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Chapter 26. Configure JGroups
JGroups is the underlying group communication library used to connect Red Hat JBoss Data Grid instances. For a full list of JGroups protocols supported in JBoss Data Grid, see Section A.1, “Supported JGroups Protocols”
26.1. Configure Red Hat JBoss Data Grid Interface Binding (Remote Client-Server Mode)
26.1.1. Interfaces
Red Hat JBoss Data Grid allows users to specify an interface type rather than a specific (unknown) IP address.
link-local: Uses a169.x.x.xor254.x.x.xaddress. This suits the traffic within one box.<interfaces> <interface name="link-local"> <link-local-address/> </interface> <!-- Additional configuration elements here --> </interfaces>site-local: Uses a private IP address, for example192.168.x.x. This prevents extra bandwidth charged from GoGrid, and similar providers.<interfaces> <interface name="site-local"> <site-local-address/> </interface> <!-- Additional configuration elements here --> </interfaces>global: Picks a public IP address. This should be avoided for replication traffic.<interfaces> <interface name="global"> <any-address/> </interface> <!-- Additional configuration elements here --> </interfaces>non-loopback: Uses the first address found on an active interface that is not a127.x.x.xaddress.<interfaces> <interface name="non-loopback"> <not> <loopback /> </not> </interface> </interfaces>
26.1.2. Binding Sockets
Socket bindings provide a named the combination of interface and port. Sockets can be bound to the interface either individually or using a socket binding group.
26.1.2.1. Binding a Single Socket Example
The following is an example depicting the use of JGroups interface socket binding to bind an individual socket using the
socket-binding element.
Example 26.1. Socket Binding
<socket-binding name="jgroups-udp" <!-- Additional configuration elements here --> interface="site-local"/>
26.1.2.2. Binding a Group of Sockets Example
The following is an example depicting the use of Groups interface socket bindings to bind a group, using the
socket-binding-group element:
Example 26.2. Bind a Group
<socket-binding-group name="ha-sockets" default-interface="global"> <!-- Additional configuration elements here --> <socket-binding name="jgroups-tcp" port="7600"/> <socket-binding name="jgroups-tcp-fd" port="57600"/> <!-- Additional configuration elements here --> </socket-binding-group>
The two sample socket bindings in the example are bound to the same
default-interface (global), therefore the interface attribute does not need to be specified.
26.1.3. Configure JGroups Socket Binding
Each JGroups stack, configured in the JGroups subsystem, uses a specific socket binding. Set up the socket binding as follows:
Example 26.3. JGroups Socket Binding Configuration
<subsystem xmlns="urn:jboss:domain:jgroups:1.2" default-stack="udp">
<stack name="udp">
<transport type="UDP" socket-binding="jgroups-udp">
<!-- Additional configuration elements here -->
</transport>
<!-- rest of protocols -->
</stack>
</subsystem>Important
When using UDP as the JGroups transport, the socket binding has to specify the regular (unicast) port, multicast address, and multicast port.
