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1103044598
Now when we have HA for egress proxies, it makes sense to support topology spread constraints that would allow users to define more complex topologies of how proxy Pods need to be deployed in relation with other Pods/across regions etc. Updates tailscale/tailscale#13406 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
347 lines
19 KiB
Go
347 lines
19 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build !plan9
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package main
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import (
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_ "embed"
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"fmt"
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"reflect"
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"regexp"
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"strings"
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"testing"
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"github.com/google/go-cmp/cmp"
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"go.uber.org/zap"
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appsv1 "k8s.io/api/apps/v1"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"sigs.k8s.io/yaml"
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tsapi "tailscale.com/k8s-operator/apis/v1alpha1"
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"tailscale.com/types/ptr"
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)
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// Test_statefulSetNameBase tests that parent name portion in a StatefulSet name
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// base will be truncated if the parent name is longer than 43 chars to ensure
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// that the total does not exceed 52 chars.
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// How many chars need to be cut off parent name depends on an internal var in
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// kube name generation code that can change at which point this test will break
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// and need to be changed. This is okay as we do not rely on that value in
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// code whilst being aware when it changes might still be useful.
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// https://github.com/kubernetes/kubernetes/blob/v1.28.4/staging/src/k8s.io/apiserver/pkg/storage/names/generate.go#L45.
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// https://github.com/kubernetes/kubernetes/pull/116430
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func Test_statefulSetNameBase(t *testing.T) {
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// Service name lengths can be 1 - 63 chars, be paranoid and test them all.
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var b strings.Builder
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for b.Len() < 63 {
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if _, err := b.WriteString("a"); err != nil {
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t.Fatalf("error writing to string builder: %v", err)
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}
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baseLength := b.Len()
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if baseLength > 43 {
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baseLength = 43 // currently 43 is the max base length
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}
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wantsNameR := regexp.MustCompile(`^ts-a{` + fmt.Sprint(baseLength) + `}-$`) // to match a string like ts-aaaa-
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gotName := statefulSetNameBase(b.String())
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if !wantsNameR.MatchString(gotName) {
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t.Fatalf("expected string %s to match regex %s ", gotName, wantsNameR.String()) // fatal rather than error as this test is called 63 times
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}
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}
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}
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func Test_applyProxyClassToStatefulSet(t *testing.T) {
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zl, err := zap.NewDevelopment()
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if err != nil {
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t.Fatal(err)
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}
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// Setup
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proxyClassAllOpts := &tsapi.ProxyClass{
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Spec: tsapi.ProxyClassSpec{
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StatefulSet: &tsapi.StatefulSet{
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Labels: map[string]string{"foo": "bar"},
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Annotations: map[string]string{"foo.io/bar": "foo"},
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Pod: &tsapi.Pod{
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Labels: map[string]string{"bar": "foo"},
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Annotations: map[string]string{"bar.io/foo": "foo"},
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SecurityContext: &corev1.PodSecurityContext{
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RunAsUser: ptr.To(int64(0)),
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},
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ImagePullSecrets: []corev1.LocalObjectReference{{Name: "docker-creds"}},
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NodeName: "some-node",
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NodeSelector: map[string]string{"beta.kubernetes.io/os": "linux"},
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Affinity: &corev1.Affinity{NodeAffinity: &corev1.NodeAffinity{RequiredDuringSchedulingIgnoredDuringExecution: &corev1.NodeSelector{}}},
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Tolerations: []corev1.Toleration{{Key: "", Operator: "Exists"}},
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TopologySpreadConstraints: []corev1.TopologySpreadConstraint{
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{
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WhenUnsatisfiable: "DoNotSchedule",
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TopologyKey: "kubernetes.io/hostname",
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MaxSkew: 3,
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LabelSelector: &metav1.LabelSelector{
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MatchLabels: map[string]string{"foo": "bar"},
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},
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},
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},
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TailscaleContainer: &tsapi.Container{
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SecurityContext: &corev1.SecurityContext{
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Privileged: ptr.To(true),
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},
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Resources: corev1.ResourceRequirements{
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Limits: corev1.ResourceList{corev1.ResourceCPU: resource.MustParse("1000m"), corev1.ResourceMemory: resource.MustParse("128Mi")},
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Requests: corev1.ResourceList{corev1.ResourceCPU: resource.MustParse("500m"), corev1.ResourceMemory: resource.MustParse("64Mi")},
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},
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Env: []tsapi.Env{{Name: "foo", Value: "bar"}, {Name: "TS_USERSPACE", Value: "true"}, {Name: "bar"}},
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ImagePullPolicy: "IfNotPresent",
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Image: "ghcr.io/my-repo/tailscale:v0.01testsomething",
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},
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TailscaleInitContainer: &tsapi.Container{
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SecurityContext: &corev1.SecurityContext{
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Privileged: ptr.To(true),
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RunAsUser: ptr.To(int64(0)),
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},
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Resources: corev1.ResourceRequirements{
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Limits: corev1.ResourceList{corev1.ResourceCPU: resource.MustParse("1000m"), corev1.ResourceMemory: resource.MustParse("128Mi")},
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Requests: corev1.ResourceList{corev1.ResourceCPU: resource.MustParse("500m"), corev1.ResourceMemory: resource.MustParse("64Mi")},
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},
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Env: []tsapi.Env{{Name: "foo", Value: "bar"}, {Name: "TS_USERSPACE", Value: "true"}, {Name: "bar"}},
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ImagePullPolicy: "IfNotPresent",
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Image: "ghcr.io/my-repo/tailscale:v0.01testsomething",
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},
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},
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},
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},
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}
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proxyClassJustLabels := &tsapi.ProxyClass{
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Spec: tsapi.ProxyClassSpec{
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StatefulSet: &tsapi.StatefulSet{
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Labels: map[string]string{"foo": "bar"},
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Annotations: map[string]string{"foo.io/bar": "foo"},
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Pod: &tsapi.Pod{
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Labels: map[string]string{"bar": "foo"},
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Annotations: map[string]string{"bar.io/foo": "foo"},
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},
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},
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},
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}
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proxyClassMetrics := &tsapi.ProxyClass{
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Spec: tsapi.ProxyClassSpec{
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Metrics: &tsapi.Metrics{Enable: true},
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},
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}
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var userspaceProxySS, nonUserspaceProxySS appsv1.StatefulSet
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if err := yaml.Unmarshal(userspaceProxyYaml, &userspaceProxySS); err != nil {
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t.Fatalf("unmarshaling userspace proxy template: %v", err)
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}
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if err := yaml.Unmarshal(proxyYaml, &nonUserspaceProxySS); err != nil {
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t.Fatalf("unmarshaling non-userspace proxy template: %v", err)
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}
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// Set a couple additional fields so we can test that we don't
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// mistakenly override those.
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labels := map[string]string{
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LabelManaged: "true",
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LabelParentName: "foo",
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}
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annots := map[string]string{
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podAnnotationLastSetClusterIP: "1.2.3.4",
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}
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env := []corev1.EnvVar{{Name: "TS_HOSTNAME", Value: "nginx"}}
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userspaceProxySS.Labels = labels
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userspaceProxySS.Annotations = annots
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userspaceProxySS.Spec.Template.Spec.Containers[0].Image = "tailscale/tailscale:v0.0.1"
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userspaceProxySS.Spec.Template.Spec.Containers[0].Env = env
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nonUserspaceProxySS.ObjectMeta.Labels = labels
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nonUserspaceProxySS.ObjectMeta.Annotations = annots
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nonUserspaceProxySS.Spec.Template.Spec.Containers[0].Env = env
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nonUserspaceProxySS.Spec.Template.Spec.InitContainers[0].Image = "tailscale/tailscale:v0.0.1"
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// 1. Test that a ProxyClass with all fields set gets correctly applied
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// to a Statefulset built from non-userspace proxy template.
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wantSS := nonUserspaceProxySS.DeepCopy()
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wantSS.ObjectMeta.Labels = mergeMapKeys(wantSS.ObjectMeta.Labels, proxyClassAllOpts.Spec.StatefulSet.Labels)
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wantSS.ObjectMeta.Annotations = mergeMapKeys(wantSS.ObjectMeta.Annotations, proxyClassAllOpts.Spec.StatefulSet.Annotations)
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wantSS.Spec.Template.Labels = proxyClassAllOpts.Spec.StatefulSet.Pod.Labels
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wantSS.Spec.Template.Annotations = proxyClassAllOpts.Spec.StatefulSet.Pod.Annotations
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wantSS.Spec.Template.Spec.SecurityContext = proxyClassAllOpts.Spec.StatefulSet.Pod.SecurityContext
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wantSS.Spec.Template.Spec.ImagePullSecrets = proxyClassAllOpts.Spec.StatefulSet.Pod.ImagePullSecrets
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wantSS.Spec.Template.Spec.NodeName = proxyClassAllOpts.Spec.StatefulSet.Pod.NodeName
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wantSS.Spec.Template.Spec.NodeSelector = proxyClassAllOpts.Spec.StatefulSet.Pod.NodeSelector
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wantSS.Spec.Template.Spec.Affinity = proxyClassAllOpts.Spec.StatefulSet.Pod.Affinity
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wantSS.Spec.Template.Spec.Tolerations = proxyClassAllOpts.Spec.StatefulSet.Pod.Tolerations
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wantSS.Spec.Template.Spec.TopologySpreadConstraints = proxyClassAllOpts.Spec.StatefulSet.Pod.TopologySpreadConstraints
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wantSS.Spec.Template.Spec.Containers[0].SecurityContext = proxyClassAllOpts.Spec.StatefulSet.Pod.TailscaleContainer.SecurityContext
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wantSS.Spec.Template.Spec.InitContainers[0].SecurityContext = proxyClassAllOpts.Spec.StatefulSet.Pod.TailscaleInitContainer.SecurityContext
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wantSS.Spec.Template.Spec.Containers[0].Resources = proxyClassAllOpts.Spec.StatefulSet.Pod.TailscaleContainer.Resources
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wantSS.Spec.Template.Spec.InitContainers[0].Resources = proxyClassAllOpts.Spec.StatefulSet.Pod.TailscaleInitContainer.Resources
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wantSS.Spec.Template.Spec.InitContainers[0].Env = append(wantSS.Spec.Template.Spec.InitContainers[0].Env, []corev1.EnvVar{{Name: "foo", Value: "bar"}, {Name: "TS_USERSPACE", Value: "true"}, {Name: "bar"}}...)
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wantSS.Spec.Template.Spec.Containers[0].Env = append(wantSS.Spec.Template.Spec.Containers[0].Env, []corev1.EnvVar{{Name: "foo", Value: "bar"}, {Name: "TS_USERSPACE", Value: "true"}, {Name: "bar"}}...)
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wantSS.Spec.Template.Spec.Containers[0].Image = "ghcr.io/my-repo/tailscale:v0.01testsomething"
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wantSS.Spec.Template.Spec.Containers[0].ImagePullPolicy = "IfNotPresent"
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wantSS.Spec.Template.Spec.InitContainers[0].Image = "ghcr.io/my-repo/tailscale:v0.01testsomething"
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wantSS.Spec.Template.Spec.InitContainers[0].ImagePullPolicy = "IfNotPresent"
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gotSS := applyProxyClassToStatefulSet(proxyClassAllOpts, nonUserspaceProxySS.DeepCopy(), new(tailscaleSTSConfig), zl.Sugar())
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if diff := cmp.Diff(gotSS, wantSS); diff != "" {
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t.Fatalf("Unexpected result applying ProxyClass with all fields set to a StatefulSet for non-userspace proxy (-got +want):\n%s", diff)
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}
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// 2. Test that a ProxyClass with custom labels and annotations for
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// StatefulSet and Pod set gets correctly applied to a Statefulset built
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// from non-userspace proxy template.
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wantSS = nonUserspaceProxySS.DeepCopy()
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wantSS.ObjectMeta.Labels = mergeMapKeys(wantSS.ObjectMeta.Labels, proxyClassJustLabels.Spec.StatefulSet.Labels)
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wantSS.ObjectMeta.Annotations = mergeMapKeys(wantSS.ObjectMeta.Annotations, proxyClassJustLabels.Spec.StatefulSet.Annotations)
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wantSS.Spec.Template.Labels = proxyClassJustLabels.Spec.StatefulSet.Pod.Labels
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wantSS.Spec.Template.Annotations = proxyClassJustLabels.Spec.StatefulSet.Pod.Annotations
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gotSS = applyProxyClassToStatefulSet(proxyClassJustLabels, nonUserspaceProxySS.DeepCopy(), new(tailscaleSTSConfig), zl.Sugar())
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if diff := cmp.Diff(gotSS, wantSS); diff != "" {
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t.Fatalf("Unexpected result applying ProxyClass with custom labels and annotations to a StatefulSet for non-userspace proxy (-got +want):\n%s", diff)
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}
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// 3. Test that a ProxyClass with all fields set gets correctly applied
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// to a Statefulset built from a userspace proxy template.
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wantSS = userspaceProxySS.DeepCopy()
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wantSS.ObjectMeta.Labels = mergeMapKeys(wantSS.ObjectMeta.Labels, proxyClassAllOpts.Spec.StatefulSet.Labels)
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wantSS.ObjectMeta.Annotations = mergeMapKeys(wantSS.ObjectMeta.Annotations, proxyClassAllOpts.Spec.StatefulSet.Annotations)
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wantSS.Spec.Template.Labels = proxyClassAllOpts.Spec.StatefulSet.Pod.Labels
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wantSS.Spec.Template.Annotations = proxyClassAllOpts.Spec.StatefulSet.Pod.Annotations
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wantSS.Spec.Template.Spec.SecurityContext = proxyClassAllOpts.Spec.StatefulSet.Pod.SecurityContext
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wantSS.Spec.Template.Spec.ImagePullSecrets = proxyClassAllOpts.Spec.StatefulSet.Pod.ImagePullSecrets
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wantSS.Spec.Template.Spec.NodeName = proxyClassAllOpts.Spec.StatefulSet.Pod.NodeName
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wantSS.Spec.Template.Spec.NodeSelector = proxyClassAllOpts.Spec.StatefulSet.Pod.NodeSelector
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wantSS.Spec.Template.Spec.Affinity = proxyClassAllOpts.Spec.StatefulSet.Pod.Affinity
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wantSS.Spec.Template.Spec.Tolerations = proxyClassAllOpts.Spec.StatefulSet.Pod.Tolerations
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wantSS.Spec.Template.Spec.TopologySpreadConstraints = proxyClassAllOpts.Spec.StatefulSet.Pod.TopologySpreadConstraints
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wantSS.Spec.Template.Spec.Containers[0].SecurityContext = proxyClassAllOpts.Spec.StatefulSet.Pod.TailscaleContainer.SecurityContext
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wantSS.Spec.Template.Spec.Containers[0].Resources = proxyClassAllOpts.Spec.StatefulSet.Pod.TailscaleContainer.Resources
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wantSS.Spec.Template.Spec.Containers[0].Env = append(wantSS.Spec.Template.Spec.Containers[0].Env, []corev1.EnvVar{{Name: "foo", Value: "bar"}, {Name: "TS_USERSPACE", Value: "true"}, {Name: "bar"}}...)
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wantSS.Spec.Template.Spec.Containers[0].ImagePullPolicy = "IfNotPresent"
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wantSS.Spec.Template.Spec.Containers[0].Image = "ghcr.io/my-repo/tailscale:v0.01testsomething"
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gotSS = applyProxyClassToStatefulSet(proxyClassAllOpts, userspaceProxySS.DeepCopy(), new(tailscaleSTSConfig), zl.Sugar())
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if diff := cmp.Diff(gotSS, wantSS); diff != "" {
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t.Fatalf("Unexpected result applying ProxyClass with all options to a StatefulSet for a userspace proxy (-got +want):\n%s", diff)
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}
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// 4. Test that a ProxyClass with custom labels and annotations gets correctly applied
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// to a Statefulset built from a userspace proxy template.
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wantSS = userspaceProxySS.DeepCopy()
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wantSS.ObjectMeta.Labels = mergeMapKeys(wantSS.ObjectMeta.Labels, proxyClassJustLabels.Spec.StatefulSet.Labels)
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wantSS.ObjectMeta.Annotations = mergeMapKeys(wantSS.ObjectMeta.Annotations, proxyClassJustLabels.Spec.StatefulSet.Annotations)
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wantSS.Spec.Template.Labels = proxyClassJustLabels.Spec.StatefulSet.Pod.Labels
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wantSS.Spec.Template.Annotations = proxyClassJustLabels.Spec.StatefulSet.Pod.Annotations
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gotSS = applyProxyClassToStatefulSet(proxyClassJustLabels, userspaceProxySS.DeepCopy(), new(tailscaleSTSConfig), zl.Sugar())
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if diff := cmp.Diff(gotSS, wantSS); diff != "" {
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t.Fatalf("Unexpected result applying ProxyClass with custom labels and annotations to a StatefulSet for a userspace proxy (-got +want):\n%s", diff)
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}
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// 5. Test that a ProxyClass with metrics enabled gets correctly applied to a StatefulSet.
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wantSS = nonUserspaceProxySS.DeepCopy()
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wantSS.Spec.Template.Spec.Containers[0].Env = append(wantSS.Spec.Template.Spec.Containers[0].Env, corev1.EnvVar{Name: "TS_TAILSCALED_EXTRA_ARGS", Value: "--debug=$(POD_IP):9001"})
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wantSS.Spec.Template.Spec.Containers[0].Ports = []corev1.ContainerPort{{Name: "metrics", Protocol: "TCP", ContainerPort: 9001, HostPort: 9001}}
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gotSS = applyProxyClassToStatefulSet(proxyClassMetrics, nonUserspaceProxySS.DeepCopy(), new(tailscaleSTSConfig), zl.Sugar())
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if diff := cmp.Diff(gotSS, wantSS); diff != "" {
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t.Fatalf("Unexpected result applying ProxyClass with metrics enabled to a StatefulSet (-got +want):\n%s", diff)
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}
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}
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func mergeMapKeys(a, b map[string]string) map[string]string {
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for key, val := range b {
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a[key] = val
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}
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return a
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}
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func Test_mergeStatefulSetLabelsOrAnnots(t *testing.T) {
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tests := []struct {
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name string
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current map[string]string
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custom map[string]string
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managed []string
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want map[string]string
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}{
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{
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name: "no custom labels specified and none present in current labels, return current labels",
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current: map[string]string{LabelManaged: "true", LabelParentName: "foo", LabelParentType: "svc", LabelParentNamespace: "foo"},
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want: map[string]string{LabelManaged: "true", LabelParentName: "foo", LabelParentType: "svc", LabelParentNamespace: "foo"},
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managed: tailscaleManagedLabels,
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},
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{
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name: "no custom labels specified, but some present in current labels, return tailscale managed labels only from the current labels",
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current: map[string]string{"foo": "bar", "something.io/foo": "bar", LabelManaged: "true", LabelParentName: "foo", LabelParentType: "svc", LabelParentNamespace: "foo"},
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want: map[string]string{LabelManaged: "true", LabelParentName: "foo", LabelParentType: "svc", LabelParentNamespace: "foo"},
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managed: tailscaleManagedLabels,
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},
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{
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name: "custom labels specified, current labels only contain tailscale managed labels, return a union of both",
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current: map[string]string{LabelManaged: "true", LabelParentName: "foo", LabelParentType: "svc", LabelParentNamespace: "foo"},
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custom: map[string]string{"foo": "bar", "something.io/foo": "bar"},
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want: map[string]string{"foo": "bar", "something.io/foo": "bar", LabelManaged: "true", LabelParentName: "foo", LabelParentType: "svc", LabelParentNamespace: "foo"},
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managed: tailscaleManagedLabels,
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},
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{
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name: "custom labels specified, current labels contain tailscale managed labels and custom labels, some of which re not present in the new custom labels, return a union of managed labels and the desired custom labels",
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current: map[string]string{"foo": "bar", "bar": "baz", "app": "1234", LabelManaged: "true", LabelParentName: "foo", LabelParentType: "svc", LabelParentNamespace: "foo"},
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custom: map[string]string{"foo": "bar", "something.io/foo": "bar"},
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want: map[string]string{"foo": "bar", "something.io/foo": "bar", "app": "1234", LabelManaged: "true", LabelParentName: "foo", LabelParentType: "svc", LabelParentNamespace: "foo"},
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managed: tailscaleManagedLabels,
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},
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{
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name: "no current labels present, return custom labels only",
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custom: map[string]string{"foo": "bar", "something.io/foo": "bar"},
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want: map[string]string{"foo": "bar", "something.io/foo": "bar"},
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managed: tailscaleManagedLabels,
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},
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{
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name: "no current labels present, no custom labels specified, return empty map",
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want: map[string]string{},
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managed: tailscaleManagedLabels,
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},
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{
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name: "no custom annots specified and none present in current annots, return current annots",
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current: map[string]string{podAnnotationLastSetClusterIP: "1.2.3.4"},
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want: map[string]string{podAnnotationLastSetClusterIP: "1.2.3.4"},
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managed: tailscaleManagedAnnotations,
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},
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{
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name: "no custom annots specified, but some present in current annots, return tailscale managed annots only from the current annots",
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current: map[string]string{"foo": "bar", "something.io/foo": "bar", podAnnotationLastSetClusterIP: "1.2.3.4"},
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want: map[string]string{podAnnotationLastSetClusterIP: "1.2.3.4"},
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managed: tailscaleManagedAnnotations,
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},
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{
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name: "custom annots specified, current annots only contain tailscale managed annots, return a union of both",
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current: map[string]string{podAnnotationLastSetClusterIP: "1.2.3.4"},
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custom: map[string]string{"foo": "bar", "something.io/foo": "bar"},
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want: map[string]string{"foo": "bar", "something.io/foo": "bar", podAnnotationLastSetClusterIP: "1.2.3.4"},
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managed: tailscaleManagedAnnotations,
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},
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{
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name: "custom annots specified, current annots contain tailscale managed annots and custom annots, some of which are not present in the new custom annots, return a union of managed annots and the desired custom annots",
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current: map[string]string{"foo": "bar", "something.io/foo": "bar", podAnnotationLastSetClusterIP: "1.2.3.4"},
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custom: map[string]string{"something.io/foo": "bar"},
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want: map[string]string{"something.io/foo": "bar", podAnnotationLastSetClusterIP: "1.2.3.4"},
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managed: tailscaleManagedAnnotations,
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},
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{
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name: "no current annots present, return custom annots only",
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custom: map[string]string{"foo": "bar", "something.io/foo": "bar"},
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want: map[string]string{"foo": "bar", "something.io/foo": "bar"},
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managed: tailscaleManagedAnnotations,
|
|
},
|
|
{
|
|
name: "no current labels present, no custom labels specified, return empty map",
|
|
want: map[string]string{},
|
|
managed: tailscaleManagedAnnotations,
|
|
},
|
|
}
|
|
for _, tt := range tests {
|
|
t.Run(tt.name, func(t *testing.T) {
|
|
if got := mergeStatefulSetLabelsOrAnnots(tt.current, tt.custom, tt.managed); !reflect.DeepEqual(got, tt.want) {
|
|
t.Errorf("mergeStatefulSetLabels() = %v, want %v", got, tt.want)
|
|
}
|
|
})
|
|
}
|
|
}
|