我有一个演示golang程序,用于列出没有特定标签的Pod。我想对其进行修改,以便它还可以为每个吊舱添加标签。
(我使用的是AWS托管的Kubernetes服务,EKS,所以有一些特定于EKS的样板代码)
package main
import (
"fmt"
eksauth "github.com/chankh/eksutil/pkg/auth"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
func main() {
cfg := &eksauth.ClusterConfig{ClusterName: "my_cluster_name"}
clientset, _ := eksauth.NewAuthClient(cfg)
api := clientset.CoreV1()
// Get all pods from all namespaces without the "sent_alert_emailed" label.
pods, _ := api.Pods("").List(metav1.ListOptions{LabelSelector: "!sent_alert_emailed"})
for i, pod := range pods.Items {
fmt.Println(fmt.Sprintf("[%2d] %s, Phase: %s, Created: %s, HostIP: %s", i, pod.GetName(), string(pod.Status.Phase), pod.GetCreationTimestamp(), string(pod.Status.HostIP)))
// Here I want to add a label to this pod
// e.g. something like:
// pod.addLabel("sent_alert_emailed=true")
}
}
我知道kubectl可用于添加标签,例如
kubectl label pod my-pod new-label=awesome # Add a Label
kubectl label pod my-pod new-label=awesomer --overwrite # Change a existing label
我希望通过go-client有一种等效的方法吗?
答案 0 :(得分:1)
我试图基于OP's code snippet使用client-go向节点添加新标签,我使用的最短路径如下。
labelPatch := fmt.Sprintf(`[{"op":"add","path":"/metadata/labels/%s","value":"%s" }]`, labelkey, labelValue)
_, err = kc.CoreV1().Nodes().Patch(node.Name, types.JSONPatchType, []byte(labelPatch))
注意:add
至/metadata/labels
将覆盖所有现有标签,因此我选择了/metadata/labels/${LABEL_KEY}
的路径以仅添加新标签
答案 1 :(得分:0)
我希望有一种更优雅的方法,但是在我了解它之前,我设法使用Patch
向Pod添加了标签。这是我的演示代码(同样,您可以忽略一些EKS样板内容):
package main
import (
"fmt"
"encoding/json"
"time"
"k8s.io/apimachinery/pkg/types"
eksauth "github.com/chankh/eksutil/pkg/auth"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
type patchStringValue struct {
Op string `json:"op"`
Path string `json:"path"`
Value string `json:"value"`
}
func main() {
var updateErr error
cfg := &eksauth.ClusterConfig{ClusterName: "my cluster name"}
clientset, _ := eksauth.NewAuthClient(cfg)
api := clientset.CoreV1()
// Get all pods from all namespaces without the "sent_alert_emailed" label.
pods, _ := api.Pods("").List(metav1.ListOptions{LabelSelector: "!sent_alert_emailed"})
for i, pod := range pods.Items {
fmt.Println(fmt.Sprintf("[%2d] %s, Phase: %s, Created: %s, HostIP: %s", i, pod.GetName(), string(pod.Status.Phase), pod.GetCreationTimestamp(), string(pod.Status.HostIP)))
payload := []patchStringValue{{
Op: "replace",
Path: "/metadata/labels/sent_alert_emailed",
Value: time.Now().Format("2006-01-02_15.04.05"),
}}
payloadBytes, _ := json.Marshal(payload)
_, updateErr = api.Pods(pod.GetNamespace()).Patch(pod.GetName(), types.JSONPatchType, payloadBytes)
if updateErr == nil {
fmt.Println(fmt.Sprintf("Pod %s labelled successfully.", pod.GetName()))
} else {
fmt.Println(updateErr)
}
}
}