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| 1 | +# Copyright 2016 The Kubernetes Authors. |
| 2 | +# |
| 3 | +# Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | +# you may not use this file except in compliance with the License. |
| 5 | +# You may obtain a copy of the License at |
| 6 | +# |
| 7 | +# http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +# |
| 9 | +# Unless required by applicable law or agreed to in writing, software |
| 10 | +# distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | +# See the License for the specific language governing permissions and |
| 13 | +# limitations under the License. |
| 14 | + |
| 15 | +from os import path |
| 16 | + |
| 17 | +import yaml |
| 18 | + |
| 19 | +from kubernetes import client, config |
| 20 | + |
| 21 | +DEPLOYMENT_NAME = "nginx-deployment" |
| 22 | + |
| 23 | +def create_deployment_object(): |
| 24 | + # Instantiate an empty deployment object |
| 25 | + deployment = client.ExtensionsV1beta1Deployment() |
| 26 | + # Fill required Deployment fields (apiVersion, kind and metadata) |
| 27 | + deployment.api_version = "extensions/v1beta1" |
| 28 | + deployment.kind = "Deployment" |
| 29 | + deployment.metadata = client.V1ObjectMeta(name=DEPLOYMENT_NAME) |
| 30 | + # Create and configurate a spec section |
| 31 | + spec = client.ExtensionsV1beta1DeploymentSpec() |
| 32 | + spec.replicas = 3 |
| 33 | + spec.template = client.V1PodTemplateSpec() |
| 34 | + spec.template.metadata = client.V1ObjectMeta(labels={"app": "nginx"}) |
| 35 | + spec.template.spec = client.V1PodSpec() |
| 36 | + # Configureate Pod template container |
| 37 | + container = client.V1Container() |
| 38 | + container.name = "nginx" |
| 39 | + container.image = "nginx:1.7.9" |
| 40 | + contianer.ports = [client.V1containerPort(container_port=80)] |
| 41 | + spec.template.spec.containers = [container] |
| 42 | + # Assign spec section into deployment.spec |
| 43 | + deployment.spec = spec |
| 44 | + |
| 45 | + return deployment |
| 46 | + |
| 47 | +def create_deployment(api_instance, deployment): |
| 48 | + # Create deployement |
| 49 | + api_response = api_instance.create_namespaced_deployment( |
| 50 | + body=deployment, |
| 51 | + namespace="default") |
| 52 | + print("Deployment created. status='%s'" % str(api_response.status)) |
| 53 | + |
| 54 | +def update_deployment(api_instance, deployment): |
| 55 | + # Update container image |
| 56 | + deployment.container.image = "nginx:1.9.1" |
| 57 | + # Update the deployment |
| 58 | + api_response = api_instance.replace_namespaced_deployment( |
| 59 | + name=DEPLOYMENT_NAME, |
| 60 | + namespace="default", |
| 61 | + body=deployment) |
| 62 | + print("Deployment updated. status='%s'" % str(api_response.status)) |
| 63 | + |
| 64 | +def roll_back_deployment(api_instance): |
| 65 | + # Instanciate an empty DeploymentRollback object |
| 66 | + rollback = client.ExtensionsV1beta1DeploymentRollback() |
| 67 | + # Fill required DeploymentRollback fields |
| 68 | + rollback.api_version = "extensions/v1beta1" |
| 69 | + rollback.kind = "DeploymentRollback" |
| 70 | + rollback.name = DEPLOYMENT_NAME |
| 71 | + # Configurate the rollback |
| 72 | + rollback.rollback_to = client.ExtensionsV1beta1RollbackConfig() |
| 73 | + rollback.rollback_to.revision = 0 |
| 74 | + # Execute the rollback |
| 75 | + api_response = api_instance.create_namespaced_deployment_rollback( |
| 76 | + name=DEPLOYMENT_NAME, |
| 77 | + namespace="default", |
| 78 | + body=rollback) |
| 79 | + print("Deployment rolled back. status='%s'" % str(api_response.status)) |
| 80 | + |
| 81 | +def delete_deployment(api_instance): |
| 82 | + # Delete deployment |
| 83 | + api_response = api_instance.delete_namespaced_deployment( |
| 84 | + name=DEPLOYMENT_NAME, |
| 85 | + namespace="default", |
| 86 | + client.V1DeleteOptions(propagation_policy='Foreground', |
| 87 | + grace_period_seconds=5)) |
| 88 | + print("Deployment deleted. status='%s'" % str(api_response.status)) |
| 89 | + |
| 90 | + |
| 91 | +def main(): |
| 92 | + # Configs can be set in Configuration class directly or using helper |
| 93 | + # utility. If no argument provided, the config will be loaded from |
| 94 | + # default location. |
| 95 | + config.load_kube_config() |
| 96 | + extensions_v1beta1 = client.ExtensionsV1beta1Api() |
| 97 | + # Create a deployment object with client-python API. The deployment we |
| 98 | + # created is same as the `nginx-deployment.yaml` in the /examples folder. |
| 99 | + deployment = create_deployment_object() |
| 100 | + |
| 101 | + create_deployment(extensions_v1beta1, deployment) |
| 102 | + |
| 103 | + update_deployment(extensions_v1beta1, deployment) |
| 104 | + |
| 105 | + roll_back_deployment(extensions_v1beta1) |
| 106 | + |
| 107 | + delete_deployment(extensions_v1beta1) |
| 108 | + |
| 109 | +if __name__ == '__main__': |
| 110 | + main() |
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