Trying to create the kaazing jms clustering on localhost with two cluster member,
Reference URL : https://developer.kaazing.com/documentation/jms/3.1/howto-admin-ha.html#ha_cluster
You can create separate cluster configuration files in same kaazing instance, that means no need to install new instance. For configuration see below link
http://developer.kaazing.com/documentation/jms/4.0/high-availability/u_ha.html#demo