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external-dns/source/istio_virtualservice_test.go

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/*
Copyright 2020 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"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/pkg/errors"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/stretchr/testify/suite"
istionetworking "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"
"k8s.io/client-go/kubernetes/fake"
"sigs.k8s.io/external-dns/endpoint"
)
// This is a compile-time validation that istioVirtualServiceSource is a Source.
var _ Source = &virtualServiceSource{}
type VirtualServiceSuite struct {
suite.Suite
source Source
lbServices []*v1.Service
gwconfig networkingv1alpha3.Gateway
vsconfig networkingv1alpha3.VirtualService
}
func (suite *VirtualServiceSuite) 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-system",
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.gwconfig = (fakeGatewayConfig{
name: "foo-gateway-with-targets",
namespace: "istio-system",
dnsnames: [][]string{{"*"}},
}).Config()
_, err = fakeIstioClient.NetworkingV1alpha3().Gateways(suite.gwconfig.Namespace).Create(context.Background(), &suite.gwconfig, metav1.CreateOptions{})
suite.NoError(err, "should succeed")
suite.vsconfig = (fakeVirtualServiceConfig{
name: "foo-virtualservice",
namespace: "istio-other",
gateways: []string{"istio-system/foo-gateway-with-targets"},
dnsnames: []string{"foo"},
}).Config()
_, err = fakeIstioClient.NetworkingV1alpha3().VirtualServices(suite.vsconfig.Namespace).Create(context.Background(), &suite.vsconfig, metav1.CreateOptions{})
suite.NoError(err, "should succeed")
suite.source, err = NewIstioVirtualServiceSource(
fakeKubernetesClient,
fakeIstioClient,
"",
"",
"{{.Name}}",
false,
false,
)
suite.NoError(err, "should initialize virtualservice source")
}
func (suite *VirtualServiceSuite) TestResourceLabelIsSet() {
endpoints, err := suite.source.Endpoints(context.Background())
suite.NoError(err, "should succeed")
suite.Equal(len(endpoints), 2, "should return the correct number of endpoints")
for _, ep := range endpoints {
suite.Equal("virtualservice/istio-other/foo-virtualservice", ep.Labels[endpoint.ResourceLabelKey], "should set correct resource label")
}
}
func TestVirtualService(t *testing.T) {
t.Parallel()
suite.Run(t, new(VirtualServiceSuite))
t.Run("virtualServiceBindsToGateway", testVirtualServiceBindsToGateway)
t.Run("endpointsFromVirtualServiceConfig", testEndpointsFromVirtualServiceConfig)
t.Run("Endpoints", testVirtualServiceEndpoints)
t.Run("gatewaySelectorMatchesService", testGatewaySelectorMatchesService)
}
func TestNewIstioVirtualServiceSource(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 := NewIstioVirtualServiceSource(
fake.NewSimpleClientset(),
istiofake.NewSimpleClientset(),
"",
ti.annotationFilter,
ti.fqdnTemplate,
ti.combineFQDNAndAnnotation,
false,
)
if ti.expectError {
assert.Error(t, err)
} else {
assert.NoError(t, err)
}
})
}
}
func testVirtualServiceBindsToGateway(t *testing.T) {
for _, ti := range []struct {
title string
gwconfig fakeGatewayConfig
vsconfig fakeVirtualServiceConfig
vsHost string
expected bool
}{
{
title: "matching host *",
gwconfig: fakeGatewayConfig{
dnsnames: [][]string{{"*"}},
},
vsconfig: fakeVirtualServiceConfig{},
vsHost: "foo.bar",
expected: true,
},
{
title: "matching host *.<domain>",
gwconfig: fakeGatewayConfig{
dnsnames: [][]string{{"*.foo.bar"}},
},
vsconfig: fakeVirtualServiceConfig{},
vsHost: "baz.foo.bar",
expected: true,
},
{
title: "not matching host *.<domain>",
gwconfig: fakeGatewayConfig{
dnsnames: [][]string{{"*.foo.bar"}},
},
vsconfig: fakeVirtualServiceConfig{},
vsHost: "foo.bar",
expected: false,
},
{
title: "not matching host *.<domain>",
gwconfig: fakeGatewayConfig{
dnsnames: [][]string{{"*.foo.bar"}},
},
vsconfig: fakeVirtualServiceConfig{},
vsHost: "bazfoo.bar",
expected: false,
},
{
title: "not matching host *.<domain>",
gwconfig: fakeGatewayConfig{
dnsnames: [][]string{{"*.foo.bar"}},
},
vsconfig: fakeVirtualServiceConfig{},
vsHost: "*foo.bar",
expected: false,
},
{
title: "matching host */*",
gwconfig: fakeGatewayConfig{
dnsnames: [][]string{{"*/*"}},
},
vsconfig: fakeVirtualServiceConfig{},
vsHost: "foo.bar",
expected: true,
},
{
title: "matching host <namespace>/*",
gwconfig: fakeGatewayConfig{
namespace: "istio-system",
dnsnames: [][]string{{"myns/*"}},
},
vsconfig: fakeVirtualServiceConfig{
namespace: "myns",
},
vsHost: "foo.bar",
expected: true,
},
{
title: "matching host ./*",
gwconfig: fakeGatewayConfig{
namespace: "istio-system",
dnsnames: [][]string{{"./*"}},
},
vsconfig: fakeVirtualServiceConfig{
namespace: "istio-system",
},
vsHost: "foo.bar",
expected: true,
},
{
title: "not matching host ./*",
gwconfig: fakeGatewayConfig{
namespace: "istio-system",
dnsnames: [][]string{{"./*"}},
},
vsconfig: fakeVirtualServiceConfig{
namespace: "myns",
},
vsHost: "foo.bar",
expected: false,
},
{
title: "not matching host <namespace>/*",
gwconfig: fakeGatewayConfig{
namespace: "istio-system",
dnsnames: [][]string{{"myns/*"}},
},
vsconfig: fakeVirtualServiceConfig{
namespace: "otherns",
},
vsHost: "foo.bar",
expected: false,
},
{
title: "not matching host <namespace>/*",
gwconfig: fakeGatewayConfig{
namespace: "istio-system",
dnsnames: [][]string{{"myns/*"}},
},
vsconfig: fakeVirtualServiceConfig{
namespace: "otherns",
},
vsHost: "foo.bar",
expected: false,
},
{
title: "matching exportTo *",
gwconfig: fakeGatewayConfig{
namespace: "istio-system",
dnsnames: [][]string{{"*"}},
},
vsconfig: fakeVirtualServiceConfig{
namespace: "otherns",
exportTo: "*",
},
vsHost: "foo.bar",
expected: true,
},
{
title: "matching exportTo <namespace>",
gwconfig: fakeGatewayConfig{
namespace: "istio-system",
dnsnames: [][]string{{"*"}},
},
vsconfig: fakeVirtualServiceConfig{
namespace: "otherns",
exportTo: "istio-system",
},
vsHost: "foo.bar",
expected: true,
},
{
title: "not matching exportTo <namespace>",
gwconfig: fakeGatewayConfig{
namespace: "istio-system",
dnsnames: [][]string{{"*"}},
},
vsconfig: fakeVirtualServiceConfig{
namespace: "otherns",
exportTo: "myns",
},
vsHost: "foo.bar",
expected: false,
},
{
title: "not matching exportTo .",
gwconfig: fakeGatewayConfig{
namespace: "istio-system",
dnsnames: [][]string{{"*"}},
},
vsconfig: fakeVirtualServiceConfig{
namespace: "otherns",
exportTo: ".",
},
vsHost: "foo.bar",
expected: false,
},
} {
t.Run(ti.title, func(t *testing.T) {
vsconfig := ti.vsconfig.Config()
gwconfig := ti.gwconfig.Config()
require.Equal(t, ti.expected, virtualServiceBindsToGateway(&vsconfig, &gwconfig, ti.vsHost))
})
}
}
func testEndpointsFromVirtualServiceConfig(t *testing.T) {
t.Parallel()
for _, ti := range []struct {
title string
lbServices []fakeIngressGatewayService
gwconfig fakeGatewayConfig
vsconfig fakeVirtualServiceConfig
expected []*endpoint.Endpoint
}{
{
title: "one rule.host one lb.hostname",
lbServices: []fakeIngressGatewayService{
{
hostnames: []string{"lb.com"}, // Kubernetes omits the trailing dot
},
},
gwconfig: fakeGatewayConfig{
name: "mygw",
dnsnames: [][]string{{"*"}},
},
vsconfig: fakeVirtualServiceConfig{
gateways: []string{"mygw"},
dnsnames: []string{"foo.bar"},
},
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"},
},
},
gwconfig: fakeGatewayConfig{
name: "mygw",
dnsnames: [][]string{{"*"}},
},
vsconfig: fakeVirtualServiceConfig{
gateways: []string{"mygw"},
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"},
},
},
gwconfig: fakeGatewayConfig{
name: "mygw",
dnsnames: [][]string{{"*"}},
},
vsconfig: fakeVirtualServiceConfig{
gateways: []string{"mygw"},
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"},
},
},
gwconfig: fakeGatewayConfig{
name: "mygw",
dnsnames: [][]string{{"*"}},
},
vsconfig: fakeVirtualServiceConfig{
gateways: []string{"mygw"},
dnsnames: []string{},
},
expected: []*endpoint.Endpoint{},
},
{
title: "no rule.gateway",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8", "127.0.0.1"},
hostnames: []string{"elb.com", "alb.com"},
},
},
gwconfig: fakeGatewayConfig{
name: "mygw",
dnsnames: [][]string{{"*"}},
},
vsconfig: fakeVirtualServiceConfig{
gateways: []string{},
dnsnames: []string{"foo.bar"},
},
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"},
},
},
gwconfig: fakeGatewayConfig{
dnsnames: [][]string{
{""},
},
},
expected: []*endpoint.Endpoint{},
},
{
title: "no targets",
lbServices: []fakeIngressGatewayService{{}},
gwconfig: fakeGatewayConfig{
name: "mygw",
dnsnames: [][]string{{"*"}},
},
vsconfig: fakeVirtualServiceConfig{
gateways: []string{},
dnsnames: []string{"foo.bar"},
},
expected: []*endpoint.Endpoint{},
},
{
title: "matching selectors for service and gateway",
lbServices: []fakeIngressGatewayService{
{
name: "service1",
selector: map[string]string{
"app": "myservice",
},
hostnames: []string{"elb.com", "alb.com"},
},
{
name: "service2",
selector: map[string]string{
"app": "otherservice",
},
ips: []string{"8.8.8.8", "127.0.0.1"},
},
},
gwconfig: fakeGatewayConfig{
name: "mygw",
dnsnames: [][]string{{"*"}},
selector: map[string]string{
"app": "myservice",
},
},
vsconfig: fakeVirtualServiceConfig{
gateways: []string{"mygw"},
dnsnames: []string{"foo.bar"},
},
expected: []*endpoint.Endpoint{
{
DNSName: "foo.bar",
Targets: endpoint.Targets{"elb.com", "alb.com"},
},
},
},
} {
ti := ti
t.Run(ti.title, func(t *testing.T) {
t.Parallel()
if source, err := newTestVirtualServiceSource(ti.lbServices, []fakeGatewayConfig{ti.gwconfig}); err != nil {
require.NoError(t, err)
} else if endpoints, err := source.endpointsFromVirtualService(context.Background(), ti.vsconfig.Config()); err != nil {
require.NoError(t, err)
} else {
validateEndpoints(t, endpoints, ti.expected)
}
})
}
}
func testVirtualServiceEndpoints(t *testing.T) {
t.Parallel()
namespace := "testing"
for _, ti := range []struct {
title string
targetNamespace string
annotationFilter string
lbServices []fakeIngressGatewayService
gwConfigs []fakeGatewayConfig
vsConfigs []fakeVirtualServiceConfig
expected []*endpoint.Endpoint
expectError bool
fqdnTemplate string
combineFQDNAndAnnotation bool
ignoreHostnameAnnotation bool
}{
{
title: "two simple virtualservices with one gateway each, one ingressgateway loadbalancer service",
lbServices: []fakeIngressGatewayService{
{
namespace: namespace,
ips: []string{"8.8.8.8"},
hostnames: []string{"lb.com"},
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: namespace,
dnsnames: [][]string{{"example.org"}},
},
{
name: "fake2",
namespace: namespace,
dnsnames: [][]string{{"new.org"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
gateways: []string{"fake1"},
dnsnames: []string{"example.org"},
},
{
name: "vs2",
namespace: namespace,
gateways: []string{"fake2"},
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: "one virtualservice with two gateways, one ingressgateway loadbalancer service",
lbServices: []fakeIngressGatewayService{
{
namespace: namespace,
ips: []string{"8.8.8.8"},
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "gw1",
namespace: namespace,
dnsnames: [][]string{{"*"}},
},
{
name: "gw2",
namespace: namespace,
dnsnames: [][]string{{"*"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs",
namespace: namespace,
gateways: []string{"gw1", "gw2"},
dnsnames: []string{"example.org"},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"8.8.8.8"},
},
},
},
{
title: "two simple virtualservices on different namespaces with the same target gateway, one ingressgateway loadbalancer service",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
hostnames: []string{"lb.com"},
namespace: "istio-system",
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: "istio-system",
dnsnames: [][]string{{"*"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: "testing1",
gateways: []string{"istio-system/fake1"},
dnsnames: []string{"example.org"},
},
{
name: "vs2",
namespace: "testing2",
gateways: []string{"istio-system/fake1"},
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 virtualservices with one gateway 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",
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: "testing1",
dnsnames: [][]string{{"*"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: "testing1",
gateways: []string{"testing1/fake1"},
dnsnames: []string{"example.org"},
},
{
name: "vs2",
namespace: "testing2",
gateways: []string{"testing1/fake1"},
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"},
},
},
},
{
title: "valid matching annotation filter expression",
annotationFilter: "kubernetes.io/virtualservice.class in (alb, nginx)",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
namespace: namespace,
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: namespace,
dnsnames: [][]string{{"*"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
annotations: map[string]string{
"kubernetes.io/virtualservice.class": "nginx",
},
gateways: []string{"fake1"},
dnsnames: []string{"example.org"},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"8.8.8.8"},
},
},
},
{
title: "valid non-matching annotation filter expression",
annotationFilter: "kubernetes.io/gateway.class in (alb, nginx)",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
namespace: namespace,
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: namespace,
dnsnames: [][]string{{"*"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
annotations: map[string]string{
"kubernetes.io/virtualservice.class": "tectonic",
},
gateways: []string{"fake1"},
dnsnames: []string{"example.org"},
},
},
expected: []*endpoint.Endpoint{},
},
{
title: "invalid annotation filter expression",
annotationFilter: "kubernetes.io/gateway.name in (a b)",
expected: []*endpoint.Endpoint{},
expectError: true,
},
{
title: "our controller type is dns-controller",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
namespace: namespace,
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: namespace,
dnsnames: [][]string{{"*"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
annotations: map[string]string{
controllerAnnotationKey: controllerAnnotationValue,
},
gateways: []string{"fake1"},
dnsnames: []string{"example.org"},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"8.8.8.8"},
},
},
},
{
title: "different controller types are ignored",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
namespace: namespace,
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: namespace,
dnsnames: [][]string{{"*"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
annotations: map[string]string{
controllerAnnotationKey: "some-other-tool",
},
gateways: []string{"fake1"},
dnsnames: []string{"example.org"},
},
},
expected: []*endpoint.Endpoint{},
},
{
title: "template for virtualservice if host is missing",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
hostnames: []string{"elb.com"},
namespace: namespace,
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: namespace,
dnsnames: [][]string{{"*"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
gateways: []string{"fake1"},
dnsnames: []string{""},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "vs1.ext-dns.test.com",
Targets: endpoint.Targets{"8.8.8.8"},
},
{
DNSName: "vs1.ext-dns.test.com",
Targets: endpoint.Targets{"elb.com"},
},
},
fqdnTemplate: "{{.Name}}.ext-dns.test.com",
},
{
title: "multiple FQDN template hostnames",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
namespace: namespace,
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: namespace,
dnsnames: [][]string{{"*"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
gateways: []string{"fake1"},
dnsnames: []string{""},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "vs1.ext-dns.test.com",
Targets: endpoint.Targets{"8.8.8.8"},
RecordType: endpoint.RecordTypeA,
},
{
DNSName: "vs1.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 with restricted gw.hosts",
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: namespace,
annotations: map[string]string{
targetAnnotationKey: "gateway-target.com",
},
dnsnames: [][]string{{"*.org", "*.ext-dns.test.com"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
gateways: []string{"fake1"},
dnsnames: []string{"example.org"},
},
{
name: "vs2",
namespace: namespace,
gateways: []string{"fake1"},
dnsnames: []string{},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "vs1.ext-dns.test.com",
Targets: endpoint.Targets{"gateway-target.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "vs2.ext-dns.test.com",
Targets: endpoint.Targets{"gateway-target.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "example.org",
Targets: endpoint.Targets{"gateway-target.com"},
RecordType: endpoint.RecordTypeCNAME,
},
},
fqdnTemplate: "{{.Name}}.ext-dns.test.com, {{.Name}}.ext-dna.test.com",
combineFQDNAndAnnotation: true,
},
{
title: "virtualservice with target annotation",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
namespace: namespace,
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
gateways: []string{"fake1"},
annotations: map[string]string{
targetAnnotationKey: "virtualservice-target.com",
},
dnsnames: []string{"example.org"},
},
{
name: "vs2",
namespace: namespace,
gateways: []string{"fake1"},
annotations: map[string]string{
targetAnnotationKey: "virtualservice-target.com",
},
dnsnames: []string{"example2.org"},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"virtualservice-target.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "example2.org",
Targets: endpoint.Targets{"virtualservice-target.com"},
RecordType: endpoint.RecordTypeCNAME,
},
},
},
{
title: "virtualservice; gateway with target annotation",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
namespace: namespace,
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: namespace,
dnsnames: [][]string{{"*"}},
annotations: map[string]string{
targetAnnotationKey: "gateway-target.com",
},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
gateways: []string{"fake1"},
dnsnames: []string{"example.org"},
},
{
name: "vs2",
namespace: namespace,
gateways: []string{"fake1"},
dnsnames: []string{"example2.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,
},
},
},
{
title: "virtualservice with hostname annotation",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"1.2.3.4"},
namespace: namespace,
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: namespace,
dnsnames: [][]string{{"*"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
gateways: []string{"fake1"},
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: "virtualservice with hostname annotation having multiple hostnames, restricted by gw.hosts",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"1.2.3.4"},
namespace: namespace,
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: namespace,
dnsnames: [][]string{{"*.bar.com"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
gateways: []string{"fake1"},
annotations: map[string]string{
hostnameAnnotationKey: "foo.bar.com, another-dns-through-hostname.com",
},
dnsnames: []string{"baz.bar.org"},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "foo.bar.com",
Targets: endpoint.Targets{"1.2.3.4"},
RecordType: endpoint.RecordTypeA,
},
},
},
{
title: "virtualservices with annotation and custom TTL",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
namespace: namespace,
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: namespace,
dnsnames: [][]string{{"*"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
gateways: []string{"fake1"},
annotations: map[string]string{
ttlAnnotationKey: "6",
},
dnsnames: []string{"example.org"},
},
{
name: "vs2",
namespace: namespace,
gateways: []string{"fake1"},
annotations: map[string]string{
ttlAnnotationKey: "1",
},
dnsnames: []string{"example2.org"},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "example.org",
Targets: endpoint.Targets{"8.8.8.8"},
RecordTTL: endpoint.TTL(6),
},
{
DNSName: "example2.org",
Targets: endpoint.Targets{"8.8.8.8"},
RecordTTL: endpoint.TTL(1),
},
},
},
{
title: "template for virtualservice; gateway with target annotation",
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: namespace,
annotations: map[string]string{
targetAnnotationKey: "gateway-target.com",
},
dnsnames: [][]string{{"*"}},
},
{
name: "fake2",
namespace: namespace,
annotations: map[string]string{
targetAnnotationKey: "gateway-target.com",
},
dnsnames: [][]string{{"*"}},
},
{
name: "fake3",
namespace: namespace,
annotations: map[string]string{
targetAnnotationKey: "1.2.3.4",
},
dnsnames: [][]string{{"*"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
gateways: []string{"fake1"},
dnsnames: []string{},
},
{
name: "vs2",
namespace: namespace,
gateways: []string{"fake2"},
dnsnames: []string{},
},
{
name: "vs3",
namespace: namespace,
gateways: []string{"fake3"},
dnsnames: []string{},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "vs1.ext-dns.test.com",
Targets: endpoint.Targets{"gateway-target.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "vs2.ext-dns.test.com",
Targets: endpoint.Targets{"gateway-target.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "vs3.ext-dns.test.com",
Targets: endpoint.Targets{"1.2.3.4"},
RecordType: endpoint.RecordTypeA,
},
},
fqdnTemplate: "{{.Name}}.ext-dns.test.com",
},
{
title: "ignore hostname annotations",
lbServices: []fakeIngressGatewayService{
{
ips: []string{"8.8.8.8"},
hostnames: []string{"lb.com"},
namespace: namespace,
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: namespace,
dnsnames: [][]string{{"*"}},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: namespace,
gateways: []string{"fake1"},
annotations: map[string]string{
hostnameAnnotationKey: "ignore.me",
},
dnsnames: []string{"example.org"},
},
{
name: "vs2",
namespace: namespace,
gateways: []string{"fake1"},
annotations: map[string]string{
hostnameAnnotationKey: "ignore.me.too",
},
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"},
},
},
ignoreHostnameAnnotation: true,
},
{
title: "complex setup with multiple gateways and multiple vs.hosts only matching some of the gateway",
lbServices: []fakeIngressGatewayService{
{
name: "svc1",
selector: map[string]string{
"app": "igw1",
},
hostnames: []string{"target1.com"},
namespace: "istio-system",
},
{
name: "svc2",
selector: map[string]string{
"app": "igw2",
},
hostnames: []string{"target2.com"},
namespace: "testing1",
},
{
name: "svc3",
selector: map[string]string{
"app": "igw3",
},
hostnames: []string{"target3.com"},
namespace: "testing2",
},
},
gwConfigs: []fakeGatewayConfig{
{
name: "fake1",
namespace: "istio-system",
dnsnames: [][]string{{"*"}},
selector: map[string]string{
"app": "igw1",
},
},
{
name: "fake2",
namespace: "testing1",
dnsnames: [][]string{{"*.baz.com"}, {"*.bar.com"}},
selector: map[string]string{
"app": "igw2",
},
},
{
name: "fake3",
namespace: "testing2",
dnsnames: [][]string{{"*.bax.com", "*.bar.com"}},
selector: map[string]string{
"app": "igw3",
},
},
},
vsConfigs: []fakeVirtualServiceConfig{
{
name: "vs1",
namespace: "testing3",
gateways: []string{"istio-system/fake1", "testing1/fake2"},
dnsnames: []string{"somedomain.com", "foo.bar.com"},
},
{
name: "vs2",
namespace: "testing2",
gateways: []string{"testing1/fake2", "fake3"},
dnsnames: []string{"hello.bar.com", "hello.bax.com", "hello.bak.com"},
},
{
name: "vs3",
namespace: "testing1",
gateways: []string{"istio-system/fake1", "testing2/fake3"},
dnsnames: []string{"world.bax.com", "world.bak.com"},
},
},
expected: []*endpoint.Endpoint{
{
DNSName: "somedomain.com",
Targets: endpoint.Targets{"target1.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "foo.bar.com",
Targets: endpoint.Targets{"target1.com", "target2.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "hello.bar.com",
Targets: endpoint.Targets{"target2.com", "target3.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "hello.bax.com",
Targets: endpoint.Targets{"target3.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "world.bak.com",
Targets: endpoint.Targets{"target1.com"},
RecordType: endpoint.RecordTypeCNAME,
},
{
DNSName: "world.bax.com",
Targets: endpoint.Targets{"target1.com", "target3.com"},
RecordType: endpoint.RecordTypeCNAME,
},
},
fqdnTemplate: "{{.Name}}.ext-dns.test.com",
},
} {
ti := ti
t.Run(ti.title, func(t *testing.T) {
t.Parallel()
var gateways []networkingv1alpha3.Gateway
var virtualservices []networkingv1alpha3.VirtualService
for _, gwItem := range ti.gwConfigs {
gateways = append(gateways, gwItem.Config())
}
for _, vsItem := range ti.vsConfigs {
virtualservices = append(virtualservices, vsItem.Config())
}
fakeKubernetesClient := fake.NewSimpleClientset()
for _, lb := range ti.lbServices {
service := lb.Service()
_, err := fakeKubernetesClient.CoreV1().Services(service.Namespace).Create(context.Background(), service, metav1.CreateOptions{})
require.NoError(t, err)
}
fakeIstioClient := istiofake.NewSimpleClientset()
for _, gateway := range gateways {
_, err := fakeIstioClient.NetworkingV1alpha3().Gateways(gateway.Namespace).Create(context.Background(), &gateway, metav1.CreateOptions{})
require.NoError(t, err)
}
for _, virtualservice := range virtualservices {
_, err := fakeIstioClient.NetworkingV1alpha3().VirtualServices(virtualservice.Namespace).Create(context.Background(), &virtualservice, metav1.CreateOptions{})
require.NoError(t, err)
}
virtualServiceSource, err := NewIstioVirtualServiceSource(
fakeKubernetesClient,
fakeIstioClient,
ti.targetNamespace,
ti.annotationFilter,
ti.fqdnTemplate,
ti.combineFQDNAndAnnotation,
ti.ignoreHostnameAnnotation,
)
require.NoError(t, err)
res, err := virtualServiceSource.Endpoints(context.Background())
if ti.expectError {
assert.Error(t, err)
} else {
assert.NoError(t, err)
}
validateEndpoints(t, res, ti.expected)
})
}
}
func testGatewaySelectorMatchesService(t *testing.T) {
for _, ti := range []struct {
title string
gwSelector map[string]string
lbSelector map[string]string
expected bool
}{
{
title: "gw selector matches lb selector",
gwSelector: map[string]string{"istio": "ingressgateway"},
lbSelector: map[string]string{"istio": "ingressgateway"},
expected: true,
},
{
title: "gw selector matches lb selector partially",
gwSelector: map[string]string{"istio": "ingressgateway"},
lbSelector: map[string]string{"release": "istio", "istio": "ingressgateway"},
expected: true,
},
{
title: "gw selector does not match lb selector",
gwSelector: map[string]string{"app": "mytest"},
lbSelector: map[string]string{"istio": "ingressgateway"},
expected: false,
},
} {
t.Run(ti.title, func(t *testing.T) {
require.Equal(t, ti.expected, gatewaySelectorMatchesServiceSelector(ti.gwSelector, ti.lbSelector))
})
}
}
func newTestVirtualServiceSource(loadBalancerList []fakeIngressGatewayService, gwList []fakeGatewayConfig) (*virtualServiceSource, error) {
fakeKubernetesClient := fake.NewSimpleClientset()
fakeIstioClient := istiofake.NewSimpleClientset()
for _, lb := range loadBalancerList {
service := lb.Service()
_, err := fakeKubernetesClient.CoreV1().Services(service.Namespace).Create(context.Background(), service, metav1.CreateOptions{})
if err != nil {
return nil, err
}
}
for _, gw := range gwList {
gwObj := gw.Config()
_, err := fakeIstioClient.NetworkingV1alpha3().Gateways(gw.namespace).Create(context.Background(), &gwObj, metav1.CreateOptions{})
if err != nil {
return nil, err
}
}
src, err := NewIstioVirtualServiceSource(
fakeKubernetesClient,
fakeIstioClient,
"",
"",
"{{.Name}}",
false,
false,
)
if err != nil {
return nil, err
}
vssrc, ok := src.(*virtualServiceSource)
if !ok {
return nil, errors.New("underlying source type was not virtualservice")
}
return vssrc, nil
}
type fakeVirtualServiceConfig struct {
namespace string
name string
gateways []string
annotations map[string]string
dnsnames []string
exportTo string
}
func (c fakeVirtualServiceConfig) Config() networkingv1alpha3.VirtualService {
vs := istionetworking.VirtualService{
Gateways: c.gateways,
Hosts: c.dnsnames,
}
if c.exportTo != "" {
vs.ExportTo = []string{c.exportTo}
}
config := networkingv1alpha3.VirtualService{
ObjectMeta: metav1.ObjectMeta{
Name: c.name,
Namespace: c.namespace,
Annotations: c.annotations,
},
Spec: vs,
}
return config
}
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