Although you can use SQL Server Administering Studio or T-SQL to administer AlwaysOn, SQL Server Denali CTP 3 includes 25 cmdlet which calm accommodate complete advantage for creating, confiiguring and administering the AlwaysOn database feature. In this column we’ll attending at application Powershell to accomplish assorted administering tasks for AlwayOn.
Note: This blog column describes appearance in SQL Server Denali CTP 3 which may change on final artefact release.
You’ll need a simple Windows 2008 R2 array with two standalone installs of SQL Server. I say simple because you don’t acquire to anguish about aggregate storage, quorum disks and aggregate MSTDTC installations like you would in a acceptable SQL Server accession on a Windows Server Failover Cluster. All you charge are two servers active Windows Server 2008 R2 Enterprise Edition. For analysis purposes I’ve bureaucracy a two-node Windows Server Failover Array as follows:
1. Configure a Clandestine basic apparatus arrangement for intra-cluster communication. Note this footfall is alternative and not absolutely all-important for a bald minimum cluster, but I bureaucracy it up anyways to actor aing to what I’ll acquire in production. This arrangement uses a abstracted IP subnet than the Internal alone arrangement I had already bureaucracy in Hyper-V.
2. Bureaucracy the clandestine alone network which allows advice amid basic machines only.
3. Add the clandestine arrangement to anniversary of the basic machines.
4. On the basic machines accredit IP addresses beneath Arrangement and Sharing Center. Here’s a table of my setup:
DC1= Area Controller
Cluster1 = array administering IP (assigned during array configuration)
Availability Accumulation Adviser (assigned during AlwaysOn Availability Accumulation Adviser configuration)
*Don’t anguish about these for now.
5. Since we’re application a two-node array after a quorum deejay it is appropriate to use a Bulge and Book Allotment Majority so I’ll bureaucracy arrangement allotment which is read/write attainable by the Array Annual account. For my testing purposes I created allotment on my DC1 apparatus alleged \DC1Share1 amid on DC1 C:Share1 folder.
1. Add the Failover Array Administer affection to both modes by active the following PowerShell commands
2. Actualize the array by active the afterward PowerShell commands on one node:
3. Set the quorum approach to Bulge and Book Allotment Majority by active the afterward command on one node:
Install SQL Server and this important – As a standalone instance. Sorry no Powershell commands actuality aloof run through the accession screens. Be abiding to set the SQL Server annual annual to a area annual (I had issues aback application Bounded System).
You charge to acquire a database which is not already allotment of an AlwaysOn Availability Accumulation in FULL accretion approach and has been backed up. As a analysis I’ll aloof use the old academy pubs sample database. Run the instpubs.sql book and actualize a advancement application Powershell.
Start SQL Server Administering Studio and baddest “Start PowerShell” from Object Explorer. Run the afterward command to advancement the database to the absence advancement directory:
You’ll charge to actualize a allotment attainable by both nodes for autumn the SQL Server database and transaction log initialization backups. For my archetype I’ll actualize a binder alleged sqlrec beneath Node1’s C drive C:sqlrec and allotment called sqlrec \node1sqlrec
The CTP3 adaptation of Books Online contains some affidavit and scripts for configuring AlwaysOn about as to be accepted with pre-release software some capacity are not covered and there are affidavit errors in added sections. As I’ve encountered affidavit errors I submitted Affix Items (see Affix Items beneath for details). Relevant helps capacity included in CTP3 are listed below:
Specify the Endpoint URL Aback Adding or Modifying an Availability Replica
Enable and Disable AlwaysOn
Create and Configure an Availability Group
Rather than use the scripts includes with Books Online which alone handle allotment of the agreement or address my own calligraphy I anticipate its added important to authenticate the commands to actualize and configure AlwaysOn. By aing Powershell as artlessly active command against vs. autograph a calligraphy you’ll apprentice how to use Powershell commands for new administering functions. Once you’re blessed with the after-effects of the commands you again can about-face the alternation of commands into a script. Let’s get started…
Note: The afterward examples assignment aural the SQLServer provider while affiliated to specific SQL Server machines. In my archetype I’m application machines called node1 and node2 active a absence instance. Pay accurate absorption to the ambience in which the commands are run on either Node1 (primary) or Node2 (secondary).
Note: The force switch. Enabling or disabling HADR requires SQL Server annual to be restarted. If you omit the force about-face you’ll be prompted to affirm SQL Server restart.
Note: In adjustment to retrieve the IsHadrEnabled acreage I charge to to cd to node2 and in adjustment to calmly change directories aback I’m application the pushd and popd commands to abundance the accepted area (pushd) and about-face aback (popd).
Configure HADR Endpoints and set accompaniment to started:
Note: This doesn’t absolutely actualize the replicate, rather the –AsTemplate constant allows you to actualize a analogue of the replica which is stored in the $replica1 and $replica2 variables. These variables will be acclimated aback creating the availability accumulation next.
Note: This is what you affix to (or a atomic that’s my impression) from your applicant machines. The adviser provides a arrangement name and IP Address which will failover amid nodes.
SQL Server includes three cmdlets for acceptance the bloom of the assorted AlwaysOn components:
The easiest way to run the analysis cmdlets is aural the SQL Server provider ambience as follows:
To manually abort over an Availability Accumulation we use the Switch-SqlAvailabilityGroup cmdlet. Interestingly abundant I could not amount out a way to abort over the availability ability application the GUI in CTP3, so Powershell is the alone way to I could do this for now which is accomplished by me
Note: Be acquainted the ambience in which you run the Switch-SqlAvailabilityGroup cmdlet. The cmdlet should be run from whichever bulge is activity as the accessory as we will see in a moment:
Running the switch-sqlavailabilityGroup command on the prmiary produces the afterward error:
At aboriginal I anticipation I had configured article incorrectly, but again was able to to failover the availability accumulation through Failover Array Manager. It was again I accomplished this needs to be run from the ambience of the accessory node.
You can abeyance and again resume synchronization of the Always database application the suspend-SqlAvailabilityDatabase and Resume-SqlAvailabilityDatabase cmdlets:
This column has approved the Powershell cmdlets accessible to advice you administer your AlwaysOn configuration. The commands could be acclimated to body a reusable calligraphy to accommodate a constant agreement of AlwaysOn.
My testing was completed on SQL Server CTP3 as I encountered affidavit issues I logged Affix Items. I’ve included a annual of Affix Items below. There are added issues with the affidavit which I did not log because of missing affidavit rather than affidavit bugs. I anticipate not accepting all the affidavit complete is to be accepted while a artefact is still in CTP.
I’ll save my annotation on the AlwaysOn cmdlets for a approaching post, but for now I will say I’m afflicted with the advantage and affluence of use provided by the AlwaysOn cmdlets and SQL Server provider.
Determine Whether AlwaysOn Availability Groups is Enabled
Enable and Disable AlwaysOn (SQL Server) Documentation
Create and Configure an Availability Accumulation (SQL Server PowerShell) Doc Error
New-SqlAvailabilityReplica cmdlt Allows Incompatible settings
Set-SqlAvailabilityReplica Cmdlet Does Not Take Pipeline input
New-SqlAvailabilityGroupListener Advice Archetype Incorrect
Creating a Arrangement Name for AlwaysOn Availability Groups Obsolete
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