download_azcopy.ps1

#Requires -Version 5.1
Set-StrictMode -Version Latest
$ErrorActionPreference = "Stop"

$StorageAccounts = @(
    "blobvirtualpersona",
    "syncbillblob"
)

$Stamp      = Get-Date -Format "yyyyMMdd_HHmmss"
$BackupRoot = Join-Path $env:USERPROFILE "blob_backup_$Stamp"
New-Item -ItemType Directory -Path $BackupRoot -Force | Out-Null

# azcopy tuning — AUTO scales to available bandwidth
$env:AZCOPY_CONCURRENCY_VALUE   = "AUTO"
$env:AZCOPY_BUFFER_GB           = "4"
$env:AZCOPY_LOG_LOCATION        = Join-Path $BackupRoot "_azcopy_logs"
$env:AZCOPY_JOB_PLAN_LOCATION   = Join-Path $BackupRoot "_azcopy_plans"
New-Item -ItemType Directory -Path $env:AZCOPY_LOG_LOCATION      -Force | Out-Null
New-Item -ItemType Directory -Path $env:AZCOPY_JOB_PLAN_LOCATION -Force | Out-Null

$Expiry = (Get-Date).ToUniversalTime().AddHours(4).ToString("yyyy-MM-ddTHH:mmZ")

Write-Host "==========================================="
Write-Host "Downloading blobs"
Write-Host "Destination: $BackupRoot"
Write-Host "Started at:  $(Get-Date)"
Write-Host "==========================================="

foreach ($SA in $StorageAccounts) {

    Write-Host ""
    Write-Host "======================================================"
    Write-Host "Storage Account: $SA"
    Write-Host "======================================================"

    $Key = az storage account keys list `
        --account-name $SA `
        --query "[0].value" `
        -o tsv 2>$null

    if ([string]::IsNullOrWhiteSpace($Key)) {
        Write-Host "Could not retrieve key for $SA. Skipping."
        continue
    }
    Write-Host "Key retrieved."

    # account-level SAS: blob service, service+container+object, read+list
    $Sas = az storage account generate-sas `
        --account-name $SA `
        --account-key $Key `
        --services b `
        --resource-types sco `
        --permissions rl `
        --expiry $Expiry `
        -o tsv 2>$null

    if ([string]::IsNullOrWhiteSpace($Sas)) {
        Write-Host "Could not generate SAS for $SA. Skipping."
        continue
    }

    $Dest = Join-Path $BackupRoot $SA
    New-Item -ItemType Directory -Path $Dest -Force | Out-Null

    azcopy copy `
        "https://$SA.blob.core.windows.net?$Sas" `
        $Dest `
        --recursive `
        --overwrite=ifSourceNewer `
        --check-length=true `
        --preserve-last-modified-time `
        --log-level=INFO

    if ($LASTEXITCODE -ne 0) {
        Write-Host "azcopy exited with code $LASTEXITCODE for $SA"
    }

    Write-Host "Finished $SA"
}

Write-Host ""
Write-Host "==========================================="
Write-Host "Backup completed."
Write-Host "Location:    $BackupRoot"
Write-Host "azcopy logs: $($env:AZCOPY_LOG_LOCATION)"
Write-Host "Finished at: $(Get-Date)"
Write-Host "==========================================="

powershell -ExecutionPolicy Bypass -File .\download_hades_azcopy.ps1