kubeobject

KubeObject

A simple to use wrapping on top of Kubernetes custom resources with object oriented semantics.

KubeObject allows you to use Kubernetes Custom Objects in an object oriented way. It works by defining an object, by instantiating it with a name and namespace and then "bounding" this object to a Kubernetes object by creating it, or loading it, if it already exists.

Quick Start

In the following example we create an "Istio" object, which will manage one of the Custom Objects defined by the Istio operator. A simple lifecycle is explained below.

# Builds the object, but it is "unbound", this is, it is not
# referring to an actual object in Kubernetes.
istio = CustomObject("my-istio", "my-namespace", plural="istios", api_version="istio.banzaicloud.io/v1beta1")

# Let's pass the simplest spec we can
istio["spec"] = {"version": "1.1.0", "mtls": True}

# And now create it; after creation the object is "bound"
istio.create()

Updating the object's Spec and checking the object's Status is one of our goals as well, like in the following example:

# The Istio operator should have started working on deploying
# this new Custom Resource. Let's get the status of the object
print(istio["status"])

# This is empty, because since calling `create()` we have not
# updated from the actual object in Kubernetes. Let's get an
# up-to-date object.
istio.reload()

# I want to avoid calling `reload()` everytime I need a new
# version
istio.auto_reload = True

# Now we'll wait until the object has reached a given status:
while istio["status"]["Status"] == "Reconciling": time.sleep(5)

# Check the Status after "Reconciling"
print("Our status is:", istio["status"]["Status"])

After doing all its work, the Istio object might need to be deleted:

istio.delete()