117 lines
4.0 KiB
Python
117 lines
4.0 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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from os import path
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import yaml
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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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# Instantiate an empty deployment object
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deployment = client.ExtensionsV1beta1Deployment()
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# Fill required Deployment fields (apiVersion, kind and metadata)
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deployment.api_version = "extensions/v1beta1"
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deployment.kind = "Deployment"
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deployment.metadata = client.V1ObjectMeta(name=DEPLOYMENT_NAME)
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# Create and configurate a spec section
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spec = client.ExtensionsV1beta1DeploymentSpec()
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spec.replicas = 3
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spec.template = client.V1PodTemplateSpec()
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spec.template.metadata = client.V1ObjectMeta(labels={"app": "nginx"})
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spec.template.spec = client.V1PodSpec()
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# Configureate Pod template container
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container = client.V1Container()
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container.name = "nginx"
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container.image = "nginx:1.7.9"
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contianer.ports = [client.V1containerPort(container_port=80)]
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spec.template.spec.containers = [container]
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# Assign spec section into deployment.spec
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deployment.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.container.image = "nginx:1.9.1"
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# Update the deployment
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api_response = api_instance.replace_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 roll_back_deployment(api_instance):
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# Instanciate an empty DeploymentRollback object
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rollback = client.ExtensionsV1beta1DeploymentRollback()
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# Fill required DeploymentRollback fields
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rollback.api_version = "extensions/v1beta1"
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rollback.kind = "DeploymentRollback"
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rollback.name = DEPLOYMENT_NAME
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# Configurate the rollback
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rollback.rollback_to = client.ExtensionsV1beta1RollbackConfig()
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rollback.rollback_to.revision = 0
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# Execute the rollback
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api_response = api_instance.create_namespaced_deployment_rollback(
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name=DEPLOYMENT_NAME,
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namespace="default",
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body=rollback)
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print("Deployment rolled back. 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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client.V1DeleteOptions(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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extensions_v1beta1 = client.ExtensionsV1beta1Api()
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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(extensions_v1beta1, deployment)
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update_deployment(extensions_v1beta1, deployment)
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roll_back_deployment(extensions_v1beta1)
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delete_deployment(extensions_v1beta1)
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if __name__ == '__main__':
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main()
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