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Merge pull request #2902 from alvaroaleman/ensure
⚠️ Validate controller names are unique
2 parents 242abfb + 2b94165 commit 3efd16a

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5 files changed

+105
-22
lines changed

5 files changed

+105
-22
lines changed

‎pkg/builder/controller.go

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -249,6 +249,8 @@ func (blder *TypedBuilder[request]) WithLogConstructor(logConstructor func(*requ
249249
// (underscores and alphanumeric characters only).
250250
//
251251
// By default, controllers are named using the lowercase version of their kind.
252+
//
253+
// The name must be unique as it is used to identify the controller in metrics and logs.
252254
func (blder *TypedBuilder[request]) Named(name string) *TypedBuilder[request] {
253255
blder.name = name
254256
return blder

‎pkg/builder/controller_test.go

Lines changed: 18 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -142,7 +142,7 @@ var _ = Describe("application", func() {
142142
Expect(err).NotTo(HaveOccurred())
143143

144144
instance, err := ControllerManagedBy(m).
145-
Named("my_controller").
145+
Named("my_new_controller").
146146
Build(noop)
147147
Expect(err).To(MatchError(ContainSubstring("there are no watches configured, controller will never get triggered. Use For(), Owns(), Watches() or WatchesRawSource() to set them up")))
148148
Expect(instance).To(BeNil())
@@ -154,7 +154,7 @@ var _ = Describe("application", func() {
154154
Expect(err).NotTo(HaveOccurred())
155155

156156
instance, err := ControllerManagedBy(m).
157-
Named("my_controller").
157+
Named("my_other_controller").
158158
Watches(&appsv1.ReplicaSet{}, &handler.EnqueueRequestForObject{}).
159159
Build(noop)
160160
Expect(err).NotTo(HaveOccurred())
@@ -186,6 +186,7 @@ var _ = Describe("application", func() {
186186

187187
instance, err := TypedControllerManagedBy[empty](m).
188188
For(&appsv1.ReplicaSet{}).
189+
Named("last_controller").
189190
Build(typedNoop)
190191
Expect(err).To(MatchError(ContainSubstring("For() can only be used with reconcile.Request, got builder.empty")))
191192
Expect(instance).To(BeNil())
@@ -197,7 +198,7 @@ var _ = Describe("application", func() {
197198
Expect(err).NotTo(HaveOccurred())
198199

199200
instance, err := TypedControllerManagedBy[empty](m).
200-
Named("my_controller").
201+
Named("my_controller-0").
201202
Owns(&appsv1.ReplicaSet{}).
202203
Build(typedNoop)
203204
// If we ever allow Owns() without For() we need to update the code to error
@@ -213,7 +214,7 @@ var _ = Describe("application", func() {
213214
Expect(err).NotTo(HaveOccurred())
214215

215216
instance, err := TypedControllerManagedBy[empty](m).
216-
Named("my_controller").
217+
Named("my_controller-1").
217218
WatchesRawSource(
218219
source.TypedKind(
219220
m.GetCache(),
@@ -263,6 +264,7 @@ var _ = Describe("application", func() {
263264

264265
builder := ControllerManagedBy(m).
265266
For(&appsv1.ReplicaSet{}).
267+
Named("replicaset-4").
266268
Owns(&appsv1.ReplicaSet{}).
267269
WithOptions(controller.Options{MaxConcurrentReconciles: maxConcurrentReconciles})
268270
builder.newController = newController
@@ -294,6 +296,7 @@ var _ = Describe("application", func() {
294296

295297
builder := ControllerManagedBy(m).
296298
For(&appsv1.ReplicaSet{}).
299+
Named("replicaset-3").
297300
Owns(&appsv1.ReplicaSet{})
298301
builder.newController = newController
299302

@@ -317,6 +320,7 @@ var _ = Describe("application", func() {
317320

318321
builder := ControllerManagedBy(m).
319322
For(&appsv1.ReplicaSet{}).
323+
Named("replicaset-2").
320324
Owns(&appsv1.ReplicaSet{}).
321325
WithOptions(controller.Options{RateLimiter: rateLimiter})
322326
builder.newController = newController
@@ -341,6 +345,7 @@ var _ = Describe("application", func() {
341345

342346
builder := ControllerManagedBy(m).
343347
For(&appsv1.ReplicaSet{}).
348+
Named("replicaset-0").
344349
Owns(&appsv1.ReplicaSet{}).
345350
WithLogConstructor(func(request *reconcile.Request) logr.Logger {
346351
return logr.New(logger)
@@ -358,6 +363,7 @@ var _ = Describe("application", func() {
358363

359364
builder := ControllerManagedBy(m).
360365
For(&appsv1.ReplicaSet{}).
366+
Named("replicaset-1").
361367
Owns(&appsv1.ReplicaSet{}).
362368
WithOptions(controller.Options{Reconciler: noop})
363369
instance, err := builder.Build(noop)
@@ -387,6 +393,7 @@ var _ = Describe("application", func() {
387393
By("creating the 2nd controller")
388394
ctrl2, err := ControllerManagedBy(m).
389395
For(&TestDefaultValidator{}).
396+
Named("test-default-validator-1").
390397
Owns(&appsv1.ReplicaSet{}).
391398
Build(noop)
392399
Expect(err).NotTo(HaveOccurred())
@@ -401,6 +408,7 @@ var _ = Describe("application", func() {
401408

402409
bldr := ControllerManagedBy(m).
403410
For(&appsv1.Deployment{}).
411+
Named("deployment-0").
404412
Owns(&appsv1.ReplicaSet{})
405413

406414
ctx, cancel := context.WithCancel(context.Background())
@@ -414,6 +422,7 @@ var _ = Describe("application", func() {
414422

415423
bldr := ControllerManagedBy(m).
416424
For(&appsv1.Deployment{}).
425+
Named("deployment-1").
417426
Owns(&appsv1.ReplicaSet{}, MatchEveryOwner)
418427

419428
ctx, cancel := context.WithCancel(context.Background())
@@ -443,6 +452,7 @@ var _ = Describe("application", func() {
443452

444453
bldr := ControllerManagedBy(m).
445454
Named("Deployment").
455+
Named("deployment-2").
446456
Watches( // Equivalent of For
447457
&appsv1.Deployment{}, &handler.EnqueueRequestForObject{}).
448458
Watches( // Equivalent of Owns
@@ -503,6 +513,7 @@ var _ = Describe("application", func() {
503513

504514
bldr := ControllerManagedBy(m).
505515
For(&appsv1.Deployment{}, WithPredicates(deployPrct)).
516+
Named("deployment-3").
506517
Owns(&appsv1.ReplicaSet{}, WithPredicates(replicaSetPrct)).
507518
WithEventFilter(allPrct)
508519

@@ -527,8 +538,8 @@ var _ = Describe("application", func() {
527538
})
528539

529540
It("should support multiple controllers watching the same metadata kind", func() {
530-
bldr1 := ControllerManagedBy(mgr).For(&appsv1.Deployment{}, OnlyMetadata)
531-
bldr2 := ControllerManagedBy(mgr).For(&appsv1.Deployment{}, OnlyMetadata)
541+
bldr1 := ControllerManagedBy(mgr).For(&appsv1.Deployment{}, OnlyMetadata).Named("deployment-4")
542+
bldr2 := ControllerManagedBy(mgr).For(&appsv1.Deployment{}, OnlyMetadata).Named("deployment-5")
532543

533544
ctx, cancel := context.WithCancel(context.Background())
534545
defer cancel()
@@ -541,6 +552,7 @@ var _ = Describe("application", func() {
541552

542553
bldr := ControllerManagedBy(mgr).
543554
For(&appsv1.Deployment{}, OnlyMetadata).
555+
Named("deployment-6").
544556
Owns(&appsv1.ReplicaSet{}, OnlyMetadata).
545557
Watches(&appsv1.StatefulSet{},
546558
handler.EnqueueRequestsFromMapFunc(func(ctx context.Context, o client.Object) []reconcile.Request {

‎pkg/controller/controller.go

Lines changed: 12 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -100,11 +100,15 @@ type TypedController[request comparable] interface {
100100

101101
// New returns a new Controller registered with the Manager. The Manager will ensure that shared Caches have
102102
// been synced before the Controller is Started.
103+
//
104+
// The name must be unique as it is used to identify the controller in metrics and logs.
103105
func New(name string, mgr manager.Manager, options Options) (Controller, error) {
104106
return NewTyped(name, mgr, options)
105107
}
106108

107109
// NewTyped returns a new typed controller registered with the Manager,
110+
//
111+
// The name must be unique as it is used to identify the controller in metrics and logs.
108112
func NewTyped[request comparable](name string, mgr manager.Manager, options TypedOptions[request]) (TypedController[request], error) {
109113
c, err := NewTypedUnmanaged(name, mgr, options)
110114
if err != nil {
@@ -117,11 +121,15 @@ func NewTyped[request comparable](name string, mgr manager.Manager, options Type
117121

118122
// NewUnmanaged returns a new controller without adding it to the manager. The
119123
// caller is responsible for starting the returned controller.
124+
//
125+
// The name must be unique as it is used to identify the controller in metrics and logs.
120126
func NewUnmanaged(name string, mgr manager.Manager, options Options) (Controller, error) {
121127
return NewTypedUnmanaged(name, mgr, options)
122128
}
123129

124130
// NewTypedUnmanaged returns a new typed controller without adding it to the manager.
131+
//
132+
// The name must be unique as it is used to identify the controller in metrics and logs.
125133
func NewTypedUnmanaged[request comparable](name string, mgr manager.Manager, options TypedOptions[request]) (TypedController[request], error) {
126134
if options.Reconciler == nil {
127135
return nil, fmt.Errorf("must specify Reconciler")
@@ -131,6 +139,10 @@ func NewTypedUnmanaged[request comparable](name string, mgr manager.Manager, opt
131139
return nil, fmt.Errorf("must specify Name for Controller")
132140
}
133141

142+
if err := checkName(name); err != nil {
143+
return nil, err
144+
}
145+
134146
if options.LogConstructor == nil {
135147
log := mgr.GetLogger().WithValues(
136148
"controller", name,

‎pkg/controller/controller_test.go

Lines changed: 30 additions & 16 deletions
Original file line numberDiff line numberDiff line change
@@ -60,6 +60,20 @@ var _ = Describe("controller.Controller", func() {
6060
Expect(err.Error()).To(ContainSubstring("must specify Reconciler"))
6161
})
6262

63+
It("should return an error if two controllers are registered with the same name", func() {
64+
m, err := manager.New(cfg, manager.Options{})
65+
Expect(err).NotTo(HaveOccurred())
66+
67+
c1, err := controller.New("c3", m, controller.Options{Reconciler: rec})
68+
Expect(err).NotTo(HaveOccurred())
69+
Expect(c1).ToNot(BeNil())
70+
71+
c2, err := controller.New("c3", m, controller.Options{Reconciler: rec})
72+
Expect(err).To(HaveOccurred())
73+
Expect(err.Error()).To(ContainSubstring("controller with name c3 already exists"))
74+
Expect(c2).To(BeNil())
75+
})
76+
6377
It("should not return an error if two controllers are registered with different names", func() {
6478
m, err := manager.New(cfg, manager.Options{})
6579
Expect(err).NotTo(HaveOccurred())
@@ -99,7 +113,7 @@ var _ = Describe("controller.Controller", func() {
99113
m, err := manager.New(cfg, manager.Options{})
100114
Expect(err).NotTo(HaveOccurred())
101115

102-
c, err := controller.New("new-controller", m, controller.Options{Reconciler: rec})
116+
c, err := controller.New("new-controller-0", m, controller.Options{Reconciler: rec})
103117
Expect(c.Watch(watch)).To(Succeed())
104118
Expect(err).NotTo(HaveOccurred())
105119

@@ -125,7 +139,7 @@ var _ = Describe("controller.Controller", func() {
125139
m, err := manager.New(cfg, manager.Options{})
126140
Expect(err).NotTo(HaveOccurred())
127141

128-
_, err = controller.New("new-controller", m, controller.Options{Reconciler: rec})
142+
_, err = controller.New("new-controller-1", m, controller.Options{Reconciler: rec})
129143
Expect(err).NotTo(HaveOccurred())
130144

131145
// force-close keep-alive connections. These'll time anyway (after
@@ -138,7 +152,7 @@ var _ = Describe("controller.Controller", func() {
138152
m, err := manager.New(cfg, manager.Options{})
139153
Expect(err).NotTo(HaveOccurred())
140154

141-
c, err := controller.New("new-controller", m, controller.Options{
155+
c, err := controller.New("new-controller-2", m, controller.Options{
142156
Reconciler: reconcile.Func(nil),
143157
})
144158
Expect(err).NotTo(HaveOccurred())
@@ -161,7 +175,7 @@ var _ = Describe("controller.Controller", func() {
161175
return nil
162176
}
163177

164-
c, err := controller.New("new-controller", m, controller.Options{
178+
c, err := controller.New("new-controller-3", m, controller.Options{
165179
Reconciler: reconcile.Func(nil),
166180
RateLimiter: customRateLimiter,
167181
NewQueue: customNewQueue,
@@ -180,7 +194,7 @@ var _ = Describe("controller.Controller", func() {
180194
m, err := manager.New(cfg, manager.Options{Controller: config.Controller{RecoverPanic: ptr.To(true)}})
181195
Expect(err).NotTo(HaveOccurred())
182196

183-
c, err := controller.New("new-controller", m, controller.Options{
197+
c, err := controller.New("new-controller-4", m, controller.Options{
184198
Reconciler: reconcile.Func(nil),
185199
})
186200
Expect(err).NotTo(HaveOccurred())
@@ -213,7 +227,7 @@ var _ = Describe("controller.Controller", func() {
213227
m, err := manager.New(cfg, manager.Options{Controller: config.Controller{NeedLeaderElection: ptr.To(true)}})
214228
Expect(err).NotTo(HaveOccurred())
215229

216-
c, err := controller.New("new-controller", m, controller.Options{
230+
c, err := controller.New("new-controller-5", m, controller.Options{
217231
Reconciler: reconcile.Func(nil),
218232
})
219233
Expect(err).NotTo(HaveOccurred())
@@ -228,7 +242,7 @@ var _ = Describe("controller.Controller", func() {
228242
m, err := manager.New(cfg, manager.Options{Controller: config.Controller{NeedLeaderElection: ptr.To(true)}})
229243
Expect(err).NotTo(HaveOccurred())
230244

231-
c, err := controller.New("new-controller", m, controller.Options{
245+
c, err := controller.New("new-controller-6", m, controller.Options{
232246
NeedLeaderElection: ptr.To(false),
233247
Reconciler: reconcile.Func(nil),
234248
})
@@ -244,7 +258,7 @@ var _ = Describe("controller.Controller", func() {
244258
m, err := manager.New(cfg, manager.Options{Controller: config.Controller{MaxConcurrentReconciles: 5}})
245259
Expect(err).NotTo(HaveOccurred())
246260

247-
c, err := controller.New("new-controller", m, controller.Options{
261+
c, err := controller.New("new-controller-7", m, controller.Options{
248262
Reconciler: reconcile.Func(nil),
249263
})
250264
Expect(err).NotTo(HaveOccurred())
@@ -259,7 +273,7 @@ var _ = Describe("controller.Controller", func() {
259273
m, err := manager.New(cfg, manager.Options{})
260274
Expect(err).NotTo(HaveOccurred())
261275

262-
c, err := controller.New("new-controller", m, controller.Options{
276+
c, err := controller.New("new-controller-8", m, controller.Options{
263277
Reconciler: reconcile.Func(nil),
264278
})
265279
Expect(err).NotTo(HaveOccurred())
@@ -274,7 +288,7 @@ var _ = Describe("controller.Controller", func() {
274288
m, err := manager.New(cfg, manager.Options{})
275289
Expect(err).NotTo(HaveOccurred())
276290

277-
c, err := controller.New("new-controller", m, controller.Options{
291+
c, err := controller.New("new-controller-9", m, controller.Options{
278292
Reconciler: reconcile.Func(nil),
279293
MaxConcurrentReconciles: 5,
280294
})
@@ -290,7 +304,7 @@ var _ = Describe("controller.Controller", func() {
290304
m, err := manager.New(cfg, manager.Options{Controller: config.Controller{CacheSyncTimeout: 5}})
291305
Expect(err).NotTo(HaveOccurred())
292306

293-
c, err := controller.New("new-controller", m, controller.Options{
307+
c, err := controller.New("new-controller-10", m, controller.Options{
294308
Reconciler: reconcile.Func(nil),
295309
})
296310
Expect(err).NotTo(HaveOccurred())
@@ -305,7 +319,7 @@ var _ = Describe("controller.Controller", func() {
305319
m, err := manager.New(cfg, manager.Options{})
306320
Expect(err).NotTo(HaveOccurred())
307321

308-
c, err := controller.New("new-controller", m, controller.Options{
322+
c, err := controller.New("new-controller-11", m, controller.Options{
309323
Reconciler: reconcile.Func(nil),
310324
})
311325
Expect(err).NotTo(HaveOccurred())
@@ -320,7 +334,7 @@ var _ = Describe("controller.Controller", func() {
320334
m, err := manager.New(cfg, manager.Options{})
321335
Expect(err).NotTo(HaveOccurred())
322336

323-
c, err := controller.New("new-controller", m, controller.Options{
337+
c, err := controller.New("new-controller-12", m, controller.Options{
324338
Reconciler: reconcile.Func(nil),
325339
CacheSyncTimeout: 5,
326340
})
@@ -336,7 +350,7 @@ var _ = Describe("controller.Controller", func() {
336350
m, err := manager.New(cfg, manager.Options{})
337351
Expect(err).NotTo(HaveOccurred())
338352

339-
c, err := controller.New("new-controller", m, controller.Options{
353+
c, err := controller.New("new-controller-13", m, controller.Options{
340354
Reconciler: rec,
341355
})
342356
Expect(err).NotTo(HaveOccurred())
@@ -351,7 +365,7 @@ var _ = Describe("controller.Controller", func() {
351365
m, err := manager.New(cfg, manager.Options{})
352366
Expect(err).NotTo(HaveOccurred())
353367

354-
c, err := controller.New("new-controller", m, controller.Options{
368+
c, err := controller.New("new-controller-14", m, controller.Options{
355369
NeedLeaderElection: ptr.To(false),
356370
Reconciler: rec,
357371
})
@@ -367,7 +381,7 @@ var _ = Describe("controller.Controller", func() {
367381
m, err := manager.New(cfg, manager.Options{})
368382
Expect(err).NotTo(HaveOccurred())
369383

370-
c, err := controller.New("new-controller", m, controller.Options{
384+
c, err := controller.New("new-controller-15", m, controller.Options{
371385
Reconciler: rec,
372386
})
373387
Expect(err).NotTo(HaveOccurred())

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