3 Ways Mapping APEX Domains to Azure Functions

01-set-azwebapp.ps1

$resourceGroupName = "<RESOURCE_GROUP_NAME>"
$functionAppName = "<FUNCTION_APP_NAME>"
$domainName = "contoso.com"
Set-AzWebApp `
    -ResourceGroupName $resourceGroupName `
    -Name $functionAppName `
    -HostNames @( $domainName, "$functionAppName.azurewebsites.net" )

02-az-functionapp.sh

az functionapp config hostname add \
    -g <RESOURCE_GROUP_NAME> \
    -n <FUNCTIONAPP_NAME> \
    --hostname "contoso.com"

03-add-hostname.bicep

resource fncapp 'Microsoft.Web/sites@2020-06-01' = {
    name: functionApp.name
    ...
}

resource fncappHostname 'Microsoft.Web/sites/hostNameBindings@2020-06-01' = {
    name: '${fncapp.name}/contoso.com'
    location: fncapp.location
}

04-add-hostname.json

{
  ...
  "resources": [
    ...
    {
      "type": "Microsoft.Web/sites/hostNameBindings",
      "apiVersion": "2020-06-01",
      "name": "[format('{0}/{1}', variables('functionApp').name, 'contoso.com')]",
      "location": "[variables('functionApp').location]",
      "dependsOn": [
        "[resourceId('Microsoft.Web/sites', variables('functionApp').name)]"
      ]
    },
    ...
  ]
  ...
}