92 lines
4 KiB
Text
Executable file
92 lines
4 KiB
Text
Executable file
|
|
=== Setting Up a Load Balancer
|
|
|
|
This section only covers configuring the built in load balancer that is discussed in the
|
|
<<fake/../../operating-mode/domain.adoc#_clustered-domain-example, Clustered Domain Example>>.
|
|
The link:{{book.appserver.loadbalancer.link}}[the load balancer] chapter of the {{book.appserver.loadbalancer.name}}
|
|
has information on using some other software based load balancers that may help you.
|
|
|
|
The <<fake/../../operating-mode/domain.adoc#_clustered-domain-example, Clustered Domain Example>> is only designed to run
|
|
on one machine. To bring up a slave on another host, you'll need to
|
|
|
|
. Edit the _domain.xml_ file to point to your new host slave
|
|
. Copy the server distribution. You don't need the _domain.xml_, _host.xml_, or _host-master.xml_ files. Nor do you need
|
|
the _standalone/_ directory.
|
|
. Edit the _host-slave.xml_ file to change the bind addresses used or override them on the command line
|
|
|
|
==== Register a New Host With Load Balancer
|
|
|
|
Let's look first at registering the new host slave with the load balancer configuration in _domain.xml_. Open this
|
|
file and go to the undertow configuration in the `load-balancer` profile. Add a new `host` definition called
|
|
`remote-host3` within the `reverse-proxy` XML block.
|
|
|
|
.domain.xml reverse-proxy config
|
|
[source,xml]
|
|
----
|
|
<subsystem xmlns="urn:jboss:domain:undertow:3.0">
|
|
...
|
|
<handlers>
|
|
<reverse-proxy name="lb-handler">
|
|
<host name="host1" outbound-socket-binding="remote-host1" scheme="ajp" path="/" instance-id="myroute1"/>
|
|
<host name="host2" outbound-socket-binding="remote-host2" scheme="ajp" path="/" instance-id="myroute2"/>
|
|
<host name="remote-host3" outbound-socket-binding="remote-host3" scheme="ajp" path="/" instance-id="myroute3"/>
|
|
</reverse-proxy>
|
|
</handlers>
|
|
...
|
|
</subsystem>
|
|
----
|
|
|
|
The `output-socket-binding` is a logical name pointing to a `socket-binding` configured later in the _domain.xml_ file.
|
|
the `instance-id` attribute must also be unique to the new host as this value is used by a cookie to enable sticky
|
|
sessions when load balancing.
|
|
|
|
Next go down to the `load-balancer-sockets` `socket-binding-group` and add the `outbound-socket-binding` for `remote-host3`. This new
|
|
binding needs to point to the host and port of the new host.
|
|
|
|
.domain.xml outbound-socket-binding
|
|
[source,xml]
|
|
----
|
|
<socket-binding-group name="load-balancer-sockets" default-interface="public">
|
|
...
|
|
<outbound-socket-binding name="remote-host1">
|
|
<remote-destination host="localhost" port="8159"/>
|
|
</outbound-socket-binding>
|
|
<outbound-socket-binding name="remote-host2">
|
|
<remote-destination host="localhost" port="8259"/>
|
|
</outbound-socket-binding>
|
|
<outbound-socket-binding name="remote-host3">
|
|
<remote-destination host="192.168.0.5" port="8259"/>
|
|
</outbound-socket-binding>
|
|
</socket-binding-group>
|
|
----
|
|
|
|
==== Master Bind Addresses
|
|
|
|
Next thing you'll have to do is to change the `public` and `management` bind addresses for the master host. Either
|
|
edit the _domain.xml_ file as discussed in the <<fake/../../network/bind-address.adoc#_bind-address, Bind Addresses>> chapter
|
|
or specify these bind addresses on the command line as follows:
|
|
|
|
[source]
|
|
----
|
|
$ domain.sh --host-config=host-master.xml -Djboss.bind.address=192.168.0.2 -Djboss.bind.address.management=192.168.0.2
|
|
----
|
|
|
|
==== Host Slave Bind Addresses
|
|
|
|
Next you'll have to change the `public`, `management`, and domain controller bind addresses (`jboss.domain.master-address`). Either edit the
|
|
_host-slave.xml_ file or specify them on the command line as follows:
|
|
|
|
[source]
|
|
----
|
|
$ domain.sh --host-config=host-slave.xml
|
|
-Djboss.bind.address=192.168.0.5
|
|
-Djboss.bind.address.management=192.168.0.5
|
|
-Djboss.domain.master.address=192.168.0.2
|
|
----
|
|
|
|
The values of `jboss.bind.address` and `jboss.bind.addres.management` pertain to the host slave's IP address.
|
|
The value of `jboss.domain.master.address` need to be the IP address of the domain controller which is the management address
|
|
of the master host.
|
|
|
|
|
|
|