Restart-CloudInstances.ps1

param(
   [Parameter(Mandatory=$true)]
   [string]$subscriptionName,
   [Parameter(Mandatory=$true)]
   [string]$serviceName,
   [string]$slot="Staging")

Write-Output "$(Get-Date) - Selecting $SubscriptionName"
Select-Azuresubscription -SubscriptionName $SubscriptionName

if ($SubscriptionName -eq (Get-AzureSubscription -Current).SubscriptionName)
{
   Write-Output "$(Get-Date) - Selected $SubscriptionName"
}
else{
   throw "Failed to Set subscription to $SubscriptionName"
}

$service=Get-AzureService|  where {$_.ServiceName -match $serviceName}| Get-AzureDeployment -Slot $Slot -ErrorAction Ignore
if (!($service))
{
   Write-Warning "No service found for $serviceName in $SubscriptionName"
   return
}

$Instances=$service.RoleInstanceList.InstanceName

if (!($Instances))
{
   Write-Warning "No Instances found for $serviceName in $SubscriptionName"
   return
}
else{ Write-Host "$(Get-Date) - Found $($Instances.count) instances for $serviceName for $slot "}

foreach($instance in $Instances)
{
   Write-Output "$(Get-Date) - Rebooting: $instance"
   Write-Host "ReSet-AzureRoleInstance -ServiceName $serviceName -Slot $Slot -InstanceName $instance -reboot"
   ReSet-AzureRoleInstance -ServiceName $serviceName -Slot $Slot -InstanceName $instance -reboot

   while ((Get-AzureDeployment $ServiceName -Slot $slot).RoleInstanceList | Where-Object { $_.InstanceStatus -ne "ReadyRole" } | ft -Property RoleName, InstanceName, InstanceStatus )
   {
      Write-Host "$(Get-Date) - Waiting" -NoNewLine
      Sleep 5
      Write-Host "..."
   }
}