Chapter 7. Creating a boot ISO installer image with RHEL image builder

Procedure

1. Create the ISO image:

   # image-builder build iso --blueprint <blueprint_name>

   • <blueprint_name> with the name of the blueprint you created

   • <image_installer> is the image type

     The compose process starts and might take some minutes complete.

     RHEL image builder builds an .iso file that contains a .tar file. The .tar file is the image that is installed for the operating system. The .iso is set up to boot Anaconda and install the .tar file to set up the system.

1. Locate the .iso image that you built.

2. Mount the ISO image.

   $ mount -o ro <path_to_iso> /mnt

   You can find the .tar file at the /mnt/liveimg.tar.gz directory.

3. List the .tar file content:

   $ tar ztvf /mnt/liveimg.tar.gz

Procedure

1. On the RHEL image builder dashboard, locate the blueprint that you want to use to build your image. Optionally, enter the blueprint name or a part of it into the search box at the upper left, and click Enter.

2. On the right side of the blueprint, click the corresponding Create Image button.

   The Create image dialog wizard opens.

3. On the Create image dialog wizard:

   1. In the Image Type list, select "RHEL Installer (.iso)".
   2. Click Next.

   3. On the Review tab, click Create.

      After the build process is complete, you can see the image build complete status.

1. Click Download to save the "RHEL Installer (.iso)" image to your system.
2. Navigate to the folder where you downloaded the "RHEL Installer (.iso)" image.
3. Locate the .tar image you downloaded.

4. Extract the "RHEL Installer (.iso)" image content.

   $ tar -xf <content>.tar

Procedure

1. Write the bootable ISO image directly to the USB drive using the dd tool. For example:

   dd if=installer.iso of=/dev/sdX

   Where installer.iso is the ISO image file name and /dev/sdX is your USB flash drive device path.

2. Insert the flash drive into a USB port of the computer you want to boot.

3. Boot the ISO image from the USB flash drive.

   When the installation environment starts, you might need to complete the installation manually, similarly to the default Red Hat Enterprise Linux installation.