centos8stream-yum.def

BootStrap: yum
OSVersion: 8-stream
MirrorURL: http://mirror.centos.org/centos/%{OSVERSION}/BaseOS/x86_64/os/
Include: yum

# Build centos 8 stream container from yum bootstrap
# Serves as example for how to build container "from source"

# Build with --remote (or as root) due to problem with package 
# "filesystem" when --fakeroot is used for build, or 
# use workaround commented below

%help

Centos8 stream container from yum boostrap

%runscript

    echo "This is what happens when you run the container..."

%post

    echo "Hello from inside the container"

    # Works w/o --releasever but complains about missing release info
    # yum -y --releasever=8 install filesystem || (exit 0)
    # Workaround for build with --fakeroot
    # yum -y install filesystem || (exit 0)

    # Example package
    yum -y install vim-minimal

    # Example: prepare for /cvmfs bind-mount
    mkdir /cvmfs