[FAB-7544] Refactor orderer benchmark init

The performance package is used in production code, but its init
function did setup for objects and variables that are only used in
the orderer's benchmark mode. That means that when the performance
package is imported, some unneccessary initializations were being
done. This fix for [FAB-7544] moves those initializations out of the
init function, so they will only happen when they are needed. No unit
tests have been added because all of these lines of code are already
tested by the orderer's benchmark test.

Some refactoring of the benchmarkOrderer was also needed. The
initializations were moved to the beginning of the function. This was
needed because MakeNormalTx was failing as it was unable to get an
MSP-based signer. It was working before because the the init function in
the performance package had already loaded a local MSP, so when
benchmarkOrderer was doing it again later, it was actually doing
nothing.

Change-Id: I9b222e4d5468f8b6dbb676007e357e2a457b6ac6
Signed-off-by: Ben Weintraub <benweintraub34@gmail.com>

orderer/common/performance/utils.go

@@ -15,8 +15,7 @@ import (
 	"github.com/hyperledger/fabric/common/localmsp"
 	"github.com/hyperledger/fabric/common/tools/configtxgen/encoder"
 	genesisconfig "github.com/hyperledger/fabric/common/tools/configtxgen/localconfig"
-	mspmgmt "github.com/hyperledger/fabric/msp/mgmt"
-	"github.com/hyperledger/fabric/orderer/common/localconfig"
+
 	cb "github.com/hyperledger/fabric/protos/common"
 	ab "github.com/hyperledger/fabric/protos/orderer"
 	protosutils "github.com/hyperledger/fabric/protos/utils"
@@ -27,25 +26,9 @@ const (
 	Kilo = 1024 // TODO Consider adding a unit pkg
 )
 
-var conf *config.TopLevel
-
 var letterRunes = []rune("abcdefghijklmnopqrstuvwxyz")
 
-var channelProfile *genesisconfig.Profile
-
-func init() {
-	rand.Seed(time.Now().UnixNano())
-
-	conf = config.Load()
-
-	// Load local MSP
-	err := mspmgmt.LoadLocalMsp(conf.General.LocalMSPDir, conf.General.BCCSP, conf.General.LocalMSPID)
-	if err != nil {
-		panic(fmt.Errorf("Failed to initialize local MSP: %s", err))
-	}
-
-	channelProfile = genesisconfig.Load(genesisconfig.SampleSingleMSPChannelV11Profile)
-}
+var seedOnce sync.Once
 
 // MakeNormalTx creates a properly signed transaction that could be used against `broadcast` API
 func MakeNormalTx(channelID string, size int) *cb.Envelope {
@@ -94,6 +77,8 @@ func OrdererExec(f func(s *BenchmarkServer)) {
 
 // RandomID generates a random string of num chars
 func RandomID(num int) string {
+	seedOnce.Do(func() { rand.Seed(time.Now().UnixNano()) })
+
 	b := make([]rune, num)
 	for i := range b {
 		b[i] = letterRunes[rand.Intn(len(letterRunes))]
@@ -102,7 +87,7 @@ func RandomID(num int) string {
 }
 
 // CreateChannel creates a channel with randomly generated ID of length 10
-func CreateChannel(server *BenchmarkServer) string {
+func CreateChannel(server *BenchmarkServer, channelProfile *genesisconfig.Profile) string {
 	client := server.CreateBroadcastClient()
 	defer client.Close()
 

orderer/common/server/benchmark_test.go

@@ -110,6 +110,7 @@ const (
 	// be less than 13 KB.
 	AbsoluteMaxBytes  = 15 // KB
 	PreferredMaxBytes = 10 // KB
+	ChannelProfile    = localconfig.SampleSingleMSPChannelV11Profile
 )
 
 var envvars = map[string]string{
@@ -356,6 +357,15 @@ func benchmarkOrderer(
 	numOfOrderer int,
 	multiplex bool,
 ) {
+	// Initialization shared by all orderers
+	conf := config.Load()
+	initializeLoggingLevel(conf)
+	initializeLocalMsp(conf)
+	perf.InitializeServerPool(numOfOrderer)
+
+	// Load sample channel profile
+	channelProfile := localconfig.Load(ChannelProfile)
+
 	// Calculate intermediate variables used internally. See the comment at the beginning
 	// of this file for the purpose of these vars.
 	txPerClient := totalTx / (broadcastClientPerChannel * numOfChannels * numOfOrderer)
@@ -376,12 +386,6 @@ func benchmarkOrderer(
 
 	var txCount uint64 // Atomic counter to keep track of actual tx sent
 
-	// Initialization shared by all orderers
-	conf := config.Load()
-	initializeLoggingLevel(conf)
-	initializeLocalMsp(conf)
-	perf.InitializeServerPool(numOfOrderer)
-
 	// Generate a random system channel id for each test run,
 	// so it does not recover ledgers from previous run.
 	systemchannel := "system-channel-" + perf.RandomID(5)
@@ -419,7 +423,7 @@ func benchmarkOrderer(
 	channelIDs := make([]string, numOfChannels)
 	txs := make(map[string]*cb.Envelope)
 	for i := 0; i < numOfChannels; i++ {
-		id := perf.CreateChannel(benchmarkServers[0]) // We only need to create channel on one orderer
+		id := perf.CreateChannel(benchmarkServers[0], channelProfile) // We only need to create channel on one orderer
 		channelIDs[i] = id
 		txs[id] = perf.MakeNormalTx(id, msgSize)
 	}

sampleconfig/configtx.yaml

@@ -59,7 +59,7 @@ Profiles:
                     - <<: *SampleOrg
                       AdminPrincipal: Role.MEMBER
 
-    # SampleDevModeSoloV1.1 mimics the SampleDevModeKafka definition
+    # SampleDevModeSoloV1.1 mimics the SampleDevModeSolo definition
     # but additionally defines the v1.1 only capabilities which do
     # not allow a mixed v1.0.x v1.1.x network
     SampleDevModeSoloV1_1: