William Lam

Super easy way of getting ESXi installation date in vSphere 6.5

10.30.2016 by William Lam // 2 Comments

Sometimes it is the small updates which improves an existing feature or enhances the current user experience that I most appreciate with a new vSphere release. One area that I recently came across while working with vSphere 6.5 is just how easy it is now to retrieve the ESXi installation date which can be useful for troubleshooting or auditing purposes. This previously required you to decode the ESXi UUID which was needed to construct the originally installation date as outlined in this VMware KB 2144905 article.

With ESXi 6.5, you can now quickly retrieve the ESXi installation date simply by using this new ESXCLI command:

esxcli system stats installtime get

Note: ESXCLI can be executed either locally within the ESXi Shell or remotely using vCLI or PowerCLI.

In case that was not enough, the Engineer who added this capability was also kind enough to add a native vSphere API to also retrieve the ESXi installation date from a programmatic approach. Under the existing ImageHostConfigManager there is now a new vSphere 6.5 API called installDate() which returns the installation date in UTC format.

To demonstrate this new vSphere API, I have created a small PowerCLI function called Get-ESXInstallDate which can be downloaded from here.

Here is an example of retrieving the installation date for a specific ESXi host:

How to deploy the vCenter Server Appliance (VCSA) 6.5 running on VMware Fusion & Workstation?

10.27.2016 by William Lam // 31 Comments

As with any new release of vSphere, it is quite common for customers to deploy the new software in either a vSphere home or test lab to get more familiar with it. Although not everyone has access to a vSphere lab environment, the next best thing is to leverage either VMware Fusion or Workstation. With the upcoming release of vSphere 6.5, this is no different. In fact, during the vSphere Beta program, this was something that was asked about by several customers and something I had helped document as the process has changed from previous releases of the VCSA.

In vSphere 6.5, the VCSA deployment has changed from a "Single" monolithic stage where a user enters all of their information up front and the installer goes and deploys the VCSA OVA and then applies the configurations. If you had fat finger say a DNS entry or wanted to change the IP Address before applying the actual application configurations, it would not be possible and you would have to re-deploy which was not an ideal user experience.

In vSphere 6.5, the new UI installer will still allow you to perform a "Single" monolithic stage but it is now broken down into two distinct stages as shown below with their respective screenshots:

Stage 1 - Initial OVA deployment which includes basic networking

Stage 2 - Applying VCSA specific personality configuration

Just like in prior releases of the VCSA, the UI translates the user input into specific OVF properties which are then passed into the VCSA guest for configuration. This means that if you wish to deploy VCSA 6.5 running Fusion or Workstation, you will have two options to select from. You either deploy VCSA and complete both Stage 1 and 2 or just Stage 1 only. If you select the latter option, to complete the actual deployment, you will need to open a web browser to the VAMI UI (https://[VCSA-IP]:5480) and finish configuring the VCSA using the "Setup vCenter Server Appliance" option as shown in the screenshot below.

If your goal is to quickly get the VCSA 6.5 up and running, then going with Option 1 (Stage 1 & 2 Config) is the way to go. If your goal is to learn about the new VCSA UI Installer, then you can at least get a taste of that by going with Option 2 (Stage 1 Config) and this way you can step through Stage 2 using the native UI installer.

One last thing I would like to mention is that there have been a number of new services added to the VCSA 6.5. One example is that vSphere Update Manager (VUM) is now embedded in the VCSA and it is also enabled by default. With these new services, the tiniest deployment size is going to require 10GB of memory where as before it was 8GB. This is something to be aware of and ensure that you have adequate resources before attempting to deploy the VCSA or else you may see some unexpected failures while the system is being configured.

Note: If you have access to fast SSDs and would like to overcommit memory in Fusion or Workstation, you might be able to get this to work leveraging some tricks mentioned here. This is not something I have personally tested, so YMMV.

Here are the steps to deploy VCSA 6.5 using either VMware Fusion or Workstation:

Step 0 (Optional) - Familiarize yourself with setting up VCSA 6.0 was on Fusion/Workstation with this blog post which will be helpful for additional context.

Step 1 - Download & extract the VCSA 6.5 ISO

Step 2 - Import the VCSA OVA which will be located in vcsa/VMware-vCenter-Server-Appliance-6.5.0.5100-XXXXXX_OVF10.ova using either VMware Fusion or Workstation (you can either double click or just go to File->Open) but make sure you do NOT power it on after deployment. (this is very important)

Step 4 - Locate the directory in which the VCSA was deployed to and open up the VMX file and append one of the following options (make sure to change the IP information and passwords based on your environment):

Option 1 (Stage 1 & 2 Configuration):

guestinfo.cis.deployment.node.type = "embedded"
guestinfo.cis.appliance.net.addr.family = "ipv4"
guestinfo.cis.appliance.net.mode = "static"
guestinfo.cis.appliance.net.pnid = "192.168.1.190"
guestinfo.cis.appliance.net.addr = "192.168.1.190"
guestinfo.cis.appliance.net.prefix = "24"
guestinfo.cis.appliance.net.gateway = "192.168.1.1"
guestinfo.cis.appliance.net.dns.servers = "192.168.1.1"
guestinfo.cis.appliance.root.passwd = "VMware1!"
guestinfo.cis.appliance.ssh.enabled = "True"
guestinfo.cis.deployment.autoconfig = "True"
guestinfo.cis.appliance.ntp.servers = "pool.ntp.org"
guestinfo.cis.vmdir.password = "VMware1!"
guestinfo.cis.vmdir.site-name = "virtuallyGhetto"
guestinfo.cis.vmdir.domain-name = "vsphere.local"
guestinfo.cis.ceip_enabled = "False"

Option 2 (Stage 1 Only Configuration):

Step 5 - Once you have saved your changes, go ahead and power on the VCSA. At this point, the guestinfo properties that you just added will be read in by VMware Tools as the VCSA is booting up and the configuration will begin. Depending on the speed of your hardware, this can potentially take up to 15min+ as I have seen it. Please be patient with the process. If you wish to check the progress of the deployment, you can open a browser to https://[VC-IP]:5480 and you should see some progress or you can periodically connect to the Hostname/IP Address and once it is done, you should be taken to the vCenter Server's main landing page.

Virtual NVMe and Nested ESXi 6.5?

10.26.2016 by William Lam // 4 Comments

After publishing my Nested ESXi enhancements for vSphere 6.5 article, I had received a number of questions on whether the new Virtual NVMe (vNVMe) capability introduced in the upcoming vSphere 6.5 release would also work with a Nested ESXi VM? The answer is yes, similiar to PVSCSI and VMXNET3, we also have an NVMe driver for ESXi running in VM.

Disclaimer: Nested ESXi and Nested Virtualization is not officially supported by VMware, please use at your own risk.

To consume the new vNVMe for a Nested ESXi VM, you will need to use the latest ESXi 6.5 and later compatibility (vHW 13). Once that has been done, you can then add the a new NVMe Controller to your Nested ESXi VM and then assign that to one of the virtual disks as shown in the screenshot below.

Next, you would install ESXi 6.5 as you normally would and the NVMe controller will automatically be detected and driver will be loaded. In the example below, you can see I only have a single disk which ESXi itself is installed on and it is backed by the NVMe Controller.

One of the biggest benefit of using an NVMe interface over the traditional SCSI is that it can significantly reduce the amount of overhead compared to the SCSI protocol which in turn consumes less CPU cycles as well as reducing the overall amount of IO latency for your VM workloads. Obviously, when using it inside of a Nested ESXi VM, YMMV but hopefully you should also see an improvement there as well. For those who plan to give this a try in their environment, it would be good to hear what type of use cases you might have in mind for this and if you have any feedback (good/bad), feel free to leave a comment.