CODEWITHSUNDEEP
docker
AfterWorkGuinness
AfterWorkGuinness

Reputation: 1850

Docker doesn't create directory during build

Experimenting with Docker for the first time. Have these steps in my Dockerfile to create a directory, but when I run the container, the directory isn't there.

FROM ubuntu
MAINTAINER AfterWorkGuinness
RUN apt-get update
RUN apt-get install -y openssh-server
RUN mkdir /root/.ssh
RUN cd /root/.ssh
RUN ssh-keygen -t rsa -N "" -f id_rsa
VOLUME /root
EXPOSE 22

Build image:

docker build -t ubuntu-ssh --no-cache .

Testing the directory when I run the container:

docker run -it -v c:/users/awg/dev/tmp/home:/root ubuntu-ssh

root@39eec8fa51ad:/# cd ~/.ssh
bash: cd: /root/.ssh: No such file or directory

root@39eec8fa51ad:/# cd /root/.ssh
bash: cd: /root/.ssh: No such file or directory

Upvotes: 5

Views: 3608

Answers (1)

Matt
Matt

Reputation: 74680

Use a named volume instead of a bind mount, 

docker run -v tmphome:/root whatever

In a named volume the files will still persist over container restarts but the contents from the directory will be copied to the mounted volume at creation time. Docker chooses where to store the data depending on the driver in use. local is the default and data defaults to the volume directory in the Docker data dir, usually /var/lib/docker/volumes

Upvotes: 2

Related Questions