9cdd981ce7
additionally also add a new ForceUnlock API, to allow forcibly unlocking locks if possible.
130 lines
3.8 KiB
Go
130 lines
3.8 KiB
Go
/*
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* MinIO Cloud Storage, (C) 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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*/
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package madmin
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import (
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"context"
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"encoding/json"
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"io/ioutil"
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"net/http"
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"net/url"
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"strconv"
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"strings"
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"time"
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)
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// LockEntry holds information about client requesting the lock,
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// servers holding the lock, source on the client machine,
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// ID, type(read or write) and time stamp.
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type LockEntry struct {
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Timestamp time.Time `json:"time"` // When the lock was first granted
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Resource string `json:"resource"` // Resource contains info like bucket+object
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Type string `json:"type"` // Type indicates if 'Write' or 'Read' lock
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Source string `json:"source"` // Source at which lock was granted
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ServerList []string `json:"serverlist"` // List of servers participating in the lock.
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Owner string `json:"owner"` // Owner UUID indicates server owns the lock.
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ID string `json:"id"` // UID to uniquely identify request of client.
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// Represents quorum number of servers required to hold this lock, used to look for stale locks.
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Quorum int `json:"quorum"`
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}
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// LockEntries - To sort the locks
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type LockEntries []LockEntry
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func (l LockEntries) Len() int {
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return len(l)
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}
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func (l LockEntries) Less(i, j int) bool {
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return l[i].Timestamp.Before(l[j].Timestamp)
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}
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func (l LockEntries) Swap(i, j int) {
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l[i], l[j] = l[j], l[i]
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}
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// TopLockOpts top lock options
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type TopLockOpts struct {
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Count int
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Stale bool
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}
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// ForceUnlock force unlocks input paths...
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func (adm *AdminClient) ForceUnlock(ctx context.Context, paths ...string) error {
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// Execute POST on /minio/admin/v3/force-unlock
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queryVals := make(url.Values)
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queryVals.Set("paths", strings.Join(paths, ","))
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resp, err := adm.executeMethod(ctx,
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http.MethodPost,
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requestData{
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relPath: adminAPIPrefix + "/force-unlock",
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queryValues: queryVals,
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},
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)
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defer closeResponse(resp)
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if err != nil {
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return err
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}
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if resp.StatusCode != http.StatusOK {
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return httpRespToErrorResponse(resp)
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}
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return nil
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}
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// TopLocksWithOpts - returns the count number of oldest locks currently active on the server.
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// additionally we can also enable `stale` to get stale locks currently present on server.
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func (adm *AdminClient) TopLocksWithOpts(ctx context.Context, opts TopLockOpts) (LockEntries, error) {
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// Execute GET on /minio/admin/v3/top/locks?count=10
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// to get the 'count' number of oldest locks currently
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// active on the server.
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queryVals := make(url.Values)
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queryVals.Set("count", strconv.Itoa(opts.Count))
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queryVals.Set("stale", strconv.FormatBool(opts.Stale))
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resp, err := adm.executeMethod(ctx,
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http.MethodGet,
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requestData{
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relPath: adminAPIPrefix + "/top/locks",
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queryValues: queryVals,
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},
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)
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defer closeResponse(resp)
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if err != nil {
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return nil, err
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}
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if resp.StatusCode != http.StatusOK {
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return nil, httpRespToErrorResponse(resp)
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}
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response, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return LockEntries{}, err
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}
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var lockEntries LockEntries
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err = json.Unmarshal(response, &lockEntries)
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return lockEntries, err
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}
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// TopLocks - returns top '10' oldest locks currently active on the server.
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func (adm *AdminClient) TopLocks(ctx context.Context) (LockEntries, error) {
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return adm.TopLocksWithOpts(ctx, TopLockOpts{Count: 10})
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}
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