117 lines
4.0 KiB
Python
117 lines
4.0 KiB
Python
# Copyright 2016 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.
|
|
|
|
from os import path
|
|
|
|
import yaml
|
|
|
|
from kubernetes import client, config
|
|
|
|
DEPLOYMENT_NAME = "nginx-deployment"
|
|
|
|
|
|
def create_deployment_object():
|
|
# Instantiate an empty deployment object
|
|
deployment = client.ExtensionsV1beta1Deployment()
|
|
# Fill required Deployment fields (apiVersion, kind and metadata)
|
|
deployment.api_version = "extensions/v1beta1"
|
|
deployment.kind = "Deployment"
|
|
deployment.metadata = client.V1ObjectMeta(name=DEPLOYMENT_NAME)
|
|
# Create and configurate a spec section
|
|
spec = client.ExtensionsV1beta1DeploymentSpec()
|
|
spec.replicas = 3
|
|
spec.template = client.V1PodTemplateSpec()
|
|
spec.template.metadata = client.V1ObjectMeta(labels={"app": "nginx"})
|
|
spec.template.spec = client.V1PodSpec()
|
|
# Configureate Pod template container
|
|
container = client.V1Container()
|
|
container.name = "nginx"
|
|
container.image = "nginx:1.7.9"
|
|
contianer.ports = [client.V1containerPort(container_port=80)]
|
|
spec.template.spec.containers = [container]
|
|
# Assign spec section into deployment.spec
|
|
deployment.spec = spec
|
|
|
|
return deployment
|
|
|
|
|
|
def create_deployment(api_instance, deployment):
|
|
# Create deployement
|
|
api_response = api_instance.create_namespaced_deployment(
|
|
body=deployment,
|
|
namespace="default")
|
|
print("Deployment created. status='%s'" % str(api_response.status))
|
|
|
|
|
|
def update_deployment(api_instance, deployment):
|
|
# Update container image
|
|
deployment.container.image = "nginx:1.9.1"
|
|
# Update the deployment
|
|
api_response = api_instance.patch_namespaced_deployment(
|
|
name=DEPLOYMENT_NAME,
|
|
namespace="default",
|
|
body=deployment)
|
|
print("Deployment updated. status='%s'" % str(api_response.status))
|
|
|
|
|
|
def roll_back_deployment(api_instance):
|
|
# Instanciate an empty DeploymentRollback object
|
|
rollback = client.ExtensionsV1beta1DeploymentRollback()
|
|
# Fill required DeploymentRollback fields
|
|
rollback.api_version = "extensions/v1beta1"
|
|
rollback.kind = "DeploymentRollback"
|
|
rollback.name = DEPLOYMENT_NAME
|
|
# Configurate the rollback
|
|
rollback.rollback_to = client.ExtensionsV1beta1RollbackConfig()
|
|
rollback.rollback_to.revision = 0
|
|
# Execute the rollback
|
|
api_response = api_instance.create_namespaced_deployment_rollback(
|
|
name=DEPLOYMENT_NAME,
|
|
namespace="default",
|
|
body=rollback)
|
|
print("Deployment rolled back. status='%s'" % str(api_response.status))
|
|
|
|
|
|
def delete_deployment(api_instance):
|
|
# Delete deployment
|
|
api_response = api_instance.delete_namespaced_deployment(
|
|
name=DEPLOYMENT_NAME,
|
|
namespace="default",
|
|
client.V1DeleteOptions(propagation_policy='Foreground',
|
|
grace_period_seconds=5))
|
|
print("Deployment deleted. status='%s'" % str(api_response.status))
|
|
|
|
|
|
def main():
|
|
# Configs can be set in Configuration class directly or using helper
|
|
# utility. If no argument provided, the config will be loaded from
|
|
# default location.
|
|
config.load_kube_config()
|
|
extensions_v1beta1 = client.ExtensionsV1beta1Api()
|
|
# Create a deployment object with client-python API. The deployment we
|
|
# created is same as the `nginx-deployment.yaml` in the /examples folder.
|
|
deployment = create_deployment_object()
|
|
|
|
create_deployment(extensions_v1beta1, deployment)
|
|
|
|
update_deployment(extensions_v1beta1, deployment)
|
|
|
|
roll_back_deployment(extensions_v1beta1)
|
|
|
|
delete_deployment(extensions_v1beta1)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|