op-supervisor: Create logdb for each chain.

op-supervisor/metrics/metrics.go

@@ -19,6 +19,9 @@ type Metricer interface {
 	CacheAdd(chainID *big.Int, label string, cacheSize int, evicted bool)
 	CacheGet(chainID *big.Int, label string, hit bool)
 
+	RecordDBEntryCount(chainID *big.Int, count int64)
+	RecordDBSearchEntriesRead(chainID *big.Int, count int64)
+
 	Document() []opmetrics.DocumentedMetric
 }
 
@@ -29,9 +32,12 @@ type Metrics struct {
 
 	opmetrics.RPCMetrics
 
-	SizeVec *prometheus.GaugeVec
-	GetVec  *prometheus.CounterVec
-	AddVec  *prometheus.CounterVec
+	CacheSizeVec *prometheus.GaugeVec
+	CacheGetVec  *prometheus.CounterVec
+	CacheAddVec  *prometheus.CounterVec
+
+	DBEntryCountVec        *prometheus.GaugeVec
+	DBSearchEntriesReadVec *prometheus.HistogramVec
 
 	info prometheus.GaugeVec
 	up   prometheus.Gauge
@@ -71,32 +77,48 @@ func NewMetrics(procName string) *Metrics {
 			Help:      "1 if the op-supervisor has finished starting up",
 		}),
 
-		SizeVec: factory.NewGaugeVec(prometheus.GaugeOpts{
+		CacheSizeVec: factory.NewGaugeVec(prometheus.GaugeOpts{
 			Namespace: ns,
 			Name:      "source_rpc_cache_size",
-			Help:      "source rpc cache cache size",
+			Help:      "Source rpc cache cache size",
 		}, []string{
 			"chain",
 			"type",
 		}),
-		GetVec: factory.NewCounterVec(prometheus.CounterOpts{
+		CacheGetVec: factory.NewCounterVec(prometheus.CounterOpts{
 			Namespace: ns,
 			Name:      "source_rpc_cache_get",
-			Help:      "source rpc cache lookups, hitting or not",
+			Help:      "Source rpc cache lookups, hitting or not",
 		}, []string{
 			"chain",
 			"type",
 			"hit",
 		}),
-		AddVec: factory.NewCounterVec(prometheus.CounterOpts{
+		CacheAddVec: factory.NewCounterVec(prometheus.CounterOpts{
 			Namespace: ns,
 			Name:      "source_rpc_cache_add",
-			Help:      "source rpc cache additions, evicting previous values or not",
+			Help:      "Source rpc cache additions, evicting previous values or not",
 		}, []string{
 			"chain",
 			"type",
 			"evicted",
 		}),
+
+		DBEntryCountVec: factory.NewGaugeVec(prometheus.GaugeOpts{
+			Namespace: ns,
+			Name:      "logdb_entries_current",
+			Help:      "Current number of entries in the log database by chain ID",
+		}, []string{
+			"chain",
+		}),
+		DBSearchEntriesReadVec: factory.NewHistogramVec(prometheus.HistogramOpts{
+			Namespace: ns,
+			Name:      "logdb_search_entries_read",
+			Help:      "Entries read per search of the log database",
+			Buckets:   []float64{1, 2, 5, 10, 100, 200, 256},
+		}, []string{
+			"chain",
+		}),
 	}
 }
 
@@ -120,20 +142,32 @@ func (m *Metrics) RecordUp() {
 }
 
 func (m *Metrics) CacheAdd(chainID *big.Int, label string, cacheSize int, evicted bool) {
-	chain := chainID.String()
-	m.SizeVec.WithLabelValues(chain, label).Set(float64(cacheSize))
+	chain := chainIDLabel(chainID)
+	m.CacheSizeVec.WithLabelValues(chain, label).Set(float64(cacheSize))
 	if evicted {
-		m.AddVec.WithLabelValues(chain, label, "true").Inc()
+		m.CacheAddVec.WithLabelValues(chain, label, "true").Inc()
 	} else {
-		m.AddVec.WithLabelValues(chain, label, "false").Inc()
+		m.CacheAddVec.WithLabelValues(chain, label, "false").Inc()
 	}
 }
 
 func (m *Metrics) CacheGet(chainID *big.Int, label string, hit bool) {
-	chain := chainID.String()
+	chain := chainIDLabel(chainID)
 	if hit {
-		m.GetVec.WithLabelValues(chain, label, "true").Inc()
+		m.CacheGetVec.WithLabelValues(chain, label, "true").Inc()
 	} else {
-		m.GetVec.WithLabelValues(chain, label, "false").Inc()
+		m.CacheGetVec.WithLabelValues(chain, label, "false").Inc()
 	}
 }
+
+func (m *Metrics) RecordDBEntryCount(chainID *big.Int, count int64) {
+	m.DBEntryCountVec.WithLabelValues(chainIDLabel(chainID)).Set(float64(count))
+}
+
+func (m *Metrics) RecordDBSearchEntriesRead(chainID *big.Int, count int64) {
+	m.DBSearchEntriesReadVec.WithLabelValues(chainIDLabel(chainID)).Observe(float64(count))
+}
+
+func chainIDLabel(chainID *big.Int) string {
+	return chainID.Text(10)
+}

op-supervisor/metrics/noop.go

@@ -19,3 +19,6 @@ func (*noopMetrics) RecordUp()                 {}
 
 func (m *noopMetrics) CacheAdd(_ *big.Int, _ string, _ int, _ bool) {}
 func (m *noopMetrics) CacheGet(_ *big.Int, _ string, _ bool)        {}
+
+func (m *noopMetrics) RecordDBEntryCount(_ *big.Int, _ int64)        {}
+func (m *noopMetrics) RecordDBSearchEntriesRead(_ *big.Int, _ int64) {}

op-supervisor/supervisor/backend/backend.go

@@ -5,30 +5,28 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"math/big"
 	"sync/atomic"
+	"time"
 
+	"github.com/ethereum-optimism/optimism/op-service/client"
+	"github.com/ethereum-optimism/optimism/op-service/dial"
 	"github.com/ethereum-optimism/optimism/op-supervisor/config"
+	"github.com/ethereum-optimism/optimism/op-supervisor/supervisor/backend/db"
 	"github.com/ethereum-optimism/optimism/op-supervisor/supervisor/backend/source"
+	"github.com/ethereum-optimism/optimism/op-supervisor/supervisor/frontend"
+	"github.com/ethereum-optimism/optimism/op-supervisor/supervisor/types"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/log"
-
-	"github.com/ethereum-optimism/optimism/op-supervisor/supervisor/frontend"
-	"github.com/ethereum-optimism/optimism/op-supervisor/supervisor/types"
 )
 
-type Metrics interface {
-	source.Metrics
-}
-
 type SupervisorBackend struct {
 	started atomic.Bool
 	logger  log.Logger
 
 	chainMonitors []*source.ChainMonitor
-
-	// TODO(protocol-quest#287): collection of logdbs per chain
-	// TODO(protocol-quest#288): collection of logdb updating services per chain
+	logDBs        []*db.DB
 }
 
 var _ frontend.Backend = (*SupervisorBackend)(nil)
@@ -37,8 +35,23 @@ var _ io.Closer = (*SupervisorBackend)(nil)
 
 func NewSupervisorBackend(ctx context.Context, logger log.Logger, m Metrics, cfg *config.Config) (*SupervisorBackend, error) {
 	chainMonitors := make([]*source.ChainMonitor, len(cfg.L2RPCs))
+	logDBs := make([]*db.DB, len(cfg.L2RPCs))
 	for i, rpc := range cfg.L2RPCs {
-		monitor, err := source.NewChainMonitor(ctx, logger, m, rpc)
+		rpcClient, chainID, err := createRpcClient(ctx, logger, rpc)
+		if err != nil {
+			return nil, err
+		}
+		cm := newChainMetrics(chainID, m)
+		path, err := prepLogDBPath(chainID, cfg.Datadir)
+		if err != nil {
+			return nil, fmt.Errorf("failed to create datadir for chain %v: %w", chainID, err)
+		}
+		logDB, err := db.NewFromFile(logger, cm, path)
+		if err != nil {
+			return nil, fmt.Errorf("failed to create logdb for chain %v at %v: %w", chainID, path, err)
+		}
+		logDBs[i] = logDB
+		monitor, err := source.NewChainMonitor(ctx, logger, cm, chainID, rpc, rpcClient)
 		if err != nil {
 			return nil, fmt.Errorf("failed to create monitor for rpc %v: %w", rpc, err)
 		}
@@ -47,14 +60,26 @@ func NewSupervisorBackend(ctx context.Context, logger log.Logger, m Metrics, cfg
 	return &SupervisorBackend{
 		logger:        logger,
 		chainMonitors: chainMonitors,
+		logDBs:        logDBs,
 	}, nil
 }
 
+func createRpcClient(ctx context.Context, logger log.Logger, rpc string) (client.RPC, *big.Int, error) {
+	ethClient, err := dial.DialEthClientWithTimeout(ctx, 10*time.Second, logger, rpc)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to connect to rpc %v: %w", rpc, err)
+	}
+	chainID, err := ethClient.ChainID(ctx)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to load chain id for rpc %v: %w", rpc, err)
+	}
+	return client.NewBaseRPCClient(ethClient.Client()), chainID, nil
+}
+
 func (su *SupervisorBackend) Start(ctx context.Context) error {
 	if !su.started.CompareAndSwap(false, true) {
 		return errors.New("already started")
 	}
-	// TODO(protocol-quest#288): start logdb updating services of all chains
 	for _, monitor := range su.chainMonitors {
 		if err := monitor.Start(); err != nil {
 			return fmt.Errorf("failed to start chain monitor: %w", err)
@@ -67,13 +92,17 @@ func (su *SupervisorBackend) Stop(ctx context.Context) error {
 	if !su.started.CompareAndSwap(true, false) {
 		return errors.New("already stopped")
 	}
-	// TODO(protocol-quest#288): stop logdb updating services of all chains
 	var errs error
 	for _, monitor := range su.chainMonitors {
 		if err := monitor.Stop(); err != nil {
 			errs = errors.Join(errs, fmt.Errorf("failed to stop chain monitor: %w", err))
 		}
 	}
+	for _, logDB := range su.logDBs {
+		if err := logDB.Close(); err != nil {
+			errs = errors.Join(errs, fmt.Errorf("failed to close logdb: %w", err))
+		}
+	}
 	return errs
 }
 

op-supervisor/supervisor/backend/source/chain_metrics.go → op-supervisor/supervisor/backend/chain_metrics.go

@@ -1,11 +1,20 @@
-package source
+package backend
 
 import (
 	"math/big"
 
 	"github.com/ethereum-optimism/optimism/op-service/sources/caching"
+	"github.com/ethereum-optimism/optimism/op-supervisor/supervisor/backend/db"
 )
 
+type Metrics interface {
+	CacheAdd(chainID *big.Int, label string, cacheSize int, evicted bool)
+	CacheGet(chainID *big.Int, label string, hit bool)
+
+	RecordDBEntryCount(chainID *big.Int, count int64)
+	RecordDBSearchEntriesRead(chainID *big.Int, count int64)
+}
+
 // chainMetrics is an adapter between the metrics API expected by clients that assume there's only a single chain
 // and the actual metrics implementation which requires a chain ID to identify the source chain.
 type chainMetrics struct {
@@ -28,4 +37,13 @@ func (c *chainMetrics) CacheGet(label string, hit bool) {
 	c.delegate.CacheGet(c.chainID, label, hit)
 }
 
+func (c *chainMetrics) RecordDBEntryCount(count int64) {
+	c.delegate.RecordDBEntryCount(c.chainID, count)
+}
+
+func (c *chainMetrics) RecordDBSearchEntriesRead(count int64) {
+	c.delegate.RecordDBSearchEntriesRead(c.chainID, count)
+}
+
 var _ caching.Metrics = (*chainMetrics)(nil)
+var _ db.Metrics = (*chainMetrics)(nil)

op-supervisor/supervisor/backend/db/db.go

@@ -28,8 +28,8 @@ const (
 )
 
 type Metrics interface {
-	RecordEntryCount(count int64)
-	RecordSearchEntriesRead(count int64)
+	RecordDBEntryCount(count int64)
+	RecordDBSearchEntriesRead(count int64)
 }
 
 type logContext struct {
@@ -166,7 +166,7 @@ func (db *DB) trimInvalidTrailingEntries() error {
 }
 
 func (db *DB) updateEntryCountMetric() {
-	db.m.RecordEntryCount(db.lastEntryIdx() + 1)
+	db.m.RecordDBEntryCount(db.lastEntryIdx() + 1)
 }
 
 // ClosestBlockInfo returns the block number and hash of the highest recorded block at or before blockNum.
@@ -244,7 +244,7 @@ func (db *DB) findLogInfo(blockNum uint64, logIdx uint32) (TruncatedHash, *itera
 	}
 	db.log.Trace("Starting search", "entry", entryIdx, "blockNum", i.current.blockNum, "logIdx", i.current.logIdx)
 	defer func() {
-		db.m.RecordSearchEntriesRead(i.entriesRead)
+		db.m.RecordDBSearchEntriesRead(i.entriesRead)
 	}()
 	for {
 		evtBlockNum, evtLogIdx, evtHash, err := i.NextLog()

op-supervisor/supervisor/backend/db/db_test.go

@@ -881,11 +881,11 @@ type stubMetrics struct {
 	entriesReadForSearch int64
 }
 
-func (s *stubMetrics) RecordEntryCount(count int64) {
+func (s *stubMetrics) RecordDBEntryCount(count int64) {
 	s.entryCount = count
 }
 
-func (s *stubMetrics) RecordSearchEntriesRead(count int64) {
+func (s *stubMetrics) RecordDBSearchEntriesRead(count int64) {
 	s.entriesReadForSearch = count
 }
 

op-supervisor/supervisor/backend/file_layout.go

@@ -0,0 +1,24 @@
+package backend
+
+import (
+	"fmt"
+	"math/big"
+	"os"
+	"path/filepath"
+)
+
+func prepLogDBPath(chainID *big.Int, datadir string) (string, error) {
+	dir, err := prepChainDir(chainID, datadir)
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(dir, "log.db"), nil
+}
+
+func prepChainDir(chainID *big.Int, datadir string) (string, error) {
+	dir := filepath.Join(datadir, chainID.Text(10))
+	if err := os.MkdirAll(dir, 0755); err != nil {
+		return "", fmt.Errorf("failed to create chain directory %v: %w", dir, err)
+	}
+	return dir, nil
+}

op-supervisor/supervisor/backend/file_layout_test.go

@@ -0,0 +1,28 @@
+package backend
+
+import (
+	"math/big"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestLogDBPath(t *testing.T) {
+	base := t.TempDir()
+	chainIDStr := "42984928492928428424243444"
+	chainID, ok := new(big.Int).SetString(chainIDStr, 10)
+	require.True(t, ok)
+	expected := filepath.Join(base, "subdir", chainIDStr, "log.db")
+	path, err := prepLogDBPath(chainID, filepath.Join(base, "subdir"))
+	require.NoError(t, err)
+	require.Equal(t, expected, path)
+
+	// Check it still works when directories exist
+	require.NoError(t, os.WriteFile(path, []byte("test"), 0o644))
+
+	path, err = prepLogDBPath(chainID, filepath.Join(base, "subdir"))
+	require.NoError(t, err)
+	require.Equal(t, expected, path)
+}