Chapter 2. Setting up image builder
Use image builder to create your customized RHEL for Edge images. After you install image builder on a RHEL system, image builder is available as an application in RHEL web console. You can also access image builder through a command line interface in the
It is recommended to install image builder on a virtual machine.
In the environment where you want to install image builder, ensure that you first meet the system requirements and then install it.
2.1. Image builder system requirements
The environment where RHEL image builder runs, for example a virtual machine, must meet the requirements that are listed in the following table.
Running RHEL image builder inside a container is not supported.
Table 2.1. Image builder system requirements
Minimal Required Value
A dedicated virtual machine
Administrator level (root)
Connectivity to Internet
The 20 GiB disk space requirement is enough to install and run image builder in the host. To build and deploy image builds, you must allocate additional dedicated disk space.
2.2. Installing image builder
To install image builder on a dedicated virtual machine, follow these steps:
- The virtual machine is created and is powered on.
- You have installed RHEL and you have subscribed to RHSM or Red Hat Satellite.
You have enabled the
AppStreamrepositories to be able to install the RHEL image builder packages.
Install the following packages on the virtual machine.
# dnf install osbuild-composer composer-cli cockpit-composer bash-completion firewalld
Image builder is installed as an application in RHEL web console.
- Reboot the virtual machine
Configure the system firewall to allow access to the web console:
# firewall-cmd --add-service=cockpit && firewall-cmd --add-service=cockpit --permanent
Enable image builder.
# systemctl enable osbuild-composer.socket cockpit.socket --now
The osbuild-composer and cockpit services start automatically on first access.
Load the shell configuration script so that the autocomplete feature for the
composer-clicommand starts working immediately without reboot:
$ source /etc/bash_completion.d/composer-cli