Is WSFC (Windows Server Failover Cluster) supported on Azure?
You can find the official support statement at the following location : https://support.microsoft.com/en-us/kb/2721672
Though be aware that there are some considerations…
Requirements for Windows Server Failover Cluster:
- Must Run Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2
- For Windows Server 2012 and Windows Server 2008 R2, KB2854082 is required on all nodes
- Must use a single-cluster IP address resource
- Must use Azure hosted storage using one of the following options:
Application-level replication for non-shared storage
Volume-level replication for non-shared storage
ExpressRoute for remote iSCSI Target shared block storage
Azure Files for shared file storage
- High availability and disaster recovery for SQL Server in Azure virtual machines
- Can be a third-party clustered role
Note Third-party clustered roles are supported by the vendor
Now how do we do this in reality? (Thanks to Thomas for the links)
- Windows Server Failover Cluster on Azure IAAS VM – Part 1 (Storage)
- Building Windows Server Failover Cluster on Azure IAAS VM – Part 2 (Network and Creation)
So what will your challenges be? First of all the storage replication, as it is not possible to share disks between VMs in a read/write manner. After that you should be carefull with your network design due to the different types/levels of IP.
Anyhow, I hope this article helped you on track for your first WSFC deployment on Azure!
4 thoughts on “Is Windows Failover Cluster supported on Azure? YES!”
Thanks for the information. In the above links (Setting up Windows Failover (part 1) : there is no mention of Azure File Service). Can you shed more light on this please.
Objective: Setting up PKI Server in HA on Azure.
For the Azure File Service, best thing is to start here ; https://azure.microsoft.com/en-us/services/storage/files/ Or here ; https://azure.microsoft.com/en-us/documentation/articles/storage-dotnet-how-to-use-files/
It is basically something totally different…
PKI is supported on Azure ; https://support.microsoft.com/en-us/kb/2721672
Then it bares down to the two guides as supplied.
A nice summary. However isn’t listing Azure Files misleading? As if you mount a VHD from Azure Files it is locked to the individual VM. From my understanding that necessitates some other 3rd party block-level replication technology like SIOS.
If I’m mistaken, I’d be happy to learn that you can use Azure Files 🙂
My advice ; Do not use Azure Files (at this time of writing) for HA purposes.
Apart from that, I see it as a candidate for application integration purposes. Not so much for typical the system / infrastructure / operational use cases.
When building a cluster in Azure, you’ll need to look at things like SIOS to achieve a “shared storage” (where it’s synchronized volumes for SIOS actually).