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Chapter 2. Installing RHEL image builder

RHEL image builder is a tool for creating custom system images. Before using RHEL image builder, you must install it.

2.1. RHEL image builder system requirements
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The host that runs RHEL image builder must meet the minimum system requirements.

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Table 2.1. RHEL image builder system requirements
ParameterMinimal Required Value

System type

A dedicated host or virtual machine. RHEL image builder is not supported in containers, including Red Hat Universal Base Images (UBI).

Processor

2 cores

Memory

4 GiB

Disk space

20 GiB of free space in the /var/cache/ filesystem

Access privileges

root

Network

Internet connectivity to the Red Hat Content Delivery Network (CDN).

Note

If you do not have internet connectivity, use RHEL image builder in isolated networks. For that, you must override the default repositories to point to your local repositories to not connect to Red Hat Content Delivery Network (CDN). Ensure that you have your content mirrored internally or use Red Hat Satellite.

2.2. Installing RHEL image builder
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Install RHEL image builder to have access to all the image-builder packages functionalities.

Prerequisites

  • You are logged in to the Red Hat Enterprise Linux host on which you want to install RHEL image builder.
  • The Red Hat Enterprise Linux host is subscribed to Red Hat Subscription Manager (RHSM) or Red Hat Satellite.
  • You have enabled the BaseOS and AppStream repositories to be able to install the RHEL image builder packages.

Procedure

  1. Install RHEL image builder and other necessary packages: 

    # dnf install image-builder cockpit-image-builder
    • image-builder is a service to build customized RHEL operating system images and enables access to the CLI interface.
    • cockpit-image-builder is a package that enables access to the Web UI interface. The web console is installed as a dependency of the cockpit-image-builder package.

  2. If you want to use RHEL image builder in the web console, enable and start it. 

    # systemctl enable --now cockpit.socket

    The image-builder and cockpit services start automatically on first access.

Verification

  • Verify that the installation works by running image-builder: 

    # image-builder list
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