The rhel10/rhel-bootc container image includes the dnf package manager. You can use dnf for several use cases:

Using dnf as a part of a container build

You can use the RUN dnf install directive in the Containerfile.

Using dnf at runtime

Warning

The functionality depends on the dnf version. You might get an error: error: can’t create transaction lock on /usr/share/rpm/.rpm.lock (Read-only file system).

You can use the bootc-usr-overlay command to create a writable overlay filesystem for /usr directory. The dnf install writes to this overlay and you can use it for installing debugging tools. Note that changes are lost on reboot.

Configuring storage

The supported storage technologies are the following:

• xfs/ext4
• Logical volume management (LVM)
• Linux Unified Key Setup (LUKS)

You can add other storage packages to the host system.

• Storage with bootc-image-builder You can use the bootc-image-builder tool to create a disk image. The available configuration for partitioning and layout is relatively fixed. The default filesystem type is derived from the container image’s bootc install configuration.
• Storage with bootc install You can use the bootc install to-disk command for flat storage configurations and bootc install to-filesystem command for more advanced installations. For more information see Advanced installation with to-filesystem and to-disk.