Shrink docker desktop too huge virtual disk. Shrink docker desktop ext4 WSL Windows 10 11

shrink-docker-desktop-vhdx.ps1

# Script to shrink docker desktop data, a common issue at WSL 2
# Most of the script is generated with ChatGPT

# Check if the script is running as administrator
$currentUser = [Security.Principal.WindowsIdentity]::GetCurrent()
$adminRole = [Security.Principal.WindowsBuiltInRole]::Administrator
$currentPrincipal = New-Object Security.Principal.WindowsPrincipal($currentUser)
if (-not $currentPrincipal.IsInRole($adminRole)) {
    Write-Host "Requesting administrator privileges..."
    Start-Process powershell -ArgumentList "-NoProfile -ExecutionPolicy Bypass -File `"$PSCommandPath`"" -Verb RunAs
    exit
}

# Define the VHDX file path
$vhdxPath = "$env:LOCALAPPDATA\Docker\wsl\disk\docker_data.vhdx"

# Function to stop Docker Desktop application
function Stop-DockerDesktop {
    Write-Host "Stopping Docker Desktop application..."

    # Stop Docker Desktop GUI application
    $guiProcess = Get-WmiObject Win32_Process -Filter "Name = 'Docker Desktop.exe'"
    if ($guiProcess) {
        $guiProcess | ForEach-Object {
            try {
                Stop-Process -Id $_.ProcessId -Force
                Write-Host "Stopped GUI process ID: $($_.ProcessId)"
            } catch {
                Write-Host "Failed to stop GUI process ID: $($_.ProcessId)"
            }
            Start-Sleep -Seconds 1
        }
    } else {
        Write-Host "Docker Desktop GUI application is not running."
    }

    # Stop Docker backend and dev-envs processes
    $dockerProcesses = Get-WmiObject Win32_Process -Filter "Name = 'com.docker.backend.exe' OR Name = 'com.docker.dev-envs.exe'"
    if ($dockerProcesses) {
        $dockerProcesses | ForEach-Object {
            try {
                Stop-Process -Id $_.ProcessId -Force
                Write-Host "Stopped process ID: $($_.ProcessId)"
            } catch {
                Write-Host "Failed to stop process ID: $($_.ProcessId)"
            }
            Start-Sleep -Seconds 1
        }
        Write-Host "Docker Desktop application stopped."
    } else {
        Write-Host "Docker Desktop application is not running."
    }
}

# Stop Docker Desktop application
Stop-DockerDesktop

# Stop Docker Desktop service
Write-Host "Stopping Docker Desktop service..."
Stop-Service -Name "com.docker.service" -Force
Start-Sleep -Seconds 1
Write-Host "Docker Desktop service stopped."

# Stop WSL 2 container
Write-Host "Stopping WSL 2 container..."
wsl --shutdown
Start-Sleep -Seconds 1
Write-Host "WSL 2 container stopped."

# Shrink the VHDX file using diskpart
Write-Host "Shrinking VHDX file using diskpart..."
$diskpartScript = @"
select vdisk file="$vhdxPath"
compact vdisk
"@

$diskpartScriptPath = [System.IO.Path]::GetTempFileName()
$diskpartScript | Out-File -FilePath $diskpartScriptPath -Encoding ASCII

diskpart /s $diskpartScriptPath

Remove-Item $diskpartScriptPath
Write-Host "VHDX file shrink operation completed."

# Pause at the end of the script
Write-Host "Script execution completed."
Pause