Python

An example Python implementation of a kubernetes client that interacts with the CoreWeave VirtualServer resource as well as the kubevirt subresource api.

In this example, Python is used to perform the following actions via the Kubernetes REST API using Bash:

1. Remove an existing Virtual Server.
2. Create of a new Virtual Server based on the my_virtualserver example configuration
3. Wait for a Virtual Server Ready status.
4. Stop the Virtual Server instance and wait until it is stopped.
5. Delete the Virtual Server instance.

Note

In order to work around an unresolved issue with resource paths in the native Python client for kubevirt, we introduced the class KubeVirtClient for basic operations on kubevirt VirtualMachine resources.

Implementation

Follow along by cloning the example script from CoreWeave's GitHub.

The Python example consists of two pieces of code: vsclient and kubevirtclient.

The vsclient provides an interface in the form of helper functions to interact with the Virtual Server resource, while the kubevirtclient provides an interface to interact with the kubevirt subresource API in order to stop and start a Virtual Server.

Both clients can be edited and used as drop-in clients for a simple Virtual Server controller built in Python.

Installation

Example

$
virtualenv -p python3 .venv && source ./.venv/bin/activate
$
pip install kubernetes

Run

Be sure to set secure credentials for your USERNAME and PASSWORD, as they will be used to create a user in your Virtual Server.

Example

$
USERNAME=<my_username> PASSWORD=<my_password> NAMESPACE=<my_namespace> KUBECONFIG=$HOME/.kube/config python3 main.py