问题描述：

在本地向服务器上传镜像的过程中报错：

[INFO] Step 7/9 : ADD ./target/blade-auth.jar ./app.jar
[INFO] 
[ERROR] Error processing tar file(exit status 1): write /blade/auth/app.jar: no space left on device
[WARNING] An attempt failed, will retry 1 more times
org.apache.maven.plugin.MojoExecutionException: Could not build image
    at com.spotify.plugin.dockerfile.BuildMojo.buildImage (BuildMojo.java:247)
    at com.spotify.plugin.dockerfile.BuildMojo.execute (BuildMojo.java:135)
    at com.spotify.plugin.dockerfile.AbstractDockerMojo.tryExecute (AbstractDockerMojo.java:265)
    at com.spotify.plugin.dockerfile.AbstractDockerMojo.execute (AbstractDockerMojo.java:254)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: com.spotify.docker.client.exceptions.DockerException: Error processing tar file(exit status 1): write /blade/auth/app.jar: no space left on device
    at com.spotify.plugin.dockerfile.LoggingProgressHandler.handleError (LoggingProgressHandler.java:105)
    at com.spotify.plugin.dockerfile.LoggingProgressHandler.progress (LoggingProgressHandler.java:63)
    at com.spotify.docker.client.DefaultDockerClient$BuildProgressHandler.progress (DefaultDockerClient.java:312)
    at com.spotify.docker.client.ProgressStream.tail (ProgressStream.java:77)
    at com.spotify.docker.client.DefaultDockerClient$ResponseTailReader.call (DefaultDockerClient.java:2754)
    at com.spotify.docker.client.DefaultDockerClient$ResponseTailReader.call (DefaultDockerClient.java:2738)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:624)
    at java.lang.Thread.run (Thread.java:748)

解决过程：

开始以为提示的是说服务器上空间不足，但是查看了服务器的剩余资源，都是足够的。下面是服务器资源截图

导致问题的原因：

是因为我在本地一直执行docker镜像，所以他并没有是释放过我本地的以前的镜像资源。重复执行会导致同一个镜像存在本地多份。导致我本地的空间不足。然后我在本地手动释放了镜像资源，执行命令：docker image prune

执行的截图：

可以看到我释放了56g的本地资源。

然后执行镜像上传就好了，其实还是自己对docker是个什么东西不懂。