AWS_REGION=${aws-region}
AWS_STACK_ID=${cluster-id}
AWS_STACK_NAME=${cluster-name}
AWS_IAM_MASTER_ROLE_NAME=${master-role}
AWS_IAM_SLAVE_ROLE_NAME=${slave-role}
AWS_ACCESS_KEY_ID=${aws-access-key}
AWS_SECRET_ACCESS_KEY=${aws-secret-access-key}
ZOOKEEPER_CLUSTER_SIZE=${number-of-masters}
