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api.go
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api.go
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// Copyright (c) 2016 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package api
import (
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"strings"
"time"
"github.com/ciao-project/ciao/ciao-controller/types"
"github.com/ciao-project/ciao/service"
"github.com/ciao-project/ciao/uuid"
"github.com/golang/glog"
"github.com/gorilla/mux"
)
// Port is the default port number for the ciao API.
const Port = 8889
const (
// PoolsV1 is the content-type string for v1 of our pools resource
PoolsV1 = "x.ciao.pools.v1"
// ExternalIPsV1 is the content-type string for v1 of our external-ips resource
ExternalIPsV1 = "x.ciao.external-ips.v1"
// WorkloadsV1 is the content-type string for v1 of our workloads resource
WorkloadsV1 = "x.ciao.workloads.v1"
// TenantsV1 is the content-type string for v1 of our tenants resource
TenantsV1 = "x.ciao.tenants.v1"
// NodeV1 is the content-type string for v1 of our node resource
NodeV1 = "x.ciao.node.v1"
// ImagesV1 is the content-type string for v1 of our images resource
ImagesV1 = "x.ciao.images.v1"
// VolumesV1 is the content-type string for v1 of our volumes resource
VolumesV1 = "x.ciao.volumes.v1"
// InstancesV1 is the content-type string for v1 of our intances resource
InstancesV1 = "x.ciao.instances.v1"
)
// ErrorImage defines all possible image handling errors
type ErrorImage error
var (
// ErrNoImage is returned when an image is not found.
ErrNoImage = errors.New("Image not found")
// ErrImageSaving is returned when an image is being uploaded.
ErrImageSaving = errors.New("Image being uploaded")
// ErrBadUUID is returned when an invalid UUID is specified
ErrBadUUID = errors.New("Bad UUID")
// ErrAlreadyExists is returned when an attempt is made to add
// an image with a UUID that already exists.
ErrAlreadyExists = errors.New("Already Exists")
// ErrQuota is returned when the tenant exceeds its quota
ErrQuota = errors.New("Tenant over quota")
)
// CreateImageRequest contains information for a create image request.
type CreateImageRequest struct {
Name string `json:"name,omitempty"`
ID string `json:"id,omitempty"`
Visibility types.Visibility `json:"visibility,omitempty"`
}
// RequestedVolume contains information about a volume to be created.
type RequestedVolume struct {
Size int `json:"size"`
SourceVolID string `json:"source_volid,omitempty"`
Description string `json:"description,omitempty"`
Name string `json:"name,omitempty"`
ImageRef string `json:"imageRef,omitempty"`
Internal bool `json:"-"`
}
// CreateServerRequest contains the details needed to start new instance(s)
type CreateServerRequest struct {
Server struct {
ID string `json:"id"`
Name string `json:"name"`
Image string `json:"imageRef"`
WorkloadID string `json:"workload_id"`
MaxInstances int `json:"max_count"`
MinInstances int `json:"min_count"`
Metadata map[string]string `json:"metadata,omitempty"`
} `json:"server"`
}
// PrivateAddresses contains information about a single instance network
// interface.
type PrivateAddresses struct {
Addr string `json:"addr"`
MacAddr string `json:"mac_addr"`
}
// ServerDetails contains information about a specific instance.
type ServerDetails struct {
PrivateAddresses []PrivateAddresses `json:"private_addresses"`
Created time.Time `json:"created"`
WorkloadID string `json:"workload_id"`
NodeID string `json:"node_id"`
ID string `json:"id"`
Name string `json:"name"`
Volumes []string `json:"volumes"`
Status string `json:"status"`
TenantID string `json:"tenant_id"`
SSHIP string `json:"ssh_ip"`
SSHPort int `json:"ssh_port"`
}
// Servers holds multiple servers including a count
type Servers struct {
TotalServers int `json:"total_servers"`
Servers []ServerDetails `json:"servers"`
}
// Server holds a single server's worth of details.
type Server struct {
Server ServerDetails `json:"server"`
}
var (
//ErrInstanceNotFound is used if instance not found
ErrInstanceNotFound = errors.New("Instance not found")
// ErrVolumeNotAvailable returned if volume not available
ErrVolumeNotAvailable = errors.New("Volume not available")
// ErrVolumeOwner returned if permission denied
ErrVolumeOwner = errors.New("You are not volume owner")
// ErrVolumeNotAttached returned if volume not attached
ErrVolumeNotAttached = errors.New("Volume not attached")
)
// HTTPErrorData represents the HTTP response body for
// a compute API request error.
type HTTPErrorData struct {
Code int `json:"code"`
Name string `json:"name"`
Message string `json:"message"`
}
// HTTPReturnErrorCode represents the unmarshalled version for Return codes
// when a API call is made and you need to return explicit data of
// the call as OpenStack format
// http://developer.openstack.org/api-guide/compute/faults.html
type HTTPReturnErrorCode struct {
Error HTTPErrorData `json:"error"`
}
// Response contains the http status and any response struct to be marshalled.
type Response struct {
status int
response interface{}
}
func errorResponse(err error) Response {
switch err {
case types.ErrPoolNotFound,
types.ErrTenantNotFound,
types.ErrAddressNotFound,
types.ErrInstanceNotFound,
types.ErrWorkloadNotFound:
return Response{http.StatusNotFound, nil}
case types.ErrQuota,
types.ErrInstanceNotAssigned,
types.ErrDuplicateSubnet,
types.ErrDuplicateIP,
types.ErrInvalidIP,
types.ErrPoolNotEmpty,
types.ErrInvalidPoolAddress,
types.ErrBadRequest,
types.ErrPoolEmpty,
types.ErrDuplicatePoolName,
types.ErrWorkloadInUse:
return Response{http.StatusForbidden, nil}
default:
return Response{http.StatusInternalServerError, nil}
}
}
// Handler is a custom handler for the compute APIs.
// This custom handler allows us to more cleanly return an error and response,
// and pass some package level context into the handler.
type Handler struct {
*Context
Handler func(*Context, http.ResponseWriter, *http.Request) (Response, error)
Privileged bool
}
func (h Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
// check whether we should send permission denied for this route.
if h.Privileged {
privileged := service.GetPrivilege(r.Context())
if !privileged {
http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
return
}
}
// set the content type to whatever was requested.
contentType := r.Header.Get("Content-Type")
resp, err := h.Handler(h.Context, w, r)
if err != nil {
data := HTTPErrorData{
Code: resp.status,
Name: http.StatusText(resp.status),
Message: err.Error(),
}
code := HTTPReturnErrorCode{
Error: data,
}
glog.Warningf("Returning error response to request: %s: %v", r.URL.String(), err)
b, err := json.Marshal(code)
if err != nil {
http.Error(w, http.StatusText(resp.status), resp.status)
return
}
http.Error(w, string(b), resp.status)
return
}
b, err := json.Marshal(resp.response)
if err != nil {
http.Error(w, http.StatusText(http.StatusInternalServerError),
http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", contentType)
w.WriteHeader(resp.status)
_, _ = w.Write(b)
}
func listResources(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
var links []types.APILink
vars := mux.Vars(r)
tenantID, ok := vars["tenant"]
// we support the "pools" resource.
link := types.APILink{
Rel: "pools",
Version: PoolsV1,
MinVersion: PoolsV1,
}
if !ok {
link.Href = fmt.Sprintf("%s/pools", c.URL)
} else {
link.Href = fmt.Sprintf("%s/%s/pools", c.URL, tenantID)
}
links = append(links, link)
// we support the "external-ips" resource
link = types.APILink{
Rel: "external-ips",
Version: ExternalIPsV1,
MinVersion: ExternalIPsV1,
}
if !ok {
link.Href = fmt.Sprintf("%s/external-ips", c.URL)
} else {
link.Href = fmt.Sprintf("%s/%s/external-ips", c.URL, tenantID)
}
links = append(links, link)
// we support the "workloads" resource
link = types.APILink{
Rel: "workloads",
Version: WorkloadsV1,
MinVersion: WorkloadsV1,
}
if !ok {
link.Href = fmt.Sprintf("%s/workloads", c.URL)
} else {
link.Href = fmt.Sprintf("%s/%s/workloads", c.URL, tenantID)
}
links = append(links, link)
// for the "tenants" resource
link = types.APILink{
Rel: "tenants",
Version: TenantsV1,
MinVersion: TenantsV1,
}
if !ok {
link.Href = fmt.Sprintf("%s/tenants", c.URL)
} else {
link.Href = fmt.Sprintf("%s/%s/tenants", c.URL, tenantID)
}
links = append(links, link)
// for the "node" resource
if !ok {
link = types.APILink{
Rel: "node",
Version: NodeV1,
MinVersion: NodeV1,
}
link.Href = fmt.Sprintf("%s/node", c.URL)
links = append(links, link)
}
// for the "images" resource
link = types.APILink{
Rel: "images",
Version: ImagesV1,
MinVersion: ImagesV1,
}
if !ok {
link.Href = fmt.Sprintf("%s/images", c.URL)
} else {
link.Href = fmt.Sprintf("%s/%s/images", c.URL, tenantID)
}
links = append(links, link)
// for the "volumes" resource
if ok {
link = types.APILink{
Rel: "volumes",
Version: VolumesV1,
MinVersion: VolumesV1,
}
link.Href = fmt.Sprintf("%s/%s/volumes", c.URL, tenantID)
links = append(links, link)
}
// for the "instances" resource
if ok {
link = types.APILink{
Rel: "instances",
Version: InstancesV1,
MinVersion: InstancesV1,
}
link.Href = fmt.Sprintf("%s/%s/instances", c.URL, tenantID)
links = append(links, link)
}
return Response{http.StatusOK, links}, nil
}
func showPool(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
ID := vars["pool"]
pool, err := c.ShowPool(ID)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusOK, pool}, nil
}
func listPools(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
var resp types.ListPoolsResponse
vars := mux.Vars(r)
_, ok := vars["tenant"]
pools, err := c.ListPools()
if err != nil {
return errorResponse(err), err
}
queries := r.URL.Query()
names, returnNamedPool := queries["name"]
var match bool
for i, p := range pools {
if returnNamedPool == true {
for _, name := range names {
if name == p.Name {
match = true
}
}
} else {
match = true
}
if match {
summary := types.PoolSummary{
ID: p.ID,
Name: p.Name,
}
if !ok {
summary.TotalIPs = &pools[i].TotalIPs
summary.Free = &pools[i].Free
summary.Links = pools[i].Links
}
resp.Pools = append(resp.Pools, summary)
}
}
if returnNamedPool && !match {
return Response{http.StatusNotFound, nil}, types.ErrPoolNotFound
}
return Response{http.StatusOK, resp}, err
}
func addPool(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
var req types.NewPoolRequest
body, err := ioutil.ReadAll(r.Body)
if err != nil {
return errorResponse(err), err
}
err = json.Unmarshal(body, &req)
if err != nil {
return errorResponse(err), err
}
var ips []string
for _, ip := range req.IPs {
ips = append(ips, ip.IP)
}
_, err = c.AddPool(req.Name, req.Subnet, ips)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusNoContent, nil}, nil
}
func deletePool(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
ID := vars["pool"]
err := c.DeletePool(ID)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusNoContent, nil}, nil
}
func addToPool(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
ID := vars["pool"]
var req types.NewAddressRequest
body, err := ioutil.ReadAll(r.Body)
if err != nil {
return errorResponse(err), err
}
err = json.Unmarshal(body, &req)
if err != nil {
return errorResponse(err), err
}
var ips []string
for _, ip := range req.IPs {
ips = append(ips, ip.IP)
}
err = c.AddAddress(ID, req.Subnet, ips)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusNoContent, nil}, nil
}
func deleteSubnet(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
poolID := vars["pool"]
subnetID := vars["subnet"]
err := c.RemoveAddress(poolID, &subnetID, nil)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusNoContent, nil}, nil
}
func deleteExternalIP(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
poolID := vars["pool"]
IPID := vars["ip_id"]
err := c.RemoveAddress(poolID, nil, &IPID)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusNoContent, nil}, nil
}
func listMappedIPs(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
tenantID, ok := vars["tenant"]
var IPs []types.MappedIP
var short []types.MappedIPShort
if !ok {
IPs = c.ListMappedAddresses(nil)
return Response{http.StatusOK, IPs}, nil
}
IPs = c.ListMappedAddresses(&tenantID)
for _, IP := range IPs {
s := types.MappedIPShort{
ID: IP.ID,
ExternalIP: IP.ExternalIP,
InternalIP: IP.InternalIP,
InstanceID: IP.InstanceID,
Links: IP.Links,
}
short = append(short, s)
}
return Response{http.StatusOK, short}, nil
}
func mapExternalIP(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
var req types.MapIPRequest
body, err := ioutil.ReadAll(r.Body)
if err != nil {
return errorResponse(err), err
}
err = json.Unmarshal(body, &req)
if err != nil {
return errorResponse(err), err
}
tenantID := vars["tenant"]
err = c.MapAddress(tenantID, req.PoolName, req.InstanceID)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusNoContent, nil}, nil
}
func unmapExternalIP(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
tenantID, ok := vars["tenant"]
mappingID := vars["mapping_id"]
var IPs []types.MappedIP
if !ok {
IPs = c.ListMappedAddresses(nil)
} else {
IPs = c.ListMappedAddresses(&tenantID)
}
for _, m := range IPs {
if m.ID == mappingID {
err := c.UnMapAddress(m.ExternalIP)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusAccepted, nil}, nil
}
}
return errorResponse(types.ErrAddressNotFound), types.ErrAddressNotFound
}
func addWorkload(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
var req types.Workload
body, err := ioutil.ReadAll(r.Body)
if err != nil {
return errorResponse(err), err
}
err = json.Unmarshal(body, &req)
if err != nil {
return errorResponse(err), err
}
// we allow admin to create public workloads for any tenant. However,
// users scoped to a particular tenant may only create workloads
// for their own tenant.
vars := mux.Vars(r)
tenantID, ok := vars["tenant"]
req.TenantID = tenantID
if ok {
req.Visibility = types.Private
} else {
req.Visibility = types.Public
}
wl, err := c.CreateWorkload(req)
if err != nil {
return errorResponse(err), err
}
var ref string
if ok {
ref = fmt.Sprintf("%s/%s/workloads/%s", c.URL, tenantID, wl.ID)
} else {
ref = fmt.Sprintf("%s/workloads/%s", c.URL, wl.ID)
}
link := types.Link{
Rel: "self",
Href: ref,
}
resp := types.WorkloadResponse{
Workload: wl,
Link: link,
}
return Response{http.StatusCreated, resp}, nil
}
func deleteWorkload(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
ID := vars["workload_id"]
tenantID, ok := vars["tenant"]
if !ok {
tenantID = "admin"
}
err := c.DeleteWorkload(tenantID, ID)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusNoContent, nil}, nil
}
func showWorkload(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
ID := vars["workload_id"]
tenant, ok := vars["tenant"]
if !ok {
tenant = "admin"
}
wl, err := c.ShowWorkload(tenant, ID)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusOK, wl}, nil
}
func listWorkloads(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
tenant := vars["tenant"]
wls, err := c.ListWorkloads(tenant)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusOK, wls}, nil
}
func listQuotas(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
tenantID, ok := vars["tenant"]
if !ok {
tenantID = vars["for_tenant"]
}
var resp types.QuotaListResponse
resp.Quotas = c.ListQuotas(tenantID)
return Response{http.StatusOK, resp}, nil
}
func updateQuotas(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
tenantID := vars["for_tenant"]
body, err := ioutil.ReadAll(r.Body)
if err != nil {
return errorResponse(err), err
}
var req types.QuotaUpdateRequest
err = json.Unmarshal(body, &req)
if err != nil {
return errorResponse(err), err
}
err = c.UpdateQuotas(tenantID, req.Quotas)
if err != nil {
return errorResponse(err), err
}
var resp types.QuotaListResponse
resp.Quotas = c.ListQuotas(tenantID)
return Response{http.StatusCreated, resp}, nil
}
func changeNodeStatus(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
ID := vars["node_id"]
body, err := ioutil.ReadAll(r.Body)
if err != nil {
return errorResponse(err), err
}
var status types.CiaoNodeStatus
err = json.Unmarshal(body, &status)
if err != nil {
return errorResponse(err), err
}
if status.Status == types.NodeStatusReady {
err = c.RestoreNode(ID)
} else if status.Status == types.NodeStatusMaintenance {
err = c.EvacuateNode(ID)
} else {
err = fmt.Errorf("Cannot transition node %s to %s",
ID, status.Status)
}
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusNoContent, nil}, nil
}
func listTenants(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
var resp types.TenantsListResponse
queries := r.URL.Query()
IDs, returnSingleTenant := queries["id"]
tenants, err := c.ListTenants()
if err != nil {
return errorResponse(err), err
}
if returnSingleTenant != true {
resp.Tenants = tenants
return Response{http.StatusOK, resp}, nil
}
for _, t := range tenants {
for _, tenantID := range IDs {
if t.ID == tenantID {
resp.Tenants = append(resp.Tenants, t)
}
}
}
return Response{http.StatusOK, resp}, nil
}
func showTenant(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
ID := vars["tenant"]
resp, err := c.ShowTenant(ID)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusOK, resp}, nil
}
func updateTenant(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
ID := vars["tenant"]
body, err := ioutil.ReadAll(r.Body)
if err != nil {
return errorResponse(err), err
}
err = c.PatchTenant(ID, body)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusNoContent, nil}, nil
}
func createTenant(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
body, err := ioutil.ReadAll(r.Body)
if err != nil {
return errorResponse(err), err
}
var req types.TenantRequest
err = json.Unmarshal(body, &req)
if err != nil {
return errorResponse(err), err
}
resp, err := c.CreateTenant(req.ID, req.Config)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusCreated, resp}, nil
}
func deleteTenant(c *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
ID := vars["tenant"]
err := c.DeleteTenant(ID)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusNoContent, nil}, nil
}
func validPrivilege(visibility types.Visibility, privileged bool) bool {
return visibility == types.Private || (visibility == types.Public || visibility == types.Internal) && privileged
}
// createImage creates information about an image, but doesn't contain
// any actual image.
func createImage(context *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
tenantID := vars["tenant"]
body, err := ioutil.ReadAll(r.Body)
if err != nil {
return Response{http.StatusBadRequest, nil}, err
}
var req CreateImageRequest
err = json.Unmarshal(body, &req)
if err != nil {
return Response{http.StatusInternalServerError, nil}, err
}
privileged := service.GetPrivilege(r.Context())
if !validPrivilege(req.Visibility, privileged) {
return Response{http.StatusForbidden, nil}, nil
}
resp, err := context.CreateImage(tenantID, req)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusCreated, resp}, nil
}
// listImages returns a list of all created images.
//
// TBD: support query & sort parameters
func listImages(context *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
tenantID, ok := vars["tenant"]
if !ok {
tenantID = "admin"
}
images, err := context.ListImages(tenantID)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusOK, images}, nil
}
// getImage get information about an image by image_id field
//
func getImage(context *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
imageID := vars["image_id"]
tenantID, ok := vars["tenant"]
if !ok {
tenantID = "admin"
}
image, err := context.GetImage(tenantID, imageID)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusOK, image}, nil
}
func uploadImage(context *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
imageID := vars["image_id"]
tenantID, ok := vars["tenant"]
if !ok {
tenantID = "admin"
}
err := context.UploadImage(tenantID, imageID, r.Body)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusNoContent, nil}, nil
}
func deleteImage(context *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
imageID := vars["image_id"]
tenantID, ok := vars["tenant"]
if !ok {
tenantID = "admin"
}
err := context.DeleteImage(tenantID, imageID)
if err != nil {
return errorResponse(err), err
}
return Response{http.StatusNoContent, nil}, nil
}
func createVolume(bc *Context, w http.ResponseWriter, r *http.Request) (Response, error) {
vars := mux.Vars(r)
tenant := vars["tenant"]
body, err := ioutil.ReadAll(r.Body)
if err != nil {
return Response{http.StatusBadRequest, nil}, err
}
var req RequestedVolume
err = json.Unmarshal(body, &req)
if err != nil {
return Response{http.StatusInternalServerError, nil}, err
}
vol, err := bc.CreateVolume(tenant, req)
if err != nil {
return errorResponse(err), err