139 lines
2.7 KiB
Go
139 lines
2.7 KiB
Go
package journal
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import (
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"encoding/json"
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"fmt"
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"os"
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"path/filepath"
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"sync"
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"golang.org/x/xerrors"
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"github.com/filecoin-project/lotus/build"
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"github.com/filecoin-project/lotus/node/repo"
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)
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const RFC3339nocolon = "2006-01-02T150405Z0700"
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// fsJournal is a basic journal backed by files on a filesystem.
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type fsJournal struct {
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EventTypeRegistry
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dir string
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sizeLimit int64
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lk sync.Mutex
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fi *os.File
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fSize int64
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incoming chan *Event
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closing chan struct{}
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closed chan struct{}
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}
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// OpenFSJournal constructs a rolling filesystem journal, with a default
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// per-file size limit of 1GiB.
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func OpenFSJournal(lr repo.LockedRepo, disabled DisabledEvents) (Journal, error) {
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dir := filepath.Join(lr.Path(), "journal")
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if err := os.MkdirAll(dir, 0755); err != nil {
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return nil, fmt.Errorf("failed to mk directory %s for file journal: %w", dir, err)
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}
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f := &fsJournal{
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EventTypeRegistry: NewEventTypeRegistry(disabled),
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dir: dir,
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sizeLimit: 1 << 30,
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incoming: make(chan *Event, 32),
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closing: make(chan struct{}),
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closed: make(chan struct{}),
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}
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if err := f.rollJournalFile(); err != nil {
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return nil, err
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}
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go f.runLoop()
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return f, nil
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}
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func (f *fsJournal) RecordEvent(evtType EventType, supplier func() interface{}) {
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defer func() {
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if r := recover(); r != nil {
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log.Warnf("recovered from panic while recording journal event; type=%s, err=%v", evtType, r)
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}
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}()
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if !evtType.Enabled() {
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return
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}
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je := &Event{
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EventType: evtType,
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Timestamp: build.Clock.Now(),
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Data: supplier(),
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}
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select {
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case f.incoming <- je:
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case <-f.closing:
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log.Warnw("journal closed but tried to log event", "event", je)
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}
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}
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func (f *fsJournal) Close() error {
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close(f.closing)
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<-f.closed
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return nil
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}
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func (f *fsJournal) putEvent(evt *Event) error {
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b, err := json.Marshal(evt)
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if err != nil {
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return err
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}
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n, err := f.fi.Write(append(b, '\n'))
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if err != nil {
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return err
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}
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f.fSize += int64(n)
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if f.fSize >= f.sizeLimit {
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_ = f.rollJournalFile()
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}
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return nil
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}
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func (f *fsJournal) rollJournalFile() error {
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if f.fi != nil {
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_ = f.fi.Close()
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}
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nfi, err := os.Create(filepath.Join(f.dir, fmt.Sprintf("lotus-journal-%s.ndjson", build.Clock.Now().Format(RFC3339nocolon))))
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if err != nil {
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return xerrors.Errorf("failed to open journal file: %w", err)
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}
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f.fi = nfi
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f.fSize = 0
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return nil
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}
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func (f *fsJournal) runLoop() {
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defer close(f.closed)
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for {
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select {
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case je := <-f.incoming:
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if err := f.putEvent(je); err != nil {
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log.Errorw("failed to write out journal event", "event", je, "err", err)
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}
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case <-f.closing:
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_ = f.fi.Close()
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return
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}
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}
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}
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