1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
# Copyright 2021 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.
"""
This example demonstrates the following:
- Creation of a k8s service using dynamic-client
- List, patch(update), delete the service
"""
from kubernetes import config, dynamic
from kubernetes.client import api_client
def main():
# Creating a dynamic client
client = dynamic.DynamicClient(
api_client.ApiClient(configuration=config.load_kube_config())
)
# fetching the service api
api = client.resources.get(api_version="v1", kind="Service")
name = "frontend-service"
service_manifest = {
"apiVersion": "v1",
"kind": "Service",
"metadata": {"labels": {"name": name}, "name": name, "resourceversion": "v1"},
"spec": {
"ports": [
{"name": "port", "port": 80, "protocol": "TCP", "targetPort": 80}
],
"selector": {"name": name},
},
}
# Creating service `frontend-service` in the `default` namespace
service = api.create(body=service_manifest, namespace="default")
print("\n[INFO] service `frontend-service` created\n")
# Listing service `frontend-service` in the `default` namespace
service_created = api.get(name=name, namespace="default")
print("%s\t%s" % ("NAMESPACE", "NAME"))
print(
"%s\t\t%s\n"
% (service_created.metadata.namespace, service_created.metadata.name)
)
# Patching the `spec` section of the `frontend-service`
service_manifest["spec"]["ports"] = [
{"name": "new", "port": 8080, "protocol": "TCP", "targetPort": 8080}
]
service_patched = api.patch(body=service_manifest, name=name, namespace="default")
print("\n[INFO] service `frontend-service` patched\n")
print("%s\t%s\t\t\t%s" % ("NAMESPACE", "NAME", "PORTS"))
print(
"%s\t\t%s\t%s\n"
% (
service_patched.metadata.namespace,
service_patched.metadata.name,
service_patched.spec.ports,
)
)
# Deleting service `frontend-service` from the `default` namespace
service_deleted = api.delete(name=name, body={}, namespace="default")
print("\n[INFO] service `frontend-service` deleted\n")
if __name__ == "__main__":
main()
|
