How to copy file from host to container using Dockerfile

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I have written a Dockerfile which looks like this

FROM ubuntu:12.04

RUN apt-get update
RUN apt-get install -y wget

Now I'm having a file called abc.txt in my host machine. How can I copy it to this container. Is there any step that I can add in Dockerfile which copy from Host to Container.

Use COPY command like this:

COPY foo.txt /data/foo.txt
# where foo.txt is the relative path on host
# and /data/foo.txt is the absolute path in the image

read more details for COPY in the official documentation

An alternative would be to use ADD but this is not the best practise if you dont want to use some advanced features of ADD like decompression of tar.gz files.If you still want to use ADD command, do it like this:

ADD abc.txt /data/abc.txt
# where abc.txt is the relative path on host
# and /data/abc.txt is the absolute path in the image

read more details for ADD in the official documentation

Copying data between Docker containers - Grigorii Chudnov, How do I copy a file from a Docker container? You cannot copy files that are outside the build context when building a docker image. The build context is the path you specify to the docker build command. In the case of the instruction. C:\temp\docker_posh> docker build --rm -f Dockerfile -t docker_posh:latest . The . specifies that the build context is C:\temp\docker_posh.

Why You Should Use COPY Instead of ADD When Building Docker , Let's copy this file into the running container using the container's name from the first command output. $ docker cp index.html eager_curran:/usr/  You can also copy files from a container (an image that has been docker run'd) to the host with docker cp (atually, the cp can copy from the host to the container as well) If you want to get back to your host some files that might have been generated during the build (like for example calling a script that generates ssl ), you can run a

I faced this issue, I was not able to copy zeppelin [1GB] directory into docker container and was getting issue

COPY failed: stat /var/lib/docker/tmp/docker-builder977188321/zeppelin-0.7.2-bin-all: no such file or directory

I am using docker Version: 17.09.0-ce and resolved the issue with the following steps.

Step 1: copy zeppelin directory [which i want to copy into docker package]into directory contain "Dockfile"

Step 2: edit Dockfile and add command [location where we want to copy] ADD ./zeppelin-0.7.2-bin-all /usr/local/

Step 3: go to directory which contain DockFile and run command [alternatives also available] docker build

Step 4: docker image created Successfully with logs

Step 5/9 : ADD ./zeppelin-0.7.2-bin-all /usr/local/ ---> 3691c902d9fe

Step 6/9 : WORKDIR $ZEPPELIN_HOME ---> 3adacfb024d8 .... Successfully built b67b9ea09f02

Dockerfile COPY Instruction​​ # Copy the application files into the image. Build and run: $ docker build -t myapp . The COPY instruction recursively copies files and directories from the host into an image, which means that sensitive files may also be copied in. Here, we will create a Dockerfile to create an image to install the Apache Web Server container. To do this, we will need to create a file named Dockerfile using any text editor: sudo nano Dockerfile. Add the following content which includes the commands and arguments for the Apache Web Server Container.

you can use either the ADD command https://docs.docker.com/engine/reference/builder/#/add or the COPY command https://docs.docker.com/engine/reference/builder/#/copy

In this article, we will show you how to use docker cp to copy files or folders from a docker container to the host (local file system) or the  The Dockerfile is a text file that contains the instructions needed to create a new container image. These instructions include identification of an existing image to be used as a base, commands to be run during the image creation process, and a command that will run when new instances of the container image are deployed.

if you do a copy (cp command) of that file on the host system, does it I am using cat, and yes, if I copy the file from the container back to the  Docker cp command is a handy utility that allows to copy files and folders between a container and the host system. If you want to copy files from your host system to the container, you should use docker cp command like this: If you want to copy files from the container to the host system, use this command: That may look a bit intimidating so

Copy files/folders between a container and the local filesystem For example, files copied to a container are created with UID:GID of the root user. Files copied​  COPY and ADD are both Dockerfile instructions that serve similar purposes. They let you copy files from a specific location into a Docker image. COPY takes in a src and destination. It only lets you copy in a local file or directory from your host (the machine building the Docker image) into the Docker image itself.

Sometimes you see COPY or ADD being used in a Dockerfile, but 99% of the time you should be using COPY, here's why. It only lets you copy in a local file or directory from your host (the machine building the Docker  Dockerfile is a simple text file which contains configuration for the Docker Image which will be created. Dockerfile contains Dockerfile Commands to change properties of image. We can also call a Dockerfile as a recepie for image. Here is a simple and lean Dockerfile. This file simple derive Base Image from current and latest Ubuntu Docker

Comments
  • by the way, wget is already included in Ubuntu 12.04, if memory serves me
  • Your update and install should probably be placed on one line, see docs.docker.com/articles/dockerfile_best-practices/#run
  • do you want the file in a docker image or just in a docker container?
  • Is there a possibility of doing this using the absolute path of the host machine?
  • Unfortunately no, you can only add files from the folder of your Dockerfile or subfolders of it. Also, soft links will not work either. This is due to the docker build process. Building starts by compressing the directory where Dockerfile resides to an archive and uses this archive to retrieve files used in ADD/COPY commands.
  • thanks, I wrote a shell script to automate that part. It would have been better if I could handle that through Dockerfile.
  • Adding to this -- if you move a Dockerfile in pycharm, it can alter the context automatically.
  • The important step here is the fact the file must be in the same folder as the Dockerfile
  • @bormat you got it, thanks for the comment!