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Dockerfile中的copy命令使用

更新時間：2025年02月25日 09:33:52 作者：七號7

在使用Dockerfile中的copy命令時,如果使用相對路徑并且文件不在當(dāng)前目錄下,會導(dǎo)致構(gòu)建失敗,需要使用絕對路徑或者將文件移動到Dockerfile所在的目錄下

Dockerfile中的copy命令

在編寫Dockerfile的時候copy宿主機文件到鏡像中，在執(zhí)行構(gòu)建的時候報錯

guoliang@gldeMacBook-Pro docker_file % docker build -f Dockerfile -t jmeter01 .
[+] Building 3.3s (15/16)
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 860B 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/library/java:8 3.1s
=> [auth] library/java:pull token for registry-1.docker.io 0.0s
=> [ 1/11] FROM docker.io/library/java:8@sha256:c1ff613e8ba25833d2e1940da0940c3824f03f802c449f3d1815a66b7f8c0e9d 0.0s
=> [internal] load build context 0.1s
=> => transferring context: 2B 0.1s
=> CACHED [ 2/11] RUN mkdir /jmeterdocker 0.0s
=> CACHED [ 3/11] RUN mkdir -p /jmeterdocker/test 0.0s
=> CACHED [ 4/11] RUN mkdir -p /jmeterdocker/test/input/jmx 0.0s
=> CACHED [ 5/11] RUN mkdir -p /jmeterdocker/test/input/testdata 0.0s
=> CACHED [ 6/11] RUN mkdir -p /jmeterdocker/test/report/html 0.0s
=> CACHED [ 7/11] RUN mkdir -p /jmeterdocker/test/report/jtl 0.0s
=> CACHED [ 8/11] RUN mkdir -p /jmeterdocker/test/report/outputdata 0.0s
=> CACHED [ 9/11] RUN cd /jmeterdocker 0.0s
=> ERROR [10/11] COPY ../apache-jmeter-5.4.1.tgz /jmeterdocker 0.0s
------
> [10/11] COPY ../apache-jmeter-5.4.1.tgz /jmeterdocker:
------
failed to compute cache key: "/apache-jmeter-5.4.1.tgz" not found: not found

看下Dockerfile

FROM java:8

MAINTAINER <qihao@163.com>

ENV http_proxy ""
ENV https_proxy ""

RUN mkdir /jmeterdocker
RUN mkdir -p /jmeterdocker/test
RUN mkdir -p /jmeterdocker/test/input/jmx
RUN mkdir -p /jmeterdocker/test/input/testdata
RUN mkdir -p /jmeterdocker/test/report/html
RUN mkdir -p /jmeterdocker/test/report/jtl
RUN mkdir -p /jmeterdocker/test/report/outputdata
RUN cd /jmeterdocker

ENV JMETER_VERSION=5.4.1
ENV JMETER_HOME=/jmeterdocker/apache-jmeter-${JMETER_VERSION}
ENV JMETER_PATH=${JMETER_HOME}/bin:${PATH}
ENV PATH=${JMETER_HOME}/bin:${PATH}

COPY   ../apache-jmeter-5.4.1.tgz /jmeterdocker

RUN cd /jmeterdocker && tar xvf apache-jmeter-5.4.1.tgz && rm apache-jmeter-5.4.1.tgz

可以看到Copy的文件使用的是相對路徑（把jmetercopy到鏡像的jmeterdocker文件中）

我的jmeter.tgz存放在Docker的上一級目錄中。

命令執(zhí)行后報錯提示找不到

failed to compute cache key: "/apache-jmeter-5.4.1.tgz" not found: not found

后來又嘗試使用絕對路徑更改如下

使用絕對路徑

FROM java:8

MAINTAINER <qihao@163.com>

ENV http_proxy ""
ENV https_proxy ""

RUN mkdir /jmeterdocker
RUN mkdir -p /jmeterdocker/test
RUN mkdir -p /jmeterdocker/test/input/jmx
RUN mkdir -p /jmeterdocker/test/input/testdata
RUN mkdir -p /jmeterdocker/test/report/html
RUN mkdir -p /jmeterdocker/test/report/jtl
RUN mkdir -p /jmeterdocker/test/report/outputdata
RUN cd /jmeterdocker

ENV JMETER_VERSION=5.4.1
ENV JMETER_HOME=/jmeterdocker/apache-jmeter-${JMETER_VERSION}
ENV JMETER_PATH=${JMETER_HOME}/bin:${PATH}
ENV PATH=${JMETER_HOME}/bin:${PATH}

COPY   /Users/guoliang/Documents/Work/apache-jmeter-5.4.1.tgz /jmeterdocker

RUN cd /jmeterdocker && tar xvf apache-jmeter-5.4.1.tgz && rm apache-jmeter-5.4.1.tgz

build之后報錯內(nèi)容

guoliang@gldeMacBook-Pro docker_file % docker build -f Dockerfile -t jmeter001 .
[+] Building 1.2s (14/15)
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 177B 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/library/java:8 1.1s
=> [ 1/11] FROM docker.io/library/java:8@sha256:c1ff613e8ba25833d2e1940da0940c3824f03f802c449f3d1815a66b7f8c0e9d 0.0s
=> [internal] load build context 0.0s
=> => transferring context: 2B 0.0s
=> CACHED [ 2/11] RUN mkdir /jmeterdocker 0.0s
=> CACHED [ 3/11] RUN mkdir -p /jmeterdocker/test 0.0s
=> CACHED [ 4/11] RUN mkdir -p /jmeterdocker/test/input/jmx 0.0s
=> CACHED [ 5/11] RUN mkdir -p /jmeterdocker/test/input/testdata 0.0s
=> CACHED [ 6/11] RUN mkdir -p /jmeterdocker/test/report/html 0.0s
=> CACHED [ 7/11] RUN mkdir -p /jmeterdocker/test/report/jtl 0.0s
=> CACHED [ 8/11] RUN mkdir -p /jmeterdocker/test/report/outputdata 0.0s
=> CACHED [ 9/11] RUN cd /jmeterdocker 0.0s
=> ERROR [10/11] COPY /Users/guoliang/Documents/Work/apache-jmeter-5.4.1.tgz /jmeterdocker 0.0s
------
> [10/11] COPY /Users/guoliang/Documents/Work/apache-jmeter-5.4.1.tgz /jmeterdocker:
------
failed to compute cache key: "/Users/guoliang/Documents/Work/apache-jmeter-5.4.1.tgz" not found: not found