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Docker: COPY failed: file not found in build context or excluded by .dockerignore

I have a docker compose file which sets up a service with a GitHub URL for the context. The service’s Dockerfile copies a requirements.txt and installs it. That works OK (COPY requirements.txt /rasa_traind/). But when I change that line to COPY . <dir> I get a COPY failed: file not found in build context error.

Docker Compose

  chatbot_server:
    build:
      context: <GitHub URL>
      dockerfile: Dockerfile
    ports:
      - "5005:5005"
    depends_on:
      - rasa_actions_server
      - redis
    extra_hosts:
      - "host.docker.internal:host-gateway" # for docker.host.internal to work on Linux

docker-compose build

Step 4/8 : RUN pip install --upgrade pip
 ---> Using cache
 ---> 5a584d36ea77
Step 5/8 : COPY . /rasa_traind/
ERROR: Service 'chatbot_server' failed to build: COPY failed: file not found in build context or excluded by .dockerignore: stat rasa_traind/: file does not exist

Dockerfile

FROM python:3.8.12-slim-buster

RUN apt-get update

RUN yes | apt-get install python3-dev build-essential

RUN pip install --upgrade pip

# COPY requirements.txt /rasa_traind/ # Works
COPY . /rasa_traind/

RUN pip install -r requirements.txt

WORKDIR /rasa_traind/rasa_actions_server/

CMD ["rasa", "run"]

@mgvazquez , according to docker build | Docker Documentation, a URL is supported in the context.

In any case, I was able to resolve this by adding a WORKDIR right before the copy. That doesn’t seem to be needed when the context is not a URL.

1 Like

Hi @ jcald1,

Yes, right after posting my answer, I realized that my answer was nonsense and deleted it to avoid confusion.