Software Engineering Daily

Containers have improved deployments and resource utilization. Kubernetes created a platform to manage those containers and orchestrate them into distributed applications. In today’s episode, we explore tools that improve the workflow of the application developer who is working with Kubernetes, including Helm, Draft, and Brigade.

Helm is a package manager for Kubernetes, which allows users to find, share, and use software that is built for Kubernetes. The unit of installation for Helm users is a Helm Chart. Installing a Helm Chart can simplify the deployment of a database, load balancer, or continuous integration tool. Draft is a tool for simplifying the containerization process. When a developer runs Draft, a Dockerfile is created to containerize the application, and a Helm Chart is created to enable the application to be easily deployed.

Brigade is a tool for creating and running Kubernetes workflows. Brigade allows for event-driven scripting on top of Kubernetes. Chatops, continuous integration systems, and complex big data pipelines can all be defined with Brigade. Brigade is exciting because it is a higher level tool on top of Kubernetes–in some ways similar to the “serverless on Kubernetes” systems we have covered in the past.

Ralph Squillace is a principal program manager with Microsoft, where he works on containers, Linux, and cloud products. Ralph joins the show to talk about how developing with containers has changed in the last few years, and how it will continue to evolve in the near future.

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Deploying software to a container presents a different security model than deploying an application to a VM. There is a smaller attack surface per container, but the container is colocated on a node with other containers. Containers are meant to have a shorter lifetime than VMs, so there are generally fewer consequences if a container needs to be destroyed and rebuilt due to a potential security vulnerability.

Maya Kaczorowski works on container security at Google. In a recent talk at KubeCon, Maya discussed the runtime security of containers on Kubernetes. Maya joins the show to discuss container security, and what it means to software developers and operators.

Maya also gives guidelines for evaluating the security of your own cluster. We talked about the security benefits of a managed Kubernetes provider and also explored how some container security vendor software works.

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Voice interfaces are a newer form of communicating with computers. Alexa is a voice interface platform from Amazon. Alexa powers the Amazon Echo, as well as Alexa-enabled cars, refrigerators, and dishwashers. Any developer can build a device with a voice interface using a Raspberry Pi.

Paul Cutsinger works on Echo and Alexa at Amazon. He’s focused on growing the market of developers who are building voice interfaces. In this episode, Paul describes how to design and implement a voice application for the Amazon Alexa platform.

The market for voice powered apps is so new, and there has yet to be a “killer app.” If you like to tinker on new platforms, you will like this episode–and I was surprised by how easy it sounds to build a voice app.

Personally, I use voice interfaces all the time–to set timers, to find out how to tell if a cucumber has gone bad, to ask what temperature to cook a potato at. Sometimes, when I am lying in bed trying to get to sleep, I will ask my nearest device to read me a Wikipedia article. These are great use cases, but I’m sure we will see something much more groundbreaking in the future.

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Gloo is a function gateway built on top of the popular open source project Envoy. The goal of Gloo is to decouple client-facing APIs from upstream APIs. Gloo is similar to an API gateway, which is a tool that software companies can use to collect all their APIs and one place and impose security, monitoring, and other standards around those APIs.

The goal of Gloo is to provide all the tools necessary to glue together traditional and cloud-native applications. Idit Levine is the CEO of Solo.io, a company that is building Gloo and several other projects.

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Mesos is a system for managing distributed systems. The goal of Mesos is to help engineers orchestrate resources among multi-node applications like Spark. Mesos can also manage lower level schedulers like Kubernetes. A common misconception is that Mesos aims to solve the same problem as Kubernetes, but Mesos is a higher level abstraction.

Ben Hindman co-founded Mesosphere to bring the Mesos project to market. Large enterprises like Uber, Netflix, and Yelp use Mesosphere for resource management. Before he started the company, Ben worked in the Berkeley AMP Lab, a research program where the Spark and Tachyon projects were also born.

At this point, he has spent significant time in both academia and industry. This conversation spans distributed systems theory, history, and practice. Ben and I spoke at KubeCon 2018 in Copenhagen–which was an amazing conference. We were both amazed at how big the audience for Kubernetes has gotten, and the pace at which the technology is advancing.

Today, Kubernetes is mostly used for scheduling containerized applications that engineers have built themselves. But there will be higher level tools that use Kubernetes as a building block. Much like Zookeeper was used as a building block for Hadoop, Kubernetes will be used to build serverless applications and distributed databases.

Once you are using a distributed database built on Kubernetes, you don’t want to think about the container orchestration–you want to think about the raw storage and CPU requirements for that database. This is one reason why Mesos is so compelling. Since Kubernetes creates an increased cardinality of distributed systems, it’s good to know that there is a framework built to manage those higher level applications.

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