minio/cmd/daily-lifecycle-ops.go
Harshavardhana 822eb5ddc7 Bring in safe mode support (#8478)
This PR refactors object layer handling such
that upon failure in sub-system initialization
server reaches a stage of safe-mode operation
wherein only certain API operations are enabled
and available.

This allows for fixing many scenarios such as

 - incorrect configuration in vault, etcd,
   notification targets
 - missing files, incomplete config migrations
   unable to read encrypted content etc
 - any other issues related to notification,
   policies, lifecycle etc
2019-11-09 09:27:23 -08:00

187 lines
4.7 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 cmd
import (
"context"
"time"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/event"
"github.com/minio/minio/pkg/lifecycle"
)
const (
bgLifecycleInterval = 24 * time.Hour
bgLifecycleTick = time.Hour
)
type lifecycleOps struct {
LastActivity time.Time
}
// Register to the daily objects listing
var globalLifecycleOps = &lifecycleOps{}
func getLocalBgLifecycleOpsStatus() BgLifecycleOpsStatus {
return BgLifecycleOpsStatus{
LastActivity: globalLifecycleOps.LastActivity,
}
}
// initDailyLifecycle starts the routine that receives the daily
// listing of all objects and applies any matching bucket lifecycle
// rules.
func initDailyLifecycle() {
go startDailyLifecycle()
}
func startDailyLifecycle() {
var objAPI ObjectLayer
var ctx = context.Background()
// Wait until the object API is ready
for {
objAPI = newObjectLayerWithoutSafeModeFn()
if objAPI == nil {
time.Sleep(time.Second)
continue
}
break
}
// Calculate the time of the last lifecycle operation in all peers node of the cluster
computeLastLifecycleActivity := func(status []BgOpsStatus) time.Time {
var lastAct time.Time
for _, st := range status {
if st.LifecycleOps.LastActivity.After(lastAct) {
lastAct = st.LifecycleOps.LastActivity
}
}
return lastAct
}
for {
// Check if we should perform lifecycle ops based on the last lifecycle activity, sleep one hour otherwise
allLifecycleStatus := []BgOpsStatus{
{LifecycleOps: getLocalBgLifecycleOpsStatus()},
}
if globalIsDistXL {
allLifecycleStatus = append(allLifecycleStatus, globalNotificationSys.BackgroundOpsStatus()...)
}
lastAct := computeLastLifecycleActivity(allLifecycleStatus)
if !lastAct.IsZero() && time.Since(lastAct) < bgLifecycleInterval {
time.Sleep(bgLifecycleTick)
}
// Perform one lifecycle operation
err := lifecycleRound(ctx, objAPI)
switch err.(type) {
// Unable to hold a lock means there is another
// instance doing the lifecycle round round
case OperationTimedOut:
time.Sleep(bgLifecycleTick)
default:
logger.LogIf(ctx, err)
time.Sleep(time.Minute)
continue
}
}
}
var lifecycleTimeout = newDynamicTimeout(60*time.Second, time.Second)
func lifecycleRound(ctx context.Context, objAPI ObjectLayer) error {
// Lock to avoid concurrent lifecycle ops from other nodes
sweepLock := globalNSMutex.NewNSLock(ctx, "system", "daily-lifecycle-ops")
if err := sweepLock.GetLock(lifecycleTimeout); err != nil {
return err
}
defer sweepLock.Unlock()
buckets, err := objAPI.ListBuckets(ctx)
if err != nil {
return err
}
for _, bucket := range buckets {
// Check if the current bucket has a configured lifecycle policy, skip otherwise
l, ok := globalLifecycleSys.Get(bucket.Name)
if !ok {
continue
}
// Calculate the common prefix of all lifecycle rules
var prefixes []string
for _, rule := range l.Rules {
prefixes = append(prefixes, rule.Filter.Prefix)
}
commonPrefix := lcp(prefixes)
// List all objects and calculate lifecycle action based on object name & object modtime
marker := ""
for {
res, err := objAPI.ListObjects(ctx, bucket.Name, commonPrefix, marker, "", maxObjectList)
if err != nil {
continue
}
var objects []string
for _, obj := range res.Objects {
// Find the action that need to be executed
action := l.ComputeAction(obj.Name, obj.ModTime)
switch action {
case lifecycle.DeleteAction:
objects = append(objects, obj.Name)
default:
// Do nothing, for now.
}
}
// Deletes a list of objects.
deleteErrs, err := objAPI.DeleteObjects(ctx, bucket.Name, objects)
if err != nil {
logger.LogIf(ctx, err)
} else {
for i := range deleteErrs {
if deleteErrs[i] != nil {
logger.LogIf(ctx, deleteErrs[i])
continue
}
// Notify object deleted event.
sendEvent(eventArgs{
EventName: event.ObjectRemovedDelete,
BucketName: bucket.Name,
Object: ObjectInfo{
Name: objects[i],
},
Host: "Internal: [ILM-EXPIRY]",
})
}
}
if !res.IsTruncated {
// We are done here, proceed to next bucket.
break
}
marker = res.NextMarker
}
}
return nil
}