src/cloud.psm1
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function Get-CloudPlatform { <# .SYNOPSIS Determines the cloud platform .DESCRIPTION This function returns a value that is one of 'ec2', 'azure', 'gcloud' or $null. The code checks for the existence of well known agent services to make the determination. #> begin { Write-Log -message ('{0} :: begin - {1:o}' -f $($MyInvocation.MyCommand.Name), (Get-Date).ToUniversalTime()) -severity 'trace'; } process { $cloudPlatform = $null; try { $cloudAgentServices = @(Get-Service -Name @('AmazonSSMAgent', 'Ec2Config', 'GCEAgent', 'WindowsAzureGuestAgent', 'WindowsAzureNetAgentSvc') -ErrorAction SilentlyContinue | % { $_.Name }); if ($cloudAgentServices.Contains('AmazonSSMAgent') -or $cloudAgentServices.Contains('Ec2Config')) { $cloudPlatform = 'ec2'; } elseif ($cloudAgentServices.Contains('WindowsAzureGuestAgent') -or $cloudAgentServices.Contains('WindowsAzureNetAgentSvc')) { $cloudPlatform = 'azure'; } elseif ($cloudAgentServices.Contains('GCEAgent')) { $cloudPlatform = 'gcloud'; } } catch { Write-Log -message ('{0} :: exception: {1}' -f $($MyInvocation.MyCommand.Name), $_.Exception.Message) -severity 'warn'; if ($_.Exception.InnerException) { Write-Log -message ('{0} :: inner exception: {1}' -f $($MyInvocation.MyCommand.Name), $_.Exception.InnerException.Message) -severity 'warn'; } } return $cloudPlatform; } end { Write-Log -message ('{0} :: end - {1:o}' -f $($MyInvocation.MyCommand.Name), (Get-Date).ToUniversalTime()) -severity 'trace'; } } function Get-CloudBucketResource { <# .SYNOPSIS Downloads a file resource from a cloud bucket #> param { [Parameter(Mandatory = $true)] [ValidateSet('amazon-s3', 's3', 'azure-blob-storage', 'az', 'google-cloud-storage', 'gcs')] [string] $platform, [Parameter(Mandatory = $true)] [string] $bucket, [Parameter(Mandatory = $true)] [string] $key, [Parameter(Mandatory = $true)] [string] $destination, [switch] $overwrite = $false, [switch] $force = $false } begin { Write-Log -message ('{0} :: begin - {1:o}' -f $($MyInvocation.MyCommand.Name), (Get-Date).ToUniversalTime()) -severity 'trace'; } process { if ($force) { try { New-Item -Path ([System.IO.Path]::GetDirectoryName($destination)) -ItemType Directory -Force Write-Log -message ('{0} :: destination directory created: {1} ' -f $($MyInvocation.MyCommand.Name), ([System.IO.Path]::GetDirectoryName($destination))) -severity 'debug'; } catch { Write-Log -message ('{0} :: failed to create destination directory: {1} ' -f $($MyInvocation.MyCommand.Name), ([System.IO.Path]::GetDirectoryName($destination))) -severity 'error'; } } try { if (-not (Test-Path -Path ([System.IO.Path]::GetDirectoryName($destination)) -ErrorAction SilentlyContinue)) { throw [System.IO.DirectoryNotFoundException]('destination directory path does not exist: {0}. use `-force` switch or specify a destination directory path that exists.' -f ([System.IO.Path]::GetDirectoryName($destination))); } if ((-not $overwrite) -and (Test-Path -Path $destination -ErrorAction SilentlyContinue)) { throw [System.ArgumentException]('destination file exists: {0}. use `-overwrite` switch or specify a destination file path that does not exist.' -f $destination); } switch -regex ($platform) { 'amazon-s3|s3' { Copy-S3Object -BucketName $bucket -Key $key -LocalFile $destination; } 'azure-blob-storage|az' { # https://docs.microsoft.com/en-us/powershell/module/az.storage/get-azstoragefilecontent?view=azps-1.8.0 Get-AzStorageFileContent -ShareName $bucket -Path $key -Destination $destination; } 'google-cloud-storage|gcs' { Read-GcsObject -Bucket $bucket -ObjectName $key -OutFile $destination; } default { throw [System.ArgumentException]('unsupported platform: {0}. use: amazon-s3|azure-blob-storage|google-cloud-storage' -f $platform); } } if (Test-Path -Path $destination -ErrorAction SilentlyContinue) { Write-Log -message ('{0} :: {1} fetched from {2}/{3}/{4}' -f $($MyInvocation.MyCommand.Name), $destination, $platform, $bucket, $key) -severity 'info'; } else { Write-Log -message ('{0} :: error fetching {1} from {2}/{3}/{4}' -f $($MyInvocation.MyCommand.Name), $destination, $platform, $bucket, $key) -severity 'warn'; } } catch { Write-Log -message ('{0} :: exception fetching {1} from {2}/{3}/{4}: {5}' -f $($MyInvocation.MyCommand.Name), $destination, $platform, $bucket, $key, $_.Exception.Message) -severity 'error'; if ($_.Exception.InnerException) { Write-Log -message ('{0} :: inner exception fetching {1} from {2}/{3}/{4}: {5}' -f $($MyInvocation.MyCommand.Name), $destination, $platform, $bucket, $key, $_.Exception.InnerException.Message) -severity 'error'; } } } end { Write-Log -message ('{0} :: end - {1:o}' -f $($MyInvocation.MyCommand.Name), (Get-Date).ToUniversalTime()) -severity 'trace'; } } |