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I'm very new to a Docker. I want to copy a local directory to a Docker container but I get error

file not found in build context or excluded by .dockerignore: stat ~/.ssh: file does not exist

Here is the line of COPY code,

COPY ~/.ssh /root/.ssh

I can make sure that I have ~/.ssh that it says dose not exist

enter image description here

I need to do this my Application throw error

java.io.FileNotFoundException: /root/.ssh/id_rsa (No such file or directory)

Then I've just realised that I need to copy it into a container.

In my app, I need to use id_rsa and known_hosts to connect to a SFTP server.

Please help. Thanks a lot !

Hikaru Shindo
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2 Answers2

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As I know, you can only use files from the directory where your Dockerfile is.

You cannot ADD or COPY files outside of the path local to the Dockerfile.

The solution is either mount volume with docker run or docker-compose (what you did already), or copy the directory ~/.ssh/ into your Dockerfile directory and then run docker build again.

Let's say we're in /home/saeed/docker/ where your Dockerfile is located, and it has the following contents:

FROM nginx:alpine
COPY .ssh /root/.ssh

Before running docker build, copy the required directory into the build directory:

cp -r ~/.ssh .

Then you can build and run your image as normal.

goldfishalpha
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Saeed
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  • This is the correct answer. Similar to: https://stackoverflow.com/questions/69852628/docker-copy-failed-file-not-found-in-build-context-dockerfile – goldfishalpha Dec 21 '21 at 14:49
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I have not found the reason yet but I found the workaround by mounting the volume in docker-compose instead.

- ~/.ssh:/root/.ssh

But if someone could find the solution to my COPY problem I'm willing to learn it!

ErikMD
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Hikaru Shindo
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