A. Mikkelsen

VMware ESX scripts, commands, tools and other nice to know things that will make your virtualization days easier!!!!

Browsing Posts in vSphere (ESX)

If you ever need to clear the list of ignored SSL certificates (hosts or vCenters) that you use from the VIclient. Open the “Registry Editor” Locate the key named “HKEY_CURRENT_USER\Software\VMware\Virtual Infrastructure Client\Preferences\UI\SSLIgnore” Delete all certificates needed.  

When connecting some storage systems to vSphere, vSphere sometime doesn’t select the most optimal multipathing policy. I came across the above problem when adding an EMC VPLEX storage system to a  large vSphere 4.1 installation. vSphere selected the Fixed path multipathing policy. In smaller environments this isn’t normally a problem , but when a Fixed policy is selected in […]

Yesterday I was supposed to receive last months billing reports from our vCloud Director environment. But for some reason this didn’t happen 🙁 I tried to logon to the VCCB web front end, but that wasn’t possible – the page just timed out. Then I checked the VCCB  services and all was running. Just to be sure […]

In April VMware released their hardening guide for vSphere 4.1 (http://communities.vmware.com/docs/DOC-15413) , now the have also released a free tool to check your vSphere installations against their hardening guidelines. The tool is called “VMware Compliance Checker for vSphere” – http://www.vmware.com/products/datacenter-virtualization/vsphere-compliance-checker/overview.html

If you have your hosts connected to a Cisco network infrastructure, you can see a hosts CDP information directly from within the VI Client. As you can see in the exampels below it’s quite impossible to get the full CDP picture if you have many hosts with multiple NICs. So I created a script that […]

After I upgraded vSphere vCenter & Client to 4.1 258902, I been getting an error in the vSphere Client. A internal error occured in the vSphere Client. Details: Object reference not set to an instant object. The solution is provided by VMware. http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1033560 It’s just replacing a DLL file 🙂 The error is only with […]

When you upgrade your vSphere environment you normally also upgrade the VM’s virtual hardware to version 7, to take advantage of the new features. This is pretty normal procedure for all VMware admins. But in some very very rare cases you might need to move a VM upgraded to hardware version 7, to a host […]

Using IBM Blades and Cisco switches to run your ESX enviroment? If yes, have you tested what happens if you unplug the network cables going into one switch? If you like me have bundled 2 or more cables going from one switch, to one backbone switch and done the same for the other switch, then […]

After we upgraded to vSphere 4.1, the SCSI adaptor of all our WINXP guests changed from LSI Logic Parallel  to BusLogic Parallel. This change should normally not create any warnings or problems it VMware Tools are up to date. But after the upgrade all our WINXP guests got the following warning when powered on in […]

After we upgraded to vSphere 4.1 we have been expirence problems with VM’s entering FullScreen mode. The issue is that 9/10 times a VM enter FullScreen mode, you are not able to move the mouse to the bottom part of the screen and select a program or the Start option. VMware is aware of the […]