Add a kubernetes module for BenchPress

[hattan]

Summary

Initial design should be a wrapper around kubectl. This will result in kubectl being a dependency on this module. However, the design should provide an abstraction so that in the future we can introduce the dotnet sdk for k8s or a powershell sdk if one is created.

Stories

• As a user, I would like to instantiate a new Kubernetes client so that I can fetch data.
  • The ability to use a .kubeconfig file for authorization
  • The ability to use a KUBECONFIG environment variable for authorization
• As a user, I would like to list pods in a namespace.
• As a user, I would like to list namespaces.
• As a user, I would like to list services.
• As a user, I would like to list ingresses.
• As a user, I would like to set up a port-forward tunnel so that the test is able to get to internal Api calls.
• As a user, I would like to verify that a Kubernetes secret exist. Note, this should NOT retrieve the secret value and only ensure that a secret is present in k8s.
• As a user I would like to verify that PVC and PV exist.
• Spike initial Module Surface with stub methods for implementation.
• Design K8sClient abstract interface that will abstract underlying calls.
• Implement Kubectl K8sClient concrete class to interact with k8s.
• Spike dotnet k8s sdk integration with powershell

AC

• BenchPress tests should be able to verify k8s resources (pods, ingresses, services etc)
• BenchPress tests should be able to set up a tunnel into k8s in order to access internal resources via http calls
• Module should target kuberenetes native and avoid any aks specificities.