Question

我只有一个泊坞窗图片。

是否可以获取用于构建它的Docker文件？

若然，怎么样？

原因是我加载了图片，所以我没有源自它的Docker文件。

谢谢！

Answer 1

您可以查看运行的命令，以便在图像中创建每个图层 - 通过运行以下命令来查看有效的Dockerfile： -

docker history [IMAGE] | awk 'NR>1 {print $1}' | xargs docker inspect --format '{{ ((index .ContainerConfig.Cmd ) 0) }}'

如果你刚刚做了docker pull [IMAGE]，那么你可以在标准仓库中探索Dockerfile： -

https://hub.docker.com/explore/
https://github.com/docker-library/official-images

```

Answer 2

有一个docker容器（！）执行此操作（有一些限制），它被称为dockerfile-from-image

https://github.com/CenturyLinkLabs/dockerfile-from-image

查看（Ruby）代码

https://github.com/CenturyLinkLabs/dockerfile-from-image/blob/master/dockerfile-from-image.rb

启动此容器以进行自我分析的示例

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
   <widget id="com.example.my" version="1.0.0" xmlns="http://www.w3.org/ns/widgets" xmlns:cdv="http://cordova.apache.org/ns/1.0">
  <name>my example</name>
  <description>an example app
  </description>

<content src="index.html" />
<access origin="*" />
<preference name="webviewbounce" value="false" />
<preference name="UIWebViewBounce" value="false" />
<preference name="DisallowOverscroll" value="true" />
<preference name="BackupWebStorage" value="none" />
<preference name="auto-hide-splash-screen" value="false" />
<preference name="AutoHideSplashScreen" value="false" />
<preference name="SplashScreen" value="screen" />
<preference name="FadeSplashScreenDuration" value="1000" />
<preference name="orientation" value="portrait" />
<feature name="StatusBar">
    <param name="ios-package" onload="true" value="CDVStatusBar" />
</feature>
<platform name="android">
    <preference name="StatusBarBackgroundColor" value="#93bc26" />
    <preference name="android-minSdkVersion" value="19" />
    <preference name="SplashScreenDelay" value="50000" />
    <preference name="SplashMaintainAspectRatio" value="true" />
    <preference name="SplashShowOnlyFirstTime" value="false" />
    <splash density="port-ldpi" src="resources/android/splash/drawable-port-ldpi-screen.png" />
    <splash density="port-mdpi" src="resources/android/splash/drawable-port-mdpi-screen.png" />
    <splash density="port-hdpi" src="resources/android/splash/drawable-port-hdpi-screen.png" />
    <splash density="port-xhdpi" src="resources/android/splash/drawable-port-xhdpi-screen.png" />
    <splash density="port-xxhdpi" src="resources/android/splash/drawable-port-xxhdpi-screen.png" />
    <splash density="port-xxxhdpi" src="resources/android/splash/drawable-port-xxxhdpi-screen.png" />
    <icon density="ldpi" src="resources/android/icon/drawable-ldpi-icon.png" />
    <icon density="mdpi" src="resources/android/icon/drawable-mdpi-icon.png" />
    <icon density="hdpi" src="resources/android/icon/drawable-hdpi-icon.png" />
    <icon density="xhdpi" src="resources/android/icon/drawable-xhdpi-icon.png" />
    <icon density="xxhdpi" src="resources/android/icon/drawable-xxhdpi-icon.png" />
    <icon density="xxxhdpi" src="resources/android/icon/drawable-xxxhdpi-icon.png" />
</platform>
<platform name="ios">
    <preference name="SplashScreenDelay" value="1000" />
    <preference name="deployment-target" value="7.0" />
    <splash height="1136" src="resources/ios/splash/Default-568h@2x~iphone.png" width="640" />
    <splash height="1334" src="resources/ios/splash/Default-667h.png" width="750" />
    <splash height="2208" src="resources/ios/splash/Default-736h.png" width="1242" />
    <splash height="2048" src="resources/ios/splash/Default-Portrait@2x~ipad.png" width="1536" />
    <splash height="1024" src="resources/ios/splash/Default-Portrait~ipad.png" width="768" />
    <splash height="960" src="resources/ios/splash/Default@2x~iphone.png" width="640" />
    <splash height="480" src="resources/ios/splash/Default~iphone.png" width="320" />
    <icon height="57" src="resources/ios/icon/icon.png" width="57" />
    <icon height="114" src="resources/ios/icon/icon@2x.png" width="114" />
    <icon height="40" src="resources/ios/icon/icon-40.png" width="40" />
    <icon height="80" src="resources/ios/icon/icon-40@2x.png" width="80" />
    <icon height="120" src="resources/ios/icon/icon-40@3x.png" width="120" />
    <icon height="50" src="resources/ios/icon/icon-50.png" width="50" />
    <icon height="100" src="resources/ios/icon/icon-50@2x.png" width="100" />
    <icon height="60" src="resources/ios/icon/icon-60.png" width="60" />
    <icon height="120" src="resources/ios/icon/icon-60@2x.png" width="120" />
    <icon height="180" src="resources/ios/icon/icon-60@3x.png" width="180" />
    <icon height="72" src="resources/ios/icon/icon-72.png" width="72" />
    <icon height="144" src="resources/ios/icon/icon-72@2x.png" width="144" />
    <icon height="76" src="resources/ios/icon/icon-76.png" width="76" />
    <icon height="152" src="resources/ios/icon/icon-76@2x.png" width="152" />
    <icon height="167" src="resources/ios/icon/icon-83.5@2x.png" width="167" />
    <icon height="29" src="resources/ios/icon/icon-small.png" width="29" />
    <icon height="58" src="resources/ios/icon/icon-small@2x.png" width="58" />
    <icon height="87" src="resources/ios/icon/icon-small@3x.png" width="87" />
</platform>
<icon src="resources/android/icon/drawable-xxxhdpi-icon.png" />
<plugin name="com.telerik.plugins.nativepagetransitions" spec="~0.6.5" />
<plugin name="cordova-plugin-console" spec="~1.0.3" />
<plugin name="cordova-plugin-splashscreen" spec="~3.1.0" />
<plugin name="cordova-plugin-badge" spec="~0.7.2" />
<plugin name="cordova-plugin-statusbar" spec="~2.2.0" />
<plugin name="phonegap-plugin-push" spec="~1.8.2">
    <variable name="SENDER_ID" value="xxxxxxxxx" />
</plugin>
<plugin name="cordova-plugin-network-information" spec="~1.3.0" />

然后如果你启动它

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

Docker镜像到Docker文件

2 个答案: