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dns resolver: create rand seed at init time (#2007)

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lyuxuan 2018-04-26 15:10:23 -07:00 committed by GitHub
parent 66090d990b
commit 07709e8a3d
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 5 additions and 4 deletions
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9
resolver/dns/dns_resolver.go
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@ -50,7 +50,10 @@ const (
txtAttribute = "grpc_config=" txtAttribute = "grpc_config="
) )
var errMissingAddr = errors.New("missing address") var (
errMissingAddr = errors.New("missing address")
randomGen = rand.New(rand.NewSource(time.Now().UnixNano()))
)
// NewBuilder creates a dnsBuilder which is used to factory DNS resolvers. // NewBuilder creates a dnsBuilder which is used to factory DNS resolvers.
func NewBuilder() resolver.Builder { func NewBuilder() resolver.Builder {
@ -338,9 +341,7 @@ func chosenByPercentage(a *int) bool {
if a == nil { if a == nil {
return true return true
} }
s := rand.NewSource(time.Now().UnixNano()) return randomGen.Intn(100)+1 <= *a
r := rand.New(s)
return r.Intn(100)+1 <= *a
} }
func canaryingSC(js string) string { func canaryingSC(js string) string {