VOLUME=`euca-create-volume -s 1 -z $VOLUME_ZONE | cut -f2`
    die_if_not_set $LINENO VOLUME "Failure to create volume"

Test that volume has been created

    VOLUME=`euca-describe-volumes $VOLUME | cut -f2`
    die_if_not_set $LINENO VOLUME "Failure to get volume"

Test volume has become available

    if ! timeout $RUNNING_TIMEOUT sh -c "while ! euca-describe-volumes $VOLUME | grep -q available; do sleep 1; done"; then
        die $LINENO "volume didn't become available within $RUNNING_TIMEOUT seconds"
    fi

Attach volume to an instance

    euca-attach-volume -i $INSTANCE -d $ATTACH_DEVICE $VOLUME || \
        die $LINENO "Failure attaching volume $VOLUME to $INSTANCE"
    if ! timeout $ACTIVE_TIMEOUT sh -c "while ! euca-describe-volumes $VOLUME | grep -A 1 in-use | grep -q attach; do sleep 1; done"; then
        die $LINENO "Could not attach $VOLUME to $INSTANCE"
    fi

Detach volume from an instance

    euca-detach-volume $VOLUME || \
        die $LINENO "Failure detaching volume $VOLUME to $INSTANCE"
    if ! timeout $ACTIVE_TIMEOUT sh -c "while ! euca-describe-volumes $VOLUME | grep -q available; do sleep 1; done"; then
        die $LINENO "Could not detach $VOLUME to $INSTANCE"
    fi

Remove volume

    euca-delete-volume $VOLUME || \
        die $LINENO "Failure to delete volume"
    if ! timeout $ACTIVE_TIMEOUT sh -c "while euca-describe-volumes | grep $VOLUME; do sleep 1; done"; then
        die $LINENO "Could not delete $VOLUME"
    fi
else
    echo "Volume Tests Skipped"
fi

if is_service_enabled n-cell; then
    echo "Floating IP Tests Skipped because of Cells."
else

Allocate floating address

    FLOATING_IP=`euca-allocate-address | cut -f2`
    die_if_not_set $LINENO FLOATING_IP "Failure allocating floating IP"

describe all instances at this moment

    euca-describe-instances

Associate floating address

    euca-associate-address -i $INSTANCE $FLOATING_IP || \
        die $LINENO "Failure associating address $FLOATING_IP to $INSTANCE"

Authorize pinging

    euca-authorize -P icmp -s 0.0.0.0/0 -t -1:-1 $SECGROUP || \
        die $LINENO "Failure authorizing rule in $SECGROUP"

Test we can ping our floating ip within ASSOCIATE_TIMEOUT seconds

    ping_check "$PUBLIC_NETWORK_NAME" $FLOATING_IP $ASSOCIATE_TIMEOUT

Revoke pinging

    euca-revoke -P icmp -s 0.0.0.0/0 -t -1:-1 $SECGROUP || \
        die $LINENO "Failure revoking rule in $SECGROUP"

Release floating address

    euca-disassociate-address $FLOATING_IP || \
        die $LINENO "Failure disassociating address $FLOATING_IP"

Wait just a tick for everything above to complete so release doesn't fail

    if ! timeout $ASSOCIATE_TIMEOUT sh -c "while euca-describe-addresses | grep $INSTANCE | grep -q $FLOATING_IP; do sleep 1; done"; then
        die $LINENO "Floating ip $FLOATING_IP not disassociated within $ASSOCIATE_TIMEOUT seconds"
    fi

Release floating address

    euca-release-address $FLOATING_IP || \
        die $LINENO "Failure releasing address $FLOATING_IP"

Wait just a tick for everything above to complete so terminate doesn't fail

    if ! timeout $ASSOCIATE_TIMEOUT sh -c "while euca-describe-addresses | grep -q $FLOATING_IP; do sleep 1; done"; then
        die $LINENO "Floating ip $FLOATING_IP not released within $ASSOCIATE_TIMEOUT seconds"
    fi
fi

Terminate instance

euca-terminate-instances $INSTANCE || \
    die $LINENO "Failure terminating instance $INSTANCE"

Assure it has terminated within a reasonable time. The behaviour of this case changed with bug/836978. Requesting the status of an invalid instance will now return an error message including the instance id, so we need to filter that out.

if ! timeout $TERMINATE_TIMEOUT sh -c "while euca-describe-instances $INSTANCE | grep -ve '\(InstanceNotFound\|InvalidInstanceID\.NotFound\)' | grep -q $INSTANCE; do sleep 1; done"; then
    die $LINENO "server didn't terminate within $TERMINATE_TIMEOUT seconds"
fi

if [[ "$SECGROUP" = "default" ]] ; then
    echo "Skipping deleting default security group"
else

Delete secgroup

    euca-delete-group $SECGROUP || die $LINENO "Failure deleting security group $SECGROUP"
fi

set +o xtrace
echo "*********************************************************************"
echo "SUCCESS: End DevStack Exercise: $0"
echo "*********************************************************************"