Feature: reuse dns resolver cache when hot reload

2020-08-31 00:32:18 +08:00
parent b8ed738238
commit a32ee13fc9
4 changed files with 48 additions and 0 deletions
--- a/dns/resolver.go
+++ b/dns/resolver.go
@ -186,6 +186,11 @@ func (r *Resolver) IsFakeIP(ip net.IP) bool {
 	return false
 }

+// PatchCache overwrite lruCache to the new resolver
+func (r *Resolver) PatchCache(n *Resolver) {
+	r.lruCache.CloneTo(n.lruCache)
+}
+
 func (r *Resolver) batchExchange(clients []dnsClient, m *D.Msg) (msg *D.Msg, err error) {
 	fast, ctx := picker.WithTimeout(context.Background(), time.Second*5)
 	for _, client := range clients {