Docker windows volumes location

Docker Desktop makes it simple to run Docker on your computer. One common task is to find where your data volumes are stored. Data volumes help keep your files safe even if a container is removed. In this guide, we will learn how to locate these data volumes in Docker Desktop. I use simple words and short sentences so it is easy to follow.

Introduction

Docker volumes store your data outside of the container. They let you keep information safe between container restarts. When you work with Docker Desktop, you may wonder where these volumes live. Unlike files on your normal computer, volumes are hidden inside Docker’s internal storage. This article shows you several ways to find them.

Understanding how Docker volumes work is very helpful. You can read more about this in our article on what are docker volumes and how do they work? This gives you a good background.

Docker Desktop and Its Storage

Docker Desktop runs Docker in a special virtual machine. On Windows and macOS, this virtual machine hides many file system details. Data volumes are kept inside this VM and are not directly visible in your normal file explorer.

Because of this, the easiest way to locate volumes is by using Docker commands. The Docker CLI lets you list, inspect, and manage volumes. If you want a more complete guide on creating and using volumes, see how to create and use docker volumes.

Listing Your Data Volumes

The first step is to list all your volumes using the Docker CLI. Open a terminal and run:

docker volume ls

This command prints a list of volumes with their names. Each volume has a unique name, which you can use later to inspect it in more detail.

For example, you might see output like this:

DRIVER    VOLUME NAME
local     pgdata
local     myapp_volume

This shows that there are volumes named pgdata and myapp_volume. To learn more about each volume, you can inspect them.

Inspecting a Specific Volume

Once you have a volume name, use the following command to get details:

docker volume inspect <volume_name>

Replace <volume_name> with the name from your list. For example:

docker volume inspect pgdata

This command returns a JSON object with information about the volume. It shows the driver, the mount point inside the Docker VM, and other details.

By reading the output, you can see the location where Docker Desktop stores the volume data. The mount point is a path on the VM’s internal file system. Although you cannot easily browse this path from your host machine, you now know where the data lives inside Docker.

For more on listing and inspecting volumes, check out our guide on how to list and inspect docker volumes.

Accessing Volume Data

In many cases, you do not need to access the data files directly. Instead, you can use containers to work with your data. However, if you need to open a shell inside a container and check the files, you can run a temporary container that mounts the volume.

For example, to open a shell and explore a volume named myapp_volume, run:

docker run --rm -it -v myapp_volume:/data alpine sh

This command does the following:

• —rm removes the container when you exit.
• -it opens an interactive terminal.
• -v myapp_volume:/data mounts the volume to the container’s /data folder.
• alpine sh starts a simple Alpine Linux shell.

Once inside, you can list files in the /data folder to see your volume’s contents. When you are done, type exit to leave the shell.

For advanced users who wish to mount directories from the host to containers, you may also find the article on how to mount host directories to docker containers useful. It explains the difference between volumes and bind mounts.

Using Docker Desktop UI

Docker Desktop also provides a graphical user interface (GUI) to manage containers and images. While the GUI does not show volume file paths directly, it can help you see which volumes are in use.

1. Open Docker Desktop.
2. Go to the Volumes tab in the Dashboard.
3. Here, you can see a list of volumes. Click on one to view its details.

This method is useful if you prefer to use a point-and-click approach rather than the command line. It also gives you a quick overview of all storage used by Docker.

If you are not sure how to use Docker Desktop, check out our article on what is Docker Desktop and how do you use it? for a basic introduction.

Where Are Volumes Stored on Your Host?

Because Docker Desktop runs inside a VM, the actual files are stored in a hidden area. On macOS, the files are usually in a virtual disk image managed by Docker. On Windows, they are inside a Hyper-V or WSL 2 distribution.

For most users, it is best not to change these settings manually. Instead, work with volumes using Docker commands or the Docker Desktop UI. The system handles the details for you. Knowing that the data is safe inside the VM is usually enough.

Why Locating Volumes Matters

There are several reasons why you might need to locate your Docker volumes:

• Troubleshooting: If you have problems with a container, inspecting the volume can help diagnose the issue.
• Backups: You may want to back up important data stored in a volume.
• Data Migration: When moving data from one system to another, knowing the volume details is helpful.

Understanding where your data lives and how it is managed is a key part of using Docker well. For more insight into docker volumes, you might also review our guide on what are docker volumes and how do they work?

Best Practices

Here are some best practices for working with Docker volumes in Docker Desktop:

• Use Named Volumes:

  Always use named volumes instead of anonymous ones. This makes it easier to track and manage your data.

• Regularly Inspect Volumes:

  Use docker volume ls and docker volume inspect to monitor your volumes. This helps you understand their size and usage.

• Backup Important Data:

  Create regular backups of critical volumes. Even if the files are hidden inside the VM, you can export the data using a temporary container.

• Use the Docker Desktop UI:

  The Dashboard gives a quick view of your volumes. It is a helpful tool for new users who are not comfortable with the CLI.

For more details on how to work with volumes and keep your data safe, you may refer to our article on how to create and use docker volumes.

Conclusion

Locating data volumes in Docker Desktop is a key skill for anyone working with Docker. By using simple commands like docker volume ls and docker volume inspect, you can easily list and find your volumes. The Docker Desktop UI also offers a simple way to view volume information. Although the actual files are stored inside a hidden VM, you can work with them safely using Docker commands.

To learn more about Docker storage, check out our guides on:

• what are docker volumes and how do they work?
• how to create and use docker volumes
• how to list and inspect docker volumes
• what is Docker Desktop and how do you use it?
• how to mount host directories to docker containers

By following these simple steps and best practices, you can confidently manage your Docker volumes. Keep practicing, and over time these tasks will become second nature. Happy containerizing and good luck with your Docker projects!

C:\Users\[Your User Name]\AppData\Local\Docker\wsl\data-ext4.vhdx

%APPDATA%\Docker\wsl\data-ext4.vhdx

<docker installation path>/volumes/<volume name>

cd /mnt/wsl/docker-desktop-data/version-pack-data/community/docker/volumes

wsl --set-version Ubuntu-20.04 2

docker run -d -p 80:80 docker/getting-started

docker volume create my-vol
echo '
<my> "html file content here." </my>
' > /mnt/c/Users/hello.html
docker run -d --name devtest -v my-vol:/app nginx:latest

\\wsl$\docker-desktop-data\version-pack-data\community\docker\volumes

docker volume create my_volume

docker volume rm my_volume

docker run -v my_volume:/path/in/container -it Ubuntu bash

docker run -v /c/Users/username/Documents/my_directory:/path/in/container -it Ubuntu bash

With extensive digging, you’ll see that Docker volumes’ real location is somewhere deep in Windows’ system folders, along these lines:

C:\Users\YourUserName\AppData\Local\Docker\wsl\data\ext4.vhdx

. But without specific drag-and-drop capability between the Windows host system and the Docker guest environment or capacity for translating the VHDX filesystem, accessing this directly isn’t recommended or even practical.

Such an indirect location has functional benefits. It protects your system integrity and security, ensuring buffered interactions between your containers and the raw power of your base OS.

If you need to probe more, consider mounting your desired Windows directories into the Docker containers. This strategy allows guests (containers) to read/write, creating a convenient interaction channel without jeopardizing safety, and also making managing volumes directly a lot easier.

To mount, use a command like:

docker run -v c:/Users/path-to-directory-on-windows:/app imageName

This instructs Docker to map a local filesystem mount to a path in the container (/app). Any changes made to this destination will be written back to the source directory.

Understanding how Docker handles volumes and where it actually locates them (in the context of WSL on Docker Desktop) helps us harmoniously manage both host and virtualized environments, improving all-around robustness and maintainability.When working in a WSL environment using Docker Desktop, the navigation of Docker volume locations can seem confusing. But once you get your bearings right, it becomes quite smooth and intuitive.

All the significant directories, such as volumes, are stored under a default docker-desktop-data VM instance on WSL controlled by Docker Desktop. The data is primarily located in `/var/lib/docker/`, but it’s not accessible from the WSL Linux distros directly due to the design intention to encapsulate the data and prevent accidental modification.

To navigate the Docker volumes:

Step 1: Access Docker Desktop Data Instance

Open a new WSL terminal and switch to the Docker Desktop Data instance with this command:

wsl -d docker-desktop-data 

Step 2: Navigate to the Docker Directory

Once you are in the Docker Desktop instance, go to the Docker directory:

This specific location allows us to explore all sorts of Docker configurations, including volumes.

Step 3: Open Volumes Directory

Navigate to the volumes directory:

Within this directory, each folder correlates to a different Docker volume that exists within your system, named after the unique identifier that Docker assigns to each volume upon creation.

Important Note:

In case you have made configuration modifications for Docker-Desktop, like setting custom paths or changing the location for the Docker Desktop resources, the path will mirror these changes. More information on how the directory structure looks inside `/var/lib/docker` can be found on Docker’s official documentation.

A Word on Container Storage:

It’s also key to remember when using Docker with WSL that containers and images are stored separately under Docker virtual machines (docker-desktop and docker-desktop-data) rather than the specific WSL distribution.

Cyberdrk in their GitHub post, “Running Docker on WSL”, provides an excellent overview of where Docker stores container image files when running inside a WSL environment.

With a good understanding of these locations, you can maximise your productivity and efficiency when dealing with Docker volumes in a WSL environment!One of the main pillars of Docker technology is building amicable ecosystems for developers by taking two fundamental insights – volumes, which store data generated by and used by docker containers and images, which are lightweight and standalone executable packages. In Docker, these fundamentally contribute to containerization utility.

With Windows Subsystem for Linux (WSL) operating within Docker Desktop, here’s how they interplay:

Docker Images And Containers:

Docker employs a Union File System that allows layers of files to overlay. For instance,

This docker image has multiple read-only layers and each directive creates a new layer.

The real magic happens when you initialize the Docker container from an image. It adds a thin, modifiable layer atop the Image’s read-only layers which makes the containers incredibly lightweight.

Docker Volumes and Docker Containers:

When you create a Docker container, any data that the container generates will vanish when the container is deleted unless you use Docker volumes. These are preferred mechanisms that persist data generated and used by Docker containers.

So essentially, Docker volumes can be shared among multiple containers and their content exists as long as the volume exists.

To illustrate this, we can run a basic alpine based Docker container with a volume named ‘vol’.

docker run -it --name=alpine-test -v vol:/root/data alpine sh

Now, any data inside ‘/root/data’ in the container will remain even if the container is deleted, thanks to ‘vol’. This makes Docker volumes critical for data persistence.

Understanding Docker Device Mapper in WSL:

In a Docker on Linux setup, the Docker daemon directly interacts with the system. However, when using Docker Desktop on Windows, it uses a virtual machine (Hyper-V or WSL2 based) to build and run Docker containers, meaning Docker isn’t interfacing directly with Windows File System but rather through a Linux VM.

When operating within WSL using Docker Desktop, the space that Docker reserves for images, containers, volumes etc., is managed by Docker’s device mapper storage driver.

As shown above, the device mapper divides the physical storage into multiple logical blocks called ‘Data Blocks’. Each block corresponds to a single layer of a Docker image or container. Volume data gets propagated over these blocks as well.

This ‘Data-Block Pool’, where your Docker bits reside in, can be controlled using the preferences of Docker Desktop.

Locating Docker Volumes in WSL:

However, finding whether your ‘Data Block Pool’ lies isn’t really straightforward in Windows. If you’re using the new WSL2 backend (available in Docker Desktop 2.x), your volumes are stored in the distro’s ext4 vhd file at:

\\wsl$\«distro»\var\lib\docker\volumes

Where «distro» would be your running distro like ‘Ubuntu-20.04’.

The ‘\\wsl$\’ approach allows accessing your WSL Linux files in Windows explorer which makes management easier.

Ultimately, understanding the interlink between volumes, containers, and images and where they are located in Docker, particularly when using WSL, is essential to make the most out of Docker’s powerful containerization utility.When running WSL (Windows Subsystem for Linux) with Docker Desktop, the concept of data persistence is definitely something worth understanding to ensure that your applications and services continue to function as expected even after you close, reopen, or modify containers—or even reboot your system completely. One way this data persistence is achieved in Docker is by using “volumes”, which can be shared and reused among different containers.

So, where are these Docker volumes located when we run Docker on a WSL environment? They actually reside within the virtualized hard disk controlled by Docker Desktop. This location isn’t typically designated within the WSL filesystem but rather inside Docker’s own managed area.

This path ‘/var/lib/docker/volumes/’ is where the majority of Docker volumes can be found when running Docker Desktop on a WSL environment. Each directory in this path corresponds to a particular volume mounted by a container. Although it appears to be a standard Unix filesystem path, remember that behind the scenes, the WSL and Docker Desktop are managing this area themselves, so consider it a specialized environment.

For retrieval and interaction with the data of Docker volumes on a larger scale, Docker’s CLI (Command Line Interface) provides commands such as

To list all currently registered Docker volumes

And

docker volume inspect [volume_name]

This command gives detailed information about a specific volume including its location.

While working with Docker Desktop and WSL, throughout time, you’d possibly gain large volumes containing varying types of application-related data. It becomes necessary then to manage and monitor these volumes effectively. A wealth of open-source tools like Portainer and monitoring solutions such as Datadog exist allowing you to interact with and visualize your Docker volumes. And whilst running WSL, don’t forget the power of simple, built-in Linux commands such as ‘du -sh’ to check the usage size of a folder or volume at any time.

In short, Docker volumes through Docker desktop with WSL give developers a robust and consistent method for handling data persistence across various scenarios, irrespective of the container state. The combination makes a compelling case for developing and running Docker-infused applications right from your Windows workstation.

References:
1. Docker Documentation: Use volumes
2. Microsoft: About the Windows Subsystem for LinuxThe Docker’s data volumes are a crucial part of Docker infrastructure, offering persistent and sharable storage model for Docker containers. It’s essential to recognize where these volumes exist so you can manage them effectively.

When using Docker on Windows through Docker Desktop, the volume information is all stored within the Virtual Machine that Docker Desktop provisions. However, it is imperative to note that this VM exists in a hyper-abstracted state and doesn’t mount directly onto your Windows filesystem.

That being said, most modern Docker Desktop implementations lean towards WSL 2-based backend. Here’s a simple way to find Docker Volumes when running WSL using Docker Desktop:

The location of Docker volumes for Docker Desktop in a Windows environment with WSL 2 usually resides under the Linux file system at:

You can navigate to this folder using the command-line (CLI) in Windows Subsystem for Linux (WSL). Simply open your favorite Linux distribution (Ubuntu, Debian, etc.) on WSL and enter the following command:

cd /var/lib/docker/volumes

There, you will have access to directories correlating to each existing Docker volume. You may require root user permissions to access or modify the files under these directories, however.

It’s important to remember that managing Docker volumes often involves interactions with the Docker engine, typically via Docker CLI commands. For instance:

* Listing all volumes:

* Creating a volume:

$ docker volume create my-vol

* Examining a volume:

$ docker volume inspect my-vol

* Removing a volume:

$ docker volume rm my-vol

Though accessing the file system directly gives an operational level control, interfacing via the Docker engine commands helps ensure a greater consistency and less chance for unwanted side-effects.

I mustn’t ignore to mention the excellent documentation of Docker volumes available at Docker’s official website, where you can find detail insights about volume management in Docker environments.

Remember, Docker Desktop on Windows with its partnership with the Windows Subsystem for Linux simplifies much of this process, providing a more native-feeling Docker experience for Windows. Working together, they strive to maintain Docker’s principle of “Build, Ship, and Run Any App, Anywhere.”<

The impact of mount points in locating your Docker volume is significant, especially when running Windows Subsystem for Linux (WSL), using Docker Desktop. In a Docker file system, a mount point is where the data volume is mounted in the container. Mount points can significantly affect where and how you find your Docker volumes on WSL using Docker Desktop.

To brief it up, Docker offers persistent storage through the use of volumes. Docker volumes hold writable disk areas that are separate from the default Union File System. They enable data to persist even after a container stops. But finding these volumes becomes slightly complex.

Typical Location of Docker Volumes

In a typical non-WSL setup, Docker volumes are often located at

. For example, if you create a volume named myvolume, its data will be stored in

/var/lib/docker/volumes/myvolume/_data

.

# example
docker volume create myvolume
docker run -d -v myvolume:/container/path --name myContainer myImage

Locating Docker Volumes with WSL Using Docker Desktop

However, once we introduce WSL into the equation, locating Docker volumes changes entirely. Since Docker Desktop uses a virtual machine behind the scenes, your Docker volumes are not found in the traditional spot within the WSL filesystem.

Instead, your Docker volumes are stored inside the Docker Desktop Linux VM which Windows doesn’t have direct access to. If you’re looking for your volumes within WSL, this could lead to confusion and difficult debugging processes. Thus, it’s important to remember this change when running WSL with Docker Desktop.

Accessing Your Docker Volumes

Although your volumes might seem out of reach due to this structure change, there’s a way to access them without needing to mess around with the underlying VM. You need to use the

command to copy files between the Docker container and the host file system.

# Copy a file from docker container to host
docker cp <containerId>:/file/path/within/container /host/path/to/copy/file/to

# Copy a file from host to docker container
docker cp /host/path/to/copy/file/from <containerId>:/file/path/within/container

While slightly more convoluted than just accessing a directory in your filesystem, this method provides a secure and reliable way of interacting with your Docker volumes within the WSL environment.

So, the mount points do indeed have an impact on locating your Docker volumes, especially when it comes to running WSL with Docker Desktop.

They make accessing the volumes directly seemingly impossible. Understanding how to navigate it saves time and prevents inevitable frustrations. Remember to use the docker commands wisely to interact with your data.

You may read further on the Docker documentation Docker WSL integration.

When you’re operating in a Windows environment and using the Windows Subsystem for Linux (WSL), working with Docker Volumes can be somewhat different compared to a traditional Linux environment. There are several points that need to be noted.

Docker Volumes Location

First and foremost, the location of Docker volumes might feel a little bit strange if you are used to Linux systems. In Windows environments, Docker Desktop stores Linux files inside a virtual hard disk (VHD). This VHD is labeled as “ext4.vhdx” and it’s typically found within your user directory under:

Docker\wsl\data\ext4.vhdx

. If you navigate into this file from your Windows Explorer, however, you will not find anything recognizable because it’s a specific type of Virtual Hard Drive containing an ext4 file system, which is a standard file system for most Linux distributions.

In order to view or manipulate files within these Docker volumes, you have to go through Docker Desktop’s WSL interface. On your terminal, you can do so by typing in:

command. Now, your terminal should be within the Docker instance of WSL. The function of Docker volumes still remains the same, meaning they store data generated by and used by Docker containers.

wsl -d docker-desktop
cd /var/lib/docker/volumes/
ls

The

path in your shell is where you’ll find all the Docker volumes for your containers. Every Docker volume is identified by a long alphanumeric string, which corresponds to a folder within this directory.

Volume Operations

Other Docker operations such as creating, deleting, and managing Docker volumes fall under the same Docker CLI commands whether on the console, terminal, or CMD.

Create a Docker volume.

docker volume create my_volume

List Docker volumes.

Delete a Docker volume.

docker volume rm my_volume

Moving Data Between Windows and Docker

Sometimes, you may want to share files between your Windows environment and Docker containers. To accomplish this, you are advised to use Docker bind mounts. Bind mounts will have access to the file system path you point towards. Hence, you can easily move data around your local machine and Docker containers seamlessly. Do note that bind mounts rely heavily on your file system’s pathing. Here’s an example of how a Docker container can start and have a shared directory with your local system:

docker run -d --name=my_container -v C:/Users/Your_user/Documents:/shared_folder my_image

This command mounts the host directory,

 C:/Users/Your_user/Documents

, to the container under the path

.

Synchronization

Relying on Docker Desktop’s WSL 2 backend will greatly enhance your Docker experience on Windows. Since it works towards synchronization between Linux and Windows, Docker changes made within WSL will reflect on your Docker Desktop dashboard immediately and vice versa.

Your Responsibility

As with any tool, the main pointers revolve around understanding core functionalities and best practices. Read up on and keep close tabs on the versions and capabilities of both Docker and WSL updates. Microsoft and Docker are continually enhancing these tools and new versions may substantially streamline your Docker volume management and overall containerization tasks on Windows.

References:
1. Docker Documentation: https://docs.docker.com/
2. Microsoft WSL Documentation: https://docs.microsoft.com/en-us/windows/wsl/
Analyzing and understanding the location of Docker volumes when running WSL using Docker Desktop is an essential aspect for any developer working with such configuration. Docker Desktop for Windows uses WSL 2 to run its containers, thus resulting in storing its data as part of the Linux filesystem.

Typically, your Docker volumes, which serve as the designated locales for data persistency, reside within the

the directory inside your Docker virtual machine. This data storage mechanism assures you can consistently access and manage your data across various container life cycles.

/var/lib/docker/volumes/

However, given Docker’s compatibility with the WSL filesystem, you might wonder how this impacts the storage positioning in the mixed environment. When it comes to WSL2, the Docker filesystem symmetry is maintained. Consequently, the Docker Desktop volumes when running on Windows Subsystem for Linux (WSL) remain at the same location, within the Linux system, stored under the

.

But remember that these directories are not directly accessible from the Windows host filesystem. So, to access or navigate these files from Windows, utilize a Linux command-line interface, such as the built-in one in WSL, or you’ll also find Docker volume inspection commands rather useful.

Having adequate knowledge about Docker’s structures, like volumes, is crucial because they form the nuts and bolts of containerization. As a coder, whether you are developing, testing, or deploying applications using Docker and WSL, this comprehension definitely improves your efficiency while handling data persistence and storage structures.

It’s also worth noting that Docker continues to evolve to offer more seamless integration to its users among diverse environments. Keeping track of Docker’s updates, especially those relating to these key aspects, helps you adapt to potential changes quickly.

To dive deeper into understanding docker volumes management, consider reading the official Docker documentation [link]. It will allow you to uncover more detailed insights about managing docker volumes, including exploring different docker volume drivers, and managing volumes through docker CLI commands effectively.