Book Image

Serverless Architectures with Kubernetes

By : Onur Yılmaz, Sathsara Sarathchandra
Book Image

Serverless Architectures with Kubernetes

By: Onur Yılmaz, Sathsara Sarathchandra

Overview of this book

Kubernetes has established itself as the standard platform for container management, orchestration, and deployment. By learning Kubernetes, you’ll be able to design your own serverless architecture by implementing the function-as-a-service (FaaS) model. After an accelerated, hands-on overview of the serverless architecture and various Kubernetes concepts, you’ll cover a wide range of real-world development challenges faced by real-world developers, and explore various techniques to overcome them. You’ll learn how to create production-ready Kubernetes clusters and run serverless applications on them. You'll see how Kubernetes platforms and serverless frameworks such as Kubeless, Apache OpenWhisk and OpenFaaS provide the tooling to help you develop serverless applications on Kubernetes. You'll also learn ways to select the appropriate framework for your upcoming project. By the end of this book, you’ll have the skills and confidence to design your own serverless applications using the power and flexibility of Kubernetes.
Table of Contents (11 chapters)
2. Introduction to Serverless in the Cloud

Monitoring a Kubeless Function

When we have successfully deployed our Kubeless function, we then need to monitor our function. This can be achieved with the kubeless function top command. This command will provide us with the following information:

  • NAME: The name of the Kubeless function
  • NAMESPACE: The namespace of the function
  • METHOD: The HTTP method type (for example, GET/POST) when invoking the function
  • TOTAL_CALLS: The total number of invocations
  • TOTAL_FAILURES: The number of function failures
  • TOTAL_DURATION_SECONDS: The total number of seconds this function has executed
  • AVG_DURATION_SECONDS: The average number of seconds this function has executed
  • MESSAGE: Any other messages

The following is the kubeless function top output for the hello function:

$ kubeless function top hello

The output will be as follows:

Figure 7.54: Viewing the metrics for the hello function

Now that we've monitored the function...