🐛 fix(indexer): add retries to db connection

indexer/database/db.go

@@ -2,10 +2,13 @@
 package database
 
 import (
+	"context"
 	"fmt"
 
 	"github.com/ethereum-optimism/optimism/indexer/config"
 	_ "github.com/ethereum-optimism/optimism/indexer/database/serializers"
+	"github.com/ethereum-optimism/optimism/op-service/retry"
+	"github.com/pkg/errors"
 
 	"gorm.io/driver/postgres"
 	"gorm.io/gorm"
@@ -31,6 +34,11 @@ type DB struct {
 }
 
 func NewDB(dbConfig config.DBConfig) (*DB, error) {
+	var db *DB
+
+	retryStrategy := &retry.ExponentialStrategy{Min: 1000, Max: 20_000, MaxJitter: 250}
+
+	_, err := retry.Do[interface{}](context.Background(), 10, retryStrategy, func() (interface{}, error) {
 		dsn := fmt.Sprintf("host=%s port=%d dbname=%s sslmode=disable", dbConfig.Host, dbConfig.Port, dbConfig.Name)
 		if dbConfig.User != "" {
 			dsn += fmt.Sprintf(" user=%s", dbConfig.User)
@@ -41,17 +49,14 @@ func NewDB(dbConfig config.DBConfig) (*DB, error) {
 		gorm, err := gorm.Open(postgres.Open(dsn), &gorm.Config{
 			// The indexer will explicitly manage the transactions
 			SkipDefaultTransaction: true,
-
-		// We may choose to create an adapter such that the
-		// logger emits to the geth logger when on DEBUG mode
 			Logger:                 logger.Default.LogMode(logger.Silent),
 		})
 
 		if err != nil {
-		return nil, err
+			return nil, errors.Wrap(err, "failed to connect to database")
 		}
 
-	db := &DB{
+		db = &DB{
 			gorm:               gorm,
 			Blocks:             newBlocksDB(gorm),
 			ContractEvents:     newContractEventsDB(gorm),
@@ -59,7 +64,12 @@ func NewDB(dbConfig config.DBConfig) (*DB, error) {
 			BridgeMessages:     newBridgeMessagesDB(gorm),
 			BridgeTransactions: newBridgeTransactionsDB(gorm),
 		}
+		return nil, nil
+	})
 
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to connect to database after multiple retries")
+	}
 	return db, nil
 }