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2016-04-22 20:02:59 +00:00
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[[_standalone-ha-mode]]
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=== Standalone Clustered Mode
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Standalone clustered operation mode is for when you want to run {{book.project.name}} within a cluster. This mode
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requires that you have a copy of the {{book.project.name}} distribution on each machine you want to run a server instance.
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This mode can be very easy to deploy initially, but can become quite cumbersome. To make a configuration change
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you'll have to modify each distribution on each machine. For a large cluster this can become time consuming and error prone.
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==== Standalone Clustered Configuration
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The distribution has a mostly pre-configured app server configuration file for running within a cluster. It has all the specific
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infrastructure settings for networking, databases, caches, and discovery. This file resides
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in _.../standalone/configuration/standalone-ha.xml_. There's a few things missing from this configuration.
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You can't run {{book.project.name}} in a cluster without a configuring a shared database connection. You also need to
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deploy some type of load balancer in front of the cluster. The <<fake/../../clustering.adoc#_clustering,clustering>> and
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<<fake/../../database.adoc#_database,database>> sections of this guide walk you though these things.
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.Standalone HA Config
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image:../../{{book.images}}/standalone-ha-config-file.png[]
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WARNING: Any changes you make to this file while the server is running will not take effect and may even be overwritten
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by the server. Instead use the the command line scripting or the web console of {{book.appserver.name}}. See
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the link:{{book.appserver.admindoc.link}}[_{{book.appserver.admindoc.name}}_] for more information.
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==== Standalone Clustered Boot Script
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You use the same boot scripts to start {{book.project.name}} as you do in standalone mode. The difference is that
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you pass in an additional flag to point to the HA config file.
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.Standalone Clustered Boot Scripts
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image:../../{{book.images}}/standalone-boot-files.png[]
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To boot the server:
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.Linux/Unix
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[source]
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----
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$ .../bin/standalone.sh --server-config=standalone-ha.xml
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----
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.Windows
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[source]
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----
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> ...\bin\standalone.bat --server-config=standalone-ha.xml
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----
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