6.8. Injecting configuration into the resulting disk images with bootc-image-builder

Procedure

1. Create a ./config.toml. The following example shows how to add a user to the disk image.

   [[customizations.user]]
   name = "user"
   password = "pass"
   key = "ssh-rsa AAA ... user@email.com"
   groups = ["wheel"]

   • name - Mandatory. Name of the user.
   • password - Not mandatory. Nonencrypted password.
   • key - Not mandatory. Public SSH key contents.
   • groups - Not mandatory. An array of groups to add the user into.

2. Run bootc-image-builder and pass the following arguments, including the ./config.toml:

   $ sudo podman run \
       --rm \
       -it \
       --privileged \
       --pull=newer \
       --security-opt label=type:unconfined_t \
       -v ./config.toml:/config.toml \
       -v ./output:/output \
       registry.redhat.io/rhel10/bootc-image-builder:latest \
       --type qcow2 \
       --config config.toml \
       quay.io/<namespace>/<image>:<tag>

3. Launch a VM, for example, by using virt-install:

   $ sudo virt-install \
     --name bootc \
     --memory 4096 \
     --vcpus 2 \
     --disk qcow2/disk.qcow2 \
     --import \
     --os-variant rhel10