Upgrade Openstack deployed with Juju Charm

charm-upgrade-openstack

#!/bin/bash -eu
#
# Trigger a managed upgrade.
#
# Authors:
#    edward.hope-morley@canonical.com
#
SERVICE=$1
RELEASE=$2
SERIES=${3:-'trusty'}
units ()
{
cat << EOF| python -
import json, subprocess
data = subprocess.check_output(['juju', 'status', '--format=json'])
j = json.loads(data)
services = j['services']
print '\n'.join(services["$1"]['units'].keys())
EOF
}
juju set $SERVICE action-managed-upgrade=True openstack-origin="cloud:$SERIES-$RELEASE"
for unit in `units $SERVICE`; do
    echo -e "\033[32mUpgrading unit \033[33m$unit\033[32m to \033[33mcloud:$SERIES-$RELEASE\033[0m"
    juju action do $unit openstack-upgrade
done