19.5. 使用 Buildah 从 Containerfile 构建镜像

流程

1. 创建 Containerfile ：

   # cat Containerfile
   FROM registry.access.redhat.com/ubi9/ubi
   ADD myecho /usr/local/bin
   ENTRYPOINT "/usr/local/bin/myecho"

2. 创建 myecho 脚本：

   # cat myecho
   echo "This container works!"

3. 更改 myecho 脚本的访问权限：

   # chmod 755 myecho

4. 使用当前目录中的 Containerfile 构建 myecho 镜像：

   # buildah bud -t myecho .
   STEP 1: FROM registry.access.redhat.com/ubi9/ubi
   STEP 2: ADD myecho /usr/local/bin
   STEP 3: ENTRYPOINT "/usr/local/bin/myecho"
   STEP 4: COMMIT myecho
   ...
   Storing signatures

验证

1. 列出所有镜像：

   # buildah images
   REPOSITORY                                  TAG      IMAGE ID       CREATED              SIZE
   localhost/myecho                            latest   b28cd00741b3   About a minute ago   234 MB

2. 运行基于 localhost/myecho 镜像的 myecho 容器：

   # podman run --name=myecho localhost/myecho
   This container works!

3. 列出所有容器：

   # podman ps -a
   0d97517428d  localhost/myecho                                     12 seconds ago  Exited (0) 13 seconds ago          myecho