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Useful Interactive Terminal and Graphical UI Tools for Kubernetes

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I recently ran an internal hands-on workshop where I demonstrated to our field, marketing, support and engineering on just how easy it is to deploy and manage Tanzu Kubernetes Grid (TKG) Clusters running on VMware Cloud on AWS. While developing the lab which has been several weeks in the making, I did not want to assume everyone was familiar with Kubernetes (K8s) and as part of the workshop, I thought it would be useful to include some additional utilities that would provide a better lab experience for those that are just getting started in their K8s journey.

I included tools like bat, kube-ps1 and Octant as an example and the weekend before the workshop, I came to learn about a really neat terminal-based UI tool called kubelive and I knew I had to include that in the workshop. Interestingly, after the workshop, several folks shared with me that they had not heard of this tool either and others on Twitter had the same feedback. Given the level of interests with K8s in the VMware community, especially with the launch of vSphere with Kubernetes (Project Pacific), I thought it might be useful to share some of the terminal-based and graphical UI tools that I had been evaluating and learning about.

As of writing this blog post, my current two favorites is Octant for a graphical-based UI (browser) and K9s for a terminal-based UI.

Octant

Octant is a browser-based UI aimed at application developers giving them visibility into how their application is running. I also think this tool can really benefit anyone using K8s, especially if you forget the various options to kubectl to inspect your K8s Cluster and/or workloads. Octant is also a VMware Open Source project and it is supported on Windows, Mac and Linux (including ARM) and runs locally on a system that has access to a K8S Cluster. After installing Octant, just type octant and it will start listening on localhost:7777 and you just launch your web browser to access the UI.

One thing I really like about Octant is how easy it is to switch context between different K8s Cluster with a simple drop down along with namespace filtering which is quite helpful in narrowing down a specific deployments, usually for informational or troubleshooting purposes.


Most of my workflows generally involves a specific K8s pod and the Resource View tab is super handy to give me a quick overview of the different resources that is associated whether that is a deployment, secret, service, etc.


The YAML tab beats using cat and bat, especially for really large and complex deployments and you can search right in the browser.
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Forwarding vCenter Events into AWS EventBridge using vCenter Event Broker Appliance

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After attending Mike Deck's AWS reInvent session last year on Building event-driven architectures faster than ever with Amazon EventBridge, I could not help but draw a number of parallel concepts between AWS EventBridge and our recently released vCenter Event Broker Appliance (VEBA) Fling. I thought it was a very interesting solution and certainly wanted to give it a try as I think it could really benefit some of our customers, especially for those already using our VMware Cloud on AWS solution and being able to take advantage of the various AWS Services in an event-driven fashion.


In fact, one of the use cases that I had in mind was one that we had from a VMware Cloud on AWS customer who wanted to take a vCenter Event and forward that off to AWS CloudWatch. The solution that I had shared last year was utilizing our vRealize Log Insight Cloud solution which is integrated into VMware Cloud on AWS and leveraging its webhook functionality to call into a AWS Lambda function which would then process the payload directly into CloudWatch. Although this solution works and I know several customers who have implemented something similiar, I think EventBridge could certainly provide a more flexible way to integrate not only with CloudWatch but almost any AWS Service or 3rd party service.

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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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