Get current resource usage of a pod in Kubernetes with Go client

Question

The kubernetes go client has tons of methods and I can\'t find how I can get the current CPU & RAM usage of a specific (or all pods).

Can someone tell me what method

Answer 1

here is an example.

package main

import (
    "fmt"

    metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    "k8s.io/client-go/tools/clientcmd"
    metrics "k8s.io/metrics/pkg/client/clientset/versioned"
)

func main() {
    var kubeconfig, master string //empty, assuming inClusterConfig
    config, err := clientcmd.BuildConfigFromFlags(master, kubeconfig)
    if err != nil {
        panic(err)
    }

    mc, err := metrics.NewForConfig(config)
    if err != nil {
        panic(err)
    }
    podMetrics, err := mc.MetricsV1beta1().PodMetricses(metav1.NamespaceAll).List(metav1.ListOptions{})
    if err != nil {
        fmt.Println("Error:", err)
        return
    }
    for _, podMetric := range podMetrics.Items {
        podContainers := podMetric.Containers
        for _, container := range podContainers {
            cpuQuantity, ok := container.Usage.Cpu().AsInt64()
            memQuantity, ok := container.Usage.Memory().AsInt64()
            if !ok {
                return
            }
            msg := fmt.Sprintf("Container Name: %s \n CPU usage: %d \n Memory usage: %d", container.Name, cpuQuantity, memQuantity)
            fmt.Println(msg)
        }

    }
}