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Recreate a missing VMDK descriptor file April 12, 2016

Posted by General Zod in Tech, VMware.
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I needed to expand the disk sizes on one of my VMs, and encountered an odd problem.  Under the VM Settings, all of the disk sizes were reading as 0 MB.

zero-mb

Honestly, I have no idea what happened, but it seemed that the VMDK descriptor files had disappeared.  I don’t believe that it would have been done maliciously, yet I can think of no reason why it would have “just happened”.  Regardless, the problem exists, so what to do about it?

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VMware VDP Error 10058 April 17, 2014

Posted by Chad in Backup, Tech, VMware.
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Occasionally I’ll start getting VMs that stop getting backed up using VDP 5.5.  They won’t even attempt a backup the next day either.  I’ll kick off an immediate backup which immediately fails, with the error:

An unexpected error occurred with the following error code:  10058.  More information may be available in the client logs which can be downloaded from the configuration application.

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Clear the VDP Error “Operation failed due to existing snapshot” April 3, 2014

Posted by Chad in Backup, Tech, VMware.
3 comments

So you’re deploying the VMware Data Protection product, and one of your VMs won’t backup.  Checking the failed task, you see the error “Operation failed due to existing snapshot.”

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Building a new vCenter onto a Distributed Switch July 10, 2012

Posted by General Zod in Networking, Tech, VMware.
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Normally, I would keep my vCenter on the default Simple vSwitch so that it rides on the same VLAN that the ESXi Hosts exist on.  When you’re planning your environment, it’s always wise to keep the old KISS adage in mind:

Keep It Simple, Stupid!

Well… recently, I had a customer who had separated all of their ESXi Hosts to a dedicated VLAN, and had (due to some remote access rules that were put in place for another customer) placed their vCenter on a separate VLAN accessed via a PortGroup on a Distributed vSwitch which leveraged trunking ports.  This provided a small challenge…

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Copy VM between two vSphere environments February 8, 2012

Posted by General Zod in Tech, VMware.
7 comments

Recently, I had a situation that required me to move a VM from one vSphere 4.1 environment to another of the same release.  The identical vSphere versions was the only thing that these two environments had in common.  They are using different vCenters, different storage, different networks, etc… and security dictated that we could *NOT* link the two environments together.  So how does one move a VM from one unique environment to another?

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Which physical NIC is my VM using? June 23, 2011

Posted by General Zod in Tech, VMware.
3 comments

Recently, I was having an issue in which some of my VMs would intermittently become unreachable across the network.  Looking in vSphere, there were no problems reported with the physical NICs nor with the virtual networking.  Everything was configured OK, so what was the problem?

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Can’t Discover ESXi using EMC Control Center May 15, 2011

Posted by General Zod in Tech, VMware.
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Since VMware has announced that 4.1 will be the last revision of ESX, I’ve started migrating our VMware Hosts to ESXi… and since I’d just acquired a new DL580 G7, I decided that it would be the first ESXi Host.  So when it came time for our SAN Admin to discover the host via the EMC Control Center, we were presented with the following error:

Not able to connect to host <SERVER.DOMAIN.COM>.  SSL certificate verification failed.

EMC support had the answer…

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Update Manager won’t recognize System DSN April 7, 2011

Posted by General Zod in Tech, VMware.
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So today, I took the first step towards upgrading my VMware environment from vSphere 4.0 to 4.1  Namely, I built a new VM that will eventually replace my existing vCenter server, and I installed Windows 2008 R2 Standard 64-bit upon it.  Then, I threw on the SQL 2008 64-bit ODBC drivers, configured the System DSN, and set about installing vCenter as well.  Everything went grand, but then…

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VMware VCB Backup Script March 8, 2011

Posted by General Zod in Backup, Tech, VMware.
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Back in October 2009, my crew at work had implemented VMware Consolidated Backup [VCB] as our solution for backing up virtual machines.  Since it was a command line driven solution, I’d accepted the challenge of scripting a solution to automate the backups.  Now, the solution that was developed may not be the most efficient method out there, but we still leverage the solution today because the more recent VMware Data Recovery [vDR] appliance just is not as reliable as we would like it to be.

I’m going to tell you about the VCB solution that we currently have in-place, and you’re more than welcome to adapt the following for use in your own environment.  However, please keep in mind the following two blurbs…

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Quiescing Issues in VMware for Data Recovery March 6, 2011

Posted by Chad in Backup, Tech, VMware.
2 comments

Last week, we implemented the VMware Data Recovery appliance into our cluster of hosts.  We have had a SAN LUN dedicated to doing backups, and finally got around to using it.  The installation of the VMWare DR appliance is very easy, with just a few key elements to know about. (more…)