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localvolume.go
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localvolume.go
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// Copyright (c) 2021 Terminus, Inc.
//
// This program is free software: you can use, redistribute, and/or modify
// it under the terms of the GNU Affero General Public License, version 3
// or later ("AGPL"), as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package driver
import (
"github.com/erda-project/erda/apistructs"
"github.com/erda-project/erda/modules/scheduler/impl/volume"
"github.com/erda-project/erda/pkg/jsonstore"
"github.com/pkg/errors"
)
var (
BadVolumeTypeNotLocalVolume = errors.New("Bad VolumeType, not localvolume")
BadAttachDest = errors.New("Bad Attach dest")
MultiAttachWithLocalVolume = errors.New("multiple attach localvolume")
)
const (
LocalVolumeHostPathPrefix = "/data/volumes"
)
type LocalVolumeDriver struct {
js jsonstore.JsonStore
}
func NewLocalVolumeDriver(js jsonstore.JsonStore) volume.Volume {
return &LocalVolumeDriver{js}
}
func (d LocalVolumeDriver) Type() volume.VolumeType {
return apistructs.LocalVolume
}
func (d LocalVolumeDriver) Create(config volume.VolumeCreateConfig) (volume.VolumeInfo, error) {
if config.Type != apistructs.LocalVolume {
return volume.VolumeInfo{}, BadVolumeTypeNotLocalVolume
}
return defaultCreate(d.js, config)
}
func (d LocalVolumeDriver) Info(ID volume.VolumeIdentity) (volume.VolumeInfo, error) {
return defaultInfo(d.js, ID)
}
func (d LocalVolumeDriver) Attach(ID volume.VolumeIdentity, dst volume.AttachDest) (volume.AttachCallback, error) {
if err := dst.Validate(); err != nil {
return nil, errors.Wrap(BadAttachDest, err.Error())
}
info, err := defaultInfo(d.js, ID)
if err != nil {
return nil, err
}
if info.Type != apistructs.LocalVolume {
return nil, BadVolumeTypeNotLocalVolume
}
ref := volume.VolumeReference{apistructs.AttachDest(dst)}
info.References = append(info.References, ref)
_, err = defaultUpdate(d.js, ID, info)
if err != nil {
return nil, err
}
cb := func(runtime *apistructs.ServiceGroup) (volume.VolumeInfo, error) {
for i, s := range runtime.Services {
if s.Name == dst.Service {
for idx := range s.Volumes {
runtime.Services[i].Volumes[idx].VolumePath = mkLocalVolumeHostPath(info.ID)
}
}
}
return info, nil
}
return cb, nil
}
func (d LocalVolumeDriver) UnAttach(ID volume.VolumeIdentity, dst volume.AttachDest) (volume.VolumeInfo, error) {
if err := dst.Validate(); err != nil {
return volume.VolumeInfo{}, errors.Wrap(BadAttachDest, err.Error())
}
info, err := defaultInfo(d.js, ID)
if err != nil {
return volume.VolumeInfo{}, err
}
newReferences := []volume.VolumeReference{}
for _, ref := range info.References {
if !volume.AttachDest(ref.Info).Equal(dst) {
newReferences = append(newReferences, ref)
}
}
info.References = newReferences
_, err = defaultUpdate(d.js, ID, info)
if err != nil {
return volume.VolumeInfo{}, err
}
return info, nil
}
// For localvolume, Delete does nothing, only clears the metadata. The specific cleanup work is implemented by the localvolume provided by the plugin.
// For example, for marathon, localpv is cleaned up by it
func (d LocalVolumeDriver) Delete(ID volume.VolumeIdentity, force bool) error {
_, err := defaultDelete(d.js, ID)
return err
}
func mkLocalVolumeHostPath(ID string) string {
return ID
}