docker system_error ai_generated partial

Error response from daemon: error while mounting volume '/host_mnt/c/Users/user/data': permission denied

ID: docker/volume-mount-permission-denied-windows

Also available as: JSON · Markdown · 中文
78%Fix Rate
82%Confidence
1Evidence
2023-04-18First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Docker Desktop 4.19.0 active — — —
Docker Desktop 4.22.1 active — — —
Windows 10 21H2 active — — —
Windows 11 22H2 active — — —

Root Cause

On Docker Desktop for Windows, bind mounts from the C drive require shared drive permissions; if the drive is not shared or the user lacks access, mounting fails with permission denied.

generic

中文

在适用于 Windows 的 Docker Desktop 上，从 C 盘进行的绑定挂载需要共享驱动器权限；如果驱动器未共享或用户无访问权限，挂载将失败并返回权限被拒绝。

Official Documentation

https://docs.docker.com/desktop/settings/windows/#file-sharing

Workarounds

  1. 85% success Share the C drive in Docker Desktop: Settings > Resources > File Sharing > add 'C:\' and apply. Then restart Docker Desktop and retry the mount. 
    Share the C drive in Docker Desktop: Settings > Resources > File Sharing > add 'C:\' and apply. Then restart Docker Desktop and retry the mount.
  2. 75% success Move your project folder to a drive that is already shared (e.g., D:\) or to the user profile directory under C:\Users\ which is often shared by default. 
    Move your project folder to a drive that is already shared (e.g., D:\) or to the user profile directory under C:\Users\ which is often shared by default.
  3. 70% success Use a named volume instead of a bind mount: 'docker volume create mydata' and then 'docker run -v mydata:/app/data' to avoid host filesystem permission issues. 
    Use a named volume instead of a bind mount: 'docker volume create mydata' and then 'docker run -v mydata:/app/data' to avoid host filesystem permission issues.

中文步骤

  1. 在 Docker Desktop 中共享 C 盘：设置 > 资源 > 文件共享 > 添加 'C:\' 并应用。然后重启 Docker Desktop 并重新尝试挂载。
  2. 将项目文件夹移动到已共享的驱动器（例如 D:\）或默认共享的用户配置文件目录 C:\Users\ 下。
  3. 使用命名卷代替绑定挂载：'docker volume create mydata' 然后 'docker run -v mydata:/app/data' 以避免主机文件系统权限问题。

Dead Ends

Common approaches that don't work:

  1. Running Docker Desktop as Administrator 70% fail

    Even as Administrator, the C drive must be explicitly shared in Docker Desktop settings; admin privileges alone do not bypass the sharing requirement.

  2. Changing file permissions on the host folder using icacls 80% fail

    Docker Desktop uses a virtual filesystem (gRPC FUSE) to mount Windows paths; host NTFS permissions are not the primary issue—the Docker service itself needs share access.

  3. Using a relative path instead of absolute path in docker run -v 60% fail

    Relative paths are resolved relative to the current directory, but if the resolved absolute path is still on a non-shared drive, the same error occurs.