计算修改ResourceQuota

要在现有的ResourceQuota基础上添加加1个CPU和1Gi的内存配额还有3Gi的存储配额,以下是示例代码:

package main

import (
	"context"
	"flag"
	"fmt"
	"path/filepath"

	v1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/client-go/kubernetes"
	"k8s.io/client-go/tools/clientcmd"
)

func main() {
	var kubeconfig *string
	if home := homeDir(); home != "" {
		kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file")
	} else {
		kubeconfig = flag.String("kubeconfig", "", "absolute path to the kubeconfig file")
	}
	flag.Parse()

	config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
	if err != nil {
		panic(err.Error())
	}

	clientset, err := kubernetes.NewForConfig(config)
	if err != nil {
		panic(err.Error())
	}

	// 获取现有的ResourceQuota对象
	resourceQuota, err := clientset.CoreV1().ResourceQuotas("your-namespace").Get(context.Background(), "existing-resourcequota", metav1.GetOptions{})
	if err != nil {
		panic(err.Error())
	}

	// 添加1个CPU和1Gi的内存配额到现有的ResourceQuota对象
	if value, found := resourceQuota.Spec.Hard[v1.ResourceLimitsCPU]; found {
		cpuQuantity, _ := value.AsInt64()
		cpuQuantity += 1
		resourceQuota.Spec.Hard[v1.ResourceLimitsCPU] = resourceQuantity(fmt.Sprintf("%d", cpuQuantity))
	} else {
		resourceQuota.Spec.Hard[v1.ResourceLimitsCPU] = resourceQuantity("1")
	}

	if value, found := resourceQuota.Spec.Hard[v1.ResourceLimitsMemory]; found {
		memoryQuantity, _ := value.AsInt64()
		memoryQuantity += 1024 // 1Gi = 1024Mi
		resourceQuota.Spec.Hard[v1.ResourceLimitsMemory] = resourceQuantity(fmt.Sprintf("%dMi", memoryQuantity))
	} else {
		resourceQuota.Spec.Hard[v1.ResourceLimitsMemory] = resourceQuantity("1Gi")
	}

	// 添加3Gi的存储配额到现有的ResourceQuota对象
	if value, found := resourceQuota.Spec.Hard[v1.ResourceStorage]; found {
		storageQuantity, _ := value.AsInt64()
		storageQuantity += 3072 // 3Gi = 3072Mi
		resourceQuota.Spec.Hard[v1.ResourceStorage] = resourceQuantity(fmt.Sprintf("%dMi", storageQuantity))
	} else {
		resourceQuota.Spec.Hard[v1.ResourceStorage] = resourceQuantity("3Gi")
	}

	// 更新ResourceQuota对象
	updatedResourceQuota, err := clientset.CoreV1().ResourceQuotas("your-namespace").Update(context.Background(), resourceQuota, metav1.UpdateOptions{})
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("Updated ResourceQuota %s in namespace %s\n", updatedResourceQuota.Name, updatedResourceQuota.Namespace)
}

func resourceQuantity(amount string) *v1.Quantity {
	quantity := v1.MustParse(amount)
	return &quantity
}

func homeDir() string {
	if h := homeDir(); h != "" {
		return h
	}
	return ""
}

在上面的示例中,我们首先使用 Get 方法获取了现有的ResourceQuota对象,然后修改了CPU和内存的配额,并使用 Update 方法将其更新到Kubernetes集群中。你可以根据自己的需求修改命名空间名称和现有ResourceQuota的名称。

希望这个示例能够帮助你开始使用Kubernetes的Client-Go库来在现有的ResourceQuota基础上添加CPU和内存配额。如果你有其他问题或需要更多帮助,请随时告诉我。

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