通過將身份認證令牌直接傳給 API 服務器，可以避免使用 kubectl 代理，像這樣：
使用 grep/cut 方式：
# 查看所有的集群，因為你的 .kubeconfig 文件中可能包含多個上下文
kubectl config view -o jsonpath='{"Cluster name\tServer\n"}{range .clusters[*]}{.name}{"\t"}{.cluster.server}{"\n"}{end}'
# 從上述命令輸出中選擇你要與之交互的集群的名稱
export CLUSTER_NAME="some_server_name"
# 指向引用該集群名稱的 API 服務器
APISERVER=$(kubectl config view -o jsonpath="{.clusters[?(@.name==\"$CLUSTER_NAME\")].cluster.server}")
# 獲得令牌
TOKEN=$(kubectl get secrets -o jsonpath="{.items[?(@.metadata.annotations['kubernetes\.io/service-account\.name']=='default')].data.token}"|base64 -d)
# 使用令牌玩轉 API
curl -X GET $APISERVER/api --header "Authorization: Bearer $TOKEN" --insecure
客戶端庫：https://kubernetes.io/zh/docs/reference/using-api/client-libraries/
python舉例：
目錄結構
配置文件兩種方式
1、將集群中的~/.kube/config,重命名為kubeconfig.yaml
代碼：
from kubernetes import client,config
from kubernetes.stream import stream
import yaml
config_file = r"D:\Users\JackHe\PycharmProjects\JJ\k8s\auth\kubeconfig.yaml"
config.kube_config.load_kube_config(config_file=config_file)
Api_Instance = client.CoreV1Api()
Api_Batch = client.BatchV1Api()
#列出所有的namesapce
for ns in Api_Instance.list_namespace().items:
print(ns.metadata.name)
#列出所有的nodes
def list_node():
api_response = Api_Instance.list_node()
data = {}
for i in api_response.items:
data[i.metadata.name] = {"name": i.metadata.name,
"status": i.status.conditions[-1].type if i.status.conditions[-1].status == "True" else "NotReady",
"ip": i.status.addresses[0].address,
"kubelet_version": i.status.node_info.kubelet_version,
"os_image": i.status.node_info.os_image,
}
return data
nodes = list_node()
print(nodes)
2、使用token形式，獲取命令上文所示。
代碼：
# -*- coding: utf-8 -*-
from kubernetes.client import api_client
from kubernetes.client.apis import core_v1_api
from kubernetes import client,config
class KubernetesTools(object):
def __init__(self):
self.k8s_url = 'https://192.168.1.56:6443'
def get_token(self):
"""
獲取token
:return:
"""
with open(r'D:\Users\JackHe\PycharmProjects\JJ\k8s\auth\token', 'r') as file:
Token = file.read().strip('\n')
return Token
def get_api(self):
"""
獲取API的CoreV1Api版本對象
:return:
"""
configuration = client.Configuration()
configuration.host = self.k8s_url
configuration.verify_ssl = False
configuration.api_key = {"authorization": "Bearer " + self.get_token()}
client1 = api_client.ApiClient(configuration=configuration)
api = core_v1_api.CoreV1Api(client1)
return api
def get_namespace_list(self):
"""
獲取命名空間列表
:return:
"""
api = self.get_api()
namespace_list = []
for ns in api.list_namespace().items:
# print(ns.metadata.name)
namespace_list.append(ns.metadata.name)
return namespace_list
def get_pod_list(self):
api = self.get_api()
print("Listing pods with their IPs:")
ret = api.list_pod_for_all_namespaces(watch=False)
for i in ret.items:
print("%s\t%s\t%s" % (i.status.pod_ip, i.metadata.namespace, i.metadata.name))
def get_service_list(self):
api = self.get_api()
ret = api.list_service_for_all_namespaces(watch=False)
for i in ret.items:
print("%s \t%s \t%s \t%s \t%s \n" %(i.kind,i.metadata.namespace,i.metadata.name,i.spec.cluster_ip,i.spec.ports))
if __name__ == '__main__':
namespace_list = KubernetesTools().get_namespace_list()
pod_list = KubernetesTools().get_pod_list()
service = KubernetesTools().get_service_list()
print(namespace_list)
print(pod_list)
print(service)
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