add tls option for sync etcd plugin (#2440)

plugins/sync/etcd/etcd.go

@@ -165,6 +165,7 @@ func NewSync(opts ...sync.Option) sync.Sync {
 	// TODO: parse addresses
 	c, err := clientv3.New(clientv3.Config{
 		Endpoints: endpoints,
+		TLS:       options.TLSConfig,
 	})
 	if err != nil {
 		log.Fatal(err)

sync/options.go

@@ -1,6 +1,7 @@
 package sync
 
 import (
+	"crypto/tls"
 	"time"
 )
 
@@ -31,3 +32,10 @@ func LockWait(t time.Duration) LockOption {
 		o.Wait = t
 	}
 }
+
+// WithTLS sets the TLS config
+func WithTLS(t *tls.Config) Option {
+	return func(o *Options) {
+		o.TLSConfig = t
+	}
+}

sync/sync.go

@@ -2,6 +2,7 @@
 package sync
 
 import (
+	"crypto/tls"
 	"errors"
 	"time"
 )
@@ -37,6 +38,7 @@ type Leader interface {
 type Options struct {
 	Nodes     []string
 	Prefix    string
+	TLSConfig *tls.Config
 }
 
 type Option func(o *Options)