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// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause
//go:build !plan9
// tailscale-operator provides a way to expose services running in a Kubernetes
// cluster to your Tailnet and to make Tailscale nodes available to cluster
// workloads
package main
import (
"encoding/json"
"testing"
"time"
"go.uber.org/zap"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/controller-runtime/pkg/client/fake"
"sigs.k8s.io/yaml"
operatorutils "tailscale.com/k8s-operator"
tsapi "tailscale.com/k8s-operator/apis/v1alpha1"
"tailscale.com/tstest"
"tailscale.com/types/ptr"
"tailscale.com/util/mak"
)
func TestNameserverReconciler(t *testing.T) {
dnsConfig := &tsapi.DNSConfig{
TypeMeta: metav1.TypeMeta{Kind: "DNSConfig", APIVersion: "tailscale.com/v1alpha1"},
ObjectMeta: metav1.ObjectMeta{
Name: "test",
},
Spec: tsapi.DNSConfigSpec{
Nameserver: &tsapi.Nameserver{
Replicas: ptr.To[int32](3),
Image: &tsapi.NameserverImage{
Repo: "test",
Tag: "v0.0.1",
},
Service: &tsapi.NameserverService{
ClusterIP: "5.4.3.2",
},
Pod: &tsapi.NameserverPod{
Tolerations: []corev1.Toleration{
{
Key: "some-key",
Operator: corev1.TolerationOpEqual,
Value: "some-value",
Effect: corev1.TaintEffectNoSchedule,
},
},
},
},
},
}
fc := fake.NewClientBuilder().
WithScheme(tsapi.GlobalScheme).
WithObjects(dnsConfig).
WithStatusSubresource(dnsConfig).
Build()
logger, err := zap.NewDevelopment()
if err != nil {
t.Fatal(err)
}
clock := tstest.NewClock(tstest.ClockOpts{})
reconciler := &NameserverReconciler{
Client: fc,
clock: clock,
logger: logger.Sugar(),
tsNamespace: tsNamespace,
}
expectReconciled(t, reconciler, "", "test")
ownerReference := metav1.NewControllerRef(dnsConfig, tsapi.SchemeGroupVersion.WithKind("DNSConfig"))
nameserverLabels := nameserverResourceLabels(dnsConfig.Name, tsNamespace)
wantsDeploy := &appsv1.Deployment{ObjectMeta: metav1.ObjectMeta{Name: "nameserver", Namespace: tsNamespace}, TypeMeta: metav1.TypeMeta{Kind: "Deployment", APIVersion: appsv1.SchemeGroupVersion.Identifier()}}
t.Run("deployment has expected fields", func(t *testing.T) {
if err = yaml.Unmarshal(deployYaml, wantsDeploy); err != nil {
t.Fatalf("unmarshalling yaml: %v", err)
}
wantsDeploy.OwnerReferences = []metav1.OwnerReference{*ownerReference}
wantsDeploy.Spec.Template.Spec.Containers[0].Image = "test:v0.0.1"
wantsDeploy.Spec.Replicas = ptr.To[int32](3)
wantsDeploy.Namespace = tsNamespace
wantsDeploy.ObjectMeta.Labels = nameserverLabels
wantsDeploy.Spec.Template.Spec.Tolerations = []corev1.Toleration{
{
Key: "some-key",
Operator: corev1.TolerationOpEqual,
Value: "some-value",
Effect: corev1.TaintEffectNoSchedule,
},
}
expectEqual(t, fc, wantsDeploy)
})
wantsSvc := &corev1.Service{ObjectMeta: metav1.ObjectMeta{Name: "nameserver", Namespace: tsNamespace}, TypeMeta: metav1.TypeMeta{Kind: "Service", APIVersion: corev1.SchemeGroupVersion.Identifier()}}
t.Run("service has expected fields", func(t *testing.T) {
if err = yaml.Unmarshal(svcYaml, wantsSvc); err != nil {
t.Fatalf("unmarshalling yaml: %v", err)
}
wantsSvc.Spec.ClusterIP = dnsConfig.Spec.Nameserver.Service.ClusterIP
wantsSvc.OwnerReferences = []metav1.OwnerReference{*ownerReference}
wantsSvc.Namespace = tsNamespace
wantsSvc.ObjectMeta.Labels = nameserverLabels
expectEqual(t, fc, wantsSvc)
})
t.Run("dns config status is set", func(t *testing.T) {
// Verify that DNSConfig advertizes the nameserver's Service IP address,
// has the ready status condition and tailscale finalizer.
mustUpdate(t, fc, "tailscale", "nameserver", func(svc *corev1.Service) {
svc.Spec.ClusterIP = "1.2.3.4"
})
expectReconciled(t, reconciler, "", "test")
dnsConfig.Finalizers = []string{FinalizerName}
dnsConfig.Status.Nameserver = &tsapi.NameserverStatus{
IP: "1.2.3.4",
}
dnsConfig.Status.Conditions = append(dnsConfig.Status.Conditions, metav1.Condition{
Type: string(tsapi.NameserverReady),
Status: metav1.ConditionTrue,
Reason: reasonNameserverCreated,
Message: reasonNameserverCreated,
LastTransitionTime: metav1.Time{Time: clock.Now().Truncate(time.Second)},
})
expectEqual(t, fc, dnsConfig)
})
t.Run("nameserver image can be updated", func(t *testing.T) {
// Verify that nameserver image gets updated to match DNSConfig spec.
mustUpdate(t, fc, "", "test", func(dnsCfg *tsapi.DNSConfig) {
dnsCfg.Spec.Nameserver.Image.Tag = "v0.0.2"
})
expectReconciled(t, reconciler, "", "test")
wantsDeploy.Spec.Template.Spec.Containers[0].Image = "test:v0.0.2"
expectEqual(t, fc, wantsDeploy)
})
t.Run("reconciler does not overwrite custom configuration", func(t *testing.T) {
// Verify that when another actor sets ConfigMap data, it does not get
// overwritten by nameserver reconciler.
dnsRecords := &operatorutils.Records{Version: "v1alpha1", IP4: map[string][]string{"foo.ts.net": {"1.2.3.4"}}}
bs, err := json.Marshal(dnsRecords)
if err != nil {
t.Fatalf("error marshalling ConfigMap contents: %v", err)
}
mustUpdate(t, fc, "tailscale", "dnsrecords", func(cm *corev1.ConfigMap) {
mak.Set(&cm.Data, "records.json", string(bs))
})
expectReconciled(t, reconciler, "", "test")
wantCm := &corev1.ConfigMap{
ObjectMeta: metav1.ObjectMeta{
Name: "dnsrecords",
Namespace: "tailscale",
Labels: nameserverLabels,
OwnerReferences: []metav1.OwnerReference{*ownerReference},
},
TypeMeta: metav1.TypeMeta{Kind: "ConfigMap", APIVersion: "v1"},
Data: map[string]string{"records.json": string(bs)},
}
expectEqual(t, fc, wantCm)
})
t.Run("uses default nameserver image", func(t *testing.T) {
// Verify that if dnsconfig.spec.nameserver.image.{repo,tag} are unset,
// the nameserver image defaults to tailscale/k8s-nameserver:unstable.
mustUpdate(t, fc, "", "test", func(dnsCfg *tsapi.DNSConfig) {
dnsCfg.Spec.Nameserver.Image = nil
})
expectReconciled(t, reconciler, "", "test")
wantsDeploy.Spec.Template.Spec.Containers[0].Image = "tailscale/k8s-nameserver:stable"
expectEqual(t, fc, wantsDeploy)
})
}
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