Changing Data In Volumes using Dockerfile

Tested Infrastructure

Pre-requisite

• Create an account with DockerHub
• Open PWD Platform on your browser
• Click on "Add New Node"

Getting Started

• Pull down alpine docker image

• Add content to volume in Dockerfile

• Verify the content by running the container

Create a Dockerfile and add data to volume

Pull a lightweight alpine distribution image.

docker pull alpine

Create a Dockerfile with alpine image as base and write data into myvol

FROM alpine
RUN mkdir /myvol
RUN echo 'Hello! Welcome to Docker Community' >> /myvol/greeting
VOLUME /myvol

Build the Docker Image:

docker build -t volume_image .

Verify the data by starting the container and displaying the content of the file

$ docker run -it volume_image cat /myvol/greeting
Hello! Welcome to Docker Community

Clean up artifacts.

docker rm -f $(docker ps -aq) .
docker rmi $(docker images -q)
docker volume rm $(docker volume ls -q)