Oracle doc fix (add "key:" to secret)

Dockerfile

@@ -23,7 +23,7 @@ RUN make build
 
 # final image
 FROM registry.opensource.zalan.do/stups/alpine:latest
-MAINTAINER Team Teapot @ Zalando SE <team-teapot@zalando.de>
+LABEL maintainer="Team Teapot @ Zalando SE <team-teapot@zalando.de>"
 
 COPY --from=builder /go/src/github.com/kubernetes-incubator/external-dns/build/external-dns /bin/external-dns
 

docs/tutorials/oracle.md

@@ -22,6 +22,7 @@ auth:
   region: us-phoenix-1
   tenancy: ocid1.tenancy.oc1...
   user: ocid1.user.oc1...
+  key: |
     -----BEGIN RSA PRIVATE KEY-----
     -----END RSA PRIVATE KEY-----
   fingerprint: af:81:71:8e...

provider/domain_filter.go

@@ -46,8 +46,17 @@ func (df DomainFilter) Match(domain string) bool {
 	}
 
 	for _, filter := range df.filters {
+		strippedDomain := strings.TrimSuffix(domain, ".")
 
-		if strings.HasSuffix(strings.TrimSuffix(domain, "."), filter) {
+		if filter == "" {
+			return true
+		} else if strings.HasPrefix(filter, ".") && strings.HasSuffix(strippedDomain, filter) {
+			return true
+		} else if strings.Count(strippedDomain, ".") == strings.Count(filter, ".") {
+			if strippedDomain == filter {
+				return true
+			}
+		} else if strings.HasSuffix(strippedDomain, "."+filter) {
 			return true
 		}
 	}

provider/domain_filter_test.go

@@ -99,6 +99,36 @@ var domainFilterTests = []domainFilterTest{
 		[]string{"foo.bar.sub.example.org"},
 		true,
 	},
+	{
+		[]string{"example.org"},
+		[]string{"anexample.org", "test.anexample.org"},
+		false,
+	},
+	{
+		[]string{".example.org"},
+		[]string{"anexample.org", "test.anexample.org"},
+		false,
+	},
+	{
+		[]string{".example.org"},
+		[]string{"example.org"},
+		false,
+	},
+	{
+		[]string{".example.org"},
+		[]string{"test.example.org"},
+		true,
+	},
+	{
+		[]string{"anexample.org"},
+		[]string{"example.org", "test.example.org"},
+		false,
+	},
+	{
+		[]string{".org"},
+		[]string{"example.org", "test.example.org", "foo.test.example.org"},
+		true,
+	},
 }
 
 func TestDomainFilterMatch(t *testing.T) {