How to Failover the Cluster Group in Windows Server 2008/2008R2

In this short Blog post let us see how to move(Failover) the Cluster Group from one node to other in a Windows Server 2008 Failover Cluster. See here for more details on locating your Cluster Group for your Cluster.

Let’s get into the content! As you can see in the below Screenshot, I’ve my SQL Server running on Node2.

But How about my Cluster Group? I would simply issue “Cluster Group” from my cmd prompt for getting that info. As you can see below my cluster group is running on Node1.

Now, How to Failover the Cluster Group from Node1 to Node2 without any SQL Services Interruptions?

Sol 1 – Using CMD: Simply Issue the below command from your cmd prompt.

Sol2 – Using PS: Simply use Move-ClusterGroup “Cluster Group”. You might get the below Error if you are using Powershell for your Cluster for the First time.

This is because you haven’t imported Cluster Module yet for your PowerShell. You should be good to go once you import Failover Cluster Module. For More Information on Cluster CmdLets please see here.

Btw, There is no way you can do Cluster Group Failover from your Failover Cluster Manager GUI unlike Windows Server 2003!!

Hope this helps!

Cluster Group in Failover Cluster Manager- Windows Server 2008/2008R2??…

Where did Cluster Group go starting Windows Server 2008? Did microsoft really removed the concept of Cluster group starting Win Server 2008??…

If you worked a long time on Windows Server 2003 Clusters, you will definitely know what a cluster group is. In 2003, we used to have a concept called “Groups”. One of the groups which it displays is “Cluster Group”, when you open your Cluster Administrator(Cluadmin). If you are new to clustering,  just to keep it very simple Cluster group is the Core of your Cluster. If your Cluster group is down, basically your entire cluster(all the applications, resources etc) are down.

Things got drastically changed starting Windows Server 2008. Basically we should no longer call it as “MicroSoft Cluster Services(MSCS)“. They renamed it to simply “Failover Cluster Services”. IMHO, this makes it very clear that we are not referring to NLB(Network Load Balancing) – which is one of the flavors of Clustering Services offered by Windows Servers.

Note: Failover Cluster and Network Load Balancing Cluster are completely two different entities, no way related to each other.

Anyways, let’s see where can we see the cluster Group in Failover Cluster Manager in Win Server 2008. Assuming you’ve already Installed FCS(Failover Cluster Service), once you navigate to your Administrative tools and open Failover Cluster Manager(GUI to Manage your Failover Cluster), you’ll see something very similar to the below Screeshot.

Typically we expand our Cluster and navigate to our Services and Applications, Nodes, Networks to manage our SQL Servers! But you are not able to see the actual Cluster Group anywhere as shown in the below Screenshot!

Soooo….where do i get that info!!…

All you’ve to do is to Navigate to the Main Windows cluster and expand Cluster Core Resources(This will be collapsed by default) as shown below.

Once Expanded, you could see something like the below screenshot, where we can see our Cluster Group 🙂

If you are more CMD/PS person, One Simple Way to get the list of all the Groups within our Cluster from CMD is just typing “CLUSTER GROUP” from your Command Prmt! You can see the Below Screenshot from one of the nodes in my Failover Cluster.

As you can see, we still have the Core Concept of “Cluster Group”! Don’t get confused with “Available Storage” being Offline from above Screenshot, It has nothing to with your current allocated SAN Drives(Storage). I Don’t have any extra(additional) storage available in this cluster as of now(See below Screenshot to see what I mean, as you can see all of my drives are allocated to something or other), that’s the reason this is listed as Offline for now, I believe it will appear ONLINE once i create a new SAN Drive and add to this Cluster(Pls. correct me If I’m wrong.)

Soo…the Bottom Line is…We do have Cluster Group Concept, but in stealth Mode 😉