Seed random once in main

main.go

@@ -4,9 +4,14 @@ import (
 	"fmt"
 	"os"
 
+	"github.com/hashicorp/consul/lib"
 	"github.com/mitchellh/cli"
 )
 
+func init() {
+	lib.SeedMathRand()
+}
+
 func main() {
 	os.Exit(Run(os.Args[1:]))
 }

nomad/server.go

@@ -249,11 +249,6 @@ func NewServer(config *Config) (*Server, error) {
 	// Emit metrics
 	go s.heartbeatStats()
 
-	// Seed the global random.
-	if err := seedRandom(); err != nil {
-		return nil, err
-	}
-
 	// Done
 	return s, nil
 }

nomad/util.go

@@ -2,8 +2,6 @@ package nomad
 
 import (
 	"fmt"
-	"math"
-	"math/big"
 	"math/rand"
 	"net"
 	"os"
@@ -11,8 +9,6 @@ import (
 	"runtime"
 	"strconv"
 
-	crand "crypto/rand"
-
 	"github.com/hashicorp/serf/serf"
 )
 
@@ -115,14 +111,3 @@ func maxUint64(a, b uint64) uint64 {
 	}
 	return b
 }
-
-// seedRandom seeds the global random variable using a cryptographically random
-// seed. It returns an error if determing the random seed fails.
-func seedRandom() error {
-	n, err := crand.Int(crand.Reader, big.NewInt(math.MaxInt64))
-	if err != nil {
-		return err
-	}
-	rand.Seed(n.Int64())
-	return nil
-}