CODEWITHSUNDEEP
dockerbuilddevops
Jhon Doe
Jhon Doe

Reputation: 45

Docker COPY doesn't work

fellows I need help with Docker!

#DockerfileCron    
FROM node:6

RUN mkdir /www
COPY . /www

WORKDIR /www

RUN apt-get update && apt-get install -y cron

CMD ["cron", "-f"]

When I build an image based on this Dockerfile, the command COPY just copy Dockerfile and ignore all other files in the folder.

# construção das imagens
docker build -t job/job_cronjob - < DockerfileCron

# executa o cron
docker run -d \
        --name job_cronjob job/job_cronjob

How can I fix this?

Upvotes: 4

Views: 1984

Answers (1)

Luk&#225;š Doležal
Luk&#225;š Doležal

Reputation: 289

docker build -t job/job_cronjob - < DockerfileCron

Problem: "This will read a Dockerfile from STDIN without context. Due to the lack of a context, no contents of any local directory will be sent to the Docker daemon. Since there is no context, a Dockerfile ADD only works if it refers to a remote URL." - https://docs.docker.com/engine/reference/commandline/build/#build-with--

Solution: Use -f flag for specifying Dockerfile:

docker build -t job/job_cronjob -f DockerfileCron .

Upvotes: 4

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