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minio/cmd/storage-rest-client.go

682 lines
19 KiB

/*
* MinIO Cloud Storage, (C) 2018-2020 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"bytes"
"context"
"crypto/tls"
"encoding/gob"
"encoding/hex"
"errors"
"io"
"io/ioutil"
"net/url"
"path"
"strconv"
"strings"
"time"
"github.com/minio/minio/cmd/http"
xhttp "github.com/minio/minio/cmd/http"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/cmd/rest"
xnet "github.com/minio/minio/pkg/net"
)
func isNetworkError(err error) bool {
if err == nil {
return false
}
if nerr, ok := err.(*rest.NetworkError); ok {
return xnet.IsNetworkOrHostDown(nerr.Err)
}
return false
}
// Converts network error to storageErr. This function is
// written so that the storageAPI errors are consistent
// across network disks.
func toStorageErr(err error) error {
if err == nil {
return nil
}
if isNetworkError(err) {
return errDiskNotFound
}
switch err.Error() {
case errFaultyDisk.Error():
return errFaultyDisk
case errFileCorrupt.Error():
return errFileCorrupt
case errUnexpected.Error():
return errUnexpected
case errDiskFull.Error():
return errDiskFull
case errVolumeNotFound.Error():
return errVolumeNotFound
case errVolumeExists.Error():
return errVolumeExists
case errFileNotFound.Error():
return errFileNotFound
case errFileNameTooLong.Error():
return errFileNameTooLong
case errFileAccessDenied.Error():
return errFileAccessDenied
case errIsNotRegular.Error():
return errIsNotRegular
case errVolumeNotEmpty.Error():
return errVolumeNotEmpty
case errVolumeAccessDenied.Error():
return errVolumeAccessDenied
case errCorruptedFormat.Error():
return errCorruptedFormat
case errUnformattedDisk.Error():
return errUnformattedDisk
case errInvalidAccessKeyID.Error():
return errInvalidAccessKeyID
case errAuthentication.Error():
return errAuthentication
case errRPCAPIVersionUnsupported.Error():
return errRPCAPIVersionUnsupported
case errServerTimeMismatch.Error():
return errServerTimeMismatch
case io.EOF.Error():
return io.EOF
case io.ErrUnexpectedEOF.Error():
return io.ErrUnexpectedEOF
case errDiskStale.Error():
return errDiskNotFound
}
return err
}
// Abstracts a remote disk.
type storageRESTClient struct {
endpoint Endpoint
restClient *rest.Client
diskID string
}
// Wrapper to restClient.Call to handle network errors, in case of network error the connection is makred disconnected
// permanently. The only way to restore the storage connection is at the xl-sets layer by xlsets.monitorAndConnectEndpoints()
// after verifying format.json
func (client *storageRESTClient) call(method string, values url.Values, body io.Reader, length int64) (io.ReadCloser, error) {
if !client.IsOnline() {
return nil, errDiskNotFound
}
if values == nil {
values = make(url.Values)
}
values.Set(storageRESTDiskID, client.diskID)
respBody, err := client.restClient.Call(method, values, body, length)
if err == nil {
return respBody, nil
}
err = toStorageErr(err)
return nil, err
}
// Stringer provides a canonicalized representation of network device.
func (client *storageRESTClient) String() string {
return client.endpoint.String()
}
// IsOnline - returns whether RPC client failed to connect or not.
func (client *storageRESTClient) IsOnline() bool {
return client.restClient.IsOnline()
}
func (client *storageRESTClient) IsLocal() bool {
return false
}
func (client *storageRESTClient) Hostname() string {
return client.endpoint.Host
}
func (client *storageRESTClient) CrawlAndGetDataUsage(ctx context.Context, cache dataUsageCache) (dataUsageCache, error) {
b := cache.serialize()
respBody, err := client.call(storageRESTMethodCrawlAndGetDataUsage,
url.Values{},
bytes.NewBuffer(b), int64(len(b)))
defer http.DrainBody(respBody)
if err != nil {
return cache, err
}
reader, err := waitForHTTPResponse(respBody)
if err != nil {
return cache, err
}
var newCache dataUsageCache
return newCache, newCache.deserialize(reader)
}
func (client *storageRESTClient) GetDiskID() (string, error) {
// This call should never be over the network, this is always
// a cached value - caller should make sure to use this
// function on a fresh disk or make sure to look at the error
// from a different networked call to validate the GetDiskID()
return client.diskID, nil
}
func (client *storageRESTClient) SetDiskID(id string) {
client.diskID = id
}
// DiskInfo - fetch disk information for a remote disk.
func (client *storageRESTClient) DiskInfo() (info DiskInfo, err error) {
respBody, err := client.call(storageRESTMethodDiskInfo, nil, nil, -1)
if err != nil {
return
}
defer http.DrainBody(respBody)
err = gob.NewDecoder(respBody).Decode(&info)
if err != nil {
return info, err
}
if info.Error != "" {
return info, toStorageErr(errors.New(info.Error))
}
return info, nil
}
// MakeVolBulk - create multiple volumes in a bulk operation.
func (client *storageRESTClient) MakeVolBulk(volumes ...string) (err error) {
values := make(url.Values)
values.Set(storageRESTVolumes, strings.Join(volumes, ","))
respBody, err := client.call(storageRESTMethodMakeVolBulk, values, nil, -1)
defer http.DrainBody(respBody)
return err
}
// MakeVol - create a volume on a remote disk.
func (client *storageRESTClient) MakeVol(volume string) (err error) {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
respBody, err := client.call(storageRESTMethodMakeVol, values, nil, -1)
defer http.DrainBody(respBody)
return err
}
// ListVols - List all volumes on a remote disk.
func (client *storageRESTClient) ListVols() (volinfo []VolInfo, err error) {
respBody, err := client.call(storageRESTMethodListVols, nil, nil, -1)
if err != nil {
return
}
defer http.DrainBody(respBody)
err = gob.NewDecoder(respBody).Decode(&volinfo)
return volinfo, err
}
// StatVol - get volume info over the network.
func (client *storageRESTClient) StatVol(volume string) (volInfo VolInfo, err error) {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
respBody, err := client.call(storageRESTMethodStatVol, values, nil, -1)
if err != nil {
return
}
defer http.DrainBody(respBody)
err = gob.NewDecoder(respBody).Decode(&volInfo)
return volInfo, err
}
// DeleteVol - Deletes a volume over the network.
func (client *storageRESTClient) DeleteVol(volume string, forceDelete bool) (err error) {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
if forceDelete {
values.Set(storageRESTForceDelete, "true")
}
respBody, err := client.call(storageRESTMethodDeleteVol, values, nil, -1)
defer http.DrainBody(respBody)
return err
}
// AppendFile - append to a file.
func (client *storageRESTClient) AppendFile(volume, path string, buffer []byte) error {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTFilePath, path)
reader := bytes.NewReader(buffer)
respBody, err := client.call(storageRESTMethodAppendFile, values, reader, -1)
defer http.DrainBody(respBody)
return err
}
func (client *storageRESTClient) CreateFile(volume, path string, length int64, r io.Reader) error {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTFilePath, path)
values.Set(storageRESTLength, strconv.Itoa(int(length)))
respBody, err := client.call(storageRESTMethodCreateFile, values, ioutil.NopCloser(r), length)
defer http.DrainBody(respBody)
return err
}
func (client *storageRESTClient) WriteMetadata(volume, path string, fi FileInfo) error {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTFilePath, path)
var reader bytes.Buffer
if err := gob.NewEncoder(&reader).Encode(fi); err != nil {
return err
}
respBody, err := client.call(storageRESTMethodWriteMetadata, values, &reader, -1)
defer http.DrainBody(respBody)
return err
}
func (client *storageRESTClient) DeleteVersion(volume, path string, fi FileInfo) error {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTFilePath, path)
var buffer bytes.Buffer
if err := gob.NewEncoder(&buffer).Encode(fi); err != nil {
return err
}
respBody, err := client.call(storageRESTMethodDeleteVersion, values, &buffer, -1)
defer http.DrainBody(respBody)
return err
}
// WriteAll - write all data to a file.
func (client *storageRESTClient) WriteAll(volume, path string, reader io.Reader) error {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTFilePath, path)
respBody, err := client.call(storageRESTMethodWriteAll, values, reader, -1)
defer http.DrainBody(respBody)
return err
}
// CheckFile - stat a file metadata.
func (client *storageRESTClient) CheckFile(volume, path string) error {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTFilePath, path)
respBody, err := client.call(storageRESTMethodCheckFile, values, nil, -1)
defer http.DrainBody(respBody)
return err
}
// CheckParts - stat all file parts.
func (client *storageRESTClient) CheckParts(volume, path string, fi FileInfo) error {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTFilePath, path)
var reader bytes.Buffer
if err := gob.NewEncoder(&reader).Encode(fi); err != nil {
return err
}
respBody, err := client.call(storageRESTMethodWriteMetadata, values, &reader, -1)
defer http.DrainBody(respBody)
return err
}
// RenameData - rename source path to destination path atomically, metadata and data file.
func (client *storageRESTClient) RenameData(srcVolume, srcPath, dataDir, dstVolume, dstPath string) (err error) {
values := make(url.Values)
values.Set(storageRESTSrcVolume, srcVolume)
values.Set(storageRESTSrcPath, srcPath)
values.Set(storageRESTDataDir, dataDir)
values.Set(storageRESTDstVolume, dstVolume)
values.Set(storageRESTDstPath, dstPath)
respBody, err := client.call(storageRESTMethodRenameData, values, nil, -1)
defer http.DrainBody(respBody)
return err
}
func (client *storageRESTClient) ReadVersion(volume, path, versionID string) (fi FileInfo, err error) {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTFilePath, path)
values.Set(storageRESTVersionID, versionID)
respBody, err := client.call(storageRESTMethodReadVersion, values, nil, -1)
if err != nil {
return fi, err
}
defer http.DrainBody(respBody)
err = gob.NewDecoder(respBody).Decode(&fi)
return fi, err
}
// ReadAll - reads all contents of a file.
func (client *storageRESTClient) ReadAll(volume, path string) ([]byte, error) {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTFilePath, path)
respBody, err := client.call(storageRESTMethodReadAll, values, nil, -1)
if err != nil {
return nil, err
}
defer http.DrainBody(respBody)
return ioutil.ReadAll(respBody)
}
// ReadFileStream - returns a reader for the requested file.
func (client *storageRESTClient) ReadFileStream(volume, path string, offset, length int64) (io.ReadCloser, error) {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTFilePath, path)
values.Set(storageRESTOffset, strconv.Itoa(int(offset)))
values.Set(storageRESTLength, strconv.Itoa(int(length)))
respBody, err := client.call(storageRESTMethodReadFileStream, values, nil, -1)
if err != nil {
return nil, err
}
return respBody, nil
}
// ReadFile - reads section of a file.
func (client *storageRESTClient) ReadFile(volume, path string, offset int64, buffer []byte, verifier *BitrotVerifier) (int64, error) {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTFilePath, path)
values.Set(storageRESTOffset, strconv.Itoa(int(offset)))
values.Set(storageRESTLength, strconv.Itoa(len(buffer)))
if verifier != nil {
values.Set(storageRESTBitrotAlgo, verifier.algorithm.String())
values.Set(storageRESTBitrotHash, hex.EncodeToString(verifier.sum))
} else {
values.Set(storageRESTBitrotAlgo, "")
values.Set(storageRESTBitrotHash, "")
}
respBody, err := client.call(storageRESTMethodReadFile, values, nil, -1)
if err != nil {
return 0, err
}
defer http.DrainBody(respBody)
n, err := io.ReadFull(respBody, buffer)
return int64(n), err
}
func (client *storageRESTClient) WalkSplunk(volume, dirPath, marker string, endWalkCh <-chan struct{}) (chan FileInfo, error) {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTDirPath, dirPath)
values.Set(storageRESTMarkerPath, marker)
respBody, err := client.call(storageRESTMethodWalkSplunk, values, nil, -1)
if err != nil {
return nil, err
}
ch := make(chan FileInfo)
go func() {
defer close(ch)
defer http.DrainBody(respBody)
decoder := gob.NewDecoder(respBody)
for {
var fi FileInfo
if gerr := decoder.Decode(&fi); gerr != nil {
// Upon error return
return
}
select {
case ch <- fi:
case <-endWalkCh:
return
}
}
}()
return ch, nil
}
func (client *storageRESTClient) WalkVersions(volume, dirPath, marker string, recursive bool, endWalkCh <-chan struct{}) (chan FileInfoVersions, error) {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTDirPath, dirPath)
values.Set(storageRESTMarkerPath, marker)
values.Set(storageRESTRecursive, strconv.FormatBool(recursive))
respBody, err := client.call(storageRESTMethodWalkVersions, values, nil, -1)
if err != nil {
return nil, err
}
ch := make(chan FileInfoVersions)
go func() {
defer close(ch)
defer http.DrainBody(respBody)
decoder := gob.NewDecoder(respBody)
for {
var fi FileInfoVersions
if gerr := decoder.Decode(&fi); gerr != nil {
// Upon error return
if gerr != io.EOF {
logger.LogIf(context.Background(), gerr)
}
return
}
select {
case ch <- fi:
case <-endWalkCh:
return
}
}
}()
return ch, nil
}
func (client *storageRESTClient) Walk(volume, dirPath, marker string, recursive bool, endWalkCh <-chan struct{}) (chan FileInfo, error) {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTDirPath, dirPath)
values.Set(storageRESTMarkerPath, marker)
values.Set(storageRESTRecursive, strconv.FormatBool(recursive))
respBody, err := client.call(storageRESTMethodWalk, values, nil, -1)
if err != nil {
return nil, err
}
ch := make(chan FileInfo)
go func() {
defer close(ch)
defer http.DrainBody(respBody)
decoder := gob.NewDecoder(respBody)
for {
var fi FileInfo
if gerr := decoder.Decode(&fi); gerr != nil {
// Upon error return
return
}
select {
case ch <- fi:
case <-endWalkCh:
return
}
}
}()
return ch, nil
}
// ListDir - lists a directory.
func (client *storageRESTClient) ListDir(volume, dirPath string, count int) (entries []string, err error) {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTDirPath, dirPath)
values.Set(storageRESTCount, strconv.Itoa(count))
respBody, err := client.call(storageRESTMethodListDir, values, nil, -1)
if err != nil {
return nil, err
}
defer http.DrainBody(respBody)
err = gob.NewDecoder(respBody).Decode(&entries)
return entries, err
}
// DeleteFile - deletes a file.
func (client *storageRESTClient) DeleteFile(volume, path string) error {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTFilePath, path)
respBody, err := client.call(storageRESTMethodDeleteFile, values, nil, -1)
defer http.DrainBody(respBody)
return err
}
// DeleteVersions - deletes list of specified versions if present
func (client *storageRESTClient) DeleteVersions(volume string, versions []FileInfo) (errs []error) {
if len(versions) == 0 {
return errs
}
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTTotalVersions, strconv.Itoa(len(versions)))
var buffer bytes.Buffer
encoder := gob.NewEncoder(&buffer)
for _, version := range versions {
encoder.Encode(&version)
}
errs = make([]error, len(versions))
respBody, err := client.call(storageRESTMethodDeleteVersions, values, &buffer, -1)
defer http.DrainBody(respBody)
if err != nil {
for i := range errs {
errs[i] = err
}
return errs
}
reader, err := waitForHTTPResponse(respBody)
if err != nil {
for i := range errs {
errs[i] = err
}
return errs
}
dErrResp := &DeleteVersionsErrsResp{}
if err = gob.NewDecoder(reader).Decode(dErrResp); err != nil {
for i := range errs {
errs[i] = err
}
return errs
}
for i, dErr := range dErrResp.Errs {
errs[i] = toStorageErr(dErr)
}
return errs
}
// RenameFile - renames a file.
func (client *storageRESTClient) RenameFile(srcVolume, srcPath, dstVolume, dstPath string) (err error) {
values := make(url.Values)
values.Set(storageRESTSrcVolume, srcVolume)
values.Set(storageRESTSrcPath, srcPath)
values.Set(storageRESTDstVolume, dstVolume)
values.Set(storageRESTDstPath, dstPath)
respBody, err := client.call(storageRESTMethodRenameFile, values, nil, -1)
defer http.DrainBody(respBody)
return err
}
func (client *storageRESTClient) VerifyFile(volume, path string, fi FileInfo) error {
values := make(url.Values)
values.Set(storageRESTVolume, volume)
values.Set(storageRESTFilePath, path)
var reader bytes.Buffer
if err := gob.NewEncoder(&reader).Encode(fi); err != nil {
return err
}
respBody, err := client.call(storageRESTMethodVerifyFile, values, &reader, -1)
defer http.DrainBody(respBody)
if err != nil {
return err
}
respReader, err := waitForHTTPResponse(respBody)
if err != nil {
return err
}
verifyResp := &VerifyFileResp{}
if err = gob.NewDecoder(respReader).Decode(verifyResp); err != nil {
return err
}
return toStorageErr(verifyResp.Err)
}
// Close - marks the client as closed.
func (client *storageRESTClient) Close() error {
client.restClient.Close()
return nil
}
// Returns a storage rest client.
func newStorageRESTClient(endpoint Endpoint) *storageRESTClient {
serverURL := &url.URL{
Scheme: endpoint.Scheme,
Host: endpoint.Host,
Path: path.Join(storageRESTPrefix, endpoint.Path, storageRESTVersion),
}
var tlsConfig *tls.Config
if globalIsSSL {
tlsConfig = &tls.Config{
ServerName: endpoint.Hostname(),
RootCAs: globalRootCAs,
NextProtos: []string{"http/1.1"}, // Force http1.1
}
}
trFn := newCustomHTTPTransport(tlsConfig, rest.DefaultRESTTimeout)
restClient := rest.NewClient(serverURL, trFn, newAuthToken)
restClient.HealthCheckInterval = 500 * time.Millisecond
restClient.HealthCheckFn = func() bool {
ctx, cancel := context.WithTimeout(GlobalContext, restClient.HealthCheckTimeout)
// Instantiate a new rest client for healthcheck
// to avoid recursive healthCheckFn()
respBody, err := rest.NewClient(serverURL, trFn, newAuthToken).CallWithContext(ctx, storageRESTMethodHealth, nil, nil, -1)
xhttp.DrainBody(respBody)
cancel()
return !errors.Is(err, context.DeadlineExceeded) && toStorageErr(err) != errDiskNotFound
}
return &storageRESTClient{endpoint: endpoint, restClient: restClient}
}