问题是Jenkins不能自己删除所有的图像。有时它会删除所有的图像，有时只删除部分图像，留下悬空的图像。在某些时候，它是随机发生的。
我的设置：

• Jenkins2.346.2
• Docker 2017年10月20日，构建号100c 701
• Ubuntu 20.04.4语言版本

Jenkins文件中的一些代码片段：

pipeline {
    agent any

    options {
        skipStagesAfterUnstable()
        buildDiscarder(logRotator(numToKeepStr: '30'))
        timestamps()
    }

    ...build some jar file...

    stages {
        stage("Build docker images") {
            steps {
                script {
                    echo "Bulding docker images"
                        def buildArgs = """\
                            -f Dockerfile \
                            ."""
                        def image = docker.build(
                            "simple-java-maven-app:latest",
                            buildArgs)
                }
            }
        }
        stage("Push to Dockerhub") {
            steps {
                script {
                    echo "Pushing the image to docker hub"
                    def localImage = "${params.Image_Name}:${params.Image_Tag}"
                    def repositoryName = "generaltao725/${localImage}"
                    sh "docker tag ${localImage} ${repositoryName} "
                    ...push to hub...
                }
            }
        }
    }
    post {
        always {
            script {
                echo 'I will always say Hello again!'
                sh "docker rmi -f generaltao725/simple-java-maven-app simple-java-maven-app"
                sh "docker system prune -f"
                sh "docker images"
            }
        }
    }
}

完整的代码在这里https://github.com/GeneralTao2/simple-java-maven-app/blob/for_sharing/Jenkinsfile
日志片段：

[Pipeline] { (Declarative: Post Actions)
[Pipeline] script
[Pipeline] {
[Pipeline] echo
21:23:40  I will always say Hello again!
[Pipeline] sh
21:23:41  + docker rmi -f generaltao725/simple-java-maven-app simple-java-maven-app
21:23:41  Untagged: generaltao725/simple-java-maven-app:latest
21:23:41  Untagged: simple-java-maven-app:latest
21:23:41  Deleted: sha256:daffc41b3af93166db4c19d8b4414051b3b4518e6ddd257c748ab6706060ca0d
21:23:41  Deleted: sha256:68b669ea8fdc6f95d9b3804098adc846d08e205f01a5766a9ce9c406a82f41d2
21:23:41  Deleted: sha256:1eafd5ac1d9d3f6e3b578ac0faea1cf6bbda85ab1a2106b590e6a67cc2cfa887
21:23:41  Deleted: sha256:a4f900510305bbd11d46c1b09dabbb03864e46e1b3e9fe4839dbd96a917f6958
21:23:41  Deleted: sha256:f0a6ad878e8be605a4753d9b1aa2d076fcdd3040ddc6d220d60d03e27f4a3864
[Pipeline] sh
21:23:41  + docker system prune -f
21:23:41  Total reclaimed space: 0B
[Pipeline] sh
21:23:42  + docker images
21:23:42  REPOSITORY   TAG       IMAGE ID       CREATED        SIZE
21:23:42  openjdk      11        47a932d998b7   2 months ago   654MB
[Pipeline] }
[Pipeline] // script
[Pipeline] }
[Pipeline] // stage
[Pipeline] }

在docker images之后，在管道执行之后，我实际看到的是：

root@470d20ccbca3:/# docker images
REPOSITORY                            TAG       IMAGE ID       CREATED        SIZE
generaltao725/simple-java-maven-app   latest    baa11625ecc8   23 hours ago   674MB
<none>                                <none>    2a8333ccbffb   23 hours ago   674MB

我正在做它几天，没有什么具体的关于它的文件...我将很高兴得到任何帮助！