Private/az-commands.ps1
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$MAX_RETRY_COUNT = 4 # for some operations, retry a couple of times $SNAILMODE_MAX_RETRY_COUNT = 10 # For very slow tenants, retry more often $script:Snail_Mode = $false $Sleep_Factor = 1 $Snail_Maximum_Sleep_Factor = 90 # times ten is 15 minutes function ConvertLinesToObject($lines) { if($null -eq $lines) { return $null } $linesJson = [System.String]::Concat($lines) return ConvertFrom-Json $linesJson } $PERMISSION_ALREADY_ASSIGNED = "Permission already assigned" function CheckAzOutput($azOutput) { foreach ($outputElement in $azOutput) { if ($null -ne $outputElement) { if ($outputElement.GetType() -eq [System.Management.Automation.ErrorRecord]) { if ($outputElement.ToString().Contains("Permission being assigned already exists on the object")) { # TODO: Does this work in non-English environments? Write-Information "Permission is already assigned when executing $azCommand" Write-Output $PERMISSION_ALREADY_ASSIGNED } elseif ($outputElement.ToString().EndsWith("does not exist or one of its queried reference-property objects are not present.")) { # This indicates we are in a tenant with especially long delays between creation of an object and when it becomes available via Graph (this happens and it seems to be tenant-specific). # Let's go into snail mode and thereby grant Graph more time Write-Warning "Created object is not yet available via MS Graph. Reducing executing speed to give Graph more time." $script:Snail_Mode = $true $Sleep_Factor = 0.8 * $Sleep_Factor + 0.2 * $Snail_Maximum_Sleep_Factor # approximate longer sleep times Write-Verbose "Retrying operations now $SNAILMODE_MAX_RETRY_COUNT times, and waiting for (n * $Sleep_Factor) seconds on n-th retry" } elseif ($outputElement.ToString().StartsWith("WARNING")) { if ($outputElement.ToString().StartsWith("WARNING: The underlying Active Directory Graph API will be replaced by Microsoft Graph API") ` -or $outputElement.ToString().StartsWith("WARNING: This command or command group has been migrated to Microsoft Graph API.")) { # Ignore, we know that } else { Write-Warning $outputElement.ToString() } } else { if ($outputElement.ToString().contains("does not have authorization to perform action 'Microsoft.Authorization/roleAssignments/write'")) { Write-Error "You have insufficient privileges to assign roles to Managed Identities. Make sure you have the Global Admin or Privileged Role Administrator role." } elseif($outputElement.ToString().Contains("Forbidden")) { Write-Error "You have insufficient privileges to complete the operation. Please ensure that you run this CMDlet with required privileges e.g. Global Administrator" } #Write-Error $outputElement throw $outputElement } } else { Write-Output $outputElement # add to return value of this function } } } } function AzLogin { # Check whether az is available $azCommand = Get-Command az 2>&1 if ($azCommand.GetType() -eq [System.Management.Automation.ErrorRecord]) { if ($azCommand.CategoryInfo.Reason -eq "CommandNotFoundException") { $errorMessage = "Azure CLI (az) is not installed, but required. Please use the Azure Cloud Shell or install Azure CLI as described here: https://docs.microsoft.com/en-us/cli/azure/install-azure-cli" Write-Error $errorMessage throw $errorMessage } else { Write-Error "Unknown error checking for az" throw $azCommand } } # check whether already logged in $env:AZURE_HTTP_USER_AGENT = "pid-a262352f-52a9-4ed9-a9ba-6a2b2478d19b" $account = az account show 2>&1 if ($account.GetType() -eq [System.Management.Automation.ErrorRecord]) { if (($account.ToString().Contains("az login")) -or ($account.ToString().Contains("az account set"))) { Write-Host "Not logged in to az yet. Please log in." $null = az login # TODO: Check whether the login worked AzLogin } else { Write-Error "Error $account while trying to use az" # possibly az not installed? throw $account } } else { $accountInfo = ConvertLinesToObject($account) Write-Information "Logged in to az as $($accountInfo.user.name)" } return $accountInfo } $azVersionInfo = $null function GetAzVersion { if ($null -eq $azVersionInfo) { $azVersionInfo = ConvertLinesToObject -lines $(az version) } return $azVersionInfo } function AzUsesAADGraph { $cliVersion = [Version]::Parse((GetAzVersion).'azure-cli') return $cliVersion -lt '2.37' } # It is intended to use for az cli add permissions and az cli add permissions admin # $azCommand - The command to execute. # function ExecuteAzCommandRobustly($azCommand, $principalId = $null, $appRoleId = $null, $GraphBaseUri = $null) { $azErrorCode = 1234 # A number not null $retryCount = 0 $script:Snail_Mode = $false while ($azErrorCode -ne 0 -and ($retryCount -le $MAX_RETRY_COUNT -or $script:Snail_Mode -and $retryCount -le $SNAILMODE_MAX_RETRY_COUNT)) { $lastAzOutput = Invoke-Expression "$azCommand 2>&1" # the output is often empty in case of error :-(. az just writes to the console then $azErrorCode = $LastExitCode try { $lastAzOutput = CheckAzOutput($lastAzOutput) # If we were request to check that the permission is there and there was no error, do the check now. # However, if the permission has been there previously already, we can skip the check if($null -ne $appRoleId -and $azErrorCode -eq 0 -and $PERMISSION_ALREADY_ASSIGNED -ne $lastAzOutput) { $appRoleAssignments = ConvertLinesToObject -lines $(az rest --method get --url "$GraphBaseUri/v1.0/servicePrincipals/$principalId/appRoleAssignments") $grantedPermission = $appRoleAssignments.value | Where-Object { $_.appRoleId -eq $appRoleId } if ($null -eq $grantedPermission) { $azErrorCode = 999 # A number not 0 } } } catch { Write-Warning $_ $azErrorCode = 654 # a number not 0 } if ($azErrorCode -ne 0) { ++$retryCount Write-Verbose "Retry $retryCount for $azCommand after $($retryCount * $SLEEP_FACTOR) seconds of sleep" Start-Sleep ($retryCount * $SLEEP_FACTOR) # Sleep for some seconds, as the grant sometimes only works after some time } } if ($azErrorCode -ne 0 ) { if ($null -eq $lastAzOutput) { $lastAzOutput = "no az output" } Write-Error "Error $azErrorCode when executing $azCommand : $($lastAzOutput.ToString())" throw "Error $azErrorCode when executing $azCommand : $($lastAzOutput.ToString())" } else { return $lastAzOutput } } |