Chapter 8. Patching Data Grid Server Installations

Procedure

1. Access the Red Hat customer portal.
2. Download the appropriate Data Grid server patch from the software downloads section.
3. Open a terminal window and navigate to $RHDG_HOME.

4. Start the CLI.

   $ bin/cli.sh
   [disconnected]>

5. Describe the patch file you downloaded.

   [disconnected]> patch describe /path/to/redhat-datagrid-$version-server-patch.zip
   Red Hat Data Grid patch target=$target_version source=$source_version created=$timestamp

   • $target_version is the Data Grid version that applies when you install the patch on a server.
   • $source_version is one or more Data Grid server versions where you can install the patch.

1. Run the md5sum or sha256sum command with the downloaded patch as the argument, for example:

   $ sha256sum redhat-datagrid-$version-server-patch.zip

2. Compare with the MD5 or SHA-256 checksum value on the Data Grid Software Details page.

Procedure

1. Navigate to $RHDG_HOME for a Data Grid server installation that has the target version for the patch you want to create.

2. Start the CLI.

   $ bin/cli.sh
   [disconnected]>

3. Use the patch create command to generate a patch archive and include the -q option with a meaningful qualifier to describe the patch.

   [disconnected]> patch create -q "this is my test patch" path/to/mypatch.zip \
   path/to/target/server/home path/to/source/server/home

   The preceding command generates a .zip archive in the specified directory. Paths are relative to $RHDG_HOME for the target server.

   Tip

   Create single patches for multiple different Data Grid versions, for example:

   [disconnected]> patch create -q "this is my test patch" path/to/mypatch.zip \
   path/to/target/server/home \
   path/to/source/server1/home path/to/source/server2/home

   Where server1 and server2 are different Data Grid versions where you can install "mypatch.zip".

4. Describe the generated patch archive.

   [disconnected]> patch describe path/to/mypatch.zip
   
   Red Hat Data Grid patch target=$target_version(my test patch)  source=$source_version created=$timestamp

   • $target_version is the Data Grid server version from which the patch was created.

   • $source_version is one or more Data Grid server versions to which you can apply the patch.

     You can apply patches to Data Grid servers that match the $source_version only. Attempting to apply patches to other versions results in the following exception:

     java.lang.IllegalStateException: The supplied patch cannot be applied to `$source_version`

Procedure

1. Navigate to $RHDG_HOME for the Data Grid server you want to patch.

2. Stop the server if it is running.

   Note

   If you patch a server while it is running, the version changes take effect after restart. If you do not want to stop the server, create a new cluster with the target version and perform a rolling upgrade to that version instead of patching.

3. Start the CLI.

   $ bin/cli.sh
   [disconnected]>

4. Install the patch.

   [disconnected]> patch install path/to/patch.zip
   
   Red Hat Data Grid patch target=$target_version source=$source_version \
   created=$timestamp installed=$timestamp

   • $target_version displays the Data Grid version that the patch installed.
   • $source_version displays the Data Grid version before you installed the patch.

5. Start the server to verify the patch is installed.

   $ bin/server.sh
   ...
   ISPN080001: Red Hat Data Grid Server $version

   If the patch is installed successfully $version matches $target_version.

Procedure

1. Navigate to $RHDG_HOME for the Data Grid server installation you want to roll back.
2. Stop the server if it is running.

3. Start the CLI.

   $ bin/cli.sh
   [disconnected]>

4. List the installed patches.

   [disconnected]> patch ls
   
   Red Hat Data Grid patch target=$target_version source=$source_version
   created=$timestamp installed=$timestamp

   • $target_version is the Data Grid server version after the patch was applied.
   • $source_version is the version for Data Grid server before the patch was applied. Rolling back the patch restores the server to this version.

5. Roll back the last installed patch.

   [disconnected]> patch rollback

6. Quit the CLI.

   [disconnected]> quit

7. Start the server to verify the patch is rolled back to the previous version.

   $ bin/server.sh
   ...
   ISPN080001: Data Grid Server $version

   If the patch is rolled back successfully $version matches $source_version.