docker pull chenzj/dfimage

alias dfimage="docker run -v /var/run/docker.sock:/var/run/docker.sock --rm chenzj/dfimage"

dfimage image_id

dfimage命令的输出如下:

$ dfimage 0f1947a021ce

FROM node:8
WORKDIR /usr/src/app

COPY file:e76d2e84545dedbe901b7b7b0c8d2c9733baa07cc821054efec48f623e29218c in ./
RUN /bin/sh -c npm install
COPY dir:a89a4894689a38cbf3895fdc0870878272bb9e09268149a87a6974a274b2184a in .

EXPOSE 8080
CMD ["npm" "start"]

docker pull chenzj/dfimage

alias dfimage="docker run -v /var/run/docker.sock:/var/run/docker.sock --rm chenzj/dfimage"

dfimage image_id

dfimage命令的输出如下:

$ dfimage 0f1947a021ce

FROM node:8
WORKDIR /usr/src/app

COPY file:e76d2e84545dedbe901b7b7b0c8d2c9733baa07cc821054efec48f623e29218c in ./
RUN /bin/sh -c npm install
COPY dir:a89a4894689a38cbf3895fdc0870878272bb9e09268149a87a6974a274b2184a in .

EXPOSE 8080
CMD ["npm" "start"]

不知何故，我完全错过了公认答案中的实际命令，所以在这里，它在自己的段落中更明显一些，看看有多少人像我一样

$ docker history --no-trunc <IMAGE_ID>

2018年12月更新宝马的答案

chenzj/dfimage -如hub.docker.com所述，从其他映像中重新生成Dockerfile。所以你可以这样使用它:

docker pull chenzj/dfimage
alias dfimage="docker run -v /var/run/docker.sock:/var/run/docker.sock --rm chenzj/dfimage"
dfimage IMAGE_ID > Dockerfile

如何从映像生成或反向Dockerfile ?

你可以。主要是。

注意:它不会生成一个Dockerfile，你可以直接使用docker build;输出结果仅供参考。

alias dfimage="docker run -v /var/run/docker.sock:/var/run/docker.sock --rm alpine/dfimage"
dfimage -sV=1.36 nginx:latest

它将自动拉出目标docker映像并导出Dockerfile。参数-sV=1.36并不总是必需的。

参考:https://hub.docker.com/repository/docker/alpine/dfimage

现在，如果您选择一个特定的标记，hub.docker.com将直接使用详细命令显示图像层。

奖金

如果您想知道每一层中哪些文件被更改

alias dive="docker run -ti --rm  -v /var/run/docker.sock:/var/run/docker.sock wagoodman/dive"
dive nginx:latest

在左边，您可以看到每个层的命令，在右边(用tab跳转)，黄线是该层中一些文件被更改的文件夹

(使用SPACE折叠目录)

旧的答案

下面是旧的答案，它不再工作了。

$ docker pull centurylink/dockerfile-from-image
$ alias dfimage="docker run -v /var/run/docker.sock:/var/run/docker.sock --rm centurylink/dockerfile-from-image"
$ dfimage --help
Usage: dockerfile-from-image.rb [options] <image_id>
    -f, --full-tree                  Generate Dockerfile for all parent layers
    -h, --help                       Show this message

image2df是什么

image2df是通过图像生成Dockerfile的工具。

这个工具是非常有用的，当你只有docker镜像，需要生成一个Dockerfile。

它是如何工作的

根据图像的历史信息进行反向解析。

如何使用这个图像

# Command alias
echo "alias image2df='docker run -v /var/run/docker.sock:/var/run/docker.sock --rm cucker/image2df'" >> ~/.bashrc
. ~/.bashrc

# Excute command
image2df <IMAGE>

See help docker run --rm cucker/image2df --help For example $ echo "alias image2df='docker run -v /var/run/docker.sock:/var/run/docker.sock --rm cucker/image2df'" >> ~/.bashrc $ . ~/.bashrc $ docker pull mysql $ image2df mysql ========== Dockerfile ========== FROM mysql:latest RUN groupadd -r mysql && useradd -r -g mysql mysql RUN apt-get update && apt-get install -y --no-install-recommends gnupg dirmngr && rm -rf /var/lib/apt/lists/* ENV GOSU_VERSION=1.12 RUN set -eux; \ savedAptMark="$(apt-mark showmanual)"; \ apt-get update; \ apt-get install -y --no-install-recommends ca-certificates wget; \ rm -rf /var/lib/apt/lists/*; \ dpkgArch="$(dpkg --print-architecture | awk -F- '{ print $NF }')"; \ wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch"; \ wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch.asc"; \ export GNUPGHOME="$(mktemp -d)"; \ gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4; \ gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu; \ gpgconf --kill all; \ rm -rf "$GNUPGHOME" /usr/local/bin/gosu.asc; \ apt-mark auto '.*' > /dev/null; \ [ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \ apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \ chmod +x /usr/local/bin/gosu; \ gosu --version; \ gosu nobody true RUN mkdir /docker-entrypoint-initdb.d RUN apt-get update && apt-get install -y --no-install-recommends \ pwgen \ openssl \ perl \ xz-utils \ && rm -rf /var/lib/apt/lists/* RUN set -ex; \ key='A4A9406876FCBD3C456770C88C718D3B5072E1F5'; \ export GNUPGHOME="$(mktemp -d)"; \ gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \ gpg --batch --export "$key" > /etc/apt/trusted.gpg.d/mysql.gpg; \ gpgconf --kill all; \ rm -rf "$GNUPGHOME"; \ apt-key list > /dev/null ENV MYSQL_MAJOR=8.0 ENV MYSQL_VERSION=8.0.24-1debian10 RUN echo 'deb http://repo.mysql.com/apt/debian/ buster mysql-8.0' > /etc/apt/sources.list.d/mysql.list RUN { \ echo mysql-community-server mysql-community-server/data-dir select ''; \ echo mysql-community-server mysql-community-server/root-pass password ''; \ echo mysql-community-server mysql-community-server/re-root-pass password ''; \ echo mysql-community-server mysql-community-server/remove-test-db select false; \ } | debconf-set-selections \ && apt-get update \ && apt-get install -y \ mysql-community-client="${MYSQL_VERSION}" \ mysql-community-server-core="${MYSQL_VERSION}" \ && rm -rf /var/lib/apt/lists/* \ && rm -rf /var/lib/mysql && mkdir -p /var/lib/mysql /var/run/mysqld \ && chown -R mysql:mysql /var/lib/mysql /var/run/mysqld \ && chmod 1777 /var/run/mysqld /var/lib/mysql VOLUME [/var/lib/mysql] COPY dir:2e040acc386ebd23b8571951a51e6cb93647df091bc26159b8c757ef82b3fcda in /etc/mysql/ COPY file:345a22fe55d3e6783a17075612415413487e7dba27fbf1000a67c7870364b739 in /usr/local/bin/ RUN ln -s usr/local/bin/docker-entrypoint.sh /entrypoint.sh # backwards compat ENTRYPOINT ["docker-entrypoint.sh"] EXPOSE 3306 33060 CMD ["mysqld"] reference