mirror of
https://github.com/kubernetes-sigs/external-dns.git
synced 2025-08-06 09:36:58 +02:00
323 lines
9.9 KiB
Go
323 lines
9.9 KiB
Go
/*
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Copyright 2025 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package source
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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v1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/client-go/kubernetes/fake"
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"sigs.k8s.io/external-dns/endpoint"
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)
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func TestNodeSourceNewNodeSourceWithFqdn(t *testing.T) {
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for _, tt := range []struct {
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title string
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annotationFilter string
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fqdnTemplate string
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expectError bool
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}{
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{
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title: "invalid template",
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expectError: true,
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fqdnTemplate: "{{.Name",
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},
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{
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title: "valid empty template",
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expectError: false,
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},
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{
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title: "valid template",
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expectError: false,
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fqdnTemplate: "{{.Name}}-{{.Namespace}}.ext-dns.test.com",
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},
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{
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title: "complex template",
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expectError: false,
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fqdnTemplate: "{{range .Status.Addresses}}{{if and (eq .Type \"ExternalIP\") (isIPv4 .Address)}}{{.Address | replace \".\" \"-\"}}{{break}}{{end}}{{end}}.ext-dns.test.com",
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},
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} {
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t.Run(tt.title, func(t *testing.T) {
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_, err := NewNodeSource(
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t.Context(),
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fake.NewClientset(),
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tt.annotationFilter,
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tt.fqdnTemplate,
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labels.Everything(),
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true,
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true,
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)
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if tt.expectError {
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assert.Error(t, err)
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} else {
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assert.NoError(t, err)
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}
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})
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}
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}
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func TestNodeSourceFqdnTemplatingExamples(t *testing.T) {
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for _, tt := range []struct {
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title string
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nodes []*v1.Node
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fqdnTemplate string
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expected []*endpoint.Endpoint
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}{
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{
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title: "templating expansion with multiple domains",
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nodes: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "ip-10-1-176-5.internal",
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},
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Status: v1.NodeStatus{
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Addresses: []v1.NodeAddress{
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{Type: v1.NodeInternalIP, Address: "10.1.176.1"},
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{Type: v1.NodeInternalIP, Address: "fc00:f853:ccd:e793::1"},
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},
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},
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},
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},
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fqdnTemplate: "{{.Name}}.domainA.com,{{.Name}}.domainB.com",
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expected: []*endpoint.Endpoint{
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{DNSName: "ip-10-1-176-5.internal.domainA.com", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"10.1.176.1"}},
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{DNSName: "ip-10-1-176-5.internal.domainA.com", RecordType: endpoint.RecordTypeAAAA, Targets: endpoint.Targets{"fc00:f853:ccd:e793::1"}},
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{DNSName: "ip-10-1-176-5.internal.domainB.com", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"10.1.176.1"}},
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{DNSName: "ip-10-1-176-5.internal.domainB.com", RecordType: endpoint.RecordTypeAAAA, Targets: endpoint.Targets{"fc00:f853:ccd:e793::1"}},
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},
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},
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{
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title: "templating contains namespace when node namespace is not a valid variable",
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nodes: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node-name",
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},
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Status: v1.NodeStatus{
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Addresses: []v1.NodeAddress{
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{Type: v1.NodeInternalIP, Address: "10.1.176.1"},
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},
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},
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},
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},
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fqdnTemplate: "{{.Name}}.domainA.com,{{ .Name }}.{{ .Namespace }}.example.tld",
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expected: []*endpoint.Endpoint{
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{DNSName: "node-name.domainA.com", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"10.1.176.1"}},
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{DNSName: "node-name..example.tld", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"10.1.176.1"}},
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},
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},
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{
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title: "templating with external IP and range of addresses",
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nodes: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "ip-10-1-176-1",
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},
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Status: v1.NodeStatus{
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Addresses: []v1.NodeAddress{
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{Type: v1.NodeExternalIP, Address: "243.186.136.160"},
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{Type: v1.NodeInternalIP, Address: "fc00:f853:ccd:e793::1"},
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},
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},
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},
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},
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fqdnTemplate: "{{ range .Status.Addresses }}{{if and (eq .Type \"ExternalIP\") (isIPv4 .Address)}}ip-{{ .Address | replace \".\" \"-\" }}{{ break }}{{ end }}{{ end }}.example.com",
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expected: []*endpoint.Endpoint{
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{DNSName: "ip-243-186-136-160.example.com", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"243.186.136.160"}},
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{DNSName: "ip-243-186-136-160.example.com", RecordType: endpoint.RecordTypeAAAA, Targets: endpoint.Targets{"fc00:f853:ccd:e793::1"}},
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},
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},
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{
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title: "templating with name definition and ipv4 check",
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nodes: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node-name-ip",
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},
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Status: v1.NodeStatus{
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Addresses: []v1.NodeAddress{
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{Type: v1.NodeExternalIP, Address: "243.186.136.160"},
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{Type: v1.NodeInternalIP, Address: "fc00:f853:ccd:e793::1"},
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},
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},
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},
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},
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fqdnTemplate: "{{ $name := .Name }}{{ range .Status.Addresses }}{{if (isIPv4 .Address)}}{{ $name }}.ipv4{{ break }}{{ end }}{{ end }}.example.com",
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expected: []*endpoint.Endpoint{
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{DNSName: "node-name-ip.ipv4.example.com", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"243.186.136.160"}},
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{DNSName: "node-name-ip.ipv4.example.com", RecordType: endpoint.RecordTypeAAAA, Targets: endpoint.Targets{"fc00:f853:ccd:e793::1"}},
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},
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},
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{
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title: "templating with hostname annotation",
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nodes: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "ip-10-1-176-1",
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Annotations: map[string]string{
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"external-dns.alpha.kubernetes.io/hostname": "ip-10-1-176-1.internal.domain.com",
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},
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},
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Status: v1.NodeStatus{
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Addresses: []v1.NodeAddress{
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{Type: v1.NodeExternalIP, Address: "243.186.136.160"},
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{Type: v1.NodeInternalIP, Address: "fc00:f853:ccd:e793::1"},
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},
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},
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},
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},
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fqdnTemplate: "{{.Name}}.example.com",
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expected: []*endpoint.Endpoint{
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{DNSName: "ip-10-1-176-1.example.com", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"243.186.136.160"}},
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{DNSName: "ip-10-1-176-1.example.com", RecordType: endpoint.RecordTypeAAAA, Targets: endpoint.Targets{"fc00:f853:ccd:e793::1"}},
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},
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},
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{
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title: "templating when target annotation and no external IP",
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nodes: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node-name",
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Labels: nil,
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Annotations: map[string]string{
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"external-dns.alpha.kubernetes.io/target": "203.2.45.22",
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},
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},
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Status: v1.NodeStatus{
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Addresses: []v1.NodeAddress{
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{Type: v1.NodeExternalIP, Address: "243.186.136.160"},
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{Type: v1.NodeInternalIP, Address: "fc00:f853:ccd:e793::1"},
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},
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},
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},
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},
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fqdnTemplate: "{{.Name}}.example.com",
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expected: []*endpoint.Endpoint{
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{DNSName: "node-name.example.com", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"203.2.45.22"}},
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},
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},
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{
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title: "templating with simple annotation expansion",
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nodes: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node-name",
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Annotations: map[string]string{
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"workload": "cluster-resources",
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},
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},
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Status: v1.NodeStatus{
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Addresses: []v1.NodeAddress{
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{Type: v1.NodeExternalIP, Address: "243.186.136.160"},
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},
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},
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},
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},
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fqdnTemplate: "{{ .Name }}.{{ .Annotations.workload }}.domain.tld",
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expected: []*endpoint.Endpoint{
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{DNSName: "node-name.cluster-resources.domain.tld", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"243.186.136.160"}},
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},
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},
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{
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title: "templating with complex labels expansion",
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nodes: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node-name",
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Labels: map[string]string{
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"topology.kubernetes.io/region": "eu-west-1",
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},
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Annotations: nil,
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},
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Spec: v1.NodeSpec{
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Unschedulable: false,
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},
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Status: v1.NodeStatus{
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Addresses: []v1.NodeAddress{
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{Type: v1.NodeExternalIP, Address: "243.186.136.160"},
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},
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},
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},
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},
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fqdnTemplate: "{{ .Name }}.{{ index .ObjectMeta.Labels \"topology.kubernetes.io/region\" }}.domain.tld",
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expected: []*endpoint.Endpoint{
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{DNSName: "node-name.eu-west-1.domain.tld", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"243.186.136.160"}},
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},
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},
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{
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title: "templating with shared all domain",
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nodes: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node-name-1",
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},
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Status: v1.NodeStatus{
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Addresses: []v1.NodeAddress{
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{Type: v1.NodeExternalIP, Address: "243.186.136.160"},
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},
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},
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},
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node-name-2",
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},
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Status: v1.NodeStatus{
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Addresses: []v1.NodeAddress{
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{Type: v1.NodeExternalIP, Address: "243.186.136.178"},
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},
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},
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},
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},
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fqdnTemplate: "{{ .Name }}.domain.tld,all.example.com",
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expected: []*endpoint.Endpoint{
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{DNSName: "all.example.com", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"243.186.136.160", "243.186.136.178"}},
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{DNSName: "node-name-1.domain.tld", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"243.186.136.160"}},
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{DNSName: "node-name-2.domain.tld", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"243.186.136.178"}},
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},
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},
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} {
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t.Run(tt.title, func(t *testing.T) {
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kubeClient := fake.NewClientset()
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for _, node := range tt.nodes {
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_, err := kubeClient.CoreV1().Nodes().Create(t.Context(), node, metav1.CreateOptions{})
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require.NoError(t, err)
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}
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src, err := NewNodeSource(
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t.Context(),
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kubeClient,
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"",
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tt.fqdnTemplate,
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labels.Everything(),
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true,
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true,
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)
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require.NoError(t, err)
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endpoints, err := src.Endpoints(t.Context())
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require.NoError(t, err)
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validateEndpoints(t, endpoints, tt.expected)
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})
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}
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}
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