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# Copyright 2019 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Uses a Custom Resource Definition (CRD) to create a custom object, in this case
a CronTab. This example use an example CRD from this tutorial:
https://kubernetes.io/docs/tasks/access-kubernetes-api/custom-resources/custom-resource-definitions/
The following yaml manifest has to be applied first for namespaced scoped CRD:
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: crontabs.stable.example.com
spec:
group: stable.example.com
versions:
- name: v1
served: true
storage: true
schema:
openAPIV3Schema:
type: object
properties:
spec:
type: object
properties:
cronSpec:
type: string
image:
type: string
replicas:
type: integer
scope: Namespaced
names:
plural: crontabs
singular: crontab
kind: CronTab
shortNames:
- ct
"""
from pprint import pprint
from kubernetes import client, config
def main():
config.load_kube_config()
api = client.CustomObjectsApi()
# it's my custom resource defined as Dict
my_resource = {
"apiVersion": "stable.example.com/v1",
"kind": "CronTab",
"metadata": {"name": "my-new-cron-object"},
"spec": {
"cronSpec": "* * * * */5",
"image": "my-awesome-cron-image"
}
}
# patch to update the `spec.cronSpec` field
patch_body = {
"spec": {"cronSpec": "* * * * */10", "image": "my-awesome-cron-image"}
}
# create the resource
api.create_namespaced_custom_object(
group="stable.example.com",
version="v1",
namespace="default",
plural="crontabs",
body=my_resource,
)
print("Resource created")
# get the resource and print out data
resource = api.get_namespaced_custom_object(
group="stable.example.com",
version="v1",
name="my-new-cron-object",
namespace="default",
plural="crontabs",
)
print("Resource details:")
pprint(resource)
# patch the namespaced custom object to update the `spec.cronSpec` field
patch_resource = api.patch_namespaced_custom_object(
group="stable.example.com",
version="v1",
name="my-new-cron-object",
namespace="default",
plural="crontabs",
body=patch_body,
)
print("Resource details:")
pprint(patch_resource)
# delete it
api.delete_namespaced_custom_object(
group="stable.example.com",
version="v1",
name="my-new-cron-object",
namespace="default",
plural="crontabs",
body=client.V1DeleteOptions(),
)
print("Resource deleted")
if __name__ == "__main__":
main()
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