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13.2. Creating a New Fabric
| Revision History | |
|---|---|
| 12/04/12 | |
| Clarified what happens when a fabric is created. | |
| 12/04/12 | |
| Added note about removing the default broker from the original container. | |
Overview
If there is no existing fabric for a broker to join, you will need to create one from the standalone broker. There are two options for how to do this:
- The recommended approach is to create the fabric such that the broker is converted into a managed Fabric Server. The container will revert to being a vanilla broker, so you will need to either create a new broker with the desired configuration or deploy an updated broker profile into the Fabric Server.Ensuring that the new broker is configured properly requires creating a broker profile with the proper settings. This can be done once the new fabric is created using the fabric:mq-create command. The fabric:mq-create command can also create the new broker.
- The alternative approach is to create the fabric such that the broker becomes a non-managed Fabric Server. The broker becomes a Fabric Server that is fully capable of being part of a fabric's ensemble. However, the broker retains control over its own configuration. It will continue to be managed as if it were a standalone broker and will not respond to fabric commands that attempt to alter its configuration.
Becoming a new fabric
Several things happen when a fabric is created from a standalone broker:
- The broker installs the required Fuse Fabric bundles to become a Fabric Server.
- The Fabric Server starts up the ensemble process.
- A new ensemble containing an empty configuration registry and a runtime registry with a single entry for the Fabric Server is created.
- The Fabric Server delegates control over its configuration to the ensemble.NoteIf the fabric is created with a non-managed server, this step is skipped.
- The ensemble associates the profiles required to be a Fabric Server with the container.
- Unless the
--no-importflag is used, the ensemble imports a set of profiles.- If the
--import-dirflag is used, the profiles are imported from the specified location. - If no location is specified the default set of profiles is imported from
InstallDir/fabric/import.
- The ensemble installs the default
mqprofile to the container.This starts a default broker instance in the container.NoteIf the fabric is created with a non-managed server, this step is skipped. - The ensemble waits for commands to update the fabric.
Procedure
To create a new fabric from a standalone broker:
- Delete the standalone broker configuration(s) from your installation's
/etcfolder.The configuration is stored in/etc/org.fusesource.mq.fabric.server-configName.cfg. - Connect to the standalone broker's command console.
- Remove any brokers running in the container.
- Use config:list to locate any PIDs using the form
org.fusesource.mq.fabric.server.ID. - Use config:delete to delete all of the PIDs using the form
org.fusesource.mq.fabric.server.ID.
- Enter the following command:
JBossA-MQ:karaf@root>fabric:createNoteIf you want to import a predefined set of profiles, use the-p import-diroption to specify the set of profiles to import. - Add a new broker to the fabric as described in Section 11.2, “Deploying a New Broker into a Fabric”.
