# リトライ間隔（秒）
$RetryIntervalInSeconds = 120
# リトライ回数
$NumberOfRetryAttempts = 2
# メイン処理完了を表す真偽値
$CmdOk = $False

# 処理の開始時間
$StartTime = (Get-Date).ToUniversalTime()

# 自動作成された接続資産（実行アカウント）を利用して Azure にログイン
$Connection = Get-AutomationConnection -Name "AzureRunAsConnection"
$Account = Add-AzureRmAccount `
    -ServicePrincipal `
    -TenantId $Connection.TenantId `
    -ApplicationId $Connection.ApplicationId `
    -CertificateThumbprint $Connection.CertificateThumbprint

# 行いたい処理
Function Perform-WhatIdLikeToDo {
    Write-Output (Get-AzureRmVM | Select Name, ResourceGroupName, Location)
}

do {
    try {
        # 実行する処理
        $Result = Perform-WhatIdLikeToDo
        Write-Output $Result

        $CmdOk = $True
    } catch {
        # エラー（例外）の詳細を表示
        write-output "Exception Caught..."

        $ErrorMessage = $_.Exception.Message
        $StackTrace = $_.Exception.StackTrace
        Write-Output "Error Occurred: Message: $ErrorMessage, stack: $StackTrace."
        Write-Output "Retry attempts left: $NumberOfRetryAttempts"
        Write-Output "---------------------------------------------------------"

        # 次のリトライに備える
        $NumberOfRetryAttempts--
        Start-Sleep -Seconds $RetryIntervalInSeconds
     }
} while (-not $CmdOk -and $NumberOfRetryAttempts -ge 0)

# 実行結果の表示
$EndTime = (Get-Date).ToUniversalTime()
Write-Output "---------------------------------------------------------"
Write-Output " Process status "
Write-Output " - Success?     : $CmdOk"
Write-OUtput " - Elapsed time : $(($EndTime - $StartTime).TotalSeconds) [sec]"
Write-Output "---------------------------------------------------------"