Features

• HTTP interface using requests using kubeconfig for authentication

• Python native querying of Kubernetes API objects

Installation

To install pykube, use pip:

pip install pykube

Usage

Query for all ready pods in a custom namespace:

import operator
import pykube

api = pykube.HTTPClient(pykube.KubeConfig.from_file("/Users/<username>/.kube/config"))
pods = pykube.Pod.objects(api).filter(namespace="gondor-system")
ready_pods = filter(operator.attrgetter("ready"), pods)

Access any attribute of the Kubernetes object:

pod = pykube.Pod.objects(api).filter(namespace="gondor-system").get(name="my-pod")
pod.obj["spec"]["containers"][0]["image"]

Selector query:

pods = pykube.Pod.objects(api).filter(
    namespace="gondor-system",
    selector={"gondor.io/name__in": {"api-web", "api-worker"}},
)
pending_pods = pykube.objects.Pod.objects(api).filter(
    field_selector={"status.phase": "Pending"}
)

Watch query:

watch = pykube.Job.objects(api, namespace="gondor-system")
watch = watch.filter(field_selector={"metadata.name": "my-job"}).watch()

# watch is a generator:
for watch_event in watch:
    print(watch_event.type) # 'ADDED', 'DELETED', 'MODIFIED'
    print(watch_event.object) # pykube.Job object

Create a ReplicationController:

obj = {
    "apiVersion": "v1",
    "kind": "ReplicationController",
    "metadata": {
        "name": "my-rc",
        "namespace": "gondor-system"
    },
    "spec": {
        "replicas": 3,
        "selector": {
            "app": "nginx"
        },
        "template": {
            "metadata": {
                "labels": {
                    "app": "nginx"
                }
            },
            "spec": {
                "containers": [
                    {
                        "name": "nginx",
                        "image": "nginx",
                        "ports": [
                            {"containerPort": 80}
                        ]
                    }
                ]
            }
        }
    }
}
pykube.ReplicationController(api, obj).create()

Delete a ReplicationController:

obj = {
    "apiVersion": "v1",
    "kind": "ReplicationController",
    "metadata": {
        "name": "my-rc",
        "namespace": "gondor-system"
    }
}
pykube.ReplicationController(api, obj).delete()

Check server version:

api = pykube.HTTPClient(pykube.KubeConfig.from_file("/Users/<username>/.kube/config"))
api.version

HTTPie

pykube can be used together with HTTPie for Kubernetes command line querying goodness. For example:

pip install httpie
http pykube://minikube/api/v1/services

The above example will construct an HTTP request to the cluster behind the minikube context and show you the response containing all services.

Requirements

• Python 2.7 or 3.3+

• requests (included in install_requires)

• PyYAML (included in install_requires)

License

The code in this project is licensed under the Apache License, version 2.0 (included in this repository under LICENSE).

Contributing

By making a contribution to this project, you are agreeing to the Developer Certificate of Origin v1.1 (also included in this repository under DCO.txt).

Code of Conduct

In order to foster a kind, inclusive, and harassment-free community, the Kel Project follows the Contributor Covenant Code of Conduct.

Commercial Support

Commercial support for Kel is available through Eldarion, please contact info@eldarion.com.