如何使用Golang从Kubernetes获取日志? [英] How to get logs from kubernetes using golang?
问题描述
我正在寻找如何使用golang从Kubernetes集群的pod中获取日志的解决方案.我看过" https://github.com/kubernetes/client-go "和" https://godoc.org/sigs.k8s.io/controller- runtime/pkg/client ",但无法理解如何为此目的使用它们.除了日志,我在获取K8S中的Pod或任何其他对象的信息方面都没有问题.
I'm looking for the solution of how to get logs from a pod in Kubernetes cluster using golang. I've looked at "https://github.com/kubernetes/client-go" and "https://godoc.org/sigs.k8s.io/controller-runtime/pkg/client", but couldn't understand how to use them for this purpose. I have no issues getting information of a pod or any other object in K8S except for logs.
例如,我正在使用" https://godoc.org/sigs.k8s.io/controller-runtime/pkg/client#example-Client--Get 以获得K8S职位信息:
For example, I'm using Get() from "https://godoc.org/sigs.k8s.io/controller-runtime/pkg/client#example-Client--Get" to get K8S job info:
found := &batchv1.Job{}
err = r.client.Get(context.TODO(), types.NamespacedName{Name: job.Name, Namespace: job.Namespace}, found)
请分享当今如何获取Pod的日志. 任何建议,将不胜感激!
Please share of how you get pod's logs nowadays. Any suggestions would be appreciated!
更新: > Kubernetes提供的解决方案是客户端api,用于记录日志特定的广告连播已过时.它有一些技巧,但不是最新的库.
Update: The solution provided in Kubernetes go client api for log of a particular pod is out of date. It have some tips, but it is not up to date with current libraries.
推荐答案
以下是我们最终使用客户端库的想法:
Here is what we came up with eventually using client-go library:
func getPodLogs(pod corev1.Pod) string {
podLogOpts := corev1.PodLogOptions{}
config, err := rest.InClusterConfig()
if err != nil {
return "error in getting config"
}
// creates the clientset
clientset, err := kubernetes.NewForConfig(config)
if err != nil {
return "error in getting access to K8S"
}
req := clientset.CoreV1().Pods(pod.Namespace).GetLogs(pod.Name, &podLogOpts)
podLogs, err := req.Stream()
if err != nil {
return "error in opening stream"
}
defer podLogs.Close()
buf := new(bytes.Buffer)
_, err = io.Copy(buf, podLogs)
if err != nil {
return "error in copy information from podLogs to buf"
}
str := buf.String()
return str
}
我希望它能对某人有所帮助.请分享您对如何从Kubernetes的吊舱中获取日志的想法或解决方案.
I hope it will help someone. Please share your thoughts or solutions of how you get logs from pods in Kubernetes.
这篇关于如何使用Golang从Kubernetes获取日志?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!