From 9976dc03943540d75c7bd1bb2b772891dee0d8bf Mon Sep 17 00:00:00 2001
From: Jan B <jan@rancher.com>
Date: Sun, 2 Apr 2017 00:21:23 +0200
Subject: [PATCH] Use less expensive health check (query zone SOA) (#69)

---
 providers/rfc2136/rfc2136.go | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/providers/rfc2136/rfc2136.go b/providers/rfc2136/rfc2136.go
index d883146..dce2246 100644
--- a/providers/rfc2136/rfc2136.go
+++ b/providers/rfc2136/rfc2136.go
@@ -76,8 +76,14 @@ func (*RFC2136Provider) GetName() string {
 }
 
 func (r *RFC2136Provider) HealthCheck() error {
-	_, err := r.GetRecords()
-	return err
+	m := new(dns.Msg)
+	m.SetQuestion(r.zoneName, dns.TypeSOA)
+	err := r.sendMessage(m)
+	if err != nil {
+		return fmt.Errorf("Failed to query zone SOA record: %v", err)
+	}
+
+	return nil
 }
 
 func (r *RFC2136Provider) AddRecord(record utils.DnsRecord) error {