func (d *driver) createGetSnapshot(
volumeOpts core.VolumeOpts) (*core.Snapshot, error) {
var optSnapshotName string
var optSnapshotID string
optSnapshotName, _ = volumeOpts["snapshotname"]
optSnapshotID, _ = volumeOpts["snapshotid"]
if optSnapshotName == "" && optSnapshotID == "" {
return nil, nil
}
var err error
var snapshots []*core.Snapshot
if snapshots, err = d.r.Storage.GetSnapshot(
"", optSnapshotID, optSnapshotName); err != nil {
return nil, err
}
switch {
case len(snapshots) == 0:
return nil, errors.WithField(
"optSnapshotName", optSnapshotName, "No snapshots returned")
case len(snapshots) > 1:
return nil, errors.WithField(
"optSnapshotName", optSnapshotName, "Too many snapshots returned")
}
return snapshots[0], nil
}
func (d *driver) createInitVolume(
volumeName string,
volumeOpts core.VolumeOpts) (*core.Volume, error) {
var optVolumeName string
var optVolumeID string
optVolumeName, _ = volumeOpts["volumename"]
optVolumeID, _ = volumeOpts["volumeid"]
if optVolumeName == "" && optVolumeID == "" {
return nil, nil
}
var err error
var volumes []*core.Volume
if volumes, err = d.r.Storage.GetVolume(optVolumeID, optVolumeName); err != nil {
return nil, err
}
switch {
case len(volumes) == 0:
return nil, errors.WithField(
"optVolumeName", optVolumeName, "No volumes returned")
case len(volumes) > 1:
return nil, errors.WithField(
"optVolumeName", optVolumeName, "Too many volumes returned")
}
return volumes[0], nil
}
// ParseAddress parses a standard golang network address and returns the
// protocol and path.
func ParseAddress(addr string) (proto string, path string, err error) {
m := netAddrRx.FindStringSubmatch(addr)
if m == nil {
return "", "", errors.WithField("address", addr, "invalid address")
}
return m[1], m[2], nil
}
// GetModuleInstance gets the module instance with the provided instance ID.
func GetModuleInstance(modInstID int32) (*Instance, error) {
modInstancesRwl.RLock()
defer modInstancesRwl.RUnlock()
mod, modExists := modInstances[modInstID]
if !modExists {
return nil,
errors.WithField("id", modInstID, "unknown module instance")
}
return mod, nil
}
func (d *driver) createGetVolumes(
volumeName string,
volumeOpts core.VolumeOpts) ([]*core.Volume, bool, error) {
var err error
var volumes []*core.Volume
if volumes, err = d.r.Storage.GetVolume("", volumeName); err != nil {
return nil, false, err
}
overwriteFs, _ := strconv.ParseBool(volumeOpts["overwritefs"])
switch {
case len(volumes) == 1 && !overwriteFs:
return volumes, overwriteFs, nil
case len(volumes) > 1:
return nil, overwriteFs, errors.WithField(
"volumeName", volumeName, "Too many volumes returned")
}
return volumes, overwriteFs, nil
}
func (m *mod) Start() error {
proto, addr, parseAddrErr := util.ParseAddress(m.Address())
if parseAddrErr != nil {
return parseAddrErr
}
const validProtoPatt = "(?i)^unix|tcp$"
isProtoValid, matchProtoErr := regexp.MatchString(validProtoPatt, proto)
if matchProtoErr != nil {
return errors.WithFieldsE(errors.Fields{
"protocol": proto,
"validProtoPatt": validProtoPatt,
}, "error matching protocol", matchProtoErr)
}
if !isProtoValid {
return errors.WithField("protocol", proto, "invalid protocol")
}
if err := m.r.InitDrivers(); err != nil {
return errors.WithFieldsE(errors.Fields{
"m": m,
"m.r": m.r,
}, "error initializing drivers", err)
}
if err := os.MkdirAll("/etc/docker/plugins", 0755); err != nil {
return err
}
var specPath string
var startFunc func() error
mux := m.buildMux()
if proto == "unix" {
sockFile := addr
sockFileDir := filepath.Dir(sockFile)
mkSockFileDirErr := os.MkdirAll(sockFileDir, 0755)
if mkSockFileDirErr != nil {
return mkSockFileDirErr
}
_ = os.RemoveAll(sockFile)
specPath = m.Address()
startFunc = func() error {
l, lErr := net.Listen("unix", sockFile)
if lErr != nil {
return lErr
}
defer l.Close()
defer os.Remove(sockFile)
return http.Serve(l, mux)
}
} else {
specPath = addr
startFunc = func() error {
s := &http.Server{
Addr: addr,
Handler: mux,
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
MaxHeaderBytes: 1 << 20,
}
return s.ListenAndServe()
}
}
go func() {
sErr := startFunc()
if sErr != nil {
panic(sErr)
}
}()
writeSpecErr := ioutil.WriteFile(
"/etc/docker/plugins/rexray.spec", []byte(specPath), 0644)
if writeSpecErr != nil {
return writeSpecErr
}
return nil
}