prevent adding empty target when CNAME is encountered
@@ -213,6 +213,7 @@ func (d *Discovery) refreshOne(ctx context.Context, name string, ch chan<- *targ
target = hostPort(addr.AAAA.String(), d.port)
case *dns.CNAME:
// CNAME responses can occur with "Type: A" dns_sd_config requests.
+ continue
default:
level.Warn(d.logger).Log("msg", "Invalid record", "record", record)
continue
