// such as, ":9000", "localhost:9000", "http://localhost:9000/"
func extractHostPort(hostAddr string) (string, string, error) {
	var addr, scheme string

	if hostAddr == "" {
		return "", "", errors.New("unable to process empty address")
	}

	// Simplify the work of url.Parse() and always send a url with
	if !strings.HasPrefix(hostAddr, "http://") && !strings.HasPrefix(hostAddr, "https://") {
		hostAddr = "//" + hostAddr

			err := addPodToHostNSIpset(pod, podIPs, &s.hostsideProbeIPSet)
			if err != nil {
				return err
			}
			addedIPSnapshot = append(addedIPSnapshot, podIPs...)
		}

	}
	return pruneHostIPset(sets.New(addedIPSnapshot...), &s.hostsideProbeIPSet)
}

// addPodToHostNSIpset:
// 1. get pod manifest
// 2. Get all pod ips (might be several, v6/v4)
// 3. update ipsets accordingly