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istio_gateway_test.go
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/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package source
import (
"context"
"testing"
"github.com/pkg/errors"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/stretchr/testify/suite"
networkingv1alpha3api "istio.io/api/networking/v1alpha3"
networkingv1alpha3 "istio.io/client-go/pkg/apis/networking/v1alpha3"
istiofake "istio.io/client-go/pkg/clientset/versioned/fake"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes/fake"
"sigs.k8s.io/external-dns/endpoint"
)
// This is a compile-time validation that gatewaySource is a Source.
var _ Source = &gatewaySource{}
type GatewaySuite struct {
suite.Suite
source Source
lbServices []*v1.Service
}
func (suite *GatewaySuite) SetupTest() {
fakeKubernetesClient := fake.NewSimpleClientset()
fakeIstioClient := istiofake.NewSimpleClientset()
var err error
suite.lbServices = []*v1.Service{
(fakeIngressGatewayService{
ips: []string{"8.8.8.8"},
hostnames: []string{"v1"},
namespace: "istio-system",
name: "istio-gateway1",
}).Service(),
(fakeIngressGatewayService{
ips: []string{"1.1.1.1"},
hostnames: []string{"v42"},
namespace: "istio-other",
name: "istio-gateway2",
}).Service(),
}
for _, service := range suite.lbServices {
_, err = fakeKubernetesClient.CoreV1().Services(service.Namespace).Create(context.Background(), service, metav1.CreateOptions{})
suite.NoError(err, "should succeed")
}
suite.source, err = NewIstioGatewaySource(
context.TODO(),
fakeKubernetesClient,
fakeIstioClient,
"",
"",
"{{.Name}}",
false,
false,
)
suite.NoError(err, "should initialize gateway source")
suite.NoError(err, "should succeed")
}
func (suite *GatewaySuite) TestResourceLabelIsSet() {
endpoints, _ := suite.source.Endpoints(context.Background())
for _, ep := range endpoints {
suite.Equal("gateway/default/foo-gateway-with-targets", ep.Labels[endpoint.ResourceLabelKey], "should set correct resource label")
}
}
func TestGateway(t *testing.T) {
t.Parallel()
suite.Run(t, new(GatewaySuite))
t.Run("endpointsFromGatewayConfig", testEndpointsFromGatewayConfig)
t.Run("Endpoints", testGatewayEndpoints)
}
func TestNewIstioGatewaySource(t *testing.T) {
t.Parallel()
for _, ti := range []struct {
title string
annotationFilter string
fqdnTemplate string
combineFQDNAndAnnotation bool
expectError bool
}{
{
title: "invalid template",
expectError: true,
fqdnTemplate: "{{.Name",
},
{
title: "valid empty template",
expectError: false,
},
{
title: "valid template",
expectError: false,
fqdnTemplate: "{{.Name}}-{{.Namespace}}.ext-dns.test.com",
},
{
title: "valid template",
expectError: false,
fqdnTemplate: "{{.Name}}-{{.Namespace}}.ext-dns.test.com, {{.Name}}-{{.Namespace}}.ext-dna.test.com",
},
{
title: "valid template",
expectError: false,
fqdnTemplate: "{{.Name}}-{{.Namespace}}.ext-dns.test.com, {{.Name}}-{{.Namespace}}.ext-dna.test.com",
combineFQDNAndAnnotation: true,
},
{
title: "non-empty annotation filter label",
expectError: false,
annotationFilter: "kubernetes.io/gateway.class=nginx",
},
} {
ti := ti
t.Run(ti.title, func(t *testing.T) {
t.Parallel()
_, err := NewIstioGatewaySource(
context.TODO(),
fake.NewSimpleClientset(),
istiofake.NewSimpleClientset(),
"",
ti.annotationFilter,
ti.fqdnTemplate,
ti.combineFQDNAndAnnotation,
false,
)
if ti.expectError {
assert.Error(t, err)
} else {
assert.NoError(t, err)
}
})
}
}
func testEndpointsFromGatewayConfig(t *testing.T) {
t.Parallel()
for _, ti := range []struct {
title string
lbServices []fakeIngressGatewayService
config fakeGatewayConfig
expected []*endpoint.Endpoint
}{
{
title: "one rule.host one lb.hostname",
lbServices: []fakeIngressGatewayService{
{
hostnames: []string{"lb.com"}, // Kubernetes omits the trailing dot
},
},
config: fakeGatewayConfig{
dnsnames: [][]string{
{"foo.bar"}, // Kubernetes requires removal of trailing dot
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "foo.bar",
Targets: endpoint.Targets{"lb.com"},
},
},
},
{
title: "one namespaced rule.host one lb.hostname",
lbServices: []fakeIngressGatewayService{
{
hostnames: []string{"lb.com"}, // Kubernetes omits the trailing dot
},
},
config: fakeGatewayConfig{
dnsnames: [][]string{
{"my-namespace/foo.bar"}, // Kubernetes requires removal of trailing dot
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "foo.bar",
Targets: endpoint.Targets{"lb.com"},
},
},
},
{
title: "one rule.host one lb.IP",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
},
},
config: fakeGatewayConfig{
dnsnames: [][]string{
{"foo.bar"},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "foo.bar",
Targets: endpoint.Targets{"8.8.8.8"},
},
},
},
{
title: "one rule.host two lb.IP and two lb.Hostname",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8", "127.0.0.1"},
hostnames: []string{"elb.com", "alb.com"},
},
},
config: fakeGatewayConfig{
dnsnames: [][]string{
{"foo.bar"},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "foo.bar",
Targets: endpoint.Targets{"8.8.8.8", "127.0.0.1"},
},
{
DNSName: "foo.bar",
Targets: endpoint.Targets{"elb.com", "alb.com"},
},
},
},
{
title: "no rule.host",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8", "127.0.0.1"},
hostnames: []string{"elb.com", "alb.com"},
},
},
config: fakeGatewayConfig{
dnsnames: [][]string{},
},
expected: []*endpoint.Endpoint{},
},
{
title: "one empty rule.host",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8", "127.0.0.1"},
hostnames: []string{"elb.com", "alb.com"},
},
},
config: fakeGatewayConfig{
dnsnames: [][]string{
{""},
},
},
expected: []*endpoint.Endpoint{},
},
{
title: "no targets",
lbServices: []fakeIngressGatewayService{{}},
config: fakeGatewayConfig{
dnsnames: [][]string{
{""},
},
},
expected: []*endpoint.Endpoint{},
},
{
title: "one gateway, two ingressgateway loadbalancer hostnames",
lbServices: []fakeIngressGatewayService{
{
hostnames: []string{"lb.com"},
namespace: "istio-other",
name: "gateway1",
},
{
hostnames: []string{"lb2.com"},
namespace: "istio-other",
name: "gateway2",
},
},
config: fakeGatewayConfig{
dnsnames: [][]string{
{"foo.bar"}, // Kubernetes requires removal of trailing dot
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "foo.bar",
Targets: endpoint.Targets{"lb.com", "lb2.com"},
},
},
},
} {
ti := ti
t.Run(ti.title, func(t *testing.T) {
t.Parallel()
gatewayCfg := ti.config.Config()
if source, err := newTestGatewaySource(ti.lbServices); err != nil {
require.NoError(t, err)
} else if hostnames, err := source.hostNamesFromGateway(gatewayCfg); err != nil {
require.NoError(t, err)
} else if endpoints, err := source.endpointsFromGateway(hostnames, gatewayCfg); err != nil {
require.NoError(t, err)
} else {
validateEndpoints(t, endpoints, ti.expected)
}
})
}
}
func testGatewayEndpoints(t *testing.T) {
t.Parallel()
for _, ti := range []struct {
title string
targetNamespace string
annotationFilter string
lbServices []fakeIngressGatewayService
configItems []fakeGatewayConfig
expected []*endpoint.Endpoint
expectError bool
fqdnTemplate string
combineFQDNAndAnnotation bool
ignoreHostnameAnnotation bool
}{
{
title: "no gateway",
targetNamespace: "",
},
{
title: "two simple gateways, one ingressgateway loadbalancer service",
targetNamespace: "",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
hostnames: []string{"lb.com"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
dnsnames: [][]string{{"example.org"}},
},
{
name: "fake2",
namespace: "",
dnsnames: [][]string{{"new.org"}},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"8.8.8.8"},
},
{
DNSName: "example.org",
Targets: endpoint.Targets{"lb.com"},
},
{
DNSName: "new.org",
Targets: endpoint.Targets{"8.8.8.8"},
},
{
DNSName: "new.org",
Targets: endpoint.Targets{"lb.com"},
},
},
},
{
title: "two simple gateways on different namespaces, one ingressgateway loadbalancer service",
targetNamespace: "",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
hostnames: []string{"lb.com"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
dnsnames: [][]string{{"example.org"}},
},
{
name: "fake2",
namespace: "",
dnsnames: [][]string{{"new.org"}},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"8.8.8.8"},
},
{
DNSName: "example.org",
Targets: endpoint.Targets{"lb.com"},
},
{
DNSName: "new.org",
Targets: endpoint.Targets{"8.8.8.8"},
},
{
DNSName: "new.org",
Targets: endpoint.Targets{"lb.com"},
},
},
},
{
title: "two simple gateways on different namespaces and a target namespace, one ingressgateway loadbalancer service",
targetNamespace: "testing1",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
hostnames: []string{"lb.com"},
namespace: "testing1",
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "testing1",
dnsnames: [][]string{{"example.org"}},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"8.8.8.8"},
},
{
DNSName: "example.org",
Targets: endpoint.Targets{"lb.com"},
},
},
},
{
title: "valid matching annotation filter expression",
targetNamespace: "",
annotationFilter: "kubernetes.io/gateway.class in (alb, nginx)",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
"kubernetes.io/gateway.class": "nginx",
},
dnsnames: [][]string{{"example.org"}},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"8.8.8.8"},
},
},
},
{
title: "valid non-matching annotation filter expression",
targetNamespace: "",
annotationFilter: "kubernetes.io/gateway.class in (alb, nginx)",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
"kubernetes.io/gateway.class": "tectonic",
},
dnsnames: [][]string{{"example.org"}},
},
},
expected: []*endpoint.Endpoint{},
},
{
title: "invalid annotation filter expression",
targetNamespace: "",
annotationFilter: "kubernetes.io/gateway.name in (a b)",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
"kubernetes.io/gateway.class": "alb",
},
dnsnames: [][]string{{"example.org"}},
},
},
expected: []*endpoint.Endpoint{},
expectError: true,
},
{
title: "valid matching annotation filter label",
targetNamespace: "",
annotationFilter: "kubernetes.io/gateway.class=nginx",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
"kubernetes.io/gateway.class": "nginx",
},
dnsnames: [][]string{{"example.org"}},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"8.8.8.8"},
},
},
},
{
title: "valid non-matching annotation filter label",
targetNamespace: "",
annotationFilter: "kubernetes.io/gateway.class=nginx",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
"kubernetes.io/gateway.class": "alb",
},
dnsnames: [][]string{{"example.org"}},
},
},
expected: []*endpoint.Endpoint{},
},
{
title: "our controller type is dns-controller",
targetNamespace: "",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
controllerAnnotationKey: controllerAnnotationValue,
},
dnsnames: [][]string{{"example.org"}},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"8.8.8.8"},
},
},
},
{
title: "different controller types are ignored",
targetNamespace: "",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
controllerAnnotationKey: "some-other-tool",
},
dnsnames: [][]string{{"example.org"}},
},
},
expected: []*endpoint.Endpoint{},
},
{
title: "template for gateway if host is missing",
targetNamespace: "",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
hostnames: []string{"elb.com"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
controllerAnnotationKey: controllerAnnotationValue,
},
dnsnames: [][]string{},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "fake1.ext-dns.test.com",
Targets: endpoint.Targets{"8.8.8.8"},
},
{
DNSName: "fake1.ext-dns.test.com",
Targets: endpoint.Targets{"elb.com"},
},
},
fqdnTemplate: "{{.Name}}.ext-dns.test.com",
},
{
title: "another controller annotation skipped even with template",
targetNamespace: "",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
controllerAnnotationKey: "other-controller",
},
dnsnames: [][]string{},
},
},
expected: []*endpoint.Endpoint{},
fqdnTemplate: "{{.Name}}.ext-dns.test.com",
},
{
title: "multiple FQDN template hostnames",
targetNamespace: "",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{},
dnsnames: [][]string{},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "fake1.ext-dns.test.com",
Targets: endpoint.Targets{"8.8.8.8"},
RecordType: endpoint.RecordTypeA,
},
{
DNSName: "fake1.ext-dna.test.com",
Targets: endpoint.Targets{"8.8.8.8"},
RecordType: endpoint.RecordTypeA,
},
},
fqdnTemplate: "{{.Name}}.ext-dns.test.com, {{.Name}}.ext-dna.test.com",
},
{
title: "multiple FQDN template hostnames",
targetNamespace: "",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{},
dnsnames: [][]string{},
},
{
name: "fake2",
namespace: "",
annotations: map[string]string{
targetAnnotationKey: "gateway-target.com",
},
dnsnames: [][]string{{"example.org"}},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "fake1.ext-dns.test.com",
Targets: endpoint.Targets{"8.8.8.8"},
RecordType: endpoint.RecordTypeA,
},
{
DNSName: "fake1.ext-dna.test.com",
Targets: endpoint.Targets{"8.8.8.8"},
RecordType: endpoint.RecordTypeA,
},
{
DNSName: "example.org",
Targets: endpoint.Targets{"gateway-target.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "fake2.ext-dns.test.com",
Targets: endpoint.Targets{"gateway-target.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "fake2.ext-dna.test.com",
Targets: endpoint.Targets{"gateway-target.com"},
RecordType: endpoint.RecordTypeCNAME,
},
},
fqdnTemplate: "{{.Name}}.ext-dns.test.com, {{.Name}}.ext-dna.test.com",
combineFQDNAndAnnotation: true,
},
{
title: "gateway rules with annotation",
targetNamespace: "",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
targetAnnotationKey: "gateway-target.com",
},
dnsnames: [][]string{{"example.org"}},
},
{
name: "fake2",
namespace: "",
annotations: map[string]string{
targetAnnotationKey: "gateway-target.com",
},
dnsnames: [][]string{{"example2.org"}},
},
{
name: "fake3",
namespace: "",
annotations: map[string]string{
targetAnnotationKey: "1.2.3.4",
},
dnsnames: [][]string{{"example3.org"}},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"gateway-target.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "example2.org",
Targets: endpoint.Targets{"gateway-target.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "example3.org",
Targets: endpoint.Targets{"1.2.3.4"},
RecordType: endpoint.RecordTypeA,
},
},
},
{
title: "gateway rules with hostname annotation",
targetNamespace: "",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"1.2.3.4"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
hostnameAnnotationKey: "dns-through-hostname.com",
},
dnsnames: [][]string{{"example.org"}},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"1.2.3.4"},
RecordType: endpoint.RecordTypeA,
},
{
DNSName: "dns-through-hostname.com",
Targets: endpoint.Targets{"1.2.3.4"},
RecordType: endpoint.RecordTypeA,
},
},
},
{
title: "gateway rules with hostname annotation having multiple hostnames",
targetNamespace: "",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"1.2.3.4"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
hostnameAnnotationKey: "dns-through-hostname.com, another-dns-through-hostname.com",
},
dnsnames: [][]string{{"example.org"}},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"1.2.3.4"},
RecordType: endpoint.RecordTypeA,
},
{
DNSName: "dns-through-hostname.com",
Targets: endpoint.Targets{"1.2.3.4"},
RecordType: endpoint.RecordTypeA,
},
{
DNSName: "another-dns-through-hostname.com",
Targets: endpoint.Targets{"1.2.3.4"},
RecordType: endpoint.RecordTypeA,
},
},
},
{
title: "gateway rules with hostname and target annotation",
targetNamespace: "",
lbServices: []fakeIngressGatewayService{
{
ips: []string{},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
hostnameAnnotationKey: "dns-through-hostname.com",
targetAnnotationKey: "gateway-target.com",
},
dnsnames: [][]string{{"example.org"}},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"gateway-target.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "dns-through-hostname.com",
Targets: endpoint.Targets{"gateway-target.com"},
RecordType: endpoint.RecordTypeCNAME,
},
},
},
{
title: "gateway rules with annotation and custom TTL",
targetNamespace: "",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
targetAnnotationKey: "gateway-target.com",
ttlAnnotationKey: "6",
},
dnsnames: [][]string{{"example.org"}},
},
{
name: "fake2",
namespace: "",
annotations: map[string]string{
targetAnnotationKey: "gateway-target.com",
ttlAnnotationKey: "1",
},
dnsnames: [][]string{{"example2.org"}},
},
{
name: "fake3",
namespace: "",
annotations: map[string]string{
targetAnnotationKey: "gateway-target.com",
ttlAnnotationKey: "10s",
},
dnsnames: [][]string{{"example3.org"}},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"gateway-target.com"},
RecordTTL: endpoint.TTL(6),
},
{
DNSName: "example2.org",
Targets: endpoint.Targets{"gateway-target.com"},
RecordTTL: endpoint.TTL(1),
},
{
DNSName: "example3.org",
Targets: endpoint.Targets{"gateway-target.com"},
RecordTTL: endpoint.TTL(10),
},
},
},
{
title: "template for gateway with annotation",
targetNamespace: "",
lbServices: []fakeIngressGatewayService{
{
ips: []string{},
hostnames: []string{},
},
},
configItems: []fakeGatewayConfig{
{
name: "fake1",
namespace: "",
annotations: map[string]string{
targetAnnotationKey: "gateway-target.com",
},
dnsnames: [][]string{},
},
{
name: "fake2",
namespace: "",
annotations: map[string]string{
targetAnnotationKey: "gateway-target.com",
},
dnsnames: [][]string{},
},
{
name: "fake3",
namespace: "",
annotations: map[string]string{
targetAnnotationKey: "1.2.3.4",
},
dnsnames: [][]string{},
},