// Retrieve metrics from the kubelet server of the given node.
func getKubeletMetricsThroughProxy(c *client.Client, node string) (string, error) {
client, err := nodeProxyRequest(c, node, "metrics")
if err != nil {
return "", err
}
metric, errRaw := client.Raw()
if errRaw != nil {
return "", err
}
return string(metric), nil
}
func GetKubeletHeapStats(c *client.Client, nodeName string) (string, error) {
client, err := NodeProxyRequest(c, nodeName, "debug/pprof/heap")
if err != nil {
return "", err
}
raw, errRaw := client.Raw()
if errRaw != nil {
return "", err
}
stats := string(raw)
// Only dumping the runtime.MemStats numbers to avoid polluting the log.
numLines := 23
lines := strings.Split(stats, "\n")
return strings.Join(lines[len(lines)-numLines:], "\n"), nil
}