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Migration Guide

Red Hat Fuse 7.4

Migrating to Red Hat Fuse 7.4

Fuse Documentation Team

Abstract

Use this guide to help you when upgrading your Fuse installation to the latest version of Red Hat Fuse.

Preface
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This guide provides information on updating Red Hat Fuse and Fuse applications:

Note

If you want to migrate from Fuse 6 to the latest Fuse 7 release, before you follow the instructions in this guide, you should follow the instructions in the Red Hat Fuse 7.0 Migration Guide.

Chapter 1, Upgrading Fuse applications on Spring Boot standalone

Chapter 2, Upgrading Fuse applications on JBoss EAP standalone

Chapter 3, Upgrading Fuse applications on Karaf standalone

Chapter 4, Upgrading Fuse Standalone on Karaf

To upgrade your Fuse applications on Spring Boot, you must update your Fuse project’s Maven dependencies to ensure that you are using the correct version of Fuse.

Typically, you use Maven to build Fuse applications. Maven is a free and open source build tool from Apache. Maven configuration is defined in a Fuse application project’s pom.xml file. While building a Fuse project, the default behavior is that Maven searches external repositories and downloads the required artifacts. You add a dependency for the Fuse Bill of Materials (BOM) to the pom.xml file so that the Maven build process picks up the correct set of Fuse supported artifacts.

The following sections provide information on Maven dependencies and how to update them in your Fuse projects.

1.1. About Maven dependencies
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The purpose of a Maven Bill of Materials (BOM) file is to provide a curated set of Maven dependency versions that work well together, saving you from having to define versions individually for every Maven artifact.

There is a dedicated BOM file for each container in which Fuse runs.

Note

You can find these BOM files here: https://github.com/jboss-fuse/redhat-fuse. Alternatively, go to the latest Release Notes for information on BOM file updates.

The Fuse BOM offers the following advantages:

  • Defines versions for Maven dependencies, so that you do not need to specify the version when you add a dependency to your pom.xml file.
  • Defines a set of curated dependencies that are fully tested and supported for a specific version of Fuse.
  • Simplifies upgrades of Fuse.
Important

Only the set of dependencies defined by a Fuse BOM are supported by Red Hat.

1.2. Updating your Fuse project’s Maven dependencies
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To upgrade your Fuse application for Spring Boot, update your project’s Maven dependencies.

Procedure

  1. Open your project’s pom.xml file.

  2. Add a dependencyManagement element in your project’s pom.xml file (or, possibly, in a parent pom.xml file), as shown in the following example: 

    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
<project ...>
  ...
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

    <!-- configure the versions you want to use here -->
    <fuse.version>7.4.0.fuse-740036-redhat-00002</fuse.version>

  </properties>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.jboss.redhat-fuse</groupId>
        <artifactId>fuse-springboot-bom</artifactId>
        <version>${fuse.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>
  ...
</project>
    Copy to Clipboard Toggle word wrap
    Note

    Ensure you update your Spring Boot version as well. This is typically found under the Fuse version in the pom.xml file: 

         <properties>
      <!-- configure the versions you want to use here -->
      <fuse.version>7.4.0.fuse-740036-redhat-00002</fuse.version>
      <spring-boot.version>1.5.19.RELEASE</spring-boot.version>
    </properties>
    Copy to Clipboard Toggle word wrap
  3. Save your pom.xml file.

After you specify the BOM as a dependency in your pom.xml file, it becomes possible to add Maven dependencies to your pom.xml file without specifying the version of the artifact. For example, to add a dependency for the camel-velocity component, you would add the following XML fragment to the dependencies element in your pom.xml file: 

<dependency>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-velocity</artifactId>
  <scope>provided</scope>
</dependency>
Copy to Clipboard Toggle word wrap

Note how the version element is omitted from this dependency definition.

To upgrade your Fuse applications on JBoss EAP, you must update your Fuse project’s Maven dependencies to ensure that you are using the correct version of Fuse.

Typically, you use Maven to build Fuse applications. Maven is a free and open source build tool from Apache. Maven configuration is defined in a Fuse application project’s pom.xml file. While building a Fuse project, the default behavior is that Maven searches external repositories and downloads the required artifacts. You add a dependency for the Fuse Bill of Materials (BOM) to the pom.xml file so that the Maven build process picks up the correct set of Fuse supported artifacts.

The following sections provide information on Maven dependencies and how to update them in your Fuse projects.

2.1. About Maven dependencies
复制链接

The purpose of a Maven Bill of Materials (BOM) file is to provide a curated set of Maven dependency versions that work well together, saving you from having to define versions individually for every Maven artifact.

There is a dedicated BOM file for each container in which Fuse runs.

Note

You can find these BOM files here: https://github.com/jboss-fuse/redhat-fuse. Alternatively, go to the latest Release Notes for information on BOM file updates.

The Fuse BOM offers the following advantages:

  • Defines versions for Maven dependencies, so that you do not need to specify the version when you add a dependency to your pom.xml file.
  • Defines a set of curated dependencies that are fully tested and supported for a specific version of Fuse.
  • Simplifies upgrades of Fuse.
Important

Only the set of dependencies defined by a Fuse BOM are supported by Red Hat.

2.2. Updating your Fuse project’s Maven dependencies
复制链接

To upgrade your Fuse application for JBoss EAP, update your project’s Maven dependencies.

Procedure

  1. Open your project’s pom.xml file.

  2. Add a dependencyManagement element in your project’s pom.xml file (or, possibly, in a parent pom.xml file), as shown in the following example: 

    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
<project ...>
  ...
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

    <!-- configure the versions you want to use here -->
    <fuse.version>7.4.0.fuse-740036-redhat-00002</fuse.version>

  </properties>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.jboss.redhat-fuse</groupId>
        <artifactId>fuse-eap-bom</artifactId>
        <version>${fuse.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>
  ...
</project>
    Copy to Clipboard Toggle word wrap
  3. Save your pom.xml file.

After you specify the BOM as a dependency in your pom.xml file, it becomes possible to add Maven dependencies to your pom.xml file without specifying the version of the artifact. For example, to add a dependency for the camel-velocity component, you would add the following XML fragment to the dependencies element in your pom.xml file: 

<dependency>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-velocity</artifactId>
  <scope>provided</scope>
</dependency>
Copy to Clipboard Toggle word wrap

Note how the version element is omitted from this dependency definition.

Chapter 3. Upgrading Fuse applications on Karaf standalone
复制链接

To upgrade your Fuse applications on Karaf, you must update your Fuse project’s Maven dependencies to ensure that you are using the correct version of Fuse.

Typically, you use Maven to build Fuse applications. Maven is a free and open source build tool from Apache. Maven configuration is defined in a Fuse application project’s pom.xml file. While building a Fuse project, the default behavior is that Maven searches external repositories and downloads the required artifacts. You add a dependency for the Fuse Bill of Materials (BOM) to the pom.xml file so that the Maven build process picks up the correct set of Fuse supported artifacts.

The following sections provide information on Maven dependencies and how to update them in your Fuse projects.

3.1. About Maven dependencies
复制链接

The purpose of a Maven Bill of Materials (BOM) file is to provide a curated set of Maven dependency versions that work well together, saving you from having to define versions individually for every Maven artifact.

There is a dedicated BOM file for each container in which Fuse runs.

Note

You can find these BOM files here: https://github.com/jboss-fuse/redhat-fuse. Alternatively, go to the latest Release Notes for information on BOM file updates.

The Fuse BOM offers the following advantages:

  • Defines versions for Maven dependencies, so that you do not need to specify the version when you add a dependency to your pom.xml file.
  • Defines a set of curated dependencies that are fully tested and supported for a specific version of Fuse.
  • Simplifies upgrades of Fuse.
Important

Only the set of dependencies defined by a Fuse BOM are supported by Red Hat.

3.2. Updating your Fuse project’s Maven dependencies
复制链接

To upgrade your Fuse application for Karaf, update your project’s Maven dependencies.

Procedure

  1. Open your project’s pom.xml file.

  2. Add a dependencyManagement element in your project’s pom.xml file (or, possibly, in a parent pom.xml file), as shown in the following example: 

    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
<project ...>
  ...
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

    <!-- configure the versions you want to use here -->
    <fuse.version>7.4.0.fuse-740036-redhat-00002</fuse.version>

  </properties>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.jboss.redhat-fuse</groupId>
        <artifactId>fuse-karaf-bom</artifactId>
        <version>${fuse.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>
  ...
</project>
    Copy to Clipboard Toggle word wrap
  3. Save your pom.xml file.

After you specify the BOM as a dependency in your pom.xml file, it becomes possible to add Maven dependencies to your pom.xml file without specifying the version of the artifact. For example, to add a dependency for the camel-velocity component, you would add the following XML fragment to the dependencies element in your pom.xml file: 

<dependency>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-velocity</artifactId>
  <scope>provided</scope>
</dependency>
Copy to Clipboard Toggle word wrap

Note how the version element is omitted from this dependency definition.

Chapter 4. Upgrading Fuse Standalone on Karaf
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The Fuse on Apache Karaf upgrade mechanism enables you to apply fixes to an Apache Karaf container without needing to reinstall an updated version of Fuse on Karaf. It also allows you to roll back the upgrade, if the upgrade causes problems with your deployed applications.

The upgrade installer file is the same file that you use to install Fuse on Apache Karaf.

Note

To obtain the upgrade installer file, go to the Downloads page of the Red Hat customer portal and download the latest version of the installation archive for Fuse on Apache Karaf (for example, fuse-karaf-7.4.0.fuse-740028-redhat-00001.zip).

4.1. Impact of upgrading Fuse on Karaf
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The upgrade mechanism can make updates to any installation files including bundle JARs and static files (including, for example, configuration files under the etc/ directory). The Fuse on Apache Karaf upgrade process:

  • Updates any files, including bundle JARs, configuration files, and any static files.
  • Patches both the current container instance (and its runtime storage under the data/ directory) and the underlying installation. Hence, patches are preserved after deleting a container instance.
  • Updates all of the files related to Karaf features, including the features repository files and the features themselves. Hence, any features installed after the rollup patch will reference the correct patched dependencies.
  • If necessary, updates configuration files (for example, files under etc/), automatically merging any configuration changes you have made with the configuration changes made by the patch. If merge conflicts occur, see the patch log for details of how they are handled.
  • Most of the merge conflicts are resolved automatically. For example, the patch mechanism detects conflicts at property level for the property files. It detects whether it was a user or patch that changed any property. The change is preserved, if only one side changed the property.

  • Tracks all of the changes made to the installation (including to static files), so that it is possible to roll back the patch.

    Note

    The rollup patching mechanism uses an internal git repository (located under patches/.management/history) to track the changes made.

4.2. Upgrading Fuse Standalone on Karaf
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The following instructions guide you through upgrading Fuse on Apache Karaf. Ensure all prerequisites are completed before commencing the upgrade procedure.

Prerequisites

  • Ensure you have a full backup of your Fuse on Apache Karaf installation before upgrading.
  • Start the container, if it is not already running.
Tip

If the container is running in the background (or remotely), connect to the container using the SSH console client, bin/client.

  • Add the upgrade installer file to the container’s environment by invoking the patch:add command. For example, to add the fuse-karaf-7.4.0.fuse-740028-redhat-00001.zip upgrade installer file: 

    patch:add file:///path/to/fuse-karaf-7.4.0.fuse-740028-redhat-00001.zip
    Copy to Clipboard Toggle word wrap

Procedure

  1. Run the patch:update command. There is no need to restart the container. 

    karaf@root()> patch:update
Current patch mechanism version: 7.1.0.fuse-710023-redhat-00001
New patch mechanism version detected: 7.2.0.fuse-720035-redhat-00001
Uninstalling patch features in version 7.1.0.fuse-710023-redhat-00001
Installing patch features in version 7.2.0.fuse-720035-redhat-00001
    Copy to Clipboard Toggle word wrap

  2. Invoke the patch:list command to display a list of upgrade installers. In this list, the entries under the [name] heading are upgrade IDs. For example: 

    karaf@root()> patch:list
[name]                                    [installed] [rollup] [description]
fuse-karaf-7.2.0.fuse-720035-redhat-00001 false       true     fuse-karaf-7.2.0.fuse-720035-redhat-00001
    Copy to Clipboard Toggle word wrap

  3. Simulate the upgrade by invoking the patch:simulate command and specifying the upgrade ID for the upgrade that you want to apply, as follows: 

    karaf@root()> patch:simulate fuse-karaf-7.2.0.fuse-720035-redhat-00001
INFO : org.jboss.fuse.modules.patch.patch-management (226): Installing rollup patch "fuse-karaf-7.2.0.fuse-720035-redhat-00001"
========== Repositories to remove (9):
 - mvn:io.hawt/hawtio-karaf/2.0.0.fuse-710018-redhat-00002/xml/features
...
========== Repositories to add (9):
 - mvn:io.hawt/hawtio-karaf/2.0.0.fuse-720044-redhat-00001/xml/features
...
========== Repositories to keep (10):
 - mvn:org.apache.activemq/artemis-features/2.4.0.amq-711002-redhat-1/xml/features
...
========== Features to update (100):
[name]                         [version]                         [new version]
aries-blueprint                4.2.0.fuse-710024-redhat-00002    4.2.0.fuse-720061-redhat-00001
...
========== Bundles to update as part of features or core bundles (100):
[symbolic name]                                                [version]                         [new location]
io.hawt.hawtio-log                                             2.0.0.fuse-710018-redhat-00002    mvn:io.hawt/hawtio-log/2.0.0.fuse-720044-redhat-00001
...
========== Bundles to reinstall as part of features or core bundles (123):
[symbolic name]                                                [version]                         [location]
com.fasterxml.jackson.core.jackson-annotations                 2.8.11                            mvn:com.fasterxml.jackson.core/jackson-annotations/2.8.11
...
Simulation only - no files and runtime data will be modified.
karaf@root()>
    Copy to Clipboard Toggle word wrap

    This generates a log of the changes that will be made to the container when the upgrade is performed, but will not make any actual changes to the container. Review the simulation log to understand the changes that will be made to the container.

  4. Upgrade the container by invoking the patch:install command and specifying the upgrade ID for the upgrade that you want to apply. For example: 

    karaf@root()> patch:install fuse-karaf-7.4.0.fuse-740028-redhat-00001
    Copy to Clipboard Toggle word wrap

  5. Validate the upgrade, by searching for one of the upgrade artifacts. For example, if you had just upgraded Fuse 7.1.0 to Fuse 7.2.0, you could search for bundles with the build number, 740028, as follows: 

    karaf@root()> bundle:list -l | grep 740028
 22 │ Active │  80 │ 7.4.0.fuse-740028-redhat-00001  │ mvn:org.jboss.fuse.modules/fuse-pax-transx-tm-narayana/7.4.0.fuse-740028-redhat-00001
188 │ Active │  80 │ 7.4.0.fuse-740028-redhat-00001  │ mvn:org.jboss.fuse.modules.patch/patch-commands/7.4.0.fuse-740028-redhat-00001
    Copy to Clipboard Toggle word wrap
Note

After upgrading, you also see the new version and build number in the Welcome banner when you restart the container.

4.3. Rolling back an upgrade for Fuse on Karaf
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Occasionally an upgrade might not work or might introduce new issues to a container. In these cases, you can easily roll back the upgrade and restore your system to its previous state using the patch:rollback command. This set of instructions guides you through this procedure.

Prerequisites

  • You have recently upgraded Fuse on Karaf.
  • You want to rollback the upgrade.

Procedure

  1. Invoke the patch:list command to obtain the upgrade ID, UPGRADE_ID, of the most recently installed patch.

  2. Invoke the patch:rollback command, as follows: 

    patch:rollback UPGRADE_ID
    Copy to Clipboard Toggle word wrap
    Note

    In some cases the container needs to restart to roll back the upgrade. In these cases, the container restarts automatically. Due to the highly dynamic nature of the OSGi runtime, during the restart you might see some occasional errors related to incompatible classes. These errors are related to OSGi services that have just started or stopped and can be safely ignored.

Legal Notice
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Copyright © 2019 Red Hat, Inc.
The text of and illustrations in this document are licensed by Red Hat under a Creative Commons Attribution–Share Alike 3.0 Unported license ("CC-BY-SA"). An explanation of CC-BY-SA is available at http://creativecommons.org/licenses/by-sa/3.0/. In accordance with CC-BY-SA, if you distribute this document or an adaptation of it, you must provide the URL for the original version.
Red Hat, as the licensor of this document, waives the right to enforce, and agrees not to assert, Section 4d of CC-BY-SA to the fullest extent permitted by applicable law.
Red Hat, Red Hat Enterprise Linux, the Shadowman logo, the Red Hat logo, JBoss, OpenShift, Fedora, the Infinity logo, and RHCE are trademarks of Red Hat, Inc., registered in the United States and other countries.
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