In this case you don’t need a shared disk to create a Windows Server Failover Cluster for Always On Availability Groups. In traditional clustering you would have needed a shared disk, configured through the clustering setup. Windows Server 2008 and higher provided the option to use a file share witness as a quorum configuration. This will be set up in a later stage though. I have combined SQL Binaries and TempDB in one disk.Įach environment is different and may require different features to be installed.īefore we start installing the Failover Clustering, we need to first choose a server in which will host our File Share Witness. This could be standardised through the use of Group Policies.Ī quick note on how I have provisioned my SQL Server disks. These accounts should have “Log on as a Service” permissions. Note: It is recommended to create gMSA accounts for both SQL Server Agent service and SQL Server Database Engine service. Install-WindowsFeature Net-Framework-Core Īfter the SQL Server VM has joined the domain, start with the installation of SQL Server 2014 Enterprise. Once your SQL Server has been created, join it to the domain. Your disks should have the same letters assigned to them, in both SQL Servers. You could choose a “Standard” Disk type for backup. A good example for naming a disk might be “VMName-Data01”. When deleting a VM, your disks remain and are not deleted with the VM (unless the storage account or resource group is deleted). Should you delete the VM, you might need to re-attach the disks to a new VM. Note: Name your disks in a way you’d recognise. When creating disks, you would need to configure them as follow – Assuming you’re creating one disk for each SQL service. Combining disks will also give you a better performance and a higher IOPS. If you need more than 1024Gb (1TB) of disk, you would need to create multiple disks, and create a storage pool and a VHD in Windows Server 2012R2 to combine those disks into one, since Azure gives you a maximum of 1024GB of disk space. While creating your SQL VM, choose the availability set you have created in step 1. For dev/test workloads, you could go with Standard disks rather than Premium. Also too, choose your disks to be Premium disk. In Azure, select your defined Resource Group, and click “Add”, choose Windows, and then select Windows Server 2012R2.įor a production, it is best to choose a DS3 type VM, for larger environments, choose F8. In Azure’s sidebar click on “New” and search for “Availability Set”, Create your availability set with a name that makes sense to you, e.g. More on Availability Sets and best practice could be found here. Also too, Microsoft always takes the possibility of a risk that a rack might go down. Microsoft from time to time performs planned maintenance for Azure, although there’s no direct impact on VMs, some VMs might need to be rebooted to complete the update. A rack usually consists of power equipment, network equipment, etc. When you place two or more VMs in an availability set, the VMs will be deployed in two different racks. In AzureRM, adding a VM (after it’s been created) to an Availability Set is not supported as of this writing.Īvailability Sets are a set of racks, and racks of servers. Note: It is important to create an Availability Set before provisioning a VM. 2x DS3_v2 servers for installation of SQL Server 2014 Enterprise Editionīefore deploying a SQL server VM in Azure, you will need to create an availability set (this is to be used with the Azure Internal Load Balancer (ILB) at a later stage and also to protect your VMs from a single point of failure.1x File Server (Used for file share witness).It also assumes that you have basic SQL knowledge and have established your Domain Controller running on Windows Server 2012 R2. This blog assumes that you already have basic knowledge of Azure infrastructure services and that you have created your Azure subscription, and configured the Resource Group, Storage account, VNET, and subnets. In this blog I will discuss how to setup an Always On Availability Group in Microsoft Azure. From the assignment of IP addresses through to load balancing across listeners, special consideration needs to be taken in order to establish a functional SQL environment. While Azure offers an Infrastructure as a Service capability, the mechanisms used to setup many of the requirements for an Always On Availability Group are different to those in a traditional environment. This powerful capability ensures your databases are synchronised through one or more replicas (SQL Servers). Starting with the release of SQL Server 2012 (Enterprise Edition) Microsoft introduced “Always On Availability Groups”. The most challenging aspect of managing data for any organisation is high-availability and disaster recovery. Almost all organisations rely on data, be it in the form of files or databases (SQL, Oracle…).
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