Category Archives: VMware

vCloud Director 9.5 Hands On

vCloud Director 9.5 was released a few weeks back and it’s now time to look into upgrading as well as testing it’s new features such as the new Photon 2.0 appliance, NSX-T integration as well as the new HTML5 UI. vCloud Director lists one of the new features being feature parity of the HTML5 UI […]

“A problem occurred while getting data from the source vCenter Server” error when upgrading to vCenter Server Appliance 6.7 U1

Seeing that vSphere 6.7U1 was recently released, I decided to upgrade my VCSA 6.5 appliance to 6.7U1. Downloaded the installer ISO, extracted the ISO to a temp folder then ran the installer wizard. I then launched the installer, select the “upgrade” option and put in the details of my existing vCenter credentials and ESXi host […]

VMware Cross vCenter vMotion migration with separate SSO domains

I recently deployed a new vCenter 6.5 VCSA due to my adoption of a new hyper-converged stretched cluster. Similar to mine, there would be scenarios where you would need to deploy a new vCenter appliance rather than upgrading/migrating an older vCenter server. Now that I have built and configured my new VCSA and configured my […]

Cisco HyperFlex Stretched Cluster Performance Testing – HCIBench

I previously performed some performance testing of my new HyperFlex Stretched Cluster using IOMeter. The feedback that I received from some readers was that IOMeter is an “outdated” tool which was used to measure performance of old storage systems and is no longer suitable for new hyper-converged platforms. Therefore, I ran another performance test using […]

August 2018 Intel Vulnerabilities L1 Terminal Fault – L1TF (CVE-2018-3646 / CVE-2018-3620 / CVE-2018-3615)

Summary Following the recent Spectre/Meltdown vulnerabilities from Intel, the latest wave of new found vulnerabilities disclosed by Intel on Tuesday, 14 August includes 3 new vulnerabilities affecting Intel Core and Xeon processors from at least 2009 – 2018. These new vulnerabilities are collectively known as “L1 Terminal Fault”. Vulnerability Overview Details for each vulnerability as […]

HyperFlex VM with Native VMware Snapshots VM not responding issue

I recently encountered an issue performing a snapshot-based VM backup using Avamar with the nested vCenter VM inside a HyperFlex cluster. This issue occurs when using native VMware snapshot backups and NFSv3 datastores. The issue is more prevalent with nested vCenter on HyperFlex with VMware as HyperFlex presents the storage as NFSv3 datastores to the […]

VMware VCSA 6.5 Permissions and Active Directory Groups Not Working

I recently deployed VCSA 6.5U2 with embedded PSC and selected Active Directory (Windows Integrated Authentication) as the identity source. All the required steps were carried out, joining the VCSA to Active Directory, rebooting the VCSA then adding the AD identity source with using the machine SPN. I could successfully query and add users and group […]

VMware Spectre Variant 2 CVE-2017-5715 with cpu microcode fix released!!

I noticed that my ESXi hosts had new patches today and apparently VMware has finally released the patch for Spectre Variant 2 CVE-2017-5715 version 2 which utilizes the new updated CPU microcode patch listed in VMware Security Advisory vmsa-2018-0004.3. A colleague of mine illustrated the requirements similar to the one below which I found interesting and easy […]

VSAN Deduplication – what they don’t tell you

I was asked about deduplication ratios for VDI today which brought back some memories from when I deployed a VSAN cluster a few months ago. It was a VSAN all-flash cluster (mentioned in my previous blog post) which I enabled deduplication and compression. I used Zerto to migrate some VMs for testing and found that […]

Zerto issue with VMware VSAN – Zerto-migrated VMs unable to perform snapshot or clone

I recently used Zerto migrate VMs from an old vSphere 5.0 cluster into a new VSAN 6.6 cluster. The VMs started up fine but I found that I could not perform any disk related functions such as snapshots or clones to the migrated VMs. All VMs that were manually created on the VSAN 6.6 cluster […]