/
registry_integration.go
373 lines (304 loc) · 8.33 KB
/
registry_integration.go
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package registry
import (
"sync"
"time"
log "github.com/sirupsen/logrus"
gofig "github.com/akutz/gofig/types"
"github.com/codedellemc/rexray/libstorage/api/context"
"github.com/codedellemc/rexray/libstorage/api/types"
apiutils "github.com/codedellemc/rexray/libstorage/api/utils"
)
type idm struct {
types.IntegrationDriver
sync.RWMutex
ctx types.Context
config gofig.Config
used map[string]int
retryCount int
retryWait time.Duration
}
// NewIntegrationDriverManager returns a new integration driver manager.
func NewIntegrationDriverManager(
d types.IntegrationDriver) types.IntegrationDriver {
return &idm{IntegrationDriver: d, used: map[string]int{}}
}
func (d *idm) Name() string {
return d.IntegrationDriver.Name()
}
func (d *idm) Init(ctx types.Context, config gofig.Config) error {
if err := d.IntegrationDriver.Init(ctx, config); err != nil {
return err
}
d.ctx = ctx
d.config = config
d.used = map[string]int{}
d.retryCount = config.GetInt(types.ConfigIgVolOpsMountRetryCount)
if v := config.GetString(types.ConfigIgVolOpsMountRetryWait); v != "" {
var err error
d.retryWait, err = time.ParseDuration(v)
if err != nil {
return err
}
}
d.initPathCache(ctx)
ctx.WithFields(log.Fields{
types.ConfigIgVolOpsPathCacheEnabled: d.pathCacheEnabled(),
types.ConfigIgVolOpsPathCacheAsync: d.pathCacheAsync(),
types.ConfigIgVolOpsUnmountIgnoreUsed: d.ignoreUsedCount(),
types.ConfigIgVolOpsMountPreempt: d.preempt(),
types.ConfigIgVolOpsCreateDisable: d.disableCreate(),
types.ConfigIgVolOpsRemoveDisable: d.disableRemove(),
}).Info("libStorage integration driver successfully initialized")
return nil
}
var initPathCacheMap = map[string]interface{}{"attachments": true}
func (d *idm) initPathCache(ctx types.Context) {
if !d.pathCacheEnabled() {
ctx.Info("path cache initializion disabled")
return
}
if name, ok := context.ServiceName(ctx); !ok || name == "" {
ctx.Info("path cache initializion disabled; no service name in ctx")
return
}
f := func(async bool) {
ctx.WithField("async", async).Info("initializing the path cache")
_, err := d.List(ctx, apiutils.NewStoreWithData(initPathCacheMap))
if err != nil {
ctx.WithField("async", async).WithError(err).Error(
"error initializing the path cache")
} else {
ctx.WithField("async", async).Debug("initialized the path cache")
}
}
if d.pathCacheAsync() {
go f(true)
} else {
f(false)
}
}
func (d *idm) List(
ctx types.Context,
opts types.Store) ([]types.VolumeMapping, error) {
fields := log.Fields{
"opts": opts}
ctx.WithFields(fields).Debug("listing volumes")
volMaps, err := d.IntegrationDriver.List(ctx.Join(d.ctx), opts)
if err != nil {
return nil, err
}
volMapsWithNames := []types.VolumeMapping{}
for _, vm := range volMaps {
if vm.VolumeName() != "" {
volMapsWithNames = append(volMapsWithNames, vm)
}
}
if !d.pathCacheEnabled() {
return volMapsWithNames, nil
}
for _, vm := range volMapsWithNames {
vmn := vm.VolumeName()
if !d.isCounted(vmn) && vm.MountPoint() != "" {
d.initCount(vmn)
}
}
return volMapsWithNames, nil
}
func (d *idm) Inspect(
ctx types.Context,
volumeName string,
opts types.Store) (types.VolumeMapping, error) {
fields := log.Fields{
"volumeName": volumeName,
"opts": opts}
ctx.WithFields(fields).Debug("inspecting volume")
return d.IntegrationDriver.Inspect(ctx.Join(d.ctx), volumeName, opts)
}
func (d *idm) Mount(
ctx types.Context,
volumeID, volumeName string,
opts *types.VolumeMountOpts) (string, *types.Volume, error) {
opts.Preempt = d.preempt()
fields := log.Fields{
"volumeName": volumeName,
"volumeID": volumeID,
"opts": opts}
ctx.WithFields(fields).Debug("mounting volume")
ctx = ctx.Join(d.ctx)
mp, vol, err := d.IntegrationDriver.Mount(
ctx, volumeID, volumeName, opts)
if err != nil {
for x := 0; x < d.retryCount; x++ {
time.Sleep(d.retryWait)
mp, vol, err = d.IntegrationDriver.Mount(
ctx, volumeID, volumeName, opts)
if err == nil {
break
}
}
if err != nil {
return "", nil, err
}
}
// if the volume has attachments assign the new mount point to the
// MountPoint field of the first attachment element
if len(vol.Attachments) > 0 {
vol.Attachments[0].MountPoint = mp
}
d.incCount(volumeName)
return mp, vol, err
}
func (d *idm) Unmount(
ctx types.Context,
volumeID, volumeName string,
opts types.Store) (*types.Volume, error) {
fields := log.Fields{
"volumeName": volumeName,
"volumeID": volumeID,
"opts": opts}
ctx.WithFields(fields).Debug("unmounting volume")
if d.ignoreUsedCount() ||
d.resetCount(volumeName) ||
!d.isCounted(volumeName) {
d.initCount(volumeName)
return d.IntegrationDriver.Unmount(
ctx.Join(d.ctx), volumeID, volumeName, opts)
}
d.decCount(volumeName)
return nil, nil
}
func (d *idm) Path(
ctx types.Context,
volumeID, volumeName string,
opts types.Store) (string, error) {
fields := log.Fields{
"volumeName": volumeName,
"volumeID": volumeID,
"opts": opts}
ctx.WithFields(fields).Debug("getting path to volume")
if !d.pathCacheEnabled() {
return d.IntegrationDriver.Path(
ctx.Join(d.ctx), volumeID, volumeName, opts)
}
if !d.isCounted(volumeName) {
ctx.WithFields(fields).Debug("skipping path lookup")
return "", nil
}
return d.IntegrationDriver.Path(ctx.Join(d.ctx), volumeID, volumeName, opts)
}
func (d *idm) Create(
ctx types.Context,
volumeName string,
opts *types.VolumeCreateOpts) (*types.Volume, error) {
fields := log.Fields{
"volumeName": volumeName,
"opts": opts}
ctx.WithFields(fields).Debug("creating volume")
if d.disableCreate() {
ctx.Debug("disableRemove skipped creation")
return nil, nil
}
return d.IntegrationDriver.Create(ctx.Join(d.ctx), volumeName, opts)
}
func (d *idm) Remove(
ctx types.Context,
volumeName string,
opts *types.VolumeRemoveOpts) error {
fields := log.Fields{
"volumeName": volumeName,
"opts": opts}
ctx.WithFields(fields).Debug("removing volume")
if d.disableRemove() {
ctx.Debug("disableRemove skipped deletion")
return nil
}
return d.IntegrationDriver.Remove(ctx.Join(d.ctx), volumeName, opts)
}
func (d *idm) Attach(
ctx types.Context,
volumeName string,
opts *types.VolumeAttachOpts) (string, error) {
fields := log.Fields{
"volumeName": volumeName,
"opts": opts}
ctx.WithFields(fields).Debug("attaching volume")
return d.IntegrationDriver.Attach(ctx.Join(d.ctx), volumeName, opts)
}
func (d *idm) Detach(
ctx types.Context,
volumeName string,
opts *types.VolumeDetachOpts) error {
fields := log.Fields{
"volumeName": volumeName,
"opts": opts}
ctx.WithFields(fields).Debug("detaching volume")
return d.IntegrationDriver.Detach(ctx.Join(d.ctx), volumeName, opts)
}
func (d *idm) initCount(volumeName string) {
d.Lock()
defer d.Unlock()
d.used[volumeName] = 0
d.ctx.WithFields(log.Fields{
"volumeName": volumeName,
"count": 0,
}).Debug("init count")
}
func (d *idm) resetCount(volumeName string) bool {
d.Lock()
defer d.Unlock()
c, ok := d.used[volumeName]
if ok && c < 2 {
d.ctx.WithFields(log.Fields{
"volumeName": volumeName,
"count": c,
}).Info("count reset")
d.used[volumeName] = 0
return true
}
return false
}
func (d *idm) addCount(volumeName string, delta int) {
d.Lock()
defer d.Unlock()
c, ok := d.used[volumeName]
if ok {
c = c + delta
} else {
c = 1
}
d.used[volumeName] = c
d.ctx.WithFields(log.Fields{
"volumeName": volumeName,
"count": c,
}).Debug("set count")
}
func (d *idm) isCounted(volumeName string) bool {
d.RLock()
defer d.RUnlock()
_, ok := d.used[volumeName]
return ok
}
func (d *idm) incCount(volumeName string) {
d.addCount(volumeName, 1)
}
func (d *idm) decCount(volumeName string) {
d.addCount(volumeName, -1)
}
func (d *idm) preempt() bool {
return d.config.GetBool(types.ConfigIgVolOpsMountPreempt)
}
func (d *idm) disableCreate() bool {
return d.config.GetBool(types.ConfigIgVolOpsCreateDisable)
}
func (d *idm) disableRemove() bool {
return d.config.GetBool(types.ConfigIgVolOpsRemoveDisable)
}
func (d *idm) ignoreUsedCount() bool {
return d.config.GetBool(types.ConfigIgVolOpsUnmountIgnoreUsed)
}
func (d *idm) pathCacheEnabled() bool {
return d.config.GetBool(types.ConfigIgVolOpsPathCacheEnabled)
}
func (d *idm) pathCacheAsync() bool {
return d.config.GetBool(types.ConfigIgVolOpsPathCacheAsync)
}