The ramblings of a computer geek
I had an issue where I could not vMOTION a powered off Virtual Machine. This virtual machine was quite large 1.2TB in total of disks attached. The VM was powered off and needed to be moved to some archive storage all on VMFS. When attempting to move it would start moving and after around 50 … Read more
PROBLEM As part of a storage replacement programme, we had migrated all our VMs off the NFS datastore. When attempting to unmount the datastore from the host(s) we where given this error: Call “HostDatastoreSystem.RemoveDatastore” for object “datastoreSystem-122544” on vCenter Server “vcenterFQDN” failed. An unknown error has occurred. Checking the /var/log/vmkernel.log on the host we saw … Read more
When attempting to migrate a VM from VMware ESXi 5.5. to ESXi 6.0 U1 you may experience problems, this does not affect all VMs only some and they are typically VMs that have been backed up using an external backup tool and make use of CBT (Change Block Tracking). A bug within ESX 5.5 or … Read more
If you need to test connectivity between two VMKernel ports VMK’s you can use the following command: If you have seperate IP stacks for different types of VMkernel ports you need to add this stack name to the command too:
After an upgrade to ESXi 5.5 from ESXi 5.1, all the networking on the host stopped working, as I had already upgraded other BL490c G7 blades with (seemingly) identical hardware but upon upgrading this one the NICS were detected but there was no connectivity through the chassis, the flex-10 to the host. All checks on … Read more
Problem: When trying to deploy an OVF using the web interface, you getting this error message below. Even when you have installed the client integration plugins it still doesn’t work. “Client Integration Plug-in must be installed to enable OVF functionality” Solution: 1. Uninstall any/all existing Vmware client integration plugins from: Control Panel->Add/Remove Programs 2. Restart … Read more
Had an issue where a VM would not migrate to another node within the Nutanix cluster, getting this error message after about 21%. To resolve this I used: https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1031636 even though this is for version 4.x this worked for VMware 5.5. On the host under advanced settings change this setting: Migrate.VMotionResolveswaptype = 1 Change the … Read more
When attempting to add a VMWare vCenter Server Appliance to our Active Directory I encountered this error message: “Error: Invalid Active Directory Domain”. Within the /var/log/vmware/vpx/vpxd_cfg.log log file I was seeing the following: It would seem that the root record for the domain is missing, this should resolve to a domain controller, so it has … Read more
Seems on the face of it to be something that you can find in the GUI, but its not quite that easy! Based on this link: https://psvmware.wordpress.com/2013/07/04/where-are-virtual-machine-templates-located/ You can find it out by running the following, this will provide you with the name of the template, the host it is currently on and where the … Read more
VMWare TPS (Transparent Page Sharing) is a mechanism within the hypervisor to allow the saving of RAM by allowing virtual machines where their memory matches to only store a copy of the memory used once. I.e. If you had 5 Windows 2012 R2 virtual machines running, they are going to be almost completely identical, so … Read more