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Listing all Events for vCenter Server

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I had a conversation with one of our VMware Cloud on AWS field leaders a couple of weeks ago at reInvent on his initial experience with the vCenter Event Broker Appliance (VEBA) Fling. There were lots great feedback but one thing that stood out to me which looks to have been a barrier to getting started was being able to figure out a specific vCenter Event and its respective identifier. Although the list of "default" vCenter Events are documented in the vSphere API, it is definitely not the first place most folks would go to look nor is it very intuitive to browse.

To be honest, this is not a unique ask for VEBA. I have also seen this requests come up from customers who are automating vCenter Alarms, which can also be based off of vCenter Events and the same question has come up on before. One challenge with such a request is that the number and the types of vCenter Events will vary from customer to customer depending on the number of 2nd and 3rd party solutions deployed, not to mention it will also vary from version to version. In addition, as a customer, you can also publish your own custom Events into vCenter Server which makes this difficult to provide a single list that would cover all possible scenarios.

Ultimately, this ask is completely valid and I started to look at the vSphere API to see if there was something that could help. It did not take look before I stumbled onto the EventDescription which is part of the EventManager, which provides a nice registry for all currently registered vCenter Events. Time for some Automation 🙂

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Configure NSX-T Enhanced Data path / Network Stack (ENS) for Nested ESXi

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After publishing my Running Nested ESXi, NSX-V or NSX-T on top of NSX-T article which actually turned out to be quite popular, I received an interesting question on whether ENS for NSX-T could also be configured within a Nested ESXi deployment? I was a little familiar with ENS, which I will explain in a second. However, I was not completely sure about the benefits of running ENS in a Nested environment.

With the help from my friend Frank Escaros-Buechsel, who actually works in our NFV group at VMware. Frank helped validate the instructions but he also provided some additional insights on why this could be useful in a lab setup for verifying configuration and behaviors when additional tuning maybe required. If you are NOT running NFV-based workloads, ENS is not something you need to configure when running NSX-T using Nested ESXi.

So what is ENS?  Enhanced Network Stack (ENS) also referred to as Enhanced Data Path is an NSX-T capability which was first introduced with NSX-T 2.3. ENS is specifically designed for Network Function Virtualization (NFV) workloads that require a high performance data path. Such workloads include Telco, 5G and IoT based deployments where improved packet throughput is critical for the responsiveness of these applications.

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Customizing vCenter Alarm Email Subject and Body

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One of the automated actions that can be configured when a vCenter Server Alarm is triggered is to send an email notification. Over the years, I have seen a number of requests and questions about customizing the email and whether an email template exists. I personally have not used this feature much which has been around since the introduction of vCenter Server and mainly because I have always worked in an environment where we had dedicated monitoring tools that provide notifications including emails.

Most recently, I noticed an increase number of questions around this topic and I was curious on whether a solution exists today or if this is still a gap today? A quick Google search landed me on this 2013 VMTN thread which included several workarounds that customers have found. However, the only viable "supported" and "persisted" option at the time within that thread was to use the vSphere API/PowerCLI to customize the alarm action.

While going through this exercise myself, I found that our vSphere UI has had some enhancements since that 2013 thread and I thought it was worth sharing an update in 2019 on how customers can customize both the email subject and body for vCenter Alarms. One thing to note is that there is no generic email template that can be edited, the email customizations are applied on a per-Alarm action basis and this is applicable for both vCenter Server running in a traditional on-premises environment as well as for VMware Cloud on AWS or Dell EMC.

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