read_relation.sh

#!/bin/bash -e
# Usage:
#    ./read_relation.sh <RELATION> <UNIT> <UNIT_TO_READ_FROM>
# Example:
#    ./read_relation.sh identity-service cinder/0 keystone/0
#
#    In this example we are reading the data contained in the identity-service
#    relation between cinder/0 and keystone/0.

INTERFACE="$1"
UNIT1=$2
UNIT2=$3

set -x
RELATION_ID=$(juju run --unit $UNIT1 "relation-ids $INTERFACE")

juju run --unit $UNIT1 "relation-get -r $RELATION_ID - $UNIT2"