On the Petals ESB Registry cluster

The Petals ESB Registry is in charge of storing all service endpoints deployed on several Petals ESB. For a high availability purpose, this registry is a cluster that we must defined.

The Petals ESB Registry cluster can be configured through a cluster definition (ie. cluster.xml).

This document will explain to you how to properly configure the cluster of your Petals ESB Registry.

Table of contents

On the Petals ESB Registry cluster
Cluster composition
Configuring the cluster

Cluster credentials
Member list
Hazelcast Management Center

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Cluster composition

The Petals ESB Registry cluster is mainly an Hazelcast full TCP/IP cluster. It does not support auto-discovering, it's a static cluster, in which each member is listed.

Configuring the cluster

The cluster configuration is composed of several part:

credentials to authorize a node to join the cluster,
the list of member nodes
the Hazelcast management center

Cluster credentials

To protect the cluster to avoid unauthorized node to join it, you must define credentials:

<tns:petals-registry-overlay>
   <tns:credentials>
      <tns:group>default-sample</tns:group>
      <tns:password>s3cr3t</tns:password>
   </tns:credentials>
   ...
</tns:petals-registry-overlay>

Property name	Default value	Required	Description
`group`	-	yes	a name identifying the cluster
`password`	-	yes	the password

Member list

All members of the cluster must be listed:

<tns:petals-registry-overlay>
   ...
   <tns:members>
      <!-- Default listening port: 7900 -->
      <tns:member id="sample-member-0">localhost</tns:member>
      <tns:member id="sample-member-2" port="7902">192.168.1.56</tns:member>
   </tns:members>
</tns:petals-registry-overlay>

Property name	Default value	Required	Description
`member`	-	yes	Hostname or IP adress of the cluster member
`id`	-	yes	The member identifier that we retrieve in the local node configuration in the property `petals.registry.overlay.member.local-identifier`
`port`	7900	no	Listening port of the cluster member

Hazelcast Management Center

A Hazelcast Management center can be set at cluster level to monitor your Petals ESB Registry:

<tns:petals-registry-overlay>
   ...
   <!-- By default, the support of the Hazelcast Management Center is enable -->
   <tns:management-console enable="true">http://localhost:8080/mancenter</tns:management-console>
</tns:petals-registry-overlay>

Property name	Default value	Required	Description
`management-console`	-	yes	URL of the Hazelcast management center
`enable`	`false`	no	If `false`, the Hazelcast management center will not be enabled for the cluster members

Petals ESB 5.0.0+ Wiki

Helpful links

Cluster Configuration