The volume parameter specifies the volume to mount and the location, /etc/todos. docker run -dp 3000:3000 -v todo-db:/etc/todos getting-started Start the getting-started container by using the following command. To stop the container from the command line, use the docker stop command. Under CONTAINERS, select getting-start and right-click. Refer to the name of the volume, and Docker provides the right data.Ĭreate a volume by using the docker volume create command. The container writes to the todo.db file and that data persists to the host in the volume.ĭocker maintains the physical location the volume on the disk. When you make it available to the next container, the application can pick up where it left off.īy creating a volume and attaching, or mounting, it to the folder that the data is stored in, you can persist the data. You can persist the single file on the host.

SQLite Database is a relational database that stores data a single file. Persist your todo data using named volumesīy default, the todo app stores its data in a SQLite Database at /etc/todos/todo.db. Right-click and select Remove.įrom the command line, you can remove them by using the docker rm -f command. There should be no data.txt file there because it was written to the scratch space for only the first container. Use this command to look at the folder contents. docker run -d ubuntu bash -c 'shuf -i 1-10000 -n 1 -o /data.txt & tail -f /dev/null' To use the command line to see this result, get the container ID by using the docker ps command, and run the following command. Run the following command to see the contents of the /data.txt file. In VS Code, in the Docker area, right-click the ubuntu container and select Attach Shell.Ī terminal opens that is running a shell in the Ubuntu container. The second command is watching a file to keep the container running.

The first portion picks a single random number and writes it to /data.txt. This command starts invokes two commands by using &. Start a ubuntu container by using this command: docker run -d ubuntu bash -c 'shuf -i 1-10000 -n 1 -o /data.txt & tail -f /dev/null' The files created in one container aren't available in another. In this section, you'll start two containers and create a file in each. Start with that one, which includes prerequisites. This tutorial continues the previous tutorial, Create and share a Docker app with Visual Studio Code.

Docker inspect layer size