forked from rexray/rexray
/
volume.go
142 lines (114 loc) · 3.7 KB
/
volume.go
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package volume
import (
log "github.com/Sirupsen/logrus"
"github.com/emccode/rexray/config"
"github.com/emccode/rexray/errors"
osm "github.com/emccode/rexray/os"
"github.com/emccode/rexray/storage"
"github.com/emccode/rexray/util"
)
var driverInitFuncs map[string]InitFunc
type InitFunc func(
osDriverManager *osm.OSDriverManager,
storageDriverManager *storage.StorageDriverManager) (Driver, error)
func init() {
driverInitFuncs = make(map[string]InitFunc)
}
func Register(name string, initFunc InitFunc) {
driverInitFuncs[name] = initFunc
}
type VolumeDriverManager struct {
Drivers map[string]Driver
}
func NewVolumeDriverManager(
conf *config.Config,
osDriverManager *osm.OSDriverManager,
storageDriverManager *storage.StorageDriverManager) (*VolumeDriverManager, error) {
vd, vdErr := getDrivers(conf, osDriverManager, storageDriverManager)
if vdErr != nil {
return nil, vdErr
}
if len(vd) == 0 {
return nil, errors.New("no volume drivers initialized")
}
return &VolumeDriverManager{
Drivers: vd,
}, nil
}
func (vdm *VolumeDriverManager) IsDrivers() bool {
return len(vdm.Drivers) > 0
}
func getDrivers(
conf *config.Config,
osdm *osm.OSDriverManager,
sdm *storage.StorageDriverManager) (map[string]Driver, error) {
driverNames := conf.VolumeDrivers
log.WithFields(log.Fields{
"driverInitFuncs": driverInitFuncs,
"driverNames": driverNames}).Debug("getting driver instances")
drivers := map[string]Driver{}
for name, initFunc := range driverInitFuncs {
if len(driverNames) > 0 && !util.StringInSlice(name, driverNames) {
continue
}
var initErr error
drivers[name], initErr = initFunc(osdm, sdm)
if initErr != nil {
log.WithFields(log.Fields{
"driverName": name,
"error": initErr}).Debug("error initializing driver")
delete(drivers, name)
continue
}
log.WithField("driverName", name).Debug("initialized driver")
}
return drivers, nil
}
func (vdm *VolumeDriverManager) Mount(volumeName, volumeID string, overwriteFs bool, newFsType string) (string, error) {
for _, driver := range vdm.Drivers {
return driver.Mount(volumeName, volumeID, overwriteFs, newFsType)
}
return "", errors.New("no volume manager specified")
}
func (vdm *VolumeDriverManager) Unmount(volumeName, volumeID string) error {
for _, driver := range vdm.Drivers {
return driver.Unmount(volumeName, volumeID)
}
return errors.New("no volume manager specified")
}
func (vdm *VolumeDriverManager) Path(volumeName, volumeID string) (string, error) {
for _, driver := range vdm.Drivers {
return driver.Path(volumeName, volumeID)
}
return "", errors.New("no volume manager specified")
}
func (vdm *VolumeDriverManager) Create(volumeName string, volumeOpts VolumeOpts) error {
for _, driver := range vdm.Drivers {
return driver.Create(volumeName, volumeOpts)
}
return errors.New("no volume manager specified")
}
func (vdm *VolumeDriverManager) Remove(volumeName string) error {
for _, driver := range vdm.Drivers {
return driver.Remove(volumeName)
}
return errors.New("no volume manager specified")
}
func (vdm *VolumeDriverManager) Attach(volumeName, instanceID string) (string, error) {
for _, driver := range vdm.Drivers {
return driver.Attach(volumeName, instanceID)
}
return "", errors.New("no volume manager specified")
}
func (vdm *VolumeDriverManager) Detach(volumeName, instanceID string) error {
for _, driver := range vdm.Drivers {
return driver.Detach(volumeName, instanceID)
}
return errors.New("no volume manager specified")
}
func (vdm *VolumeDriverManager) NetworkName(volumeName, instanceID string) (string, error) {
for _, driver := range vdm.Drivers {
return driver.NetworkName(volumeName, instanceID)
}
return "", errors.New("no volume manager specified")
}