Addition of ScaleIO Kubernetes Volume Plugin

This commits implements the Kubernetes volume plugin allowing pods to seamlessly access and use data stored on ScaleIO volumes.

vendor/github.com/codedellemc/goscaleio/device.go

@@ -0,0 +1,110 @@
+package goscaleio
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"reflect"
+
+	types "github.com/codedellemc/goscaleio/types/v1"
+)
+
+type Device struct {
+	Device *types.Device
+	client *Client
+}
+
+func NewDevice(client *Client) *Device {
+	return &Device{
+		Device: new(types.Device),
+		client: client,
+	}
+}
+
+func NewDeviceEx(client *Client, device *types.Device) *Device {
+	return &Device{
+		Device: device,
+		client: client,
+	}
+}
+
+func (storagePool *StoragePool) AttachDevice(path string, sdsID string) (string, error) {
+	endpoint := storagePool.client.SIOEndpoint
+
+	deviceParam := &types.DeviceParam{}
+	deviceParam.Name = path
+	deviceParam.DeviceCurrentPathname = path
+	deviceParam.StoragePoolID = storagePool.StoragePool.ID
+	deviceParam.SdsID = sdsID
+	deviceParam.TestMode = "testAndActivate"
+
+	jsonOutput, err := json.Marshal(&deviceParam)
+	if err != nil {
+		return "", fmt.Errorf("error marshaling: %s", err)
+	}
+	endpoint.Path = fmt.Sprintf("/api/types/Device/instances")
+
+	req := storagePool.client.NewRequest(map[string]string{}, "POST", endpoint, bytes.NewBufferString(string(jsonOutput)))
+	req.SetBasicAuth("", storagePool.client.Token)
+	req.Header.Add("Accept", "application/json;version="+storagePool.client.configConnect.Version)
+	req.Header.Add("Content-Type", "application/json;version="+storagePool.client.configConnect.Version)
+
+	resp, err := storagePool.client.retryCheckResp(&storagePool.client.Http, req)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	bs, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return "", errors.New("error reading body")
+	}
+
+	var dev types.DeviceResp
+	err = json.Unmarshal(bs, &dev)
+	if err != nil {
+		return "", err
+	}
+
+	return dev.ID, nil
+}
+
+func (storagePool *StoragePool) GetDevice() (devices []types.Device, err error) {
+	endpoint := storagePool.client.SIOEndpoint
+	endpoint.Path = fmt.Sprintf("/api/instances/StoragePool::%v/relationships/Device", storagePool.StoragePool.ID)
+
+	req := storagePool.client.NewRequest(map[string]string{}, "GET", endpoint, nil)
+	req.SetBasicAuth("", storagePool.client.Token)
+	req.Header.Add("Accept", "application/json;version="+storagePool.client.configConnect.Version)
+
+	resp, err := storagePool.client.retryCheckResp(&storagePool.client.Http, req)
+	if err != nil {
+		return []types.Device{}, fmt.Errorf("problem getting response: %v", err)
+	}
+	defer resp.Body.Close()
+
+	if err = storagePool.client.decodeBody(resp, &devices); err != nil {
+		return []types.Device{}, fmt.Errorf("error decoding instances response: %s", err)
+	}
+
+	return devices, nil
+}
+
+func (storagePool *StoragePool) FindDevice(field, value string) (device *types.Device, err error) {
+	devices, err := storagePool.GetDevice()
+	if err != nil {
+		return &types.Device{}, nil
+	}
+
+	for _, device := range devices {
+		valueOf := reflect.ValueOf(device)
+		switch {
+		case reflect.Indirect(valueOf).FieldByName(field).String() == value:
+			return &device, nil
+		}
+	}
+
+	return &types.Device{}, errors.New("Couldn't find DEV")
+}