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node.go
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node.go
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package service
import (
"context"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path"
"regexp"
"strconv"
"strings"
"sync"
"time"
"github.com/container-storage-interface/spec/lib/go/csi"
"github.com/dell/csi-unity/service/utils"
"github.com/dell/gobrick"
"github.com/dell/gofsutil"
"github.com/dell/goiscsi"
"github.com/dell/gounity"
gounityapi "github.com/dell/gounity/api"
"github.com/dell/gounity/types"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
var (
targetMountRecheckSleepTime = 3 * time.Second
disconnectVolumeRetryTime = 1 * time.Second
nodeStartTimeout = 3 * time.Second
lunzMutex sync.Mutex
LUNZHLU = 0
nodeMutex sync.Mutex
sysBlock = "/sys/block"
syncNodeInfoChan chan bool
connectedSystemID = make([]string, 0)
VolumeNameLengthConstraint = 63
)
const (
componentOkMessage = "ALRT_COMPONENT_OK"
maxUnityVolumesPerNodeLabel = "max-unity-volumes-per-node"
ubuntuNodeRoot = "/noderoot"
devtmpfs = "devtmpfs"
)
func (s *service) NodeStageVolume(
ctx context.Context,
req *csi.NodeStageVolumeRequest) (
*csi.NodeStageVolumeResponse, error) {
ctx, log, rid := GetRunidLog(ctx)
log.Debugf("Executing NodeStageVolume with args: %+v", *req)
volId, protocol, arrayId, unity, err := s.validateAndGetResourceDetails(ctx, req.GetVolumeId(), volumeType)
if err != nil {
return nil, err
}
ctx, log = setArrayIdContext(ctx, arrayId)
// Probe the node if required and make sure startup called
if err := s.nodeProbe(ctx, arrayId); err != nil {
return nil, err
}
stagingPath := req.GetStagingTargetPath()
if stagingPath == "" {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "staging target path required"))
}
vc := req.GetVolumeCapability()
if vc == nil {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "volume capability is required"))
}
am := vc.GetAccessMode()
if am == nil {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "access mode is required"))
}
isBlock := accTypeBlock(vc)
protocol, err = ValidateAndGetProtocol(ctx, protocol, req.GetVolumeContext()[keyProtocol])
if err != nil {
return nil, err
}
log.Debugf("Protocol is: %s", protocol)
if protocol == NFS {
//Perform stage mount for NFS
nfsShare, nfsv3, nfsv4, err := s.getNFSShare(ctx, volId, arrayId)
if err != nil {
return nil, err
}
err = s.checkFilesystemMapping(ctx, nfsShare, am, arrayId)
if err != nil {
return nil, err
}
exportPaths := nfsShare.NFSShareContent.ExportPaths
if len(exportPaths) == 0 {
return nil, status.Error(codes.NotFound, utils.GetMessageWithRunID(rid, "Export paths not exist on NFS Share: %s", nfsShare.NFSShareContent.Id))
}
err = stagePublishNFS(ctx, req, exportPaths, arrayId, nfsv3, nfsv4)
if err != nil {
return nil, err
}
log.Debugf("Node Stage completed successfully: filesystem: %s is mounted on staging target path: %s", volId, stagingPath)
return &csi.NodeStageVolumeResponse{}, nil
} else {
//Protocol if FC or iSCSI
volumeApi := gounity.NewVolume(unity)
volume, err := volumeApi.FindVolumeById(ctx, volId)
if err != nil {
// If the volume isn't found, we cannot stage it
return nil, status.Error(codes.NotFound, utils.GetMessageWithRunID(rid, "Volume not found. [%v]", err))
}
//Check if the volume is given access to the node
hlu, err := s.checkVolumeMapping(ctx, volume, arrayId)
if err != nil {
return nil, err
}
volumeWwn := utils.GetWwnFromVolumeContentWwn(volume.VolumeContent.Wwn)
publishContextData := publishContextData{
deviceWWN: "0x" + volumeWwn,
volumeLUNAddress: hlu,
}
if hlu == LUNZHLU {
if err := checkAndRemoveLunz(ctx); err != nil {
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "Error during removal of Lunz device: [%v]", err))
}
}
useFC := false
if protocol == ISCSI {
ipInterfaceAPI := gounity.NewIpInterface(unity)
ipInterfaces, err := ipInterfaceAPI.ListIscsiIPInterfaces(ctx)
if err != nil {
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "Error retrieving iScsi Interface IPs from the array: [%v]", err))
}
interfaceIps := utils.GetIPsFromInferfaces(ctx, ipInterfaces)
publishContextData.iscsiTargets = s.iScsiDiscoverFetchTargets(ctx, interfaceIps)
log.Debugf("Found iscsi Targets: %s", publishContextData.iscsiTargets)
if s.iscsiConnector == nil {
s.initISCSIConnector(s.opts.Chroot)
}
} else if protocol == FC {
useFC = true
var targetWwns []string
hostAPI := gounity.NewHost(unity)
host, err := s.getHostId(ctx, arrayId, s.opts.NodeName, s.opts.LongNodeName)
if err != nil {
return nil, err
}
for _, initiator := range host.HostContent.FcInitiators {
hostInitiator, err := hostAPI.FindHostInitiatorById(ctx, initiator.Id)
if err != nil {
return nil, status.Error(codes.NotFound, utils.GetMessageWithRunID(rid, "Find Host Initiator Failed [%v]", err))
}
for _, initiatorPath := range hostInitiator.HostInitiatorContent.Paths {
hostInitiatorPath, err := hostAPI.FindHostInitiatorPathById(ctx, initiatorPath.Id)
if err != nil {
return nil, status.Error(codes.NotFound, utils.GetMessageWithRunID(rid, "Find Host Initiator Path Failed [%v]", err))
}
fcPort, err := hostAPI.FindFcPortById(ctx, hostInitiatorPath.HostInitiatorPathContent.FcPortID.Id)
if err != nil {
return nil, status.Error(codes.NotFound, utils.GetMessageWithRunID(rid, "Find Fc port Failed [%v]", err))
}
wwn := utils.GetFcPortWwnFromVolumeContentWwn(fcPort.FcPortContent.Wwn)
if !utils.ArrayContains(targetWwns, wwn) {
log.Debug("Found Target wwn: ", wwn)
targetWwns = append(targetWwns, wwn)
}
}
}
publishContextData.fcTargets = targetWwns
log.Debugf("Found FC Targets: %s", publishContextData.iscsiTargets)
if s.fcConnector == nil {
s.initFCConnector(s.opts.Chroot)
}
}
log.Debug("Connect context data: ", publishContextData)
devicePath, err := s.connectDevice(ctx, publishContextData, useFC)
if err != nil {
return nil, err
}
//Skip staging for Block devices
if !isBlock {
err = stageVolume(ctx, req, stagingPath, devicePath)
if err != nil {
return nil, err
}
}
log.Debugf("Node Stage completed successfully - Device path is %s", devicePath)
return &csi.NodeStageVolumeResponse{}, nil
}
}
func (s *service) NodeUnstageVolume(
ctx context.Context,
req *csi.NodeUnstageVolumeRequest) (
*csi.NodeUnstageVolumeResponse, error) {
ctx, log, rid := GetRunidLog(ctx)
log.Debugf("Executing NodeUnstageVolume with args: %+v", *req)
// Get the VolumeID and parse it
volId, protocol, arrayId, unity, err := s.validateAndGetResourceDetails(ctx, req.GetVolumeId(), volumeType)
if err != nil {
return nil, err
}
ctx, log = setArrayIdContext(ctx, arrayId)
// Probe the node if required and make sure startup called
if err := s.nodeProbe(ctx, arrayId); err != nil {
return nil, err
}
stageTgt := req.GetStagingTargetPath()
if stageTgt == "" {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "A Staging Target argument is required"))
}
if protocol == NFS {
nfsShare, _, _, err := s.getNFSShare(ctx, volId, arrayId)
if err != nil {
// If the filesysten isn't found, k8s will retry NodeUnstage forever so...
// There is no way back if filesystem isn't found and so considering this scenario idempotent
if err == gounity.FilesystemNotFoundError {
log.Debugf("Filesystem %s not found on the array %s during Node Unstage. Hence considering the call to be idempotent", volId, arrayId)
return &csi.NodeUnstageVolumeResponse{}, nil
}
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "%v", err))
}
exportPaths := nfsShare.NFSShareContent.ExportPaths
if len(exportPaths) == 0 {
return nil, status.Error(codes.NotFound, utils.GetMessageWithRunID(rid, "Export paths not exist on NFS Share: %s", nfsShare.NFSShareContent.Id))
}
err = unpublishNFS(ctx, stageTgt, arrayId, exportPaths)
if err != nil {
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "%v", err))
}
log.Debugf("Node Unstage completed successfully. No mounts on staging target path: %s", req.GetStagingTargetPath())
return &csi.NodeUnstageVolumeResponse{}, nil
} else if protocol == ProtocolUnknown {
//Volume is mounted via CSI-Unity v1.0 or v1.1 and hence different staging target path was used
stageTgt = path.Join(s.opts.PvtMountDir, volId)
host, err := s.getHostId(ctx, arrayId, s.opts.NodeName, s.opts.LongNodeName)
if err != nil {
return nil, err
}
if len(host.HostContent.FcInitiators) == 0 {
//FC gets precedence if host has both initiators - which is not supported by the driver
protocol = FC
} else if len(host.HostContent.IscsiInitiators) == 0 {
protocol = ISCSI
}
} else if protocol != FC && protocol != ISCSI {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "Invalid Protocol Value %s after parsing volume context ID %s", protocol, req.GetVolumeId()))
}
volumeApi := gounity.NewVolume(unity)
volume, err := volumeApi.FindVolumeById(ctx, volId)
if err != nil {
// If the volume isn't found, k8s will retry NodeUnstage forever so...
// There is no way back if volume isn't found and so considering this scenario idempotent
if err == gounity.VolumeNotFoundError {
log.Debugf("Volume %s not found on the array %s during Node Unstage. Hence considering the call to be idempotent", volId, arrayId)
return &csi.NodeUnstageVolumeResponse{}, nil
}
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "%v", err))
}
volumeWwn := utils.GetWwnFromVolumeContentWwn(volume.VolumeContent.Wwn)
lastMounted, devicePath, err := unstageVolume(ctx, req, volumeWwn, s.opts.Chroot)
if err != nil {
return nil, err
}
if !lastMounted {
// It is unusual that we have not removed the last mount (i.e. lastUnmounted == false)
// Recheck to make sure the target is unmounted.
log.Debug("Not the last mount - rechecking target mount is gone")
targetMount, err := getTargetMount(ctx, stageTgt)
if err != nil {
return nil, err
}
if targetMount.Device != "" {
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "Target Mount still present"))
}
if devicePath == "" {
devicePath = targetMount.Source
}
// Get the device mounts
dev, err := GetDevice(ctx, devicePath)
if err != nil {
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, err.Error()))
}
log.Debug("Rechecking dev mounts")
mnts, err := getDevMounts(ctx, dev)
if err != nil {
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, err.Error()))
}
if len(mnts) > 0 {
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "Device mounts still present after unmounting target and staging mounts %#v", mnts))
}
}
err = s.disconnectVolume(ctx, volumeWwn, protocol)
if err != nil {
return nil, err
}
// Remove the mount private directory if present, and the directory
err = removeWithRetry(ctx, stageTgt)
if err != nil {
log.Infof("Error removing stageTgt: %v", err)
}
return &csi.NodeUnstageVolumeResponse{}, nil
}
func (s *service) NodePublishVolume(
ctx context.Context,
req *csi.NodePublishVolumeRequest) (
*csi.NodePublishVolumeResponse, error) {
ctx, log, rid := GetRunidLog(ctx)
log.Debugf("Executing NodePublishVolume with args: %+v", *req)
var ephemeralVolume bool
ephemeral, ok := req.VolumeContext["csi.storage.k8s.io/ephemeral"]
if ok {
ephemeralVolume = strings.ToLower(ephemeral) == "true"
}
if ephemeralVolume {
return s.ephemeralNodePublishVolume(ctx, req)
}
volID, protocol, arrayId, unity, err := s.validateAndGetResourceDetails(ctx, req.GetVolumeId(), volumeType)
if err != nil {
return nil, err
}
ctx, log = setArrayIdContext(ctx, arrayId)
// Probe the node if required and make sure startup called
if err := s.requireProbe(ctx, arrayId); err != nil {
log.Debug("Probe has not been invoked. Hence invoking Probe before Node publish volume")
err = s.nodeProbe(ctx, arrayId)
if err != nil {
return nil, err
}
}
targetPath := req.GetTargetPath()
if targetPath == "" {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "target path required"))
}
stagingTargetPath := req.GetStagingTargetPath()
if stagingTargetPath == "" {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "staging target path required"))
}
volCap := req.GetVolumeCapability()
if volCap == nil {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "volume capability required"))
}
accMode := volCap.GetAccessMode()
if accMode == nil {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "volume access mode required"))
}
if protocol == NFS {
//Perform target mount for NFS
nfsShare, nfsv3, nfsv4, err := s.getNFSShare(ctx, volID, arrayId)
if err != nil {
return nil, err
}
exportPaths := nfsShare.NFSShareContent.ExportPaths
if len(exportPaths) == 0 {
return nil, status.Error(codes.NotFound, utils.GetMessageWithRunID(rid, "Export paths not exist on NFS Share: %s", nfsShare.NFSShareContent.Id))
}
err = publishNFS(ctx, req, exportPaths, arrayId, s.opts.Chroot, nfsv3, nfsv4, s.opts.AllowRWOMultiPodAccess)
if err != nil {
return nil, err
}
log.Debugf("Node Publish completed successfully: filesystem: %s is mounted on target path: %s", volID, targetPath)
return &csi.NodePublishVolumeResponse{}, nil
}
//Protocol FC or iSCSI
isBlock := accTypeBlock(volCap)
if isBlock && req.GetReadonly() == true {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "readonly not supported for Block"))
}
volumeApi := gounity.NewVolume(unity)
volume, err := volumeApi.FindVolumeById(ctx, volID)
if err != nil {
return nil, status.Error(codes.NotFound, utils.GetMessageWithRunID(rid, "volume with ID '%s' not found", volID))
}
deviceWWN := utils.GetWwnFromVolumeContentWwn(volume.VolumeContent.Wwn)
symlinkPath, _, err := gofsutil.WWNToDevicePathX(ctx, deviceWWN)
if err != nil {
return nil, status.Error(codes.NotFound, utils.GetMessageWithRunID(rid, "Disk path not found. Error: %v", err))
}
if err := publishVolume(ctx, req, targetPath, symlinkPath, s.opts.Chroot, s.opts.AllowRWOMultiPodAccess); err != nil {
return nil, err
}
return &csi.NodePublishVolumeResponse{}, nil
}
func (s *service) ephemeralNodePublishVolume(
ctx context.Context,
req *csi.NodePublishVolumeRequest) (
*csi.NodePublishVolumeResponse, error) {
ctx, log, rid := GetRunidLog(ctx)
//Create Ephemeral Volume
volName := req.VolumeId
if len(volName) > VolumeNameLengthConstraint {
volName = volName[0 : VolumeNameLengthConstraint-1]
}
size, err := utils.ParseSize(req.VolumeContext["size"])
if err != nil {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "Unable to parse size. Error: %v", err))
}
createVolResp, err := s.CreateVolume(ctx, &csi.CreateVolumeRequest{
Name: volName,
CapacityRange: &csi.CapacityRange{
RequiredBytes: size,
},
VolumeCapabilities: []*csi.VolumeCapability{req.VolumeCapability},
Parameters: req.VolumeContext,
Secrets: req.Secrets,
})
if err != nil {
return nil, status.Error(codes.FailedPrecondition, utils.GetMessageWithRunID(rid, "Create Ephemeral Volume %s Failed with error: %v", volName, err))
}
log.Debugf("Ephemeral Volume %s created successfully", volName)
//Create NodeUnpublishRequest for rollback scenario
nodeUnpublishRequest := &csi.NodeUnpublishVolumeRequest{
VolumeId: createVolResp.Volume.VolumeId,
TargetPath: req.TargetPath,
}
//ControllerPublishVolume to current node
controllerPublishResp, err := s.ControllerPublishVolume(ctx, &csi.ControllerPublishVolumeRequest{
VolumeId: createVolResp.Volume.VolumeId,
NodeId: s.opts.NodeName + "," + s.opts.LongNodeName,
VolumeCapability: req.VolumeCapability,
Readonly: req.Readonly,
Secrets: req.Secrets,
VolumeContext: createVolResp.Volume.VolumeContext,
})
if err != nil {
//Call Ephemeral Node Unpublish for recovery
_, _ = s.ephemeralNodeUnpublish(ctx, nodeUnpublishRequest, req.VolumeId)
return nil, status.Error(codes.FailedPrecondition, utils.GetMessageWithRunID(rid, "Ephemeral Controller Publish Volume failed with error: %v", err))
}
log.Debug("Ephemeral Controller Publish successful")
stagingMountPath := path.Join(s.opts.EnvEphemeralStagingTargetPath, req.VolumeId)
//Node Stage for Ephemeral Volume
_, err = s.NodeStageVolume(ctx, &csi.NodeStageVolumeRequest{
VolumeId: createVolResp.Volume.VolumeId,
PublishContext: controllerPublishResp.PublishContext,
StagingTargetPath: path.Join(stagingMountPath, "globalmount"),
VolumeCapability: req.VolumeCapability,
Secrets: req.Secrets,
VolumeContext: createVolResp.Volume.VolumeContext,
})
if err != nil {
//Call Ephemeral Node Unpublish for recovery
_, _ = s.ephemeralNodeUnpublish(ctx, nodeUnpublishRequest, req.VolumeId)
return nil, status.Error(codes.FailedPrecondition, utils.GetMessageWithRunID(rid, "Ephemeral Node Stage Volume failed with error: %v", err))
}
log.Debug("Ephemeral Node Stage Successful")
//Node Publish for Ephemeral Volume
_, err = s.NodePublishVolume(ctx, &csi.NodePublishVolumeRequest{
VolumeId: createVolResp.Volume.VolumeId,
PublishContext: controllerPublishResp.PublishContext,
StagingTargetPath: path.Join(stagingMountPath, "globalmount"),
TargetPath: req.TargetPath,
VolumeCapability: req.VolumeCapability,
Readonly: req.Readonly,
Secrets: req.Secrets,
VolumeContext: createVolResp.Volume.VolumeContext,
})
if err != nil {
//Call Ephemeral Node Unpublish for recovery
_, _ = s.ephemeralNodeUnpublish(ctx, nodeUnpublishRequest, req.VolumeId)
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "Ephemeral Node Publish Volume failed with error: %v", err))
}
log.Debug("Ephemeral Node Publish Successful")
f, err := os.Create(path.Join(stagingMountPath, "id"))
if err != nil {
//Call Ephemeral Node Unpublish for recovery
_, _ = s.ephemeralNodeUnpublish(ctx, nodeUnpublishRequest, req.VolumeId)
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "Creation of file failed with error: %v", err))
}
defer f.Close()
_, err2 := f.WriteString(createVolResp.Volume.VolumeId)
if err2 != nil {
//Call Ephemeral Node Unpublish for recovery
_, _ = s.ephemeralNodeUnpublish(ctx, nodeUnpublishRequest, req.VolumeId)
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "Save Volume Id in file failed with error: %v", err))
}
return &csi.NodePublishVolumeResponse{}, nil
}
// checkAndRemoveLunz checks for LUNZ devices by scanning the entries in /proc/scsi/scsi,
// identifying the model, vendor, host, channel and id of each entry, and then if an model entry is found named LUNZ with vendor
// DGC, then call a SCSI "remove-single-device" command is sent to the associated device.
func checkAndRemoveLunz(ctx context.Context) error {
lunzMutex.Lock()
defer lunzMutex.Unlock()
ctx, log, rid := GetRunidLog(ctx)
arg0 := "cat"
arg1 := "/proc/scsi/scsi"
log.Debugf("Obtained current ctx %v and rid %s", ctx, rid)
cmd := exec.Command(arg0, arg1)
stdout, err := cmd.Output()
if err != nil {
return status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "Error during command execution: %v", err))
}
var modelString = regexp.MustCompile(`Model:\s+(\w*.*?)\s*Rev:`)
modelResult := modelString.FindAllStringSubmatch(string(stdout), -1)
var vendorString = regexp.MustCompile(`Vendor:\s+(\w*.*?)\s*Model:`)
vendorResult := vendorString.FindAllStringSubmatch(string(stdout), -1)
var hostString = regexp.MustCompile(`Host:\s+scsi(\w*.*?)\s*Channel:`)
hostResult := hostString.FindAllStringSubmatch(string(stdout), -1)
var idString = regexp.MustCompile(`Id:\s+(\w*.*?)\s*Lun:`)
idResult := idString.FindAllStringSubmatch(string(stdout), -1)
var channelString = regexp.MustCompile(`Channel:\s+(\w*.*?)\s*Id:`)
channelResult := channelString.FindAllStringSubmatch(string(stdout), -1)
resultID := []string{}
for i := 0; i < len(idResult); i++ {
resultID = append(resultID, idResult[i][1])
}
resultChannel := []string{}
for i := 0; i < len(channelResult); i++ {
resultChannel = append(resultChannel, channelResult[i][1])
}
resultModel := []string{}
for i := 0; i < len(modelResult); i++ {
resultModel = append(resultModel, modelResult[i][1])
}
resultVendor := []string{}
for i := 0; i < len(vendorResult); i++ {
resultVendor = append(resultVendor, vendorResult[i][1])
}
resultHost := []string{}
for i := 0; i < len(hostResult); i++ {
resultHost = append(resultHost, hostResult[i][1])
}
for index, element := range resultModel {
if element == "LUNZ" && resultVendor[index] == "DGC" {
// We invoke the scsi remove-single-device command
// only when the Vendor is DGC and LUN model is LUNZ
filePath := "/proc/scsi/scsi"
file, err := os.OpenFile(filePath, os.O_WRONLY, os.ModeDevice)
if err != nil {
log.Warnf("Error opening file %v", err)
continue
}
if file != nil {
command := fmt.Sprintf("scsi remove-single-device %s %s %s %d", resultHost[index],
resultChannel[index], resultID[index], 0)
log.Debugf("Attempting to remove LUNZ with command %s", command)
_, err = file.WriteString(command)
if err != nil {
log.Warnf("error while writing...%v", err)
file.Close()
continue
}
file.Close()
}
log.Debugf("LUNZ removal successful..")
}
}
return nil
}
// Node Unpublish Volume - Unmounts the volume from the target path and from private directory
// Required - Volume ID and Target path
func (s *service) NodeUnpublishVolume(
ctx context.Context,
req *csi.NodeUnpublishVolumeRequest) (
*csi.NodeUnpublishVolumeResponse, error) {
ctx, log, rid := GetRunidLog(ctx)
log.Debugf("Executing NodeUnpublishVolume with args: %+v", *req)
var isEphemeralVolume bool
volName := req.VolumeId
file := s.opts.EnvEphemeralStagingTargetPath + req.VolumeId + "/id"
if _, err := os.Stat(file); err == nil {
isEphemeralVolume = true
dat, err := ioutil.ReadFile(file)
if err != nil {
return nil, errors.New("Unable to get volume id for ephemeral volume")
}
req.VolumeId = string(dat)
}
if isEphemeralVolume {
return s.ephemeralNodeUnpublish(ctx, req, volName)
}
volId, protocol, arrayId, unity, err := s.validateAndGetResourceDetails(ctx, req.GetVolumeId(), volumeType)
if err != nil {
return nil, err
}
ctx, log = setArrayIdContext(ctx, arrayId)
// Probe node if required
if err := s.nodeProbe(ctx, arrayId); err != nil {
return nil, err
}
// Get the target path
target := req.GetTargetPath()
if target == "" {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "target path required"))
}
if protocol == NFS {
nfsShare, _, _, err := s.getNFSShare(ctx, volId, arrayId)
if err != nil {
// If the filesysten isn't found, k8s will retry NodeUnpublish forever so...
// There is no way back if filesystem isn't found and so considering this scenario idempotent
if err == gounity.FilesystemNotFoundError {
log.Debugf("Filesystem %s not found on the array %s during Node Unpublish. Hence considering the call to be idempotent", volId, arrayId)
return &csi.NodeUnpublishVolumeResponse{}, nil
}
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "%v", err))
}
exportPaths := nfsShare.NFSShareContent.ExportPaths
if len(exportPaths) == 0 {
return nil, status.Error(codes.NotFound, utils.GetMessageWithRunID(rid, "Export paths not exist on NFS Share: %s", nfsShare.NFSShareContent.Id))
}
err = unpublishNFS(ctx, target, arrayId, exportPaths)
if err != nil {
return nil, err
}
log.Debugf("Node Unpublish completed successfully. No mounts on target path: %s", req.GetTargetPath())
return &csi.NodeUnpublishVolumeResponse{}, nil
}
volumeApi := gounity.NewVolume(unity)
_, err = volumeApi.FindVolumeById(ctx, volId)
if err != nil {
// If the volume isn't found, k8s will retry NodeUnpublish forever so...
// There is no way back if volume isn't found and so considering this scenario idempotent
if err == gounity.VolumeNotFoundError {
log.Debugf("Volume %s not found on the array %s during Node Unpublish. Hence considering the call to be idempotent", volId, arrayId)
return &csi.NodeUnpublishVolumeResponse{}, nil
}
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "%v", err))
}
log.Debug("NodeUnpublishVolume Target Path:", target)
err = unpublishVolume(ctx, req)
if err != nil {
return nil, err
}
removeWithRetry(ctx, target)
return &csi.NodeUnpublishVolumeResponse{}, nil
}
func (s *service) ephemeralNodeUnpublish(
ctx context.Context,
req *csi.NodeUnpublishVolumeRequest, volName string) (
*csi.NodeUnpublishVolumeResponse, error) {
ctx, _, rid := GetRunidLog(ctx)
//Node Unpublish for Ephemeral Volume
_, err := s.NodeUnpublishVolume(ctx, &csi.NodeUnpublishVolumeRequest{
VolumeId: req.VolumeId,
TargetPath: req.TargetPath,
})
if err != nil {
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "Node Unpublish for ephemeral volume failed with error: %v", err))
}
//Node Unstage for Ephemeral Volume
_, err = s.NodeUnstageVolume(ctx, &csi.NodeUnstageVolumeRequest{
VolumeId: req.VolumeId,
StagingTargetPath: path.Join(s.opts.EnvEphemeralStagingTargetPath, volName, "globalmount"),
})
if err != nil {
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "Node Unstage for ephemeral volume failed with error: %v", err))
}
//Controller Unpublish for Ephemeral Volume
_, err = s.ControllerUnpublishVolume(ctx, &csi.ControllerUnpublishVolumeRequest{
VolumeId: req.VolumeId,
NodeId: s.opts.NodeName + "," + s.opts.LongNodeName,
})
if err != nil {
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "Controller Unpublish for ephemeral volume failed with error: %v", err))
}
//Delete Volume for Ephemeral Volume
_, err = s.DeleteVolume(ctx, &csi.DeleteVolumeRequest{
VolumeId: req.VolumeId,
})
if err != nil {
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "Delete Volume for ephemeral volume failed with error: %v", err))
}
err = os.RemoveAll(s.opts.EnvEphemeralStagingTargetPath + volName + "/id")
if err != nil {
return nil, status.Error(codes.Internal, utils.GetMessageWithRunID(rid, "Unable to clean id file"))
}
return &csi.NodeUnpublishVolumeResponse{}, nil
}
func (s *service) NodeGetInfo(
ctx context.Context,
req *csi.NodeGetInfoRequest) (
*csi.NodeGetInfoResponse, error) {
ctx, log, rid := GetRunidLog(ctx)
log.Debugf("Executing NodeGetInfo with args: %+v", *req)
atleastOneArraySuccess := false
//Sleep for a while and wait untill iscsi discovery is completed
time.Sleep(nodeStartTimeout)
arraysList := s.getStorageArrayList()
for _, array := range arraysList {
if array.IsHostAdded {
atleastOneArraySuccess = true
}
}
if atleastOneArraySuccess {
s.validateProtocols(ctx, arraysList)
topology := getTopology()
// If topology keys are empty then this node is not capable of either iSCSI/FC but can still provision NFS volumes by default
log.Debugf("Topology Keys--->%+v", topology)
// Check for node label 'max-unity-volumes-per-node'. If present set 'MaxVolumesPerNode' to this value.
// If node label is not present, set 'MaxVolumesPerNode' to default value i.e., 0
var maxUnityVolumesPerNode int64
labels, err := s.GetNodeLabels(ctx)
if err != nil {
return nil, err
}
if val, ok := labels[maxUnityVolumesPerNodeLabel]; ok {
maxUnityVolumesPerNode, err = strconv.ParseInt(val, 10, 64)
if err != nil {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "invalid value '%s' specified for 'max-unity-volumes-per-node' node label", val))
}
} else {
// As per the csi spec the plugin MUST NOT set negative values to
// 'MaxVolumesPerNode' in the NodeGetInfoResponse response
if s.opts.MaxVolumesPerNode < 0 {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "maxUnityVolumesPerNode MUST NOT be set to negative value"))
}
maxUnityVolumesPerNode = s.opts.MaxVolumesPerNode
}
log.Info("NodeGetInfo success")
return &csi.NodeGetInfoResponse{
NodeId: s.opts.NodeName + "," + s.opts.LongNodeName,
AccessibleTopology: &csi.Topology{
Segments: topology,
},
MaxVolumesPerNode: maxUnityVolumesPerNode,
}, nil
}
return nil, status.Error(codes.Unavailable, utils.GetMessageWithRunID(rid, "The node [%s] is not added to any of the arrays", s.opts.NodeName))
}
func (s *service) NodeGetCapabilities(
ctx context.Context,
req *csi.NodeGetCapabilitiesRequest) (
*csi.NodeGetCapabilitiesResponse, error) {
ctx, log, _ := GetRunidLog(ctx)
log.Infof("Executing NodeGetCapabilities with args: %+v", *req)
return &csi.NodeGetCapabilitiesResponse{
Capabilities: []*csi.NodeServiceCapability{
{
Type: &csi.NodeServiceCapability_Rpc{
Rpc: &csi.NodeServiceCapability_RPC{
Type: csi.NodeServiceCapability_RPC_UNKNOWN,
},
},
},
{
Type: &csi.NodeServiceCapability_Rpc{
Rpc: &csi.NodeServiceCapability_RPC{
Type: csi.NodeServiceCapability_RPC_STAGE_UNSTAGE_VOLUME,
},
},
},
{
Type: &csi.NodeServiceCapability_Rpc{
Rpc: &csi.NodeServiceCapability_RPC{
Type: csi.NodeServiceCapability_RPC_EXPAND_VOLUME,
},
},
},
},
}, nil
}
func (s *service) NodeGetVolumeStats(
ctx context.Context,
req *csi.NodeGetVolumeStatsRequest) (
*csi.NodeGetVolumeStatsResponse, error) {
return nil, status.Error(codes.Unimplemented, "NodeGetVolumeStats not supported")
}
func (s *service) NodeExpandVolume(ctx context.Context, req *csi.NodeExpandVolumeRequest) (*csi.NodeExpandVolumeResponse, error) {
ctx, log, rid := GetRunidLog(ctx)
log.Debugf("Executing NodeExpandVolume with args: %+v", *req)
if req.VolumeId == "" {
return nil, status.Error(codes.InvalidArgument, utils.GetMessageWithRunID(rid, "volumeId is mandatory parameter"))
}
volID, _, arrayID, unity, err := s.validateAndGetResourceDetails(ctx, req.VolumeId, volumeType)
if err != nil {
return nil, err
}
size := req.GetCapacityRange().GetRequiredBytes()
ctx, log = setArrayIdContext(ctx, arrayID)
if err := s.requireProbe(ctx, arrayID); err != nil {
log.Debug("AutoProbe has not been called. Executing manual probe")
err = s.nodeProbe(ctx, arrayID)
if err != nil {
return nil, err
}
}
// We are getting target path that points to mounted path on "/"
// This doesn't help us, though we should trace the path received
volumePath := req.GetVolumePath()
if volumePath == "" {
return nil, status.Error(codes.InvalidArgument,
utils.GetMessageWithRunID(rid, "Volume path required"))
}
volumeAPI := gounity.NewVolume(unity)
volume, err := volumeAPI.FindVolumeById(ctx, volID)
if err != nil {
return nil, status.Error(codes.NotFound, utils.GetMessageWithRunID(rid, "Find volume Failed %v", err))
}
volName := volume.VolumeContent.Name
//Locate and fetch all (multipath/regular) mounted paths using this volume
devMnt, err := gofsutil.GetMountInfoFromDevice(ctx, volName)
if err != nil {
//No mounts found - Could be raw block device
volWwn := utils.GetWwnFromVolumeContentWwn(volume.VolumeContent.Wwn)
deviceNames, _ := gofsutil.GetSysBlockDevicesForVolumeWWN(context.Background(), volWwn)
if len(deviceNames) > 0 {
for _, deviceName := range deviceNames {
devicePath := sysBlock + "/" + deviceName
log.Infof("Rescanning raw block device %s to expand size", deviceName)
err = gofsutil.DeviceRescan(context.Background(), devicePath)
if err != nil {
log.Errorf("Failed to rescan device (%s) with error (%s)", devicePath, err.Error())
return nil, status.Error(codes.Internal, err.Error())
}
}
mpathName, err := getMpathDevFromWwn(ctx, volWwn)
if err != nil {
return nil, err
}
// Resize the corresponding multipath device
if mpathName != "" {
err = gofsutil.ResizeMultipath(ctx, mpathName)
if err != nil {
return nil, status.Error(codes.Internal,
utils.GetMessageWithRunID(rid, "Failed to resize multipath device (%s) with error %v", mpathName, err))
}
}
return &csi.NodeExpandVolumeResponse{}, nil
}
return nil, status.Error(codes.Internal,
utils.GetMessageWithRunID(rid, "Failed to find mount info for (%s) with error %v", volName, err))
}
log.Debugf("Mount info for volume %s: %+v", volName, devMnt)
// Rescan the device for the volume expanded on the array
for _, device := range devMnt.DeviceNames {
log.Debug("Begin rescan for :", device)
devicePath := sysBlock + "/" + device
err = gofsutil.DeviceRescan(ctx, devicePath)
if err != nil {
return nil, status.Error(codes.Internal,
utils.GetMessageWithRunID(rid, "Failed to rescan device (%s) with error %v", devicePath, err))
}
}
// Expand the filesystem with the actual expanded volume size.
if devMnt.MPathName != "" {
err = gofsutil.ResizeMultipath(ctx, devMnt.MPathName)
if err != nil {
return nil, status.Error(codes.Internal,
utils.GetMessageWithRunID(rid, "Failed to resize filesystem: device (%s) with error %v", devMnt.MountPoint, err))
}
}
//For a regular device, get the device path (devMnt.DeviceNames[1]) where the filesystem is mounted
//PublishVolume creates devMnt.DeviceNames[0] but is left unused for regular devices
var devicePath string
if len(devMnt.DeviceNames) > 1 {
devicePath = "/dev/" + devMnt.DeviceNames[1]
} else if len(devMnt.DeviceNames) == 1 {
devicePath = "/dev/" + devMnt.DeviceNames[0]
} else if devicePath == "" {
return nil, status.Error(codes.Internal,
utils.GetMessageWithRunID(rid, "Failed to resize filesystem: device name not found for (%s)", devMnt.MountPoint))
}
fsType, err := gofsutil.FindFSType(ctx, devMnt.MountPoint)
if err != nil {
return nil, status.Error(codes.Internal,
utils.GetMessageWithRunID(rid, "Failed to fetch filesystem for volume (%s) with error %v", devMnt.MountPoint, err))
}
log.Infof("Found %s filesystem mounted on volume %s", fsType, devMnt.MountPoint)
//Resize the filesystem
err = gofsutil.ResizeFS(ctx, devMnt.MountPoint, devicePath, devMnt.MPathName, fsType)
if err != nil {
return nil, status.Error(codes.Internal,
utils.GetMessageWithRunID(rid, "Failed to resize filesystem: mountpoint (%s) device (%s) with error %v",
devMnt.MountPoint, devicePath, err))
}
log.Debug("Node Expand completed successfully")
return &csi.NodeExpandVolumeResponse{CapacityBytes: size}, nil