What is the right way to add data to an existing named volume in Docker?

Question

I was using Docker in the old way, with a volume container:

docker run -d --name jenkins-data jenkins:tag echo \"data-only container for Jenkins\"
         


        

Answer 1

Here are steps for copying contents of ~/data to docker volume named my-vol

Step 1. Attach the volume to a "temporary" container. For that run in terminal this command :

docker run --rm -it --name alpine --mount type=volume,source=my-vol,target=/data alpine

Step 2. Copy contents of ~/data into my-vol . For that run this commands in new terminal window :

cd ~/data docker cp . alpine:/data

This will copy contents of ~/data into my-vol volume. After copy exit the temporary container.