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June 2004

Start Clustering!

Even small organizations can benefit from high-availability clusters
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SideBar    iSCSI Essentials

You'll use the workstation to view and create text files and play the MP3 file from the server. You can run the Dcpromo utility on the DC system to promote it to a DC and to create the forest and domain. You can add the workstation to the domain, but don't add the two high-availability servers yet.

Now use the SCSI Y cable to attach the SCSI disk to the SCSI cards in the high-availability computers. Make sure your SCSI disk isn't receiving power from either of the high-availability computers.(One of the tests you'll perform later is to pull the power plugs on the high-availability boxes.) Remove the SCSI disk's terminator, and make sure the SCSI cards have termination enabled. Most SCSI disks have the ID set to 0, which is fine. However, you'll probably need to change the ID of one of the SCSI cards. By default, SCSI card IDs are set to 7. Change one to 6 and leave the other at 7, or both cards will be on the same SCSI bus and you'll have a conflict. Power on the high-availability computers one at a time to verify that each one can "see" the attached SCSI disk.

Add both high-availability servers to the domain and give them names that are meaningful to you. I named my two servers d34 and d35 and my domain dog.attbi.com. Finally, create a user account for the cluster. I called my account CSerAct-1 (which is a shortened version of Cluster Services Account-1) and gave it local administrator privileges. On the user account, make sure that the User must change password at next logon option is cleared and select the Password never expires option.

Creating a Cluster and Adding Nodes
To create a high-availability cluster, you first create, or name, the cluster. Next, you add servers, or nodes, to the new cluster. Third, you associate a resource, such as an application or service, with the cluster. The entire process should take about an hour to complete.

  • Start with one of the high-availability servers powered off and the other powered on. On the powered-on server, click Start, Administrative Tools, Cluster Administrator.
  • Make sure that Create new cluster is selected in the Open Connection to Cluster drop-down box, and click OK to start the New Server Cluster Wizard. Click Next.
  • Confirm that your domain is selected, and name your first cluster. I used the name Cluster-1. Click Next.
  • The next screen asks for the computer name—supply the name of the first high-availability server. Click Next.
  • Microsoft Cluster services now analyzes your configuration, as Figure 2 shows. This process begins automatically and should take only a minute or two. When it's finished, look at the log file so that you'll have some idea which settings Microsoft Cluster services checked.
  • At the next screen, enter a valid unused IP address on your public network for management tools (this virtual IP address isn't the address of the high-availability server). Click Next.
  • Enter the name of the cluster user account (in my case, CSerAct-1). This account is given local administrator privileges on all nodes in the cluster. Click Next.
  • The wizard now displays the Proposed Cluster Configuration, which is a summary of your selections. Click Next.
  • Microsoft Cluster services creates the cluster, and Cluster Administrator gives you another opportunity to view the log file. Click Finish to close the wizard.
  • Take a few moments to explore Cluster Administrator and its menus.

We've now created a one-node cluster. To add the second node, select Add nodes to cluster from the Open Connection to Cluster drop-down box to start the Add Nodes Wizard. This wizard takes you through the same steps as the New Server Cluster Wizard. When asked for the computer name and IP address, supply the name and address for the second high-availability server. (Alternatively, you can select New, Node from Cluster Administrator's File menu to add the second node.) Figure 3 shows a two-node cluster in Cluster Administrator.

Creating a Cluster Resource
Now that we've created a cluster, the next task we need to perform is to associate a resource with the cluster. A resource can be a file share, a print spooler, DHCP, WINS, or an application such as Exchange or SQL Server. To create a high-availability file share resource on the SCSI disk, we must create a group, a physical disk resource, an IP address resource, a network name resource, and a file share resource, then bring the file share resource online

To create a group, complete the following steps:

  • On either cluster node or on the DC, open Cluster Administrator and connect to your cluster.
  • Under one of your nodes, right-click Active Groups and select New, Group.
  • On the first screen of the New Group Wizard, give the file share group a name (I use FileShareGroup-1) and give it a description. Click Next.
  • As the resource owners, select your two high-availability servers and assign their priorities (i.e., the order in which they should run). Click Finish.

To create a physical disk resource, complete the following steps:

  • Right-click the group you just created, and select New, Resource. (This resource and others will be part of the newly created group.)
  • Enter a name and description for the physical disk. For the Resource Type, select Physical Disk, and for Group, select the group that you just created (FileShareGroup-1). Click Next.
  • As the owners, specify the two cluster nodes. Click Next.
  • Don't specify any dependencies. The physical disk isn't dependent on any other resources. Click Next.
  • At the next screen, select the drive letter you want to assign to the high-availability file share. Click Finish.
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Reader Comments
I found the article very interesting and wanted to create a test lab following your instructions, but getting a scsi "Y" cable has been imposible, which means that if I ever do find one will be unafordable. Any suggestions? or tell me where you got yours for you test.

dzoquier July 23, 2004 (Article Rating: )


I've tried to follow the article's steps, but I get stuck during the Create Physical Disk - wizard. The "Disk Parameters" windows (the last window in the wizard), has no options to choose, so the Finish button is grayed out. Any ideas?

tkm August 03, 2004 (Article Rating: )


I agree with dzoquier, almost impossible to find a scsi Y cable. Has anyone been able to setup clustering in this way? If yes, what hardware? Thanks,

patrickgraham August 09, 2004 (Article Rating: )


Doug implies we can use any Windows compliant box for the MSCS (high availability) nodes. However, MS states “Microsoft Product Support Services (PSS) supports only server clusters on hardware that is listed on the… Cluster WSC for Windows 2003 Server.” (http://support.microsoft.com/default.aspx?scid=kb;en-us;309395&Product=winsvr2003). The Cluster WSC is found at http://www.microsoft.com/windows/catalog/server/default.aspx?subID=22&xslt=categoryProduct&pgn=8b712458-b91c-4a7d-8695-23e9cd3ae95b & lists only hardware bought as a cluster from major vendors, which gets into some major $$. Am I missing something?

dingram October 07, 2004 (Article Rating: )


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