Docker data volume common operation code examples

If the developer uses Dockerfile to build the image, they can also declare the data volume when building the image, for example:

FROM nginx
ADD https://www.baidu.com/img/bd_logo1.png /usr/share/nginx/html/
RUN echo "hello docker volume!">/usr/share/nginx/html/index.html
VOLUME /usr/share/nginx/html/

In this way, an anonymous data volume is configured. During operation, data is written to the /usr/share/nginx/html/ directory, which can achieve stateless changes in the container storage layer. View all data volumes

Use the following command to view all data volumes:

docker volume ls

As shown in the figure:

View data volume details

You can view data details according to the volume name, as follows:

docker volume inspect

The execution result is as follows:

Deleting a Data Volume

You can use the docker volume rm command to delete a data volume, or you can use docker volume prune to delete data volumes in batches, as follows:

During batch deletion, all data volumes were not deleted, and one was left. This is because the data volume is still in use. Stop and remove the related containers, and then delete the data volume again to successfully delete it, as shown in the figure:

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