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598 lines
17 KiB
598 lines
17 KiB
/*
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* MinIO Cloud Storage, (C) 2018-2019 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"bytes"
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"context"
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"crypto/tls"
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"encoding/gob"
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"encoding/hex"
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"io"
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"io/ioutil"
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"net/url"
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"path"
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"strconv"
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"strings"
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"sync/atomic"
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"github.com/minio/minio/cmd/http"
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"github.com/minio/minio/cmd/logger"
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"github.com/minio/minio/cmd/rest"
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xnet "github.com/minio/minio/pkg/net"
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)
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func isNetworkError(err error) bool {
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if err == nil {
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return false
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}
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if nerr, ok := err.(*rest.NetworkError); ok {
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return xnet.IsNetworkOrHostDown(nerr.Err)
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}
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return false
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}
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// Converts network error to storageErr. This function is
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// written so that the storageAPI errors are consistent
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// across network disks.
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func toStorageErr(err error) error {
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if err == nil {
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return nil
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}
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if isNetworkError(err) {
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return errDiskNotFound
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}
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switch err.Error() {
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case errFaultyDisk.Error():
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return errFaultyDisk
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case errFileCorrupt.Error():
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return errFileCorrupt
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case errUnexpected.Error():
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return errUnexpected
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case errDiskFull.Error():
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return errDiskFull
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case errVolumeNotFound.Error():
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return errVolumeNotFound
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case errVolumeExists.Error():
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return errVolumeExists
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case errFileNotFound.Error():
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return errFileNotFound
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case errFileNameTooLong.Error():
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return errFileNameTooLong
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case errFileAccessDenied.Error():
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return errFileAccessDenied
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case errIsNotRegular.Error():
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return errIsNotRegular
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case errVolumeNotEmpty.Error():
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return errVolumeNotEmpty
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case errVolumeAccessDenied.Error():
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return errVolumeAccessDenied
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case errCorruptedFormat.Error():
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return errCorruptedFormat
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case errUnformattedDisk.Error():
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return errUnformattedDisk
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case errInvalidAccessKeyID.Error():
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return errInvalidAccessKeyID
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case errAuthentication.Error():
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return errAuthentication
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case errRPCAPIVersionUnsupported.Error():
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return errRPCAPIVersionUnsupported
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case errServerTimeMismatch.Error():
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return errServerTimeMismatch
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case io.EOF.Error():
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return io.EOF
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case io.ErrUnexpectedEOF.Error():
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return io.ErrUnexpectedEOF
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case errDiskStale.Error():
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return errDiskNotFound
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}
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return err
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}
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// Abstracts a remote disk.
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type storageRESTClient struct {
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endpoint Endpoint
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restClient *rest.Client
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connected int32
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diskID string
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}
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// Wrapper to restClient.Call to handle network errors, in case of network error the connection is makred disconnected
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// permanently. The only way to restore the storage connection is at the xl-sets layer by xlsets.monitorAndConnectEndpoints()
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// after verifying format.json
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func (client *storageRESTClient) call(method string, values url.Values, body io.Reader, length int64) (io.ReadCloser, error) {
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if !client.IsOnline() {
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return nil, errDiskNotFound
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}
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if values == nil {
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values = make(url.Values)
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}
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values.Set(storageRESTDiskID, client.diskID)
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respBody, err := client.restClient.Call(method, values, body, length)
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if err == nil {
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return respBody, nil
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}
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err = toStorageErr(err)
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if err == errDiskNotFound {
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atomic.StoreInt32(&client.connected, 0)
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}
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return nil, err
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}
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// Stringer provides a canonicalized representation of network device.
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func (client *storageRESTClient) String() string {
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return client.endpoint.String()
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}
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// IsOnline - returns whether RPC client failed to connect or not.
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func (client *storageRESTClient) IsOnline() bool {
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return atomic.LoadInt32(&client.connected) == 1
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}
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func (client *storageRESTClient) IsLocal() bool {
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return false
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}
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func (client *storageRESTClient) Hostname() string {
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return client.endpoint.Host
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}
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func (client *storageRESTClient) CrawlAndGetDataUsage(ctx context.Context, cache dataUsageCache) (dataUsageCache, error) {
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b := cache.serialize()
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respBody, err := client.call(storageRESTMethodCrawlAndGetDataUsage,
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url.Values{},
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bytes.NewBuffer(b), int64(len(b)))
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defer http.DrainBody(respBody)
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if err != nil {
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return cache, err
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}
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reader, err := waitForHTTPResponse(respBody)
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if err != nil {
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return cache, err
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}
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b, err = ioutil.ReadAll(reader)
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if err != nil {
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return cache, err
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}
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var newCache dataUsageCache
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return newCache, newCache.deserialize(b)
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}
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func (client *storageRESTClient) GetDiskID() (string, error) {
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respBody, err := client.call(storageRESTMethodGetDiskID, nil, nil, -1)
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if err != nil {
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// Ignore when other nodes does not support GetDiskID call, this check
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// can be removed when the storage API version is bumped.
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if strings.Contains(err.Error(), "404 page not found") {
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return client.diskID, nil
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}
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return "", err
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}
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defer http.DrainBody(respBody)
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var s string
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err = gob.NewDecoder(respBody).Decode(&s)
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return s, err
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}
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func (client *storageRESTClient) SetDiskID(id string) {
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client.diskID = id
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}
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// DiskInfo - fetch disk information for a remote disk.
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func (client *storageRESTClient) DiskInfo() (info DiskInfo, err error) {
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respBody, err := client.call(storageRESTMethodDiskInfo, nil, nil, -1)
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if err != nil {
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return
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}
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defer http.DrainBody(respBody)
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err = gob.NewDecoder(respBody).Decode(&info)
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return info, err
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}
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// MakeVolBulk - create multiple volumes in a bulk operation.
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func (client *storageRESTClient) MakeVolBulk(volumes ...string) (err error) {
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values := make(url.Values)
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values.Set(storageRESTVolumes, strings.Join(volumes, ","))
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respBody, err := client.call(storageRESTMethodMakeVolBulk, values, nil, -1)
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defer http.DrainBody(respBody)
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return err
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}
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// MakeVol - create a volume on a remote disk.
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func (client *storageRESTClient) MakeVol(volume string) (err error) {
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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respBody, err := client.call(storageRESTMethodMakeVol, values, nil, -1)
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defer http.DrainBody(respBody)
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return err
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}
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// ListVols - List all volumes on a remote disk.
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func (client *storageRESTClient) ListVols() (volinfo []VolInfo, err error) {
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respBody, err := client.call(storageRESTMethodListVols, nil, nil, -1)
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if err != nil {
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return
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}
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defer http.DrainBody(respBody)
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err = gob.NewDecoder(respBody).Decode(&volinfo)
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return volinfo, err
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}
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// StatVol - get volume info over the network.
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func (client *storageRESTClient) StatVol(volume string) (volInfo VolInfo, err error) {
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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respBody, err := client.call(storageRESTMethodStatVol, values, nil, -1)
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if err != nil {
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return
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}
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defer http.DrainBody(respBody)
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err = gob.NewDecoder(respBody).Decode(&volInfo)
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return volInfo, err
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}
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// DeleteVol - Deletes a volume over the network.
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func (client *storageRESTClient) DeleteVol(volume string, forceDelete bool) (err error) {
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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if forceDelete {
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values.Set(storageRESTForceDelete, "true")
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}
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respBody, err := client.call(storageRESTMethodDeleteVol, values, nil, -1)
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defer http.DrainBody(respBody)
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return err
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}
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// AppendFile - append to a file.
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func (client *storageRESTClient) AppendFile(volume, path string, buffer []byte) error {
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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values.Set(storageRESTFilePath, path)
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reader := bytes.NewReader(buffer)
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respBody, err := client.call(storageRESTMethodAppendFile, values, reader, -1)
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defer http.DrainBody(respBody)
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return err
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}
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func (client *storageRESTClient) CreateFile(volume, path string, length int64, r io.Reader) error {
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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values.Set(storageRESTFilePath, path)
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values.Set(storageRESTLength, strconv.Itoa(int(length)))
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respBody, err := client.call(storageRESTMethodCreateFile, values, ioutil.NopCloser(r), length)
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defer http.DrainBody(respBody)
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return err
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}
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// WriteAll - write all data to a file.
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func (client *storageRESTClient) WriteAll(volume, path string, reader io.Reader) error {
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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values.Set(storageRESTFilePath, path)
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respBody, err := client.call(storageRESTMethodWriteAll, values, reader, -1)
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defer http.DrainBody(respBody)
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return err
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}
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// StatFile - stat a file.
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func (client *storageRESTClient) StatFile(volume, path string) (info FileInfo, err error) {
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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values.Set(storageRESTFilePath, path)
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respBody, err := client.call(storageRESTMethodStatFile, values, nil, -1)
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if err != nil {
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return info, err
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}
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defer http.DrainBody(respBody)
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err = gob.NewDecoder(respBody).Decode(&info)
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return info, err
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}
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// ReadAll - reads all contents of a file.
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func (client *storageRESTClient) ReadAll(volume, path string) ([]byte, error) {
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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values.Set(storageRESTFilePath, path)
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respBody, err := client.call(storageRESTMethodReadAll, values, nil, -1)
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if err != nil {
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return nil, err
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}
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defer http.DrainBody(respBody)
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return ioutil.ReadAll(respBody)
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}
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// ReadFileStream - returns a reader for the requested file.
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func (client *storageRESTClient) ReadFileStream(volume, path string, offset, length int64) (io.ReadCloser, error) {
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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values.Set(storageRESTFilePath, path)
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values.Set(storageRESTOffset, strconv.Itoa(int(offset)))
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values.Set(storageRESTLength, strconv.Itoa(int(length)))
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respBody, err := client.call(storageRESTMethodReadFileStream, values, nil, -1)
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if err != nil {
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return nil, err
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}
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return respBody, nil
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}
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// ReadFile - reads section of a file.
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func (client *storageRESTClient) ReadFile(volume, path string, offset int64, buffer []byte, verifier *BitrotVerifier) (int64, error) {
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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values.Set(storageRESTFilePath, path)
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values.Set(storageRESTOffset, strconv.Itoa(int(offset)))
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values.Set(storageRESTLength, strconv.Itoa(len(buffer)))
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if verifier != nil {
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values.Set(storageRESTBitrotAlgo, verifier.algorithm.String())
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values.Set(storageRESTBitrotHash, hex.EncodeToString(verifier.sum))
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} else {
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values.Set(storageRESTBitrotAlgo, "")
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values.Set(storageRESTBitrotHash, "")
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}
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respBody, err := client.call(storageRESTMethodReadFile, values, nil, -1)
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if err != nil {
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return 0, err
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}
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defer http.DrainBody(respBody)
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n, err := io.ReadFull(respBody, buffer)
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return int64(n), err
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}
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func (client *storageRESTClient) WalkSplunk(volume, dirPath, marker string, endWalkCh <-chan struct{}) (chan FileInfo, error) {
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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values.Set(storageRESTDirPath, dirPath)
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values.Set(storageRESTMarkerPath, marker)
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respBody, err := client.call(storageRESTMethodWalkSplunk, values, nil, -1)
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if err != nil {
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return nil, err
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}
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ch := make(chan FileInfo)
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go func() {
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defer close(ch)
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defer http.DrainBody(respBody)
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decoder := gob.NewDecoder(respBody)
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for {
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var fi FileInfo
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if gerr := decoder.Decode(&fi); gerr != nil {
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// Upon error return
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return
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}
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select {
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case ch <- fi:
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case <-endWalkCh:
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return
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}
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}
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}()
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return ch, nil
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}
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func (client *storageRESTClient) Walk(volume, dirPath, marker string, recursive bool, leafFile string,
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readMetadataFn readMetadataFunc, endWalkCh <-chan struct{}) (chan FileInfo, error) {
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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values.Set(storageRESTDirPath, dirPath)
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values.Set(storageRESTMarkerPath, marker)
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values.Set(storageRESTRecursive, strconv.FormatBool(recursive))
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values.Set(storageRESTLeafFile, leafFile)
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respBody, err := client.call(storageRESTMethodWalk, values, nil, -1)
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if err != nil {
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return nil, err
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}
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ch := make(chan FileInfo)
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go func() {
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defer close(ch)
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defer http.DrainBody(respBody)
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decoder := gob.NewDecoder(respBody)
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for {
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var fi FileInfo
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if gerr := decoder.Decode(&fi); gerr != nil {
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// Upon error return
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return
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}
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select {
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case ch <- fi:
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case <-endWalkCh:
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return
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}
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}
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}()
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return ch, nil
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}
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// ListDir - lists a directory.
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func (client *storageRESTClient) ListDir(volume, dirPath string, count int, leafFile string) (entries []string, err error) {
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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values.Set(storageRESTDirPath, dirPath)
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values.Set(storageRESTCount, strconv.Itoa(count))
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values.Set(storageRESTLeafFile, leafFile)
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respBody, err := client.call(storageRESTMethodListDir, values, nil, -1)
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if err != nil {
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return nil, err
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}
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defer http.DrainBody(respBody)
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err = gob.NewDecoder(respBody).Decode(&entries)
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return entries, err
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}
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// DeleteFile - deletes a file.
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func (client *storageRESTClient) DeleteFile(volume, path string) error {
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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values.Set(storageRESTFilePath, path)
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respBody, err := client.call(storageRESTMethodDeleteFile, values, nil, -1)
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defer http.DrainBody(respBody)
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return err
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}
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// DeleteFileBulk - deletes files in bulk.
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func (client *storageRESTClient) DeleteFileBulk(volume string, paths []string) (errs []error, err error) {
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if len(paths) == 0 {
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return errs, err
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}
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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var buffer bytes.Buffer
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for _, path := range paths {
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buffer.WriteString(path)
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buffer.WriteString("\n")
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}
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respBody, err := client.call(storageRESTMethodDeleteFileBulk, values, &buffer, -1)
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defer http.DrainBody(respBody)
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if err != nil {
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return nil, err
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}
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reader, err := waitForHTTPResponse(respBody)
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if err != nil {
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return nil, err
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}
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dErrResp := &DeleteFileBulkErrsResp{}
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if err = gob.NewDecoder(reader).Decode(dErrResp); err != nil {
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return nil, err
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}
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for _, dErr := range dErrResp.Errs {
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errs = append(errs, toStorageErr(dErr))
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}
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return errs, nil
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}
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// DeletePrefixes - deletes prefixes in bulk.
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func (client *storageRESTClient) DeletePrefixes(volume string, paths []string) (errs []error, err error) {
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if len(paths) == 0 {
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return errs, err
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}
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values := make(url.Values)
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values.Set(storageRESTVolume, volume)
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var buffer bytes.Buffer
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for _, path := range paths {
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buffer.WriteString(path)
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buffer.WriteString("\n")
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}
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respBody, err := client.call(storageRESTMethodDeletePrefixes, values, &buffer, -1)
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defer http.DrainBody(respBody)
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if err != nil {
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return nil, err
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}
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reader, err := waitForHTTPResponse(respBody)
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if err != nil {
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return nil, err
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}
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dErrResp := &DeletePrefixesErrsResp{}
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if err = gob.NewDecoder(reader).Decode(dErrResp); err != nil {
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return nil, err
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}
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for _, dErr := range dErrResp.Errs {
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errs = append(errs, toStorageErr(dErr))
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}
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return errs, nil
|
|
}
|
|
|
|
// 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, size int64, algo BitrotAlgorithm, sum []byte, shardSize int64) error {
|
|
values := make(url.Values)
|
|
values.Set(storageRESTVolume, volume)
|
|
values.Set(storageRESTFilePath, path)
|
|
values.Set(storageRESTBitrotAlgo, algo.String())
|
|
values.Set(storageRESTLength, strconv.FormatInt(size, 10))
|
|
values.Set(storageRESTShardSize, strconv.Itoa(int(shardSize)))
|
|
values.Set(storageRESTBitrotHash, hex.EncodeToString(sum))
|
|
|
|
respBody, err := client.call(storageRESTMethodVerifyFile, values, nil, -1)
|
|
defer http.DrainBody(respBody)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
reader, err := waitForHTTPResponse(respBody)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
verifyResp := &VerifyFileResp{}
|
|
if err = gob.NewDecoder(reader).Decode(verifyResp); err != nil {
|
|
return err
|
|
}
|
|
return toStorageErr(verifyResp.Err)
|
|
}
|
|
|
|
// Close - marks the client as closed.
|
|
func (client *storageRESTClient) Close() error {
|
|
atomic.StoreInt32(&client.connected, 0)
|
|
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, err := rest.NewClient(serverURL, trFn, newAuthToken)
|
|
if err != nil {
|
|
logger.LogIf(GlobalContext, err)
|
|
return &storageRESTClient{endpoint: endpoint, restClient: restClient, connected: 0}
|
|
}
|
|
return &storageRESTClient{endpoint: endpoint, restClient: restClient, connected: 1}
|
|
}
|
|
|