Java Reference
In-Depth Information
Starting a cluster of domain nodes
In order to configure a cluster running on a domain of server nodes, you need to configure
the main
domain.xml
file for your domain controller. Then, for every WildFly host that
is a part of the cluster, you need to provide a
host.xml
configuration file, which de-
scribes the configuration of a single-server distribution.
The domain controller configuration
The
domain.xml
file is located at
JBOSS_HOME/domain/configuration/
. It in-
cludes the main domain configuration, which is shared by all server instances. In the
do-
main.xml
file, we will define the server group configurations specifying a profile that is
compatible with clustering. Out of the box, a WildFly domain ships with four different pro-
files:
•
default
: This profile has the support of Java EE Web Profile and some exten-
sions, such as RESTful web services, or support for
Enterprise JavaBeans
(
EJB
)
3 remote invocations
•
full
: This profile supports all the default subsystems contained in the default
profile and the messaging subsystem
•
ha
: This profile corresponds to the
default
profile extended with clustering
capabilities
•
full-ha
: This is the
full
profile with clustering capabilities
So, first specify a cluster-aware profile for your server groups in your
domain.xml
file.
In our example, we have adopted the
full-ha
profile for both the server groups so that
you can run the full Java EE stack on all your domain servers:
<server-groups>
<server-group name="main-server-group" profile="full-ha">
<jvm name="default">
<heap size="64m" max-size="512m"/>
</jvm>
<socket-binding-group ref="
full-ha-sockets
"/>
</server-group>
<server-group name="other-server-group"
profile="full-ha">
<jvm name="default">
<heap size="64m" max-size="512m"/>
