Add network hardware info (#8358)

peerRESTVersion changed to v6

pkg/madmin/hardware-commands.go

@@ -20,6 +20,7 @@ package madmin
 import (
 	"encoding/json"
 	"io/ioutil"
+	"net"
 	"net/http"
 	"net/url"
 
@@ -34,6 +35,8 @@ const (
 	HARDWARE = "hwType"
 	// CPU represents hardware as cpu
 	CPU HardwareType = "cpu"
+	// NETWORK hardware Info
+	NETWORK HardwareType = "network"
 )
 
 // ServerCPUHardwareInfo holds informantion about cpu hardware
@@ -76,3 +79,44 @@ func (adm *AdminClient) ServerCPUHardwareInfo() ([]ServerCPUHardwareInfo, error)
 	}
 	return cpuInfo, nil
 }
+
+// ServerNetworkHardwareInfo holds informantion about cpu hardware
+type ServerNetworkHardwareInfo struct {
+	Addr        string          `json:"addr"`
+	Error       string          `json:"error,omitempty"`
+	NetworkInfo []net.Interface `json:"network"`
+}
+
+// ServerNetworkHardwareInfo - Returns network hardware information
+func (adm *AdminClient) ServerNetworkHardwareInfo() ([]ServerNetworkHardwareInfo, error) {
+	v := url.Values{}
+	v.Set(HARDWARE, string(NETWORK))
+	resp, err := adm.executeMethod("GET", requestData{
+		relPath:     "/v1/hardware",
+		queryValues: v,
+	})
+
+	defer closeResponse(resp)
+	if err != nil {
+		return nil, err
+	}
+
+	// Check response http status code
+	if resp.StatusCode != http.StatusOK {
+		return nil, httpRespToErrorResponse(resp)
+	}
+
+	// Unmarshal the server's json response
+	var networkInfo []ServerNetworkHardwareInfo
+
+	respBytes, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	err = json.Unmarshal(respBytes, &networkInfo)
+	if err != nil {
+		return nil, err
+	}
+	return networkInfo, nil
+}