7.2. Using the UBI micro images

Procedure

1. Pull and build the registry.access.redhat.com/ubi10/ubi-micro image:

   # microcontainer=$(buildah from registry.access.redhat.com/ubi10/ubi-micro)

2. Mount a working container root filesystem:

   # micromount=$(buildah mount $microcontainer)

3. Install the httpd service to the micromount directory:

   # dnf install \
       --installroot $micromount \
       --releasever=/ \
       --setopt install_weak_deps=false \
       --setopt=reposdir=/etc/yum.repos.d/ \
       --nodocs -y \
       httpd
   # dnf clean all \
       --installroot $micromount

4. Unmount the root file system on the working container:

   # buildah umount $microcontainer

5. Create the ubi-micro-httpd image from a working container:

   # buildah commit $microcontainer ubi-micro-httpd

Verification

1. Display details about the ubi-micro-httpd image:

   # podman images ubi-micro-httpd
   localhost/ubi-micro-httpd latest 7c557e7fbe9f  22 minutes ago  151 MB