High availability referring to make sure that services are available even one or more servers goes down and disaster recovery means keeping services going in the event of a natural or human caused disaster and preserving as much data from before the disaster as possible.
Skype for business server providing the high availability options in Front End as pool pairing as well as high availability options are in Back End servers such as database mirroring, Always On availability groups, SQL fail over clustering, Always On fail over cluster instances (FCI).
Worked on a project for Skype for Business deployment with one of mu customer, and want to share my experience through this post. In this post my main focus on configuring the SQL Server AlwaysOn Availability Group for Skype for Business.
Before StartingAs always we have to go through the prerequisite, following are the recommendation from Microsoft
Server requirements for Skype for Business Server 2015
Back End Server high availability in Skype for Business Server
Windows Failover ClusteringFollowing are the recommendation for configuration of the Windows Failover Clustering
Failover Clustering Hardware Requirements and Storage Options
Understanding Requirements for Failover Clusters
IPs Address and DNS
First of all we need to do ensure that our SQL nodes are configured on the customer LAN and domain joined.
Next we need to decide the IP addressing for the SQL availability group, we need IP address for SQL AlwaysOn Group listener and DNS name for SQL AlwaysOn Group listener.
Service AccountsAgain we have to follow the best practice to use Active Directory Service Account where possible.
Network ConfigurationFirst we have to configure the Network for public and private network card on both SQL servers.
Windows Failover ClusteringNow time to install the Windows Failover Clustering role on servers, we have two option, first you can run the PowerShell command
and 2nd option from GUI
Once complete we can see the "Failover Cluster Manager" in server tools
Now time to create failover cluster, open from console of failover cluster manager
Select Create Cluster
Brows the both nodes from Active Directory and click on add
Next wizard for validating the cluster configuration test before continue, i have selected Yes
Now it will start validating the configuration
Select "Run all Test"
next wizard ready for test configuration
wizard is running for validating the configuration
here is the validation report for cluster configuration.
Next wizard you have to give the Cluster IP address and Cluster Name
next we have to make sure uncheck on "Add all eligible storage to the cluster" and press Next to continue
Once Windows Server Failover Cluster now created and we can get the warning regarding Quorum witness, we can ignore now as we will define latter also we can view the report
Now we can see all the details from Failover Cluster manager Console
Now we have to define the Quorum\Witness folder and permission.
Now create the Cluster Quorum from Failover Cluster Manager
Quorum cluster configure wizard will give all details, click Next
here we have option to select the Quorum witness
Next brows and select the file share witness
Now we can see the both nodes are online from Failover Cluster manager console
Now we see the completed the installation and configuration of the Windows Failover Cluster, In next part 2 we will start SQL installation and configuration.