Can't create a docker image for COPY failed: stat /var/lib/docker/tmp/docker-builder error

问题

I want to create a docker image. This is my work directory: Dockerfile.in test.json test.py

And this is my Dockerfile:

COPY ./test.json /home/test.json
COPY ./test.py /home/test.py

RUN python test.py

When i launch this command: docker build -f Dockerfile.in -t 637268723/test:1.0 .

It gives me this error:

`Step 1/5 : COPY ./test.json /home/test.json
 ---> Using cache
 ---> 6774cd225d60
 Step 2/5 : COPY ./test.py /home/test.py
 COPY failed: stat /var/lib/docker/tmp/docker-builder428014112/test.py: 
 no such file or directory`

Can anyone help me?

回答1:

You should put those files into the same directory with Dockerfile.

回答2:

Check if there's a .dockerignore file, if so, add:

!mydir/test.json
!mydir/test.py

回答3:

Removing ./ from source path should resolve your issue:

 COPY test.json /home/test.json
 COPY test.py /home/test.py

回答4:

Q1: Check your .dockerignore file in build path, the files or dir you want to copy may be in the ignore file list!
Q2: The COPY directive is based on the context in which you are building the image, so be aware of any problems with the directory where you are currently building the image! See: https://docs.docker.com/engine/reference/builder/#copy

回答5:

I was also facing the same, I moved my docker file to root of the project. then it worked

回答6:

This may help someone else facing similar issue.

Instead of putting the file floating in the same directory as the Dockerfile, create a dir and place the file to copy and then try.

COPY mydir/test.json /home/test.json
COPY mydir/test.json /home/test.json

回答7:

In your case removing ./ should solve the issue. I had another case wherein I was using a directory from the parent directory and docker can only access files present below the directory where Dockerfile is present so if I have a directory structure /root/dir and Dockerfile /root/dir/Dockerfile

I cannot copy do the following

COPY root/src /opt/src

回答8:

When using the Docker compose files, publish, publishes to obj/Docker/Publish. When I copied my files there and pointed my Dockerfile to this directory (as generated), it works…

回答9:

Another potential cause is that docker will not follow symbolic links by default (i.e don't use ln -s).

回答10:

The following structure in docker-compose.yaml will allow you to have the Dockerfile in a subfolder from the root:

version: '3'
services:
  db:
    image: postgres:11
    environment:
      - PGDATA=/var/lib/postgresql/data/pgdata
    volumes:
      - postgres-data:/var/lib/postgresql/data
    ports:
      - 127.0.0.1:5432:5432
  **web:
    build: 
      context: ".."
      dockerfile: dockerfiles/Dockerfile**
    command: ...
...

Then, in your Dockerfile, which is in the same directory as docker-compose.yaml, you can do the following:

ENV APP_HOME /home

RUN mkdir -p ${APP_HOME}

# Copy the file to the directory in the container
COPY test.json ${APP_HOME}/test.json
COPY test.py ${APP_HOME}/test.py

# Browse to that directory created above
WORKDIR ${APP_HOME}

You can then run docker-compose from the parent directory like:

docker-compose -f .\dockerfiles\docker-compose.yaml build --no-cache

回答11:

The way docker look for file is from the current directory i.e. if your command is

COPY target/xyz.jar app.jar

ADD target/xyz.jar app.jar

The xyz jar should be in the current/target directory - here current is the place where you have your docker file. So if you have docker in a different dir. its better bring to main project directory and have a straight path to the jar being added or copied to the image.

回答12:

In my case, it was the comment line that was messing up the COPY command

I removed the comment after the COPY command and placed it to a dedicated line above the command. Surprisingly it resolved the issue.

Faulty Dockerfile command

COPY qt-downloader .     # https://github.com/engnr/qt-downloader -> contains the script to auto download qt for different architectures and versions

Working Dockerfile command

# https://github.com/engnr/qt-downloader -> contains the script to auto download qt for different architectures and versions
COPY qt-downloader .

Hope it helps someone.

回答13:

Here is the reason why it happens, i.e. your local directory in the host OS where you are running the docker should have the file, otherwise you get this error

One solution is to : use RUN cp <src> <dst> instead of COPY <src> <dst>

then run the command it works!

回答14:

 <plugin>
    <groupId>io.fabric8</groupId>

    <artifactId>docker-maven-plugin</artifactId>
    <configuration>
      <images>
        <image>
          <name>imagenam</name>
          <alias>dockerfile</alias>
          <build>
            <!-- filter>@</filter-->
            <dockerFileDir>dockerfile loaction</dockerFileDir>
            <tags>
            <tag>latest</tag>
            <tag>0.0.1</tag>
            </tags>
          </build>
          <run>
            <ports>
              <port>8080:8080</port>
            </ports>
          </run>
        </image>
      </images>
    </configuration>
  </plugin>

来源：https://stackoverflow.com/questions/46907584/cant-create-a-docker-image-for-copy-failed-stat-var-lib-docker-tmp-docker-bui

标签

python

Docker

dockerfile

docker-image