Docker COPY没有这样的文件或目录

时间：2019-08-22 12:03:26

标签： docker directory echo pwd

在复制任务上构建docker镜像失败。无此文件或目录。我正在使用世界example from spring

从openjdk：8-jdk-alpine构建

Run echo ${PWD}打印/ Run ls打印一组普通目录（/ usr / var等），但不存在项目文件

为什么docker不使用WORKING目录？

FROM openjdk:8-jdk-alpine
VOLUME /tmp
ARG DEPENDENCY=target/dependency
COPY ${DEPENDENCY}/BOOT-INF/lib /app/lib
COPY ${DEPENDENCY}/META-INF /app/META-INF
COPY ${DEPENDENCY}/BOOT-INF/classes /app
ENTRYPOINT ["java","-cp","app:app/lib/*","hello.Application"]

要复制的文件是通过gradle准备的，我可以确认它们存在：

task unpack(type: Copy) {
    dependsOn bootJar
    from(zipTree(tasks.bootJar.outputs.files.singleFile))
    into("build/dependency")
}

我在跑步

docker build .

docker gradle任务

docker {
    name "${project.group}/${bootJar.baseName}"
    copySpec.from(tasks.unpack.outputs).into("dependency")
    buildArgs(['DEPENDENCY': "dependency"])
}

4 个答案:

答案 0 :(得分：2)

问题

docker build -t springio/gs-spring-boot-docker .
Sending build context to Docker daemon  16.78MB
Step 1/8 : FROM openjdk:8-jdk-alpine
 ---> a3562aa0b991
Step 2/8 : RUN addgroup -S spring && adduser -S spring -G spring
 ---> Using cache
 ---> 5b122a1db135
Step 3/8 : USER spring:spring
 ---> Using cache
 ---> 3bdba2028e42
Step 4/8 : ARG DEPENDENCY=target/dependency
 ---> Using cache
 ---> 616945cc41ed
Step 5/8 : COPY ${DEPENDENCY}/BOOT-INF/lib /app/lib
COPY failed: file not found in build context or excluded by .dockerignore: stat target/dependency/BOOT-INF/lib: file does not exist

修复

mkdir -p target/dependency && (cd target/dependency; jar -xf ../*.jar)

将创建以下文件夹布局。 这样做是为了解释 docker 映像的分层选项。这一切都在 Example 3. Dockerfile

中进行了解释 
   $pwd
   /java-training/workspace/gs-spring-boot-docker/complete
   $tree -L 3 target/dependency
    target/dependency
    ├── BOOT-INF
    │   ├── classes
    │   │   ├── application.yml
    │   │   └── hello
    │   ├── classpath.idx
    │   └── lib
    │       ├── jackson-annotations-2.11.0.jar
    │       ├── jackson-core-2.11.0.jar
    │       ├── jackson-databind-2.11.0.jar
    │       ├── jackson-datatype-jdk8-2.11.0.jar
    │       ├── jackson-datatype-jsr310-2.11.0.jar
    │       ├── jackson-module-parameter-names-2.11.0.jar
    │       ├── jakarta.annotation-api-1.3.5.jar
    │       ├── jakarta.el-3.0.3.jar
    │       ├── jul-to-slf4j-1.7.30.jar
    │       ├── log4j-api-2.13.2.jar
    │       ├── log4j-to-slf4j-2.13.2.jar
    │       ├── logback-classic-1.2.3.jar
    │       ├── logback-core-1.2.3.jar
    │       ├── slf4j-api-1.7.30.jar
    │       ├── snakeyaml-1.26.jar
    │       ├── spring-aop-5.2.6.RELEASE.jar
    │       ├── spring-beans-5.2.6.RELEASE.jar
    │       ├── spring-boot-2.3.0.RELEASE.jar
    │       ├── spring-boot-autoconfigure-2.3.0.RELEASE.jar
    │       ├── spring-boot-starter-2.3.0.RELEASE.jar
    │       ├── spring-boot-starter-json-2.3.0.RELEASE.jar
    │       ├── spring-boot-starter-logging-2.3.0.RELEASE.jar
    │       ├── spring-boot-starter-tomcat-2.3.0.RELEASE.jar
    │       ├── spring-boot-starter-web-2.3.0.RELEASE.jar
    │       ├── spring-context-5.2.6.RELEASE.jar
    │       ├── spring-core-5.2.6.RELEASE.jar
    │       ├── spring-expression-5.2.6.RELEASE.jar
    │       ├── spring-jcl-5.2.6.RELEASE.jar
    │       ├── spring-web-5.2.6.RELEASE.jar
    │       ├── spring-webmvc-5.2.6.RELEASE.jar
    │       ├── tomcat-embed-core-9.0.35.jar
    │       └── tomcat-embed-websocket-9.0.35.jar
    ├── META-INF
    │   ├── MANIFEST.MF
    │   └── maven
    │       └── org.springframework
    └── org
        └── springframework
            └── boot

现在您可以构建它了！

 docker build -t springio/gs-spring-boot-docker .
Sending build context to Docker daemon  33.44MB
Step 1/8 : FROM openjdk:8-jdk-alpine
 ---> a3562aa0b991
Step 2/8 : RUN addgroup -S spring && adduser -S spring -G spring
 ---> Using cache
 ---> 5b122a1db135
Step 3/8 : USER spring:spring
 ---> Using cache
 ---> 3bdba2028e42
Step 4/8 : ARG DEPENDENCY=target/dependency
 ---> Using cache
 ---> 616945cc41ed
Step 5/8 : COPY ${DEPENDENCY}/BOOT-INF/lib /app/lib
 ---> Using cache
 ---> 1d1404d8b0e7
Step 6/8 : COPY ${DEPENDENCY}/META-INF /app/META-INF
 ---> Using cache
 ---> ad8c03fa8c4e
Step 7/8 : COPY ${DEPENDENCY}/BOOT-INF/classes /app
 ---> Using cache
 ---> 2aaadf41ccd2
Step 8/8 : ENTRYPOINT ["java","-cp","app:app/lib/*","hello.Application"]
 ---> Using cache
 ---> a21e7f0c88fc
Successfully built a21e7f0c88fc
Successfully tagged springio/gs-spring-boot-docker:latest

祝你好运！

答案 1 :(得分：1)

您收到“没有这样的文件或目录”错误，看来这是事实。

Dockerfile设置：

ARG DEPENDENCY=target/dependency

然后尝试进行COPY操作：

COPY ${DEPENDENCY}/BOOT-INF/lib /app/lib

如果您解析${DEPENDENCY}，则COPY命令如下所示：

COPY target/dependency/BOOT-INF/lib /app/lib

存储库中没有target目录。也许这是您应该按照本教程创建的内容？从该文档中：

  

此Dockerfile具有一个DEPENDENCY参数，该参数指向我们解开胖子jar的目录。如果我们做对了，它已经包含一个包含依赖项jar的BOOT-INF / lib目录，以及一个其中包含应用程序类的BOOT-INF / classes目录。请注意，我们正在使用应用程序自己的主类hello.Application（这比使用胖子启动器提供的间接调用要快）。

答案 2 :(得分：0)

在您的项目中运行

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答案 3 :(得分：0)

我遇到了同样的问题。解决这个问题：

  1. 在执行之前
<块引用>

docker 构建

命令，只需在项目的根目录（Dockerfile 和目标存在的地方）运行此命令：

mkdir target/dependency
(cd target/dependency; jar -xf ../*.jar)

或者， 2. 只需在 .gitlab-ci.yml 文件中添加这两个命令（如果使用 gitlab CI/CD 管道）：

docker-build:
  stage: package
  tags:
    - vasci2_shell_runner
  script:
    - mkdir target/dependency
    - (cd target/dependency; jar -xf ../*.jar)
    - docker build -t nexus.css.ir:30005/vas/harim/apc:lastest .
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