制作 Docker 镜像，用来下载 OpenJDK11 源码，分享一点面试小经验

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COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b d$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b l$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b t$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c b$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c j$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c r$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c z$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d h$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d p$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d x$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - e f$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a g$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a o$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a w$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b e$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b m$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b u$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c c$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c k$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c s$ SRC_PATH/

COP

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复制代码

Y ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d a$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d i$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d q$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d y$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - e g$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a h$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a p$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a x$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b f$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b n$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b v$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c d$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c l$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c t$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d b$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d j$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d r$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d z$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - e h$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a a$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a i$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a q$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a y$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b g$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b o$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b w$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c e$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c m$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c u$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d c$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d k$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d s$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - e a$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - e i$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a b$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a j$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a r$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a z$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b h$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b p$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b x$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c f$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c n$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c v$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d d$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d l$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d t$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - e b$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - e j$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a c$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a k$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a s$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b a$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b i$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b q$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b y$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c g$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c o$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c w$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d e$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d m$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d u$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - e c$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - e k$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a d$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a l$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a t$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b b$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b j$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b r$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b z$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c h$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c p$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c x$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d f$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d n$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d v$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - e d$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - e l$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a e$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a m$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - a u$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b c$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b k$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - b s$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c a$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c i$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c q$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - c y$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d g$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d o$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - d w$ SRC_PATH/

COPY ./ $O P E N J D K_{S} R C_{P} A C K A G E_{N} A M E - e e$ SRC_PATH/

#命令行文件复制到工作目录

COPY ./cmd.sh /

RUN chmod a+x /cmd.sh

CMD ["bash", "/cmd.sh"]

看到这里您一定会有疑问：这么多行 COPY 命令，为什么不用 OPENJDK_SRC_PACKAGE_NAME-*，这样岂不是一行命令就够了？

您可以在镜像 build 成功后，用 docker history 命令看看文件的 layer 数量，用多个 COPY 命令逐个执行，每个命令都对应一个小的 layer，这样用户下载镜像时就是在下载多个小文件了；

[](

)cmd.sh 文件

cmd.sh 的内容如下，可见当容器启动后，先将分割后的多个小文件通过 cat 命令恢复成完整的 jdk11.tar.gz 文件，再解压，然后删除 jdk11.tar.gz 文件：

echo "start build gz file"

cat $S R C_{P} A T H /$ OPENJDK_SRC_PACKAGE_NAME-* > /output/$OPENJDK_SRC_PACKAGE_NAME.tar.gz

echo "gz file build success, start unzip"

tar -zxvf /output/$OPENJDK_SRC_PACKAGE_NAME.tar.gz -C /output

echo "unzip success, start remove gz file"

发布于: 刚刚阅读数: 2

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制作 Docker 镜像，用来下载 OpenJDK11 源码，分享一点面试小经验

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