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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.
"""
Creates deployment, service, and ingress objects. The ingress allows external
network access to the cluster.
"""
from kubernetes import client, config
def create_deployment(apps_v1_api):
container = client.V1Container(
name="deployment",
image="gcr.io/google-appengine/fluentd-logger",
image_pull_policy="Never",
ports=[client.V1ContainerPort(container_port=5678)],
)
# Template
template = client.V1PodTemplateSpec(
metadata=client.V1ObjectMeta(labels={"app": "deployment"}),
spec=client.V1PodSpec(containers=[container]))
# Spec
spec = client.V1DeploymentSpec(
replicas=1,
selector=client.V1LabelSelector(
match_labels={"app": "deployment"}
),
template=template)
# Deployment
deployment = client.V1Deployment(
api_version="apps/v1",
kind="Deployment",
metadata=client.V1ObjectMeta(name="deployment"),
spec=spec)
# Creation of the Deployment in specified namespace
# (Can replace "default" with a namespace you may have created)
apps_v1_api.create_namespaced_deployment(
namespace="default", body=deployment
)
def create_service():
core_v1_api = client.CoreV1Api()
body = client.V1Service(
api_version="v1",
kind="Service",
metadata=client.V1ObjectMeta(
name="service-example"
),
spec=client.V1ServiceSpec(
selector={"app": "deployment"},
ports=[client.V1ServicePort(
port=5678,
target_port=5678
)]
)
)
# Creation of the Deployment in specified namespace
# (Can replace "default" with a namespace you may have created)
core_v1_api.create_namespaced_service(namespace="default", body=body)
def create_ingress(networking_v1_api):
body = client.V1Ingress(
api_version="networking.k8s.io/v1",
kind="Ingress",
metadata=client.V1ObjectMeta(name="ingress-example", annotations={
"nginx.ingress.kubernetes.io/rewrite-target": "/"
}),
spec=client.V1IngressSpec(
rules=[client.V1IngressRule(
host="example.com",
http=client.V1HTTPIngressRuleValue(
paths=[client.V1HTTPIngressPath(
path="/",
path_type="Exact",
backend=client.V1IngressBackend(
service=client.V1IngressServiceBackend(
port=client.V1ServiceBackendPort(
number=5678,
),
name="service-example")
)
)]
)
)
]
)
)
# Creation of the Deployment in specified namespace
# (Can replace "default" with a namespace you may have created)
networking_v1_api.create_namespaced_ingress(
namespace="default",
body=body
)
def main():
# Fetching and loading local Kubernetes Information
config.load_kube_config()
apps_v1_api = client.AppsV1Api()
networking_v1_api = client.NetworkingV1Api()
create_deployment(apps_v1_api)
create_service()
create_ingress(networking_v1_api)
if __name__ == "__main__":
main()
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