98 lines
3.1 KiB
Python
98 lines
3.1 KiB
Python
# Copyright 2016 The Kubernetes Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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Creates, updates, and deletes a deployment using AppsV1Api.
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"""
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from kubernetes import client, config
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DEPLOYMENT_NAME = "nginx-deployment"
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def create_deployment_object():
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# Configureate Pod template container
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container = client.V1Container(
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name="nginx",
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image="nginx:1.15.4",
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ports=[client.V1ContainerPort(container_port=80)])
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# Create and configurate a spec section
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template = client.V1PodTemplateSpec(
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metadata=client.V1ObjectMeta(labels={"app": "nginx"}),
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spec=client.V1PodSpec(containers=[container]))
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# Create the specification of deployment
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spec = client.V1DeploymentSpec(
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replicas=3,
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template=template,
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selector={'matchLabels': {'app': 'nginx'}})
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# Instantiate the deployment object
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deployment = client.V1Deployment(
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api_version="apps/v1",
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kind="Deployment",
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metadata=client.V1ObjectMeta(name=DEPLOYMENT_NAME),
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spec=spec)
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return deployment
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def create_deployment(api_instance, deployment):
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# Create deployement
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api_response = api_instance.create_namespaced_deployment(
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body=deployment,
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namespace="default")
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print("Deployment created. status='%s'" % str(api_response.status))
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def update_deployment(api_instance, deployment):
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# Update container image
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deployment.spec.template.spec.containers[0].image = "nginx:1.16.0"
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# Update the deployment
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api_response = api_instance.patch_namespaced_deployment(
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name=DEPLOYMENT_NAME,
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namespace="default",
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body=deployment)
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print("Deployment updated. status='%s'" % str(api_response.status))
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def delete_deployment(api_instance):
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# Delete deployment
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api_response = api_instance.delete_namespaced_deployment(
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name=DEPLOYMENT_NAME,
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namespace="default",
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body=client.V1DeleteOptions(
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propagation_policy='Foreground',
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grace_period_seconds=5))
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print("Deployment deleted. status='%s'" % str(api_response.status))
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def main():
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# Configs can be set in Configuration class directly or using helper
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# utility. If no argument provided, the config will be loaded from
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# default location.
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config.load_kube_config()
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apps_v1 = client.AppsV1Api()
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# Create a deployment object with client-python API. The deployment we
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# created is same as the `nginx-deployment.yaml` in the /examples folder.
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deployment = create_deployment_object()
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create_deployment(apps_v1, deployment)
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update_deployment(apps_v1, deployment)
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delete_deployment(apps_v1)
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if __name__ == '__main__':
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main()
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