Remote DOCKER_HOST configuration does not work with ssh protocol

[vivekweb2013]

Description

When setting the remote docker host over ssh using DOCKER_HOST environment variable like below
export DOCKER_HOST="ssh://user@remotehost"

The plugin is still trying to connect using tcp and failing with timeout issue.

Why SSH?

I can open the tcp port for remote docker daemon but doing that involves additional configurations at firewall and service side, also setting ssl authentication is an additional overhead, since I've set the ssh passwordless authentication already it would be great if the plugin supports connection over ssh

How to reproduce

• Set DOCKER_HOST environment variable with ssh connection details, like export DOCKER_HOST="ssh://user@remotehost"
• Run the maven build

What do you expect

Connection over ssh should have worked for remote docker host

What happened instead

Even if ssh protocol is specified, plugin still tries to connect using tcp, connection fails with timeout, plugin execution fails with connection error

Software:

• docker version: 19.03.13
• docker-maven-plugin version: 1.2.2
• maven version: 3.6.3

Full backtrace

[ERROR] Failed to execute goal com.spotify:docker-maven-plugin:1.2.2:build (build-image) on project docker-remote-project: 

Exception caught: Timeout: GET http://root@xxx.xxx.xxx.xxx:2375/version: com.spotify.docker.client.shaded.javax.ws.rs.ProcessingException: 
com.spotify.docker.client.shaded.org.apache.http.conn.ConnectTimeoutException: Connect to xxx.xxx.xxx.xxx:2375 [/xxx.xxx.xxx.xxx] failed: connect timed out -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal com.spotify:docker-maven-plugin:1.2.2:build (build-image) on project docker-remote-project: Exception caught
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)
    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:957)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
    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: org.apache.maven.plugin.MojoExecutionException: Exception caught
    at com.spotify.docker.AbstractDockerMojo.execute (AbstractDockerMojo.java:151)
    at com.spotify.docker.BuildMojo.execute (BuildMojo.java:329)
    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:957)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
    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.DockerTimeoutException: Timeout: GET http://root@xxx.xxx.xxx.xxx:2375/version
    at com.spotify.docker.client.DefaultDockerClient.propagate (DefaultDockerClient.java:2843)
    at com.spotify.docker.client.DefaultDockerClient.request (DefaultDockerClient.java:2712)
    at com.spotify.docker.client.DefaultDockerClient.version (DefaultDockerClient.java:600)
    at com.spotify.docker.client.DefaultDockerClient.authRegistryHeader (DefaultDockerClient.java:2891)
    at com.spotify.docker.client.DefaultDockerClient.build (DefaultDockerClient.java:1498)
    at com.spotify.docker.client.DefaultDockerClient.build (DefaultDockerClient.java:1465)
    at com.spotify.docker.BuildMojo.buildImage (BuildMojo.java:628)
    at com.spotify.docker.BuildMojo.execute (BuildMojo.java:408)
    at com.spotify.docker.AbstractDockerMojo.execute (AbstractDockerMojo.java:149)
    at com.spotify.docker.BuildMojo.execute (BuildMojo.java:329)
    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:957)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
    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)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[dezren39]

Any chance for this to get enabled? I think you could just add ssh to the list maybe?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.