miner/stress: initialize account backends explicitly (#23699)

node.Node no longer registers any account manager backends by default,
they need to be registered explicitly.

For ethash-based tests, we actually don't need any accounts in the miner
keystore. Just set the etherbase instead to make mining work. For
clique, the signer account must be in the keystore.

The change also adds interrupt handling in stress tests.

miner/stress/ethash/main.go

@@ -23,10 +23,9 @@ import (
 	"math/big"
 	"math/rand"
 	"os"
-	"path/filepath"
+	"os/signal"
 	"time"
 
-	"github.com/ethereum/go-ethereum/accounts/keystore"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/fdlimit"
 	"github.com/ethereum/go-ethereum/consensus/ethash"
@@ -54,12 +53,17 @@ func main() {
 		faucets[i], _ = crypto.GenerateKey()
 	}
 	// Pre-generate the ethash mining DAG so we don't race
-	ethash.MakeDataset(1, filepath.Join(os.Getenv("HOME"), ".ethash"))
+	ethash.MakeDataset(1, ethconfig.Defaults.Ethash.DatasetDir)
 
 	// Create an Ethash network based off of the Ropsten config
 	genesis := makeGenesis(faucets)
 
+	// Handle interrupts.
+	interruptCh := make(chan os.Signal, 5)
+	signal.Notify(interruptCh, os.Interrupt)
+
 	var (
+		stacks []*node.Node
 		nodes  []*eth.Ethereum
 		enodes []*enode.Node
 	)
@@ -79,14 +83,9 @@ func main() {
 			stack.Server().AddPeer(n)
 		}
 		// Start tracking the node and its enode
+		stacks = append(stacks, stack)
 		nodes = append(nodes, ethBackend)
 		enodes = append(enodes, stack.Server().Self())
-
-		// Inject the signer key and start sealing with it
-		store := stack.AccountManager().Backends(keystore.KeyStoreType)[0].(*keystore.KeyStore)
-		if _, err := store.NewAccount(""); err != nil {
-			panic(err)
-		}
 	}
 
 	// Iterate over all the nodes and start mining
@@ -101,6 +100,16 @@ func main() {
 	// Start injecting transactions from the faucets like crazy
 	nonces := make([]uint64, len(faucets))
 	for {
+		// Stop when interrupted.
+		select {
+		case <-interruptCh:
+			for _, node := range stacks {
+				node.Close()
+			}
+			return
+		default:
+		}
+
 		// Pick a random mining node
 		index := rand.Intn(len(faucets))
 		backend := nodes[index%len(nodes)]
@@ -171,9 +180,10 @@ func makeMiner(genesis *core.Genesis) (*node.Node, *eth.Ethereum, error) {
 		GPO:             ethconfig.Defaults.GPO,
 		Ethash:          ethconfig.Defaults.Ethash,
 		Miner: miner.Config{
-			GasCeil:  genesis.GasLimit * 11 / 10,
-			GasPrice: big.NewInt(1),
-			Recommit: time.Second,
+			Etherbase: common.Address{1},
+			GasCeil:   genesis.GasLimit * 11 / 10,
+			GasPrice:  big.NewInt(1),
+			Recommit:  time.Second,
 		},
 	})
 	if err != nil {