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ontap_san.go
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ontap_san.go
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// Copyright 2018 NetApp, Inc. All Rights Reserved.
package ontap
import (
"errors"
"fmt"
"net"
"strconv"
"strings"
"github.com/RoaringBitmap/roaring"
log "github.com/sirupsen/logrus"
tridentconfig "github.com/netapp/trident/config"
"github.com/netapp/trident/storage"
sa "github.com/netapp/trident/storage_attribute"
drivers "github.com/netapp/trident/storage_drivers"
"github.com/netapp/trident/storage_drivers/ontap/api"
"github.com/netapp/trident/storage_drivers/ontap/api/azgo"
"github.com/netapp/trident/utils"
)
const LUNAttributeFSType = "com.netapp.ndvp.fstype"
func lunPath(name string) string {
return fmt.Sprintf("/vol/%v/lun0", name)
}
// SANStorageDriver is for iSCSI storage provisioning
type SANStorageDriver struct {
initialized bool
Config drivers.OntapStorageDriverConfig
ips []string
API *api.Client
Telemetry *Telemetry
}
func (d *SANStorageDriver) GetConfig() *drivers.OntapStorageDriverConfig {
return &d.Config
}
func (d *SANStorageDriver) GetAPI() *api.Client {
return d.API
}
func (d *SANStorageDriver) GetTelemetry() *Telemetry {
d.Telemetry.Telemetry = tridentconfig.OrchestratorTelemetry
return d.Telemetry
}
// Name is for returning the name of this driver
func (d SANStorageDriver) Name() string {
return drivers.OntapSANStorageDriverName
}
// Initialize from the provided config
func (d *SANStorageDriver) Initialize(
context tridentconfig.DriverContext, configJSON string, commonConfig *drivers.CommonStorageDriverConfig,
) error {
if commonConfig.DebugTraceFlags["method"] {
fields := log.Fields{"Method": "Initialize", "Type": "SANStorageDriver"}
log.WithFields(fields).Debug(">>>> Initialize")
defer log.WithFields(fields).Debug("<<<< Initialize")
}
// Parse the config
config, err := InitializeOntapConfig(context, configJSON, commonConfig)
if err != nil {
return fmt.Errorf("error initializing %s driver: %v", d.Name(), err)
}
if config.IgroupName == "" {
config.IgroupName = drivers.GetDefaultIgroupName(context)
}
d.API, err = InitializeOntapDriver(config)
if err != nil {
return fmt.Errorf("error initializing %s driver: %v", d.Name(), err)
}
d.Config = *config
d.ips, err = d.API.NetInterfaceGetDataLIFs("iscsi")
if err != nil {
return err
}
if len(d.ips) == 0 {
return fmt.Errorf("no iSCSI data LIFs found on SVM %s", d.Config.SVM)
} else {
log.WithField("dataLIFs", d.ips).Debug("Found iSCSI LIFs.")
}
err = d.validate()
if err != nil {
return fmt.Errorf("error validating %s driver: %v", d.Name(), err)
}
// Create igroup
igroupResponse, err := d.API.IgroupCreate(d.Config.IgroupName, "iscsi", "linux")
if err != nil {
return fmt.Errorf("error creating igroup: %v", err)
}
if zerr := api.NewZapiError(igroupResponse); !zerr.IsPassed() {
// Handle case where the igroup already exists
if zerr.Code() != azgo.EVDISK_ERROR_INITGROUP_EXISTS {
return fmt.Errorf("error creating igroup %v: %v", d.Config.IgroupName, zerr)
}
}
if context == tridentconfig.ContextKubernetes {
log.WithFields(log.Fields{
"driver": drivers.OntapSANStorageDriverName,
"SVM": d.Config.SVM,
"igroup": d.Config.IgroupName,
}).Warn("Please ensure all relevant hosts are added to the initiator group.")
}
// Set up the autosupport heartbeat
d.Telemetry = NewOntapTelemetry(d)
d.Telemetry.Start()
d.initialized = true
return nil
}
func (d *SANStorageDriver) Initialized() bool {
return d.initialized
}
func (d *SANStorageDriver) Terminate() {
if d.Config.DebugTraceFlags["method"] {
fields := log.Fields{"Method": "Terminate", "Type": "SANStorageDriver"}
log.WithFields(fields).Debug(">>>> Terminate")
defer log.WithFields(fields).Debug("<<<< Terminate")
}
d.Telemetry.Stop()
d.initialized = false
}
// Validate the driver configuration and execution environment
func (d *SANStorageDriver) validate() error {
if d.Config.DebugTraceFlags["method"] {
fields := log.Fields{"Method": "validate", "Type": "SANStorageDriver"}
log.WithFields(fields).Debug(">>>> validate")
defer log.WithFields(fields).Debug("<<<< validate")
}
// If the user sets the LIF to use in the config, disable multipathing and use just the one IP address
if d.Config.DataLIF != "" {
// Make sure it's actually a valid address
if ip := net.ParseIP(d.Config.DataLIF); nil == ip {
return fmt.Errorf("data LIF is not a valid IP: %s", d.Config.DataLIF)
}
// Make sure the IP matches one of the LIFs
found := false
for _, ip := range d.ips {
if d.Config.DataLIF == ip {
found = true
break
}
}
if found {
log.WithField("ip", d.Config.DataLIF).Debug("Found matching Data LIF.")
} else {
log.WithField("ip", d.Config.DataLIF).Debug("Could not find matching Data LIF.")
return fmt.Errorf("could not find Data LIF for %s", d.Config.DataLIF)
}
// Replace the IPs with a singleton list
d.ips = []string{d.Config.DataLIF}
}
if d.Config.DriverContext == tridentconfig.ContextDocker {
// Make sure this host is logged into the ONTAP iSCSI target
err := utils.EnsureISCSISessions(d.ips)
if err != nil {
return fmt.Errorf("error establishing iSCSI session: %v", err)
}
}
return nil
}
// Create a volume+LUN with the specified options
func (d *SANStorageDriver) Create(name string, sizeBytes uint64, opts map[string]string) error {
if d.Config.DebugTraceFlags["method"] {
fields := log.Fields{
"Method": "Create",
"Type": "SANStorageDriver",
"name": name,
"sizeBytes": sizeBytes,
"opts": opts,
}
log.WithFields(fields).Debug(">>>> Create")
defer log.WithFields(fields).Debug("<<<< Create")
}
// If the volume already exists, bail out
volExists, err := d.API.VolumeExists(name)
if err != nil {
return fmt.Errorf("error checking for existing volume: %v", err)
}
if volExists {
return fmt.Errorf("volume %s already exists", name)
}
sizeBytes, err = GetVolumeSize(sizeBytes, d.Config)
if err != nil {
return err
}
// Get options with default fallback values
// see also: ontap_common.go#PopulateConfigurationDefaults
size := strconv.FormatUint(sizeBytes, 10)
spaceReserve := utils.GetV(opts, "spaceReserve", d.Config.SpaceReserve)
snapshotPolicy := utils.GetV(opts, "snapshotPolicy", d.Config.SnapshotPolicy)
snapshotReserve := utils.GetV(opts, "snapshotReserve", d.Config.SnapshotReserve)
unixPermissions := utils.GetV(opts, "unixPermissions", d.Config.UnixPermissions)
snapshotDir := utils.GetV(opts, "snapshotDir", d.Config.SnapshotDir)
exportPolicy := utils.GetV(opts, "exportPolicy", d.Config.ExportPolicy)
aggregate := utils.GetV(opts, "aggregate", d.Config.Aggregate)
securityStyle := utils.GetV(opts, "securityStyle", d.Config.SecurityStyle)
encryption := utils.GetV(opts, "encryption", d.Config.Encryption)
if aggrLimitsErr := checkAggregateLimits(aggregate, spaceReserve, sizeBytes, d.Config, d.GetAPI()); aggrLimitsErr != nil {
return aggrLimitsErr
}
if _, _, checkVolumeSizeLimitsError := drivers.CheckVolumeSizeLimits(sizeBytes, d.Config.CommonStorageDriverConfig); checkVolumeSizeLimitsError != nil {
return checkVolumeSizeLimitsError
}
encrypt, err := ValidateEncryptionAttribute(encryption, d.API)
if err != nil {
return err
}
snapshotReserveInt, err := GetSnapshotReserve(snapshotPolicy, snapshotReserve)
if err != nil {
return fmt.Errorf("invalid value for snapshotReserve: %v", err)
}
// Check for a supported file system type
fstype := strings.ToLower(utils.GetV(opts, "fstype|fileSystemType", d.Config.FileSystemType))
switch fstype {
case "xfs", "ext3", "ext4":
log.WithFields(log.Fields{"fileSystemType": fstype, "name": name}).Debug("Filesystem format.")
default:
return fmt.Errorf("unsupported fileSystemType option: %s", fstype)
}
log.WithFields(log.Fields{
"name": name,
"size": size,
"spaceReserve": spaceReserve,
"snapshotPolicy": snapshotPolicy,
"snapshotReserve": snapshotReserveInt,
"unixPermissions": unixPermissions,
"snapshotDir": snapshotDir,
"exportPolicy": exportPolicy,
"aggregate": aggregate,
"securityStyle": securityStyle,
"encryption": encryption,
}).Debug("Creating Flexvol.")
// Create the volume
volCreateResponse, err := d.API.VolumeCreate(
name, aggregate, size, spaceReserve, snapshotPolicy,
unixPermissions, exportPolicy, securityStyle, encrypt, snapshotReserveInt)
if err = api.GetError(volCreateResponse, err); err != nil {
if zerr, ok := err.(api.ZapiError); ok {
// Handle case where the Create is passed to every Docker Swarm node
if zerr.Code() == azgo.EAPIERROR && strings.HasSuffix(strings.TrimSpace(zerr.Reason()), "Job exists") {
log.WithField("volume", name).Warn("Volume create job already exists, " +
"skipping volume create on this node.")
return nil
}
}
return fmt.Errorf("error creating volume: %v", err)
}
lunPath := lunPath(name)
osType := "linux"
// Create the LUN
lunCreateResponse, err := d.API.LunCreate(lunPath, int(sizeBytes), osType, false)
if err = api.GetError(lunCreateResponse, err); err != nil {
return fmt.Errorf("error creating LUN: %v", err)
}
// Save the fstype in a LUN attribute so we know what to do in Attach
attrResponse, err := d.API.LunSetAttribute(lunPath, LUNAttributeFSType, fstype)
if err = api.GetError(attrResponse, err); err != nil {
defer d.API.LunDestroy(lunPath)
return fmt.Errorf("error saving file system type for LUN: %v", err)
}
// Save the context
attrResponse, err = d.API.LunSetAttribute(lunPath, "context", string(d.Config.DriverContext))
if err = api.GetError(attrResponse, err); err != nil {
log.WithField("name", name).Warning("Failed to save the driver context attribute for new volume.")
}
return nil
}
// Create a volume clone
func (d *SANStorageDriver) CreateClone(name, source, snapshot string, opts map[string]string) error {
if d.Config.DebugTraceFlags["method"] {
fields := log.Fields{
"Method": "CreateClone",
"Type": "SANStorageDriver",
"name": name,
"source": source,
"snapshot": snapshot,
"opts": opts,
}
log.WithFields(fields).Debug(">>>> CreateClone")
defer log.WithFields(fields).Debug("<<<< CreateClone")
}
split, err := strconv.ParseBool(utils.GetV(opts, "splitOnClone", d.Config.SplitOnClone))
if err != nil {
return fmt.Errorf("invalid boolean value for splitOnClone: %v", err)
}
log.WithField("splitOnClone", split).Debug("Creating volume clone.")
return CreateOntapClone(name, source, snapshot, split, &d.Config, d.API)
}
// Destroy the requested (volume,lun) storage tuple
func (d *SANStorageDriver) Destroy(name string) error {
if d.Config.DebugTraceFlags["method"] {
fields := log.Fields{
"Method": "Destroy",
"Type": "SANStorageDriver",
"name": name,
}
log.WithFields(fields).Debug(">>>> Destroy")
defer log.WithFields(fields).Debug("<<<< Destroy")
}
var (
err error
iSCSINodeName string
lunID int
)
// Validate Flexvol exists before trying to destroy
volExists, err := d.API.VolumeExists(name)
if err != nil {
return fmt.Errorf("error checking for existing volume: %v", err)
}
if !volExists {
log.WithField("volume", name).Debug("Volume already deleted, skipping destroy.")
return nil
}
if d.Config.DriverContext == tridentconfig.ContextDocker {
// Get target info
iSCSINodeName, _, err = d.getISCSITargetInfo()
if err != nil {
log.WithField("error", err).Error("Could not get target info.")
return err
}
// Get the LUN ID
lunPath := fmt.Sprintf("/vol/%s/lun0", name)
lunMapResponse, err := d.API.LunMapListInfo(lunPath)
if err != nil {
return fmt.Errorf("error reading LUN maps for volume %s: %v", name, err)
}
lunID = -1
for _, lunMapResponse := range lunMapResponse.Result.InitiatorGroups() {
if lunMapResponse.InitiatorGroupName() == d.Config.IgroupName {
lunID = lunMapResponse.LunId()
}
}
if lunID >= 0 {
// Inform the host about the device removal
utils.PrepareDeviceForRemoval(lunID, iSCSINodeName)
}
}
// Delete the Flexvol & LUN
volDestroyResponse, err := d.API.VolumeDestroy(name, true)
if err != nil {
return fmt.Errorf("error destroying volume %v: %v", name, err)
}
if zerr := api.NewZapiError(volDestroyResponse); !zerr.IsPassed() {
// Handle case where the Destroy is passed to every Docker Swarm node
if zerr.Code() == azgo.EVOLUMEDOESNOTEXIST {
log.WithField("volume", name).Warn("Volume already deleted.")
} else {
return fmt.Errorf("error destroying volume %v: %v", name, zerr)
}
}
return nil
}
// Publish the volume to the host specified in publishInfo. This method may or may not be running on the host
// where the volume will be mounted, so it should limit itself to updating access rules, initiator groups, etc.
// that require some host identity (but not locality) as well as storage controller API access.
func (d *SANStorageDriver) Publish(name string, publishInfo *utils.VolumePublishInfo) error {
if d.Config.DebugTraceFlags["method"] {
fields := log.Fields{
"Method": "Publish",
"Type": "SANStorageDriver",
"name": name,
}
log.WithFields(fields).Debug(">>>> Publish")
defer log.WithFields(fields).Debug("<<<< Publish")
}
var iqn string
var err error
lunPath := lunPath(name)
igroupName := d.Config.IgroupName
if publishInfo.Localhost {
// Lookup local host IQNs
iqns, err := utils.GetInitiatorIqns()
if err != nil {
return fmt.Errorf("error determining host initiator IQN: %v", err)
} else if len(iqns) == 0 {
return errors.New("could not determine host initiator IQN")
}
iqn = iqns[0]
} else {
// Host IQN must have been passed in
if len(publishInfo.HostIQN) == 0 {
return errors.New("host initiator IQN not specified")
}
iqn = publishInfo.HostIQN[0]
}
// Get target info
iSCSINodeName, _, err := d.getISCSITargetInfo()
if err != nil {
return err
}
// Get the fstype
fstype := DefaultFileSystemType
attrResponse, err := d.API.LunGetAttribute(lunPath, LUNAttributeFSType)
if err = api.GetError(attrResponse, err); err != nil {
log.WithFields(log.Fields{
"LUN": lunPath,
"fstype": fstype,
}).Warn("LUN attribute fstype not found, using default.")
} else {
fstype = attrResponse.Result.Value()
log.WithFields(log.Fields{"LUN": lunPath, "fstype": fstype}).Debug("Found LUN attribute fstype.")
}
// Add IQN to igroup
igroupAddResponse, err := d.API.IgroupAdd(igroupName, iqn)
err = api.GetError(igroupAddResponse, err)
zerr, zerrOK := err.(api.ZapiError)
if err == nil || (zerrOK && zerr.Code() == azgo.EVDISK_ERROR_INITGROUP_HAS_NODE) {
log.WithFields(log.Fields{
"IQN": iqn,
"igroup": igroupName,
}).Debug("Host IQN already in igroup.")
} else {
return fmt.Errorf("error adding IQN %v to igroup %v: %v", iqn, igroupName, err)
}
// Map LUN (it may already be mapped)
lunID, err := d.API.LunMapIfNotMapped(igroupName, lunPath)
if err != nil {
return err
}
// Add fields needed by Attach
publishInfo.IscsiLunNumber = int32(lunID)
publishInfo.IscsiTargetPortal = d.ips[0]
publishInfo.IscsiPortals = d.ips[1:]
publishInfo.IscsiTargetIQN = iSCSINodeName
publishInfo.IscsiIgroup = igroupName
publishInfo.FilesystemType = fstype
publishInfo.UseCHAP = false
publishInfo.SharedTarget = true
return nil
}
func (d *SANStorageDriver) getISCSITargetInfo() (iSCSINodeName string, iSCSIInterfaces []string, returnError error) {
// Get the SVM iSCSI IQN
nodeNameResponse, err := d.API.IscsiNodeGetNameRequest()
if err != nil {
returnError = fmt.Errorf("could not get SVM iSCSI node name: %v", err)
return
}
iSCSINodeName = nodeNameResponse.Result.NodeName()
// Get the SVM iSCSI interfaces
interfaceResponse, err := d.API.IscsiInterfaceGetIterRequest()
if err != nil {
returnError = fmt.Errorf("could not get SVM iSCSI interfaces: %v", err)
return
}
for _, iscsiAttrs := range interfaceResponse.Result.AttributesList() {
if !iscsiAttrs.IsInterfaceEnabled() {
continue
}
iSCSIInterface := fmt.Sprintf("%s:%d", iscsiAttrs.IpAddress(), iscsiAttrs.IpPort())
iSCSIInterfaces = append(iSCSIInterfaces, iSCSIInterface)
}
if len(iSCSIInterfaces) == 0 {
returnError = fmt.Errorf("SVM %s has no active iSCSI interfaces", d.Config.SVM)
return
}
return
}
// Return the list of snapshots associated with the named volume
func (d *SANStorageDriver) SnapshotList(name string) ([]storage.Snapshot, error) {
if d.Config.DebugTraceFlags["method"] {
fields := log.Fields{
"Method": "SnapshotList",
"Type": "SANStorageDriver",
"name": name,
}
log.WithFields(fields).Debug(">>>> SnapshotList")
defer log.WithFields(fields).Debug("<<<< SnapshotList")
}
return GetSnapshotList(name, &d.Config, d.API)
}
// Test for the existence of a volume
func (d *SANStorageDriver) Get(name string) error {
if d.Config.DebugTraceFlags["method"] {
fields := log.Fields{"Method": "Get", "Type": "SANStorageDriver"}
log.WithFields(fields).Debug(">>>> Get")
defer log.WithFields(fields).Debug("<<<< Get")
}
return GetVolume(name, d.API, &d.Config)
}
// Retrieve storage backend capabilities
func (d *SANStorageDriver) GetStorageBackendSpecs(backend *storage.Backend) error {
if d.Config.BackendName == "" {
// Use the old naming scheme if no name is specified
backend.Name = "ontapsan_" + d.ips[0]
} else {
backend.Name = d.Config.BackendName
}
poolAttrs := d.getStoragePoolAttributes()
return getStorageBackendSpecsCommon(d, backend, poolAttrs)
}
func (d *SANStorageDriver) getStoragePoolAttributes() map[string]sa.Offer {
return map[string]sa.Offer{
sa.BackendType: sa.NewStringOffer(d.Name()),
sa.Snapshots: sa.NewBoolOffer(true),
sa.Clones: sa.NewBoolOffer(true),
sa.Encryption: sa.NewBoolOffer(d.API.SupportsFeature(api.NetAppVolumeEncryption)),
sa.ProvisioningType: sa.NewStringOffer("thick", "thin"),
}
}
func (d *SANStorageDriver) GetVolumeOpts(
volConfig *storage.VolumeConfig,
pool *storage.Pool,
requests map[string]sa.Request,
) (map[string]string, error) {
return getVolumeOptsCommon(volConfig, pool, requests), nil
}
func (d *SANStorageDriver) GetInternalVolumeName(name string) string {
return getInternalVolumeNameCommon(d.Config.CommonStorageDriverConfig, name)
}
func (d *SANStorageDriver) CreatePrepare(volConfig *storage.VolumeConfig) bool {
return createPrepareCommon(d, volConfig)
}
func (d *SANStorageDriver) CreateFollowup(volConfig *storage.VolumeConfig) error {
if d.Config.DebugTraceFlags["method"] {
fields := log.Fields{
"Method": "CreateFollowup",
"Type": "SANStorageDriver",
"name": volConfig.Name,
"internalName": volConfig.InternalName,
}
log.WithFields(fields).Debug(">>>> CreateFollowup")
defer log.WithFields(fields).Debug("<<<< CreateFollowup")
}
if d.Config.DriverContext == tridentconfig.ContextDocker {
log.Debug("No follow-up create actions for Docker.")
return nil
}
return d.mapOntapSANLun(volConfig)
}
func (d *SANStorageDriver) mapOntapSANLun(volConfig *storage.VolumeConfig) error {
var (
targetIQN string
lunID int
)
response, err := d.API.IscsiServiceGetIterRequest()
if response.Result.ResultStatusAttr != "passed" || err != nil {
return fmt.Errorf("problem retrieving iSCSI services: %v, %v",
err, response.Result.ResultErrnoAttr)
}
for _, serviceInfo := range response.Result.AttributesList() {
if serviceInfo.Vserver() == d.Config.SVM {
targetIQN = serviceInfo.NodeName()
log.WithFields(log.Fields{
"volume": volConfig.Name,
"targetIQN": targetIQN,
}).Debug("Discovered target IQN for volume.")
break
}
}
// Map LUN
lunPath := fmt.Sprintf("/vol/%v/lun0", volConfig.InternalName)
lunID, err = d.API.LunMapIfNotMapped(d.Config.IgroupName, lunPath)
if err != nil {
return err
}
volConfig.AccessInfo.IscsiTargetPortal = d.ips[0]
volConfig.AccessInfo.IscsiPortals = d.ips[1:]
volConfig.AccessInfo.IscsiTargetIQN = targetIQN
volConfig.AccessInfo.IscsiLunNumber = int32(lunID)
volConfig.AccessInfo.IscsiIgroup = d.Config.IgroupName
log.WithFields(log.Fields{
"volume": volConfig.Name,
"volume_internal": volConfig.InternalName,
"targetIQN": volConfig.AccessInfo.IscsiTargetIQN,
"lunNumber": volConfig.AccessInfo.IscsiLunNumber,
"igroup": volConfig.AccessInfo.IscsiIgroup,
}).Debug("Mapped ONTAP LUN.")
return nil
}
func (d *SANStorageDriver) GetProtocol() tridentconfig.Protocol {
return tridentconfig.Block
}
func (d *SANStorageDriver) StoreConfig(
b *storage.PersistentStorageBackendConfig,
) {
drivers.SanitizeCommonStorageDriverConfig(d.Config.CommonStorageDriverConfig)
b.OntapConfig = &d.Config
}
func (d *SANStorageDriver) GetExternalConfig() interface{} {
return getExternalConfig(d.Config)
}
// GetVolumeExternal queries the storage backend for all relevant info about
// a single container volume managed by this driver and returns a VolumeExternal
// representation of the volume.
func (d *SANStorageDriver) GetVolumeExternal(name string) (*storage.VolumeExternal, error) {
volumeAttrs, err := d.API.VolumeGet(name)
if err != nil {
return nil, err
}
lunPath := fmt.Sprintf("/vol/%v/lun0", name)
lunAttrs, err := d.API.LunGet(lunPath)
if err != nil {
return nil, err
}
return d.getVolumeExternal(&lunAttrs, &volumeAttrs), nil
}
// GetVolumeExternalWrappers queries the storage backend for all relevant info about
// container volumes managed by this driver. It then writes a VolumeExternal
// representation of each volume to the supplied channel, closing the channel
// when finished.
func (d *SANStorageDriver) GetVolumeExternalWrappers(
channel chan *storage.VolumeExternalWrapper) {
// Let the caller know we're done by closing the channel
defer close(channel)
// Get all volumes matching the storage prefix
volumesResponse, err := d.API.VolumeGetAll(*d.Config.StoragePrefix)
if err = api.GetError(volumesResponse, err); err != nil {
channel <- &storage.VolumeExternalWrapper{nil, err}
return
}
// Get all LUNs named 'lun0' in volumes matching the storage prefix
lunPathPattern := fmt.Sprintf("/vol/%v/lun0", *d.Config.StoragePrefix+"*")
lunsResponse, err := d.API.LunGetAll(lunPathPattern)
if err = api.GetError(lunsResponse, err); err != nil {
channel <- &storage.VolumeExternalWrapper{nil, err}
return
}
// Make a map of volumes for faster correlation with LUNs
volumeMap := make(map[string]azgo.VolumeAttributesType)
for _, volumeAttrs := range volumesResponse.Result.AttributesList() {
internalName := string(volumeAttrs.VolumeIdAttributesPtr.Name())
volumeMap[internalName] = volumeAttrs
}
// Convert all LUNs to VolumeExternal and write them to the channel
for _, lun := range lunsResponse.Result.AttributesList() {
volume, ok := volumeMap[lun.Volume()]
if !ok {
log.WithField("path", lun.Path()).Warning("Flexvol not found for LUN.")
continue
}
channel <- &storage.VolumeExternalWrapper{d.getVolumeExternal(&lun, &volume), nil}
}
}
// getExternalVolume is a private method that accepts info about a volume
// as returned by the storage backend and formats it as a VolumeExternal
// object.
func (d *SANStorageDriver) getVolumeExternal(
lunAttrs *azgo.LunInfoType, volumeAttrs *azgo.VolumeAttributesType,
) *storage.VolumeExternal {
volumeIDAttrs := volumeAttrs.VolumeIdAttributesPtr
volumeSnapshotAttrs := volumeAttrs.VolumeSnapshotAttributesPtr
internalName := string(volumeIDAttrs.Name())
name := internalName[len(*d.Config.StoragePrefix):]
volumeConfig := &storage.VolumeConfig{
Version: tridentconfig.OrchestratorAPIVersion,
Name: name,
InternalName: internalName,
Size: strconv.FormatInt(int64(lunAttrs.Size()), 10),
Protocol: tridentconfig.Block,
SnapshotPolicy: volumeSnapshotAttrs.SnapshotPolicy(),
ExportPolicy: "",
SnapshotDir: "false",
UnixPermissions: "",
StorageClass: "",
AccessMode: tridentconfig.ReadWriteOnce,
AccessInfo: utils.VolumeAccessInfo{},
BlockSize: "",
FileSystem: "",
}
return &storage.VolumeExternal{
Config: volumeConfig,
Pool: volumeIDAttrs.ContainingAggregateName(),
}
}
// GetUpdateType returns a bitmap populated with updates to the driver
func (d *SANStorageDriver) GetUpdateType(driverOrig storage.Driver) *roaring.Bitmap {
bitmap := roaring.New()
dOrig, ok := driverOrig.(*SANStorageDriver)
if !ok {
bitmap.Add(storage.InvalidUpdate)
return bitmap
}
if d.Config.DataLIF != dOrig.Config.DataLIF {
bitmap.Add(storage.VolumeAccessInfoChange)
}
return bitmap
}
// Resize expands the volume size.
func (d *SANStorageDriver) Resize(name string, sizeBytes uint64) error {
if d.Config.DebugTraceFlags["method"] {
fields := log.Fields{
"Method": "Resize",
"Type": "SANStorageDriver",
"name": name,
"sizeBytes": sizeBytes,
}
log.WithFields(fields).Debug(">>>> Resize")
defer log.WithFields(fields).Debug("<<<< Resize")
}
// Validation checks
volExists, err := d.API.VolumeExists(name)
if err != nil {
log.WithFields(log.Fields{
"error": err,
"name": name,
}).Error("Error checking for existing volume.")
return fmt.Errorf("error occurred checking for existing volume")
}
if !volExists {
return fmt.Errorf("volume %s does not exist", name)
}
volSize, err := d.API.VolumeSize(name)
if err != nil {
log.WithFields(log.Fields{
"error": err,
"name": name,
}).Error("Error checking volume size.")
return fmt.Errorf("error occurred when checking volume size")
}
sameSize, err := utils.VolumeSizeWithinTolerance(int64(sizeBytes), int64(volSize), tridentconfig.SANResizeDelta)
if err != nil {
return err
}
if sameSize {
log.WithFields(log.Fields{
"requestedSize": sizeBytes,
"currentVolumeSize": volSize,
"name": name,
"delta": tridentconfig.SANResizeDelta,
}).Info("Requested size and current volume size are within the delta and therefore considered the same size for SAN resize operations.")
return nil
}
volSizeBytes := uint64(volSize)
if sizeBytes < volSizeBytes {
return fmt.Errorf("requested size %d is less than existing volume size %d", sizeBytes, volSizeBytes)
}
if aggrLimitsErr := checkAggregateLimitsForFlexvol(name, sizeBytes, d.Config, d.GetAPI()); aggrLimitsErr != nil {
return aggrLimitsErr
}
if _, _, checkVolumeSizeLimitsError := drivers.CheckVolumeSizeLimits(sizeBytes, d.Config.CommonStorageDriverConfig); checkVolumeSizeLimitsError != nil {
return checkVolumeSizeLimitsError
}
// Resize operations
lunPath := fmt.Sprintf("/vol/%v/lun0", name)
if !d.API.SupportsFeature(api.LunGeometrySkip) {
// Check LUN geometry and verify LUN max size.
lunGeometry, err := d.API.LunGetGeometry(lunPath)
if err != nil {
log.WithField("error", err).Error("LUN resize failed.")
return fmt.Errorf("volume resize failed")
}
lunMaxSize := lunGeometry.Result.MaxResizeSize()
if lunMaxSize < int(sizeBytes) {
log.WithFields(log.Fields{
"error": err,
"sizeBytes": sizeBytes,
"lunMaxSize": lunMaxSize,
"lunPath": lunPath,
}).Error("Requested size is larger than LUN's maximum capacity.")
return fmt.Errorf("volume resize failed as requested size is larger than LUN's maximum capacity")
}
}
// Resize FlexVol
response, err := d.API.VolumeSetSize(name, strconv.FormatUint(sizeBytes, 10))
if err = api.GetError(response.Result, err); err != nil {
log.WithField("error", err).Error("Volume resize failed.")
return fmt.Errorf("volume resize failed")
}
// Resize LUN0
_, err = d.API.LunResize(lunPath, int(sizeBytes))
if err != nil {
log.WithField("error", err).Error("LUN resize failed.")
return fmt.Errorf("volume resize failed")
}
return nil
}