5.12. 在离线和 air-gapped 环境中构建 bootc 镜像

流程

1. 创建 Containerfile。例如：

   # Base image to point to your internal registry
   FROM example.com:1234/rhel10/rhel-bootc:10.2
   
   # Configure the local repo to use the files already present in the image
   # Assuming the repo data is located at /etc/pki/repos or similar inside the image
   RUN echo -e "[local-baseos]\n\
   name=Local RHEL 10 BaseOS\n\
   baseurl=file:///path/to/repo/in/image/BaseOS\n\
   enabled=1\n\
   gpgcheck=0" > /etc/yum.repos.d/local.repo
   
   # Install your required packages using the local file source
   RUN dnf install -y firewalld && \
      dnf clean all
   
   # Ensure the kernel and bootloader are present
   # In air-gapped bootc, BIB often fails because it expects to download these.
   # Pre-installing them ensures they are part of the 'bootc' transition.
   RUN dnf install -y kernel-bootc anaconda-dracut-modules && dnf clean all

2. 使用 bootc-image-builder 工具将 Containerfile 转换为可引导格式，如 ISO、原始、QCOW2。请参阅使用 bootc-image-builder 创建与引导兼容的基本磁盘镜像。