Creating Customization Scripts

Scripts can customize the archive. Use these scripts for the following purposes:

• A precreation script validates the archive at creation time and prepares the archive for later customization, especially differential archives. This script also can create a user-defined section in the archive.

• A predeployment script validates the archive during installation and prepares the archive for later customization.

• A postdeployment script reconfigures a new system image on a clone system.

• A reboot script processes a final reconfiguration after the system is rebooted.

For guidelines about creating scripts, see Guidelines for Creating a Custom Script.

Creating a Precreation Script

This script runs during archive creation. The script has various uses.

• Validates the contents and the integrity of the software. The script fails the archive creation if the integrity is broken.

• Prepares products for later customization on clone system.

• Registers other installation scripts dynamically during archive creation.

• Adds a message to the flash-creation summary file. The message must be short and record only that scripts were started and finished and the results. You can view the results in the summary section.

For guidelines about creating the precreation script, see Guidelines for Creating a Custom Script. Then store the script in the /etc/flash/precreation directory.

Example 3-1 Excerpts From a Precreation Script

The following examples are excerpts from a precreation script.

• To log the start time in the summary section, use the following example:

  echo "Myapp precreation script started">> $FLASHDIR/summary

• To check the software integrity, use the flcheck command. This command cannot be used at the command line. The syntax for this command is as follows:

  flcheck Software component files and directories ...| -

  For example, to validate the files and directories, use the following example:

  flcheck Software component files and directories 
  If Not in selection - refuse creation
  
  echo "Myapp integrity damage">>$FLASHDIR/summary

  Or, to keep new files and directories that are unexpected and not fail the archive creation, use the following example:

  flcheck Software component files and directories 
  If Not in selection include by force
  flinclude Software component

• To register deployment scripts and data:

  • Copy the script to the /etc/flash/predeployment directory:

  • To register the script dynamically during archive creation, copy the script to the $FLASHDIR/predeployment directory.

• To add application-specific data in a user-defined section, use the following example:

  cp custom-section $FLASHDIR/custom_sections/Myapp

• To log the success of the installation in the summary section

  echo "product one flash preparation started." >>$FLASH_DIR/summary
  ...
  echo "product one flash preparation finished successfully">>$FLASH_DIR/summary

Example 3-2 Precreation Script

#!/bin/sh
echo "Test precreation script started" >> $FLASH_DIR/summary
cat /opt/TestApp/critical_file_list | flcheck -
if [ $? != 0 ]; then
        echo "Test precreation script failure" >> $FLASH_DIR/summary
        exit 1
fi
echo "Test precreation script started" >> $FLASH_DIR/summary
/opt/TestApplication/license_cloning
        $FLASH_DIR/predeployment/.TestApplicationLicenceTransfer \
        $FLASH_DIR/custom_sections/TestApplicationLicenceCounter
echo "Test precreation script finished" >> $FLASH_DIR/summary
exit 0

Using a Precreation Script to Create a User-Defined Archive Section

A precreation script can create a user-defined section in the archive to provide specific application information. This section is intended for archive maintenance. The script must be put in the $FLASH_DIR/sections directory. The flash archive does not process a user-defined section. For example, a section could contain a description of the archive or perhaps a script to check the integrity of an application.

A user-defined section requires the following format:

• Must be line oriented

• Must terminate with newline (ASCII 0x0a) characters

• Can have unlimited length of individual lines

• Must encode binary data by using base64 or a similar algorithm

The precreation script is run before the installation of the archive. If the script is meant to validate the archive, it is kept in the archive. If the script is meant to preserve local configurations on the clone system, it is kept on the clone system. This script also can analyze and collect local data necessary for later customization. For example, client-specific information can be saved before being overwritten by files about to be extracted. This information can then be used in the final stage after extraction.

For guidelines about creating the predeployment script, see Guidelines for Creating a Custom Script.

Store the script in one of the following directories:

• For archive validation, store in the /etc/flash/predeployment directory.

• If you are referencing with a precreation script, store in the $FLASH_DIR/preinstall directory.

• If you are preserving configurations on a clone system, provide the path to the script that is stored on the clone system with the local_customization keyword in the jumpstart profile.

Example 3-3 Predeployment Script

#!/bin/sh
$FLASH_DIR/TestApplication/check_hardware
if [ $? != 0 ]; then
        echo Unsupported hardware
        exit 1
fi
$FLASH_DIR/TestApplication/check_licence_key
if [ $? != 0 ]; then
    echo No license for this host
    exit 1
fi
        $FLASH_DIR/TestApplication/deploy_license_key \
        $FLASH_DIR/TestApplication/.TestApplicationLicenceTransfer
        $FLASH_DIR/TestApplication/save_data_files $FLASH_DIR/flash
exit 0

Creating a Postdeployment Script

The postdeployment script is kept in the archive or stored in a local directory on the clone system and runs after installation. The script reconfigures a new system image on a clone system. If the script is stored in the archive, the changes affect all the clone systems. If the script is stored in a local directory on the clone system, the changes affect only the clone system. For example, client-specific information that is saved by a predeployment script can be applied to the clone environment, completing the installation.

Postdeployment scripts can also be used to clean up files after the archive is installed. For example, log files such as the files in /var/adm can be cleaned out.

For guidelines about creating the postdeployment script, see Guidelines for Creating a Custom Script.

Store the script in one of the following directories:

• To affect all clone systems, store the script in the /etc/flash/postdeployment directory.

• To affect only a local clone system, provide the path to the script that is stored on the clone system with the local_customization keyword in the JumpStart profile.

Example 3-4 Postdeployment Script

#!/bin/sh
$FLASH_DIR/TestApplication/clone_reconfiguration
$FLASH_DIR/TestApplication/restore_data $FLASH_DIR/flash

Creating a Reboot Script

The reboot script is kept in the archive and runs after the system is rebooted. The script does any final configuration after system reconfiguration.

After you install the flash archive on a clone system, some host-specific files are deleted and are re-created for the clone machine. The installation program uses the sys-unconfig(1M) command and the sysidtool(1M) programs to delete and re-create host-specific network configuration files. The files that are re-created include, for example, /etc/hosts, /etc/defaultrouter, and /etc/defaultdomain. You can use the reboot script for any final reconfiguration.

Once you create the reboot script, store the script in the /etc/flash/reboot directory.

Example 3-5 Creating a Reboot Script

#!/bin/sh
$FLASH_DIR/TestApplication/finalize_license