任务'；的执行失败：网站：buildDockerImage'；。使用apachebeam的gradlew构建

我需要使用gradle构建apachebeam<代码>/gradlew构建。但是，我得到了以下错误： 任务的执行失败：网站：buildDockerImage'>启动进程“命令”docker“”时出现问题。

java版本：openjdk版本“1.8.0_265” 渐变版本：渐变5.4 通过使用

--info

，我得到了以下结果：

Caching disabled for task ':website:buildDockerImage' because:
  Caching has not been enabled for the task
Task ':website:buildDockerImage' is not up-to-date because:
  Task has not declared any outputs despite executing actions.
Starting process 'command 'docker''. Working directory: /home/namenode/beam/website Command: docker build -t beam-website .
:website:buildDockerImage (Thread[Daemon worker Thread 20,5,main]) completed. Took 0.018 secs.
Closing Git repo: /home/namenode/beam/.git
Closing Git repo: /home/namenode/beam/.git

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':website:buildDockerImage'.
> A problem occurred starting process 'command 'docker''

while--stacktrace输出：

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':website:buildDockerImage'.
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.lambda$executeIfValid$1(ExecuteActionsTaskExecuter.java:200)
        at org.gradle.internal.Try$Failure.ifSuccessfulOrElse(Try.java:263)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeIfValid(ExecuteActionsTaskExecuter.java:198)
        at org.gradle.process.internal.ExecHandleRunner.startProcess(ExecHandleRunner.java:98)
        at org.gradle.process.internal.ExecHandleRunner.run(ExecHandleRunner.java:71)
        ...  more
Caused by: java.io.IOException: Cannot run program "docker" (in directory "/home/namenode/beam/website"): error=2, No such file or directory
        at net.rubygrapefruit.platform.internal.DefaultProcessLauncher.start(DefaultProcessLauncher.java:25)
        ... 7 more
Caused by: java.io.IOException: error=2, No such file or directory
        ... 8 more

BUILD FAILED in 1s
1 actionable task: 1 executed
[root@namenode beam]# ./gradlew build
Watching the file system is not supported on this operating system.
Configuration on demand is an incubating feature.
> Task :website:buildDockerImage FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':website:buildDockerImage'.
> A problem occurred starting process 'command 'docker''

---

如何继续？

问题已编辑。谢谢！关于

--stacktrace

？by:java.io.IOException:无法运行程序“docker”（在目录“/home/namenode/beam/website”）：error=2，net.rubygrapefuit.platform.internal.DefaultProcessLauncher.start（DefaultProcessLauncher.java:25）没有这样的文件或目录。。。7更多原因：java.io.IOException:error=2，没有这样的文件或目录。。。还有一个问题，你的机器上是否安装了Docker？