Microsoft 2008 Cluster Bugs

Posted on August 17th, 2011 in Operating Systems, Server, Tips | No Comments »

Went through a marathon troubleshooting with my client for the past 1 week to figure out the reason why a cluster failed in place and it could not easily rebuild back after 1 of the node evicted. We had gone through the process to re image both nodes and rebuild from scratch. Follow exactly the best practices and run through the cluster validation without any error. While we try to form the cluster, the system keep provide an unknown error which do not share much information from log. It just keep telling you that the node is not reachable or unauthorized due to security setting.

After few nights of troubleshooting, I was running out of clue. Came to the sudden, I accidentally search the computer name in AD under the category of Users object group, and I found an user account been created in AD with the same name as we define on the cluster name. I was wondering whether this could caused the confuse to the system. Therefore, I was suggesting to remove the user name temporally as it was not use at the moment and tried to reform the cluster. Guess what, the cluster form up as it needed to be in less than 1 minutes. We were so happy to end the marathon troubleshooting every night well and we were also very pissed off with the bugs we face here.

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Microsoft Cluster with Windows 2008 R2 on VMware

Posted on October 3rd, 2010 in Server, Tips, Virtualization, vSphere | 4 Comments »

Just did some test today on building the Windows 2008 R2 Cluster on top of VMware vSphere 4.1. This is my 1st time to configure a Microsoft cluster with windows 2008R2. Read through some best practices guide from VMWare and configure it.  Couple of key things you may wanna take note while building a Microsoft cluster on VMware.

1st is the placement for the 2 node cluster virtual machine, which you should consider split the 2 virtual machine in different host and disable the DRS or vMotion for the cluster node. Now is about the quorum disk and data disk you would like to put in the cluster. You may consider using RDM for either physical or virtual mode, and provide separate SCSI controller for the share disk. You will further require configure the SCSI controller as physical mode allow the RDM to be access by the 2nd node later.

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SQL Native client on vCenter 4 with Windows 2008 64 bits

Posted on April 28th, 2010 in Tips, vCenter | No Comments »

Many of you may had slowly migrated your vcenter to windows 2008 64 bits or R2 recently. As we know, the vCenter server will still require a 32 bit DSN to connect to the 64 bit SQL database even the operating system are currently on 64 bits. You may able to search this on the google easily which suggest you to execute this command odbcad32 from start run to create the 32 bits client, but this may not work actually. I done twice and I hit the same problem as the ODBC console launch are still 64 bits.

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vCenter Services stop after Windows Server rebooted

Posted on March 13th, 2010 in Tips, vCenter, vSphere | No Comments »

You may faced the similar issue by default if you currently running your vcenter server 4 on top of Windows 2008. The reason of the services start up failure are due to the dependency setting require to add in manually.

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1007669

I found the KB above which describe in details about the root cause and solution to over come this.

This issue may occur if the VirtualCenter Server service starts before one of the services it depends on. The VirtualCenter Server service is dependent on the following services:

  • SQL Services
  • ADAM Services (when using linked mode in vCenter Server 4.0)

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Oracle officially supported on VMware Virtualization

Posted on January 16th, 2010 in Announcement, Industry News, Tips, Virtualization | No Comments »

Previously Oracle had decline to provide the official support if you virtualizing your database instance into the VMware virtual infrastructure. Today, there is an official announcement from VMware which confirm the official support from oracle will be provided even you virtualize your database server into VMware.

This is a good news for most of the ERP users especially when you have SAP running in your production environment.

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