New and improved SQL Always On template (#368)

* Initial commit of new SQL HA template

* Next round of changes, added db name, fixed warnings

* Last set of changes before first release

* Update documentation for new version of template

Author: JeffGoldner

sql-2016-alwayson/CreateADPDC.ps1.zip

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+# Create a two node SQL Server Always On Cluster with SQL 2016 on Windows Server 2016
+
+This template deploys two SQL Server Enterprise, Standard or Developer instances in an Always On Availability Group. It creates the following resources:
+
+* A network security group
+* A virtual network
+* Four storage accounts (One for AD, One for SQL, One for File Share witness and One for VM diagnostic)
+* Four public IP address (One for AD, Two for each SQL VM and One for Public LB bound to SQL Always On Listener)
+* One external load balancer for SQL VMs with Public IP bound to the SQL Always On listener
+* One VM (WS2016) configured as Domain Controller for a new forest with a single domain
+* Two VM (WS2016) configured as SQL Server 2016 SP1 or SP2 Enterprise/Standard/Developer and clustered (must use the marketplace images)
+* One VM (WS2016) configured as File Share Witness for the cluster
+* One Availability Set containing the SQL and FSW 2016 VMs
+
+## Notes
+
+This template uses Azure Stack Marketplace images. These need to be available on your Azure Stack instance:
+
+* Windows Server 2016 Datacenter Image (for AD and FSW VMs)
+* Choice of SQL Server 2016 SP1 or SP2 on Windows Server 2016 (Enterprise, Standard or Developer)
+* Latest SQL IaaS Extension 1.2.x (currently 1.2.30)
+* Latest DSC Extension (2.76.0, or higher)
+* Latest Custom Script Extension for Windows (1.9.1, or higher)
+
+## Configuration
+
+* Each SQL VMs will have the number and size of data disks specified, of up to 1TiB each. The SQL extension will configured these into a single volume using Storage Spaces.
+* The SQL VMs and the file share witness will be configured in an Availability Set
+  * Integrated Systems (fault domains:3, update domains:5)
+  * ASDK will automatically use fault domains:1, update domains:1)
+* The template configures the SQL instances with contained database authentication set to true.
+* The *external* DNS suffix for public IP addresses (ASDK default: azurestack.external)
+
+## Parameters
+
+| Parameter Name | Description | Type | Default Value
+| --- | --- | --- | ---
+| _artifactsLocation | Blob store where all deployment artifacts are stored | string |  https://raw.githubusercontent.com/Azure/AzureStack-QuickStart-Templates/master/sql-2016-alwayson
+| adminUsername | Admin user for new VMs and domain | string | localadmin 
+| adminPassword | Password used for the new admin | securestring | (must be specified)
+| adVMSize | VM size for the domain controller | string* | Standard_D2_v2
+| witnessVMSize | VM size for the file share witness | string* | Standard_D1_v2
+| domainName | Name of the new AD domain | string | fabrikam.local
+| dnsSuffix | Name of the Azure Stack instance's external domain | string |
+| virtualNetworkAddressRange | Address range for new VNET in CIDR format  | string | 10.0.0.0/16
+| staticSubnet | Range of addresses from the virtualNetworkAddressRange for static IP allocation | string | 10.0.0.0/24
+| sqlSubnet | Address range used by the SQL & FSW VMs | string | 10.0.1.0/26
+| adPDCNICIPAddress | IP address for the AD VM | string | 10.0.0.250
+| deploymentPrefix | DNS prefix for the public IP addresses | string | aodns
+| virtualNetworkName | Name of the virtual network | string | sqlhaVNET
+| sqlServerServiceAccountUserName | The SQL Server Service Account name | string | sqlservice
+| sqlServerServiceAccountPassword | Password for the service account | secure string |
+| sqlAuthUserName | SQL Server Admin user | string | sqlsa
+| sqlAutPassword | Password for the SQL Server Admin | secure string |
+| sqlStorageAccountName | Name for the SQL Storage Account | string | derived from resource group name
+| sqlStorageAccountType | Standard or Premium Storage | string | Premium_LRS
+| sqlServerOffer | Name of the SQL Offer | string* | SQL2016SP2-WS2016
+| sqlServerSku | Name of the SKU | string* | Enterprise
+| sqlVMSize | Size of the SQL Server VMs | string * | Standard_DS2_v2
+| sqlAOAGName | SQL Always On Availability Group Name | string | sqlaa-ag
+| sqlAOListenerName | SQL Always On listener name | string | derived from the resource group name
+| sqlAOListenerPort | TCP port number used by the listener | string | 1433
+| workloadType | SQL VM Workload (GENERAL, OLTP, DW) | string* | GENERAL
+| vmDiskSize | SQL data disk size (128, 256, 512, 1023) | string | 128
+| numberOfSqlVMDisks | Number of SQL data disks per server | int | 2
+| sampleDatabaseName | Sample HA database created during deployment | string | AutoHa-sample
+| autoPatchingDay | Day of the week to download and apply patches | string* | Sunday
+| autoPatchingStartHour | Hour to start patching process | string* | 2
+
+* parameter has a list of allowed values; please refer to the template.