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eth, les: update unclean shutdown markers regularly (ethereum#24077)
Fixes ethereum#22580 Co-authored-by: Felix Lange <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| // Copyright 2021 The go-ethereum Authors | ||
| // This file is part of the go-ethereum library. | ||
| // | ||
| // The go-ethereum library is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU Lesser General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // The go-ethereum library is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU Lesser General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU Lesser General Public License | ||
| // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. | ||
|
|
||
| package shutdowncheck | ||
|
|
||
| import ( | ||
| "time" | ||
|
|
||
| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/ethereum/go-ethereum/core/rawdb" | ||
| "github.com/ethereum/go-ethereum/ethdb" | ||
| "github.com/ethereum/go-ethereum/log" | ||
| ) | ||
|
|
||
| // ShutdownTracker is a service that reports previous unclean shutdowns | ||
| // upon start. It needs to be started after a successful start-up and stopped | ||
| // after a successful shutdown, just before the db is closed. | ||
| type ShutdownTracker struct { | ||
| db ethdb.Database | ||
| stopCh chan struct{} | ||
| } | ||
|
|
||
| // NewShutdownTracker creates a new ShutdownTracker instance and has | ||
| // no other side-effect. | ||
| func NewShutdownTracker(db ethdb.Database) *ShutdownTracker { | ||
| return &ShutdownTracker{ | ||
| db: db, | ||
| stopCh: make(chan struct{}), | ||
| } | ||
| } | ||
|
|
||
| // MarkStartup is to be called in the beginning when the node starts. It will: | ||
| // - Push a new startup marker to the db | ||
| // - Report previous unclean shutdowns | ||
| func (t *ShutdownTracker) MarkStartup() { | ||
| if uncleanShutdowns, discards, err := rawdb.PushUncleanShutdownMarker(t.db); err != nil { | ||
| log.Error("Could not update unclean-shutdown-marker list", "error", err) | ||
| } else { | ||
| if discards > 0 { | ||
| log.Warn("Old unclean shutdowns found", "count", discards) | ||
| } | ||
| for _, tstamp := range uncleanShutdowns { | ||
| t := time.Unix(int64(tstamp), 0) | ||
| log.Warn("Unclean shutdown detected", "booted", t, | ||
| "age", common.PrettyAge(t)) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Start runs an event loop that updates the current marker's timestamp every 5 minutes. | ||
| func (t *ShutdownTracker) Start() { | ||
| go func() { | ||
| ticker := time.NewTicker(5 * time.Minute) | ||
| defer ticker.Stop() | ||
| for { | ||
| select { | ||
| case <-ticker.C: | ||
| rawdb.UpdateUncleanShutdownMarker(t.db) | ||
| case <-t.stopCh: | ||
| return | ||
| } | ||
| } | ||
| }() | ||
| } | ||
|
|
||
| // Stop will stop the update loop and clear the current marker. | ||
| func (t *ShutdownTracker) Stop() { | ||
| // Stop update loop. | ||
| t.stopCh <- struct{}{} | ||
| // Clear last marker. | ||
| rawdb.PopUncleanShutdownMarker(t.db) | ||
| } |
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