前言:
K8s也提供API接口,提供这个接口的是管理节点的apiserver组件,apiserver服务负责提供HTTP API,以便用户、其他组件相互通信。客户端库
安装
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pip install kubernetes - i https: / / pypi.douban.com / simple |
k8s认证方式:
- HTTPS 证书认证:基于CA证书签名的数字证书认证
- HTTP Token认证:通过一个Token来识别用户
HTTPS证书认证(kubeconfig)
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import os from kubernetes import client, config config.load_kube_config(file_path) # 指定kubeconfig配置文件 apps_api = client.AppsV1Api() # 资源接口类实例化 for dp in apps_api.list_deployment_for_all_namespaces().items: print (dp) |
HTTP Token认证(ServiceAccount)
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from kubernetes import client, config configuration = client.Configuration() configuration.host = "https://192.168.3.201:16443" # APISERVER地址 configuration.ssl_ca_cert = "ca.crt" # CA证书 /etc/kubernetes/pki/ca.crt configuration.verify_ssl = True # 启用证书验证 configuration.api_key = { "authorization" : "Bearer " + token} # 指定Token字符串 client.Configuration.set_default(configuration) apps_api = client.AppsV1Api() |
这2个认证,2选1
获取Token字符串:创建service account并绑定默认cluster-admin管理员集群角色:
创建用户:
$ kubectl create serviceaccount dashboard-admin -n kube-system
用户授权:
$ kubectl create clusterrolebinding dashboard-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin
获取用户Token:
$ kubectl describe secrets -n kube-system $(kubectl -n kube-system get secret | awk ‘/dashboard-admin/{print $1}’)
其他常用资源接口类实例化:
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core_api = client.CoreV1Api() # namespace,pod,service,pv,pvc apps_api = client.AppsV1Api() # deployment networking_api = client.NetworkingV1beta1Api() # ingress storage_api = client.StorageV1Api() # storage_class |
举个例子
Deployment操作:
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# 先得有上面的认证,下面的代码才行 # 创建 namespace = "default" name = "api-test" replicas = 3 labels = { 'nginx' : 'true' } # 不区分数据类型,都要加引号 image = "nginx" body = client.V1Deployment( api_version = "apps/v1" , kind = "Deployment" , metadata = client.V1ObjectMeta(name = name), spec = client.V1DeploymentSpec( replicas = replicas, selector = { 'matchLabels' : labels}, template = client.V1PodTemplateSpec( metadata = client.V1ObjectMeta(labels = labels), spec = client.V1PodSpec( containers = [client.V1Container( name = "web" , image = image )] ) ), ) ) try : apps_api.create_namespaced_deployment(namespace = namespace, body = body) except Exception as e: status = getattr (e, "status" ) if status = = 400 : print (e) print ( "格式错误" ) elif status = = 403 : print ( "没权限" ) # 删除 name = "api-test" apps_api.delete_namespaced_deployment(namespace = namespace, name = name) |
但其实这个API挺绕的 ,一个创建deployment的,这里N多的类的对象。
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原文链接:https://blog.csdn.net/hans99812345/article/details/124851132