mirror of
https://github.com/minio/minio.git
synced 2024-12-26 23:25:54 -05:00
eafa775952
- Add owner information for expiry, locking, unlocking a resource - TopLocks returns now locks in quorum by default, provides a way to capture stale locks as well with `?stale=true` - Simplify the quorum handling for locks to avoid from storage class, because there were challenges to make it consistent across all situations. - And other tiny simplifications to reset locks.
104 lines
3.2 KiB
Go
104 lines
3.2 KiB
Go
/*
|
|
* MinIO Cloud Storage, (C) 2019 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 madmin
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"io/ioutil"
|
|
"net/http"
|
|
"net/url"
|
|
"strconv"
|
|
"time"
|
|
)
|
|
|
|
// LockEntry holds information about client requesting the lock,
|
|
// servers holding the lock, source on the client machine,
|
|
// ID, type(read or write) and time stamp.
|
|
type LockEntry struct {
|
|
Timestamp time.Time `json:"time"` // When the lock was first granted
|
|
Resource string `json:"resource"` // Resource contains info like bucket+object
|
|
Type string `json:"type"` // Type indicates if 'Write' or 'Read' lock
|
|
Source string `json:"source"` // Source at which lock was granted
|
|
ServerList []string `json:"serverlist"` // List of servers participating in the lock.
|
|
Owner string `json:"owner"` // Owner UUID indicates server owns the lock.
|
|
ID string `json:"id"` // UID to uniquely identify request of client.
|
|
Quorum int `json:"quorum"` // represents quorum number of servers required to hold this lock, used to look for stale locks.
|
|
}
|
|
|
|
// LockEntries - To sort the locks
|
|
type LockEntries []LockEntry
|
|
|
|
func (l LockEntries) Len() int {
|
|
return len(l)
|
|
}
|
|
|
|
func (l LockEntries) Less(i, j int) bool {
|
|
return l[i].Timestamp.Before(l[j].Timestamp)
|
|
}
|
|
|
|
func (l LockEntries) Swap(i, j int) {
|
|
l[i], l[j] = l[j], l[i]
|
|
}
|
|
|
|
// TopLockOpts top lock options
|
|
type TopLockOpts struct {
|
|
Count int
|
|
Stale bool
|
|
}
|
|
|
|
// TopLocksWithOpts - returns the count number of oldest locks currently active on the server.
|
|
// additionally we can also enable `stale` to get stale locks currently present on server.
|
|
func (adm *AdminClient) TopLocksWithOpts(ctx context.Context, opts TopLockOpts) (LockEntries, error) {
|
|
// Execute GET on /minio/admin/v3/top/locks?count=10
|
|
// to get the 'count' number of oldest locks currently
|
|
// active on the server.
|
|
queryVals := make(url.Values)
|
|
queryVals.Set("count", strconv.Itoa(opts.Count))
|
|
queryVals.Set("stale", strconv.FormatBool(opts.Stale))
|
|
resp, err := adm.executeMethod(ctx,
|
|
http.MethodGet,
|
|
requestData{
|
|
relPath: adminAPIPrefix + "/top/locks",
|
|
queryValues: queryVals,
|
|
},
|
|
)
|
|
defer closeResponse(resp)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if resp.StatusCode != http.StatusOK {
|
|
return nil, httpRespToErrorResponse(resp)
|
|
}
|
|
|
|
response, err := ioutil.ReadAll(resp.Body)
|
|
if err != nil {
|
|
return LockEntries{}, err
|
|
}
|
|
|
|
var lockEntries LockEntries
|
|
err = json.Unmarshal(response, &lockEntries)
|
|
return lockEntries, err
|
|
}
|
|
|
|
// TopLocks - returns top '10' oldest locks currently active on the server.
|
|
func (adm *AdminClient) TopLocks(ctx context.Context) (LockEntries, error) {
|
|
return adm.TopLocksWithOpts(ctx, TopLockOpts{Count: 10})
|
|
}
|