您需要的事件嗅探几乎正是 KubeDNS 的工作原理。
所以在这里用古老而简单的方式编码。看看podWatchFunc
方法。所以这里是代码的简短示例
func podWatchFunc(c *kubernetes.Clientset, ns string, s labels.Selector) func(options meta.ListOptions) (watch.Interface, error) {
return func(options meta.ListOptions) (watch.Interface, error) {
if s != nil {
options.LabelSelector = s.String()
}
w, err := c.CoreV1().Pods(ns).Watch(options)
if err != nil {
return nil, err
}
return w, nil
}
}
官方文档中另一种好的推荐方式
import (
"fmt"
"k8s.io/client-go/1.4/kubernetes"
"k8s.io/client-go/1.4/pkg/api/v1"
"k8s.io/client-go/1.4/tools/clientcmd"
)
...
// uses the current context in kubeconfig
config, _ := clientcmd.BuildConfigFromFlags("", "path to kubeconfig")
// creates the clientset
clientset, _:= kubernetes.NewForConfig(config)
// access the API to list pods
pods, _:= clientset.CoreV1().Pods("").List(v1.ListOptions{})
fmt.Printf("There are %d pods in the cluster\n", len(pods.Items))
...
完整代码
你也可能理解 dns 是单独的 k8s 服务,而不是集群服务的一部分。
因此,如果您使用默认命名策略和 coredsn 或 dns-masq 服务,请找到 ip/host 并调用您的 dns 端点
。您还可以从pod 元数据名称或 selflink中获取域名
metadata:
creationTimestamp: 2018-04-01T13:45:01Z
generateName: client-deployment-f8454db47-
labels:
app: client
pod-template-hash: "940108603"
name: client-deployment-f8454db47-5gk64
namespace: novaposhta
ownerReferences:
- apiVersion: extensions/v1beta1
blockOwnerDeletion: true
controller: true
kind: ReplicaSet
name: client-deployment-f8454db47
uid: d833ef0f-35b2-11e8-9278-42010a840112
resourceVersion: "73550"
selfLink: /api/v1/namespaces/novaposhta/pods/client-deployment-f8454db47-5gk64