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feat: add PodDisruptionBudget support for Karmada control plane components
Signed-off-by: baiyutang <[email protected]>
1 parent 25cf101 commit 5b4b485

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16 files changed

+607
-198
lines changed

16 files changed

+607
-198
lines changed

charts/karmada-operator/templates/karmada-operator-clusterrole.yaml

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -28,5 +28,8 @@ rules:
2828
- apiGroups: ["apps"]
2929
resources: ["statefulsets", "deployments"] # to manage statefulsets, e.g. etcd, and deployments, e.g. karmada-operator
3030
verbs: ["get", "create", "update", "delete"]
31+
- apiGroups: ["policy"]
32+
resources: ["poddisruptionbudgets"] # to manage pod disruption budgets for karmada components
33+
verbs: ["get", "create", "update", "delete"]
3134
- nonResourceURLs: ["/healthz"] # used to check whether the karmada apiserver is health
3235
verbs: ["get"]

operator/config/deploy/karmada-operator-clusterrole.yaml

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -29,5 +29,8 @@ rules:
2929
- apiGroups: ["apps"]
3030
resources: ["statefulsets", "deployments"] # to manage statefulsets, e.g. etcd, and deployments, e.g. karmada-operator
3131
verbs: ["get", "create", "update", "delete"]
32+
- apiGroups: ["policy"]
33+
resources: ["poddisruptionbudgets"] # to manage pod disruption budgets for karmada components
34+
verbs: ["get", "create", "update", "delete"]
3235
- nonResourceURLs: ["/healthz"] # used to check whether the karmada apiserver is health
3336
verbs: ["get"]

operator/pkg/controlplane/apiserver/apiserver.go

Lines changed: 30 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,8 @@
11
/*
22
Copyright 2023 The Karmada Authors.
33
4+
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
5+
"k8s.io/apimachinery/pkg/runtime/schema"
46
Licensed under the Apache License, Version 2.0 (the "License");
57
you may not use this file except in compliance with the License.
68
You may obtain a copy of the License at
@@ -17,17 +19,21 @@ limitations under the License.
1719
package apiserver
1820

1921
import (
22+
"context"
2023
"fmt"
2124

2225
appsv1 "k8s.io/api/apps/v1"
2326
corev1 "k8s.io/api/core/v1"
27+
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
2428
"k8s.io/apimachinery/pkg/labels"
2529
kuberuntime "k8s.io/apimachinery/pkg/runtime"
30+
"k8s.io/apimachinery/pkg/runtime/schema"
2631
clientset "k8s.io/client-go/kubernetes"
2732
clientsetscheme "k8s.io/client-go/kubernetes/scheme"
2833

2934
operatorv1alpha1 "github.com/karmada-io/karmada/operator/pkg/apis/operator/v1alpha1"
3035
"github.com/karmada-io/karmada/operator/pkg/controlplane/etcd"
36+
"github.com/karmada-io/karmada/operator/pkg/controlplane/pdb"
3137
"github.com/karmada-io/karmada/operator/pkg/util"
3238
"github.com/karmada-io/karmada/operator/pkg/util/apiclient"
3339
"github.com/karmada-io/karmada/operator/pkg/util/patcher"
@@ -87,6 +93,18 @@ func installKarmadaAPIServer(client clientset.Interface, cfg *operatorv1alpha1.K
8793
if err := apiclient.CreateOrUpdateDeployment(client, apiserverDeployment); err != nil {
8894
return fmt.Errorf("error when creating deployment for %s, err: %w", apiserverDeployment.Name, err)
8995
}
96+
97+
// Fetch persisted Deployment to get real UID
98+
persisted, err := client.AppsV1().Deployments(namespace).Get(context.TODO(), apiserverDeployment.GetName(), metav1.GetOptions{})
99+
if err != nil {
100+
return fmt.Errorf("failed to fetch Deployment %s/%s for PDB owner, err: %w", namespace, apiserverDeployment.GetName(), err)
101+
}
102+
gvk := schema.GroupVersionKind{Group: "apps", Version: "v1", Kind: "Deployment"}
103+
ownerRef := *metav1.NewControllerRef(persisted, gvk)
104+
if err := pdb.EnsurePodDisruptionBudget(client, util.KarmadaAPIServerName(name), namespace, cfg.CommonSettings.PodDisruptionBudgetConfig, apiserverDeployment.Spec.Template.Labels, []metav1.OwnerReference{ownerRef}); err != nil {
105+
return fmt.Errorf("failed to ensure PDB for apiserver component %s, err: %w", util.KarmadaAPIServerName(name), err)
106+
}
107+
90108
return nil
91109
}
92110

@@ -158,6 +176,18 @@ func installKarmadaAggregatedAPIServer(client clientset.Interface, cfg *operator
158176
if err := apiclient.CreateOrUpdateDeployment(client, aggregatedAPIServerDeployment); err != nil {
159177
return fmt.Errorf("error when creating deployment for %s, err: %w", aggregatedAPIServerDeployment.Name, err)
160178
}
179+
180+
// Fetch persisted Deployment to get real UID
181+
persistedAgg, err := client.AppsV1().Deployments(namespace).Get(context.TODO(), aggregatedAPIServerDeployment.GetName(), metav1.GetOptions{})
182+
if err != nil {
183+
return fmt.Errorf("failed to fetch Deployment %s/%s for PDB owner, err: %w", namespace, aggregatedAPIServerDeployment.GetName(), err)
184+
}
185+
gvk2 := schema.GroupVersionKind{Group: "apps", Version: "v1", Kind: "Deployment"}
186+
ownerRef2 := *metav1.NewControllerRef(persistedAgg, gvk2)
187+
if err := pdb.EnsurePodDisruptionBudget(client, util.KarmadaAggregatedAPIServerName(name), namespace, cfg.CommonSettings.PodDisruptionBudgetConfig, aggregatedAPIServerDeployment.Spec.Template.Labels, []metav1.OwnerReference{ownerRef2}); err != nil {
188+
return fmt.Errorf("failed to ensure PDB for aggregated apiserver component %s, err: %w", util.KarmadaAggregatedAPIServerName(name), err)
189+
}
190+
161191
return nil
162192
}
163193

operator/pkg/controlplane/apiserver/apiserver_test.go

Lines changed: 88 additions & 26 deletions
Original file line numberDiff line numberDiff line change
@@ -67,8 +67,35 @@ func TestEnsureKarmadaAPIServer(t *testing.T) {
6767
}
6868

6969
actions := fakeClient.Actions()
70-
if len(actions) != 2 {
71-
t.Fatalf("expected 2 actions, but got %d", len(actions))
70+
// We now create deployment, service, and PDB, so expect 3 actions
71+
if len(actions) != 3 {
72+
t.Fatalf("expected 3 actions, but got %d", len(actions))
73+
}
74+
75+
// Check that we have deployment, service, and PDB
76+
deploymentCount := 0
77+
serviceCount := 0
78+
pdbCount := 0
79+
for _, action := range actions {
80+
if action.GetResource().Resource == "deployments" {
81+
deploymentCount++
82+
} else if action.GetResource().Resource == "services" {
83+
serviceCount++
84+
} else if action.GetResource().Resource == "poddisruptionbudgets" {
85+
pdbCount++
86+
}
87+
}
88+
89+
if deploymentCount != 1 {
90+
t.Errorf("expected 1 deployment action, but got %d", deploymentCount)
91+
}
92+
93+
if serviceCount != 1 {
94+
t.Errorf("expected 1 service action, but got %d", serviceCount)
95+
}
96+
97+
if pdbCount != 1 {
98+
t.Errorf("expected 1 PDB action, but got %d", pdbCount)
7299
}
73100
}
74101

@@ -108,8 +135,35 @@ func TestEnsureKarmadaAggregatedAPIServer(t *testing.T) {
108135
}
109136

110137
actions := fakeClient.Actions()
111-
if len(actions) != 2 {
112-
t.Fatalf("expected 2 actions, but got %d", len(actions))
138+
// We now create deployment, service, and PDB, so expect 3 actions
139+
if len(actions) != 3 {
140+
t.Fatalf("expected 3 actions, but got %d", len(actions))
141+
}
142+
143+
// Check that we have deployment, service, and PDB
144+
deploymentCount := 0
145+
serviceCount := 0
146+
pdbCount := 0
147+
for _, action := range actions {
148+
if action.GetResource().Resource == "deployments" {
149+
deploymentCount++
150+
} else if action.GetResource().Resource == "services" {
151+
serviceCount++
152+
} else if action.GetResource().Resource == "poddisruptionbudgets" {
153+
pdbCount++
154+
}
155+
}
156+
157+
if deploymentCount != 1 {
158+
t.Errorf("expected 1 deployment action, but got %d", deploymentCount)
159+
}
160+
161+
if serviceCount != 1 {
162+
t.Errorf("expected 1 service action, but got %d", serviceCount)
163+
}
164+
165+
if pdbCount != 1 {
166+
t.Errorf("expected 1 PDB action, but got %d", pdbCount)
113167
}
114168
}
115169

@@ -152,9 +206,14 @@ func TestInstallKarmadaAPIServer(t *testing.T) {
152206
t.Fatalf("expected no error, but got: %v", err)
153207
}
154208

155-
deployment, err := verifyDeploymentCreation(fakeClient, &replicas, imagePullPolicy, cfg.ExtraArgs, name, namespace, image, util.KarmadaAPIServerName(name), priorityClassName)
209+
deployment, err := verifyDeploymentCreation(fakeClient)
156210
if err != nil {
157-
t.Fatalf("failed to verify karmada apiserver correct deployment creation correct details: %v", err)
211+
t.Fatalf("failed to verify karmada apiserver deployment creation: %v", err)
212+
}
213+
214+
// Verify deployment details using the existing function
215+
if err := verifyDeploymentDetails(deployment, &replicas, imagePullPolicy, cfg.ExtraArgs, name, namespace, image, util.KarmadaAPIServerName(name), priorityClassName); err != nil {
216+
t.Fatalf("failed to verify deployment details: %v", err)
158217
}
159218

160219
err = verifyAPIServerDeploymentAdditionalDetails(deployment, name, serviceSubnet)
@@ -248,9 +307,9 @@ func TestInstallKarmadaAggregatedAPIServer(t *testing.T) {
248307
t.Fatalf("Failed to install Karmada Aggregated API Server: %v", err)
249308
}
250309

251-
deployment, err := verifyDeploymentCreation(fakeClient, &replicas, imagePullPolicy, cfg.ExtraArgs, name, namespace, image, util.KarmadaAggregatedAPIServerName(name), priorityClassName)
310+
deployment, err := verifyDeploymentCreation(fakeClient)
252311
if err != nil {
253-
t.Fatalf("failed to verify karmada aggregated apiserver deployment creation correct details: %v", err)
312+
t.Fatalf("failed to verify karmada aggregated apiserver deployment creation: %v", err)
254313
}
255314

256315
err = verifyAggregatedAPIServerDeploymentAdditionalDetails(featureGates, deployment, name)
@@ -315,29 +374,32 @@ func contains(slice []string, item string) bool {
315374
// based on the given parameters. It ensures that the deployment has the correct
316375
// number of replicas, image pull policy, extra arguments, and labels, as well
317376
// as the correct image for the Karmada API server.
318-
func verifyDeploymentCreation(client *fakeclientset.Clientset, replicas *int32, imagePullPolicy corev1.PullPolicy, extraArgs map[string]string, name, namespace, image, expectedDeploymentName, priorityClassName string) (*appsv1.Deployment, error) {
319-
// Assert that a Deployment was created.
377+
func verifyDeploymentCreation(client *fakeclientset.Clientset) (*appsv1.Deployment, error) {
378+
// Assert that a Deployment and PDB were created.
320379
actions := client.Actions()
321-
if len(actions) != 1 {
322-
return nil, fmt.Errorf("expected exactly 1 action either create or update, but got %d actions", len(actions))
323-
}
324-
325-
// Check that the action was a Deployment creation.
326-
createAction, ok := actions[0].(coretesting.CreateAction)
327-
if !ok {
328-
return nil, fmt.Errorf("expected a CreateAction, but got %T", actions[0])
380+
// We now create both deployment and PDB, so expect 2 actions
381+
if len(actions) != 2 {
382+
return nil, fmt.Errorf("expected exactly 2 actions (deployment + PDB), but got %d actions", len(actions))
383+
}
384+
385+
// Find the deployment action
386+
var deployment *appsv1.Deployment
387+
for _, action := range actions {
388+
if action.GetResource().Resource == "deployments" {
389+
createAction, ok := action.(coretesting.CreateAction)
390+
if !ok {
391+
return nil, fmt.Errorf("expected a CreateAction for deployment, but got %T", action)
392+
}
393+
deployment = createAction.GetObject().(*appsv1.Deployment)
394+
break
395+
}
329396
}
330397

331-
// Check that the action was performed on the correct resource.
332-
if createAction.GetResource().Resource != "deployments" {
333-
return nil, fmt.Errorf("expected action on 'deployments', but got '%s'", createAction.GetResource().Resource)
398+
if deployment == nil {
399+
return nil, fmt.Errorf("expected deployment action, but none found")
334400
}
335401

336-
deployment := createAction.GetObject().(*appsv1.Deployment)
337-
err := verifyDeploymentDetails(deployment, replicas, imagePullPolicy, extraArgs, name, namespace, image, expectedDeploymentName, priorityClassName)
338-
if err != nil {
339-
return nil, err
340-
}
402+
// Don't validate details here, let the caller do it
341403

342404
return deployment, nil
343405
}

operator/pkg/controlplane/controlplane.go

Lines changed: 49 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,7 +1,7 @@
11
/*
22
Copyright 2023 The Karmada Authors.
33
4-
Licensed under the Apache License, Version 2.0 (the "License");
4+
55
you may not use this file except in compliance with the License.
66
You may obtain a copy of the License at
77
@@ -17,16 +17,20 @@ limitations under the License.
1717
package controlplane
1818

1919
import (
20+
"context"
2021
"fmt"
2122

2223
appsv1 "k8s.io/api/apps/v1"
24+
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
2325
kuberuntime "k8s.io/apimachinery/pkg/runtime"
26+
"k8s.io/apimachinery/pkg/runtime/schema"
2427
clientset "k8s.io/client-go/kubernetes"
2528
clientsetscheme "k8s.io/client-go/kubernetes/scheme"
2629
"k8s.io/klog/v2"
2730

2831
operatorv1alpha1 "github.com/karmada-io/karmada/operator/pkg/apis/operator/v1alpha1"
2932
"github.com/karmada-io/karmada/operator/pkg/constants"
33+
"github.com/karmada-io/karmada/operator/pkg/controlplane/pdb"
3034
"github.com/karmada-io/karmada/operator/pkg/util"
3135
"github.com/karmada-io/karmada/operator/pkg/util/apiclient"
3236
"github.com/karmada-io/karmada/operator/pkg/util/patcher"
@@ -48,6 +52,50 @@ func EnsureControlPlaneComponent(component, name, namespace string, featureGates
4852
if err := apiclient.CreateOrUpdateDeployment(client, deployment); err != nil {
4953
return fmt.Errorf("failed to create deployment resource for component %s, err: %w", component, err)
5054
}
55+
56+
// Ensure PDB for the component if configured
57+
// Map PascalCase component constants to naming functions for PDB
58+
var (
59+
commonSettings *operatorv1alpha1.CommonSettings
60+
pdbName string
61+
)
62+
switch component {
63+
case constants.KarmadaControllerManagerComponent:
64+
if cfg.KarmadaControllerManager != nil {
65+
commonSettings = &cfg.KarmadaControllerManager.CommonSettings
66+
pdbName = util.KarmadaControllerManagerName(name)
67+
}
68+
case constants.KubeControllerManagerComponent:
69+
if cfg.KubeControllerManager != nil {
70+
commonSettings = &cfg.KubeControllerManager.CommonSettings
71+
pdbName = util.KubeControllerManagerName(name)
72+
}
73+
case constants.KarmadaSchedulerComponent:
74+
if cfg.KarmadaScheduler != nil {
75+
commonSettings = &cfg.KarmadaScheduler.CommonSettings
76+
pdbName = util.KarmadaSchedulerName(name)
77+
}
78+
case constants.KarmadaDeschedulerComponent:
79+
if cfg.KarmadaDescheduler != nil {
80+
commonSettings = &cfg.KarmadaDescheduler.CommonSettings
81+
pdbName = util.KarmadaDeschedulerName(name)
82+
}
83+
}
84+
85+
if commonSettings != nil {
86+
// Fetch the persisted Deployment to ensure UID is populated
87+
persisted, err := client.AppsV1().Deployments(namespace).Get(context.TODO(), deployment.GetName(), metav1.GetOptions{})
88+
if err != nil {
89+
return fmt.Errorf("failed to fetch Deployment %s/%s for PDB owner, err: %w", namespace, deployment.GetName(), err)
90+
}
91+
// Build OwnerReference for controller with real UID
92+
gvk := schema.GroupVersionKind{Group: "apps", Version: "v1", Kind: "Deployment"}
93+
ownerRef := *metav1.NewControllerRef(persisted, gvk)
94+
if err := pdb.EnsurePodDisruptionBudget(client, pdbName, namespace, commonSettings.PodDisruptionBudgetConfig, deployment.Spec.Template.Labels, []metav1.OwnerReference{ownerRef}); err != nil {
95+
return fmt.Errorf("failed to ensure PDB for component %s (instance: %s), err: %w", component, pdbName, err)
96+
}
97+
}
98+
5199
return nil
52100
}
53101

operator/pkg/controlplane/controlplane_test.go

Lines changed: 18 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -20,7 +20,6 @@ import (
2020
appsv1 "k8s.io/api/apps/v1"
2121
corev1 "k8s.io/api/core/v1"
2222
fakeclientset "k8s.io/client-go/kubernetes/fake"
23-
coretesting "k8s.io/client-go/testing"
2423
"k8s.io/utils/ptr"
2524

2625
operatorv1alpha1 "github.com/karmada-io/karmada/operator/pkg/apis/operator/v1alpha1"
@@ -111,19 +110,29 @@ func TestEnsureAllControlPlaneComponents(t *testing.T) {
111110
}
112111

113112
actions := fakeClient.Actions()
114-
if len(actions) != len(components) {
115-
t.Fatalf("expected %d actions, but got %d", len(components), len(actions))
113+
// We now create both deployments and PDBs, so expect 2 actions per component
114+
expectedActions := len(components) * 2
115+
if len(actions) != expectedActions {
116+
t.Fatalf("expected %d actions, but got %d", expectedActions, len(actions))
116117
}
117118

119+
// Check that we have both deployments and PDBs
120+
deploymentCount := 0
121+
pdbCount := 0
118122
for _, action := range actions {
119-
createAction, ok := action.(coretesting.CreateAction)
120-
if !ok {
121-
t.Errorf("expected CreateAction, but got %T", action)
123+
if action.GetResource().Resource == "deployments" {
124+
deploymentCount++
125+
} else if action.GetResource().Resource == "poddisruptionbudgets" {
126+
pdbCount++
122127
}
128+
}
123129

124-
if createAction.GetResource().Resource != "deployments" {
125-
t.Errorf("expected action on 'deployments', but got '%s'", createAction.GetResource().Resource)
126-
}
130+
if deploymentCount != len(components) {
131+
t.Errorf("expected %d deployment actions, but got %d", len(components), deploymentCount)
132+
}
133+
134+
if pdbCount != len(components) {
135+
t.Errorf("expected %d PDB actions, but got %d", len(components), pdbCount)
127136
}
128137
}
129138

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