Publish an Azure Web App using a Service Principal in PowerShell to an Azure RM App Service

Publish-AzureRMWebappProject.ps1

[CmdletBinding()]
param (
    [Parameter(Mandatory = $True)]
    [pscredential]
    $Credential,

    [Parameter(Mandatory = $True)]
    [System.String]
    $TenantId,

    [Parameter(Mandatory = $True)]
    [System.String]
    $SubscriptionId,

    [Parameter(Mandatory = $True)]
    [System.String]
    $WebAppPath,

    [Parameter(Mandatory = $True)]
    [System.String]
    $ResourceGroupName,

    [Parameter(Mandatory = $True)]
    [System.String]
    $WebAppServiceName,

    [Parameter()]
    [System.String]
    $SlotName,

    [Parameter()]
    [System.String]
    $MSDeployPath = "$env:ProgramFiles\IIS\Microsoft Web Deploy V3\msdeploy.exe"
)

if (-not (Test-Path -Path $MSDeployPath))
{
    Throw "MSDeploy.exe not found at '$MSDeployPath'. Please install MSDeploy or specify the path to MSDeploy.exe on this system."
}

# Connect to Azure using SP
$connectParameters = @{
    Credential     = $Credential
    TenantId       = $TenantId
    SubscriptionId = $SubscriptionId
}

Write-Verbose -Message 'Connecting to Azure.'

$null = Add-AzureRmAccount @connectParameters -ServicePrincipal
  
# If a slot name is passed ensure all cmdlets use it
if ([String]::IsNullOrEmpty($SlotName)) {
    $slotParameters = $null
} else {
    $slotParameters = @{ Slot = $SlotName }
}

# Get the Publishing profile from Azure
$publishProfilePath = Join-Path -Path $ENV:Temp -ChildPath 'publishprofile.xml'

Write-Verbose -Message 'Getting publishing profile for web app'
$null = Get-AzureRmWebAppSlotPublishingProfile `
    -OutputFile $publishProfilePath `
    -Format WebDeploy `
    -ResourceGroupName $ResourceGroupName `
    -Name $WebAppServiceName `
    @slotParameters

# Stop the web app slot to make sure deployment is possible.
Write-Verbose -Message 'Stopping web app.'

$null = Stop-AzureRmWebAppSlot `
    -ResourceGroupName $ResourceGroupName `
    -Name $WebAppServiceName `
    @slotParameters

# Deploy the web site
$source = "-source:contentPath=$WebAppPath"
$dest = "-dest:contentPath=d:\home\site\wwwroot\,publishSettings=$publishProfilePath"

Write-Verbose -Message 'Publising web app content.'
& $MSDeployPath @('-verb:sync', $source, $dest)

# Start the web app back up
Write-Verbose -Message 'Starting web app.'

$null = Start-AzureRmWebAppSlot `
    -ResourceGroupName $ResourceGroupName `
    -Name $WebAppServiceName `
    @slotParameters

Write-Verbose -Message 'Waiting for web app to start up...'

$webappSlot = Get-AzureRmWebAppSlot `
    -ResourceGroupName $ResourceGroupName `
    -Name $WebAppServiceName `
    @slotParameters

# Wait for the site to report that it has started (optional)
while ($webappSlot.state -ne 'Running')
{
    Start-Sleep -Seconds 1

    Write-Verbose -Message 'Waiting for web app to start up...'
    $webappSlot = Get-AzureRmWebAppSlot `
        -ResourceGroupName $ResourceGroupName `
        -Name $WebAppServiceName `
        @slotParameters
}

Write-Verbose -Message 'Web app deployment complete.'