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s3_driver.go
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s3_driver.go
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package s3driver
import (
"code.cloudfoundry.org/dockerdriver"
"code.cloudfoundry.org/dockerdriver/driverhttp"
"code.cloudfoundry.org/dockerdriver/invoker"
"code.cloudfoundry.org/goshims/filepathshim"
"code.cloudfoundry.org/goshims/ioutilshim"
"code.cloudfoundry.org/goshims/osshim"
"code.cloudfoundry.org/goshims/timeshim"
"code.cloudfoundry.org/lager"
"context"
"errors"
"fmt"
"github.com/cloudfoundry/volumedriver/mountchecker"
"github.com/mitchellh/mapstructure"
"sync"
"time"
)
type S3VolumeInfo struct {
ConnectionInfo ConnectionInfo
mountError string
dockerdriver.VolumeInfo
}
type ConnectionInfo struct {
AccessKeyId string `mapstructure:"access_key_id" json:"-"`
Bucket string `mapstructure:"bucket"`
SecretAccessKey string `mapstructure:"secret_access_key" json:"-"`
Endpoint string `mapstructure:"endpoint"`
Region string `mapstructure:"region"`
RegionSet bool `mapstructure:"region_set"`
StorageClass string `mapstructure:"storage_class"`
UseContentType bool `mapstructure:"use_content_type"`
UseSSE bool `mapstructure:"use_sse"`
UseKMS bool `mapstructure:"use_kms"`
KMSKeyID string `mapstructure:"kms_key_id" json:"-"`
ACL string `mapstructure:"acl"`
Subdomain bool `mapstructure:"subdomain"`
MountOptions map[string]string `mapstructure:"mount_options"`
}
type OsHelper interface {
Umask(mask int) (oldmask int)
}
type S3Driver struct {
volumes map[string]*S3VolumeInfo
volumesLock sync.RWMutex
os osshim.Os
filepath filepathshim.Filepath
ioutil ioutilshim.Ioutil
time timeshim.Time
mountChecker mountchecker.MountChecker
mountPathRoot string
osHelper OsHelper
invoker invoker.Invoker
mounterPath string
}
func NewS3Driver(
logger lager.Logger,
os osshim.Os,
filepath filepathshim.Filepath,
ioutil ioutilshim.Ioutil,
time timeshim.Time,
mountChecker mountchecker.MountChecker,
mountPathRoot string,
oshelper OsHelper,
invoker invoker.Invoker,
mounterPath string,
) *S3Driver {
d := &S3Driver{
volumes: map[string]*S3VolumeInfo{},
os: os,
filepath: filepath,
ioutil: ioutil,
time: time,
mountChecker: mountChecker,
mountPathRoot: mountPathRoot,
osHelper: oshelper,
invoker: invoker,
mounterPath: mounterPath,
}
ctx := context.TODO()
env := driverhttp.NewHttpDriverEnv(logger, ctx)
d.restoreState(env)
return d
}
func (d S3Driver) Activate(env dockerdriver.Env) dockerdriver.ActivateResponse {
return dockerdriver.ActivateResponse{
Implements: []string{"VolumeDriver"},
}
}
func (d S3Driver) Get(env dockerdriver.Env, getRequest dockerdriver.GetRequest) dockerdriver.GetResponse {
volume, err := d.getVolume(env, getRequest.Name)
if err != nil {
return dockerdriver.GetResponse{Err: err.Error()}
}
return dockerdriver.GetResponse{
Volume: dockerdriver.VolumeInfo{
Name: getRequest.Name,
Mountpoint: volume.Mountpoint,
},
}
}
func (d S3Driver) getVolume(env dockerdriver.Env, volumeName string) (*S3VolumeInfo, error) {
logger := env.Logger().Session("get-volume")
d.volumesLock.RLock()
defer d.volumesLock.RUnlock()
if vol, ok := d.volumes[volumeName]; ok {
logger.Info("getting-volume", lager.Data{"name": volumeName})
return vol, nil
}
return &S3VolumeInfo{}, errors.New("Volume not found")
}
func (d S3Driver) List(env dockerdriver.Env) dockerdriver.ListResponse {
d.volumesLock.RLock()
defer d.volumesLock.RUnlock()
listResponse := dockerdriver.ListResponse{
Volumes: []dockerdriver.VolumeInfo{},
}
for _, volume := range d.volumes {
if volume.MountCount == 0 {
continue
}
listResponse.Volumes = append(listResponse.Volumes, volume.VolumeInfo)
}
listResponse.Err = ""
return listResponse
}
func (d S3Driver) Path(env dockerdriver.Env, pathRequest dockerdriver.PathRequest) dockerdriver.PathResponse {
logger := env.Logger().Session("path", lager.Data{"volume": pathRequest.Name})
fmt.Println(pathRequest)
if pathRequest.Name == "" {
return dockerdriver.PathResponse{Err: "Missing mandatory 'volume_name'"}
}
vol, err := d.getVolume(driverhttp.EnvWithLogger(logger, env), pathRequest.Name)
if err != nil {
logger.Error("failed-no-such-volume-found", err, lager.Data{"mountpoint": vol.Mountpoint})
return dockerdriver.PathResponse{Err: fmt.Sprintf("Volume '%s' not found", pathRequest.Name)}
}
if vol.Mountpoint == "" {
errText := "Volume not previously mounted"
logger.Error("failed-mountpoint-not-assigned", errors.New(errText))
return dockerdriver.PathResponse{Err: errText}
}
return dockerdriver.PathResponse{Mountpoint: vol.Mountpoint}
}
func (d *S3Driver) Create(env dockerdriver.Env, createRequest dockerdriver.CreateRequest) dockerdriver.ErrorResponse {
logger := env.Logger().Session("create")
logger.Info("start")
defer logger.Info("end")
if createRequest.Name == "" {
return dockerdriver.ErrorResponse{Err: "Missing mandatory 'volume_name'"}
}
var connInfo ConnectionInfo
err := mapstructure.Decode(createRequest.Opts, &connInfo)
if err != nil {
return dockerdriver.ErrorResponse{Err: err.Error()}
}
if connInfo.Bucket == "" {
return dockerdriver.ErrorResponse{Err: "Missing mandatory 'bucket' field in 'Opts'"}
}
if connInfo.AccessKeyId == "" {
return dockerdriver.ErrorResponse{Err: "Missing mandatory 'access_key_id' field in 'Opts'"}
}
if connInfo.SecretAccessKey == "" {
return dockerdriver.ErrorResponse{Err: "Missing mandatory 'secret_access_key' field in 'Opts'"}
}
existing, err := d.getVolume(driverhttp.EnvWithLogger(logger, env), createRequest.Name)
if err != nil {
logger.Info("creating-volume", lager.Data{"volume_name": createRequest.Name})
logger.Info("with-opts", lager.Data{"opts": createRequest.Opts})
volInfo := S3VolumeInfo{
VolumeInfo: dockerdriver.VolumeInfo{Name: createRequest.Name},
ConnectionInfo: connInfo,
}
d.volumesLock.Lock()
defer d.volumesLock.Unlock()
d.volumes[createRequest.Name] = &volInfo
} else {
existing.ConnectionInfo = connInfo
d.volumesLock.Lock()
defer d.volumesLock.Unlock()
d.volumes[createRequest.Name] = existing
}
err = d.persistState(driverhttp.EnvWithLogger(logger, env))
if err != nil {
logger.Error("persist-state-failed", err)
return dockerdriver.ErrorResponse{Err: fmt.Sprintf("persist state failed when creating: %s", err.Error())}
}
return dockerdriver.ErrorResponse{}
}
func (d *S3Driver) Remove(env dockerdriver.Env, removeRequest dockerdriver.RemoveRequest) dockerdriver.ErrorResponse {
logger := env.Logger().Session("remove", lager.Data{"volume": removeRequest})
logger.Info("start")
defer logger.Info("end")
if removeRequest.Name == "" {
return dockerdriver.ErrorResponse{Err: "Missing mandatory 'volume_name'"}
}
vol, err := d.getVolume(driverhttp.EnvWithLogger(logger, env), removeRequest.Name)
if err != nil {
logger.Error("warning-volume-removal", fmt.Errorf(fmt.Sprintf("Volume %s not found", removeRequest.Name)))
return dockerdriver.ErrorResponse{}
}
if vol.Mountpoint != "" {
if err := d.unmount(driverhttp.EnvWithLogger(logger, env).Logger(), removeRequest.Name, vol.Mountpoint, vol.Name); err != nil {
return dockerdriver.ErrorResponse{Err: err.Error()}
}
}
logger.Info("removing-volume", lager.Data{"name": removeRequest.Name})
d.volumesLock.Lock()
defer d.volumesLock.Unlock()
delete(d.volumes, removeRequest.Name)
if err := d.persistState(driverhttp.EnvWithLogger(logger, env)); err != nil {
return dockerdriver.ErrorResponse{Err: fmt.Sprintf("failed to persist state when removing: %s", err.Error())}
}
return dockerdriver.ErrorResponse{}
}
func (d S3Driver) Capabilities(env dockerdriver.Env) dockerdriver.CapabilitiesResponse {
return dockerdriver.CapabilitiesResponse{
Capabilities: dockerdriver.CapabilityInfo{Scope: "local"},
}
}
func (d *S3Driver) check(env dockerdriver.Env, name, mountPoint string) bool {
ctx, cncl := context.WithDeadline(context.TODO(), time.Now().Add(time.Second*5))
defer cncl()
env = driverhttp.EnvWithContext(ctx, env)
_, err := d.invoker.Invoke(env, "mountpoint", []string{"-q", mountPoint})
if err != nil {
// Note: Created volumes (with no mounts) will be removed
// since VolumeInfo.Mountpoint will be an empty string
env.Logger().Info(fmt.Sprintf("unable to verify volume %s (%s)", name, err.Error()))
return false
}
return true
}