| 1 | package host |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "context" |
| 6 | "log" |
| 7 | "net/http" |
| 8 | "net/http/httptest" |
| 9 | "reflect" |
| 10 | "runtime" |
| 11 | "strings" |
| 12 | "sync" |
| 13 | "testing" |
| 14 | "time" |
| 15 | |
| 16 | "github.com/carlosframework/platform/internal/activator" |
| 17 | "github.com/carlosframework/platform/internal/registry" |
| 18 | "github.com/carlosframework/platform/internal/release" |
| 19 | ) |
| 20 | |
| 21 | // The stamp is the whole licence for skipping the sweep's grace: it is written |
| 22 | // only after the adopting pass is finished with the host. A drift whose route |
| 23 | // is still stamped with the old version is an adoption in flight, and one with |
| 24 | // no row at all is not a route this box adopts. |
| 25 | func TestConvergeAdoptedCyclesOnlyWhenTheStampAgrees(t *testing.T) { |
| 26 | rows := map[string]*registry.Route{ |
| 27 | "done.test": {Host: "done.test", Version: "v2"}, |
| 28 | "inflight.test": {Host: "inflight.test", Version: "v1"}, |
| 29 | "named.test": {Host: "named.test", Version: "v2", Unit: "console.service"}, |
| 30 | "unitback.test": {Host: "unitback.test", Version: "v2", Backing: registry.BackingUnit}, |
| 31 | } |
| 32 | drifted := func() map[string]string { |
| 33 | return map[string]string{ |
| 34 | "done.test": "v2", "inflight.test": "v2", "named.test": "v2", |
| 35 | "unitback.test": "v2", "norow.test": "v2", |
| 36 | } |
| 37 | } |
| 38 | var cycled []string |
| 39 | n := convergeAdopted(drifted, |
| 40 | func(h string) (*registry.Route, error) { return rows[h], nil }, |
| 41 | func(h, ver string) bool { cycled = append(cycled, h+"@"+ver); return true }, 10) |
| 42 | if want := []string{"done.test@v2"}; !reflect.DeepEqual(cycled, want) { |
| 43 | t.Fatalf("cycled = %v, want %v", cycled, want) |
| 44 | } |
| 45 | if n != 1 { |
| 46 | t.Fatalf("convergeAdopted = %d, want 1", n) |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | // The ordinary tick, where nothing has shipped, must cost no registry read: |
| 51 | // this leg runs every two seconds on every box. |
| 52 | func TestConvergeAdoptedReadsNoRouteWhenNothingDrifted(t *testing.T) { |
| 53 | n := convergeAdopted(func() map[string]string { return nil }, |
| 54 | func(h string) (*registry.Route, error) { |
| 55 | t.Fatalf("read the route for %s with nothing drifted", h) |
| 56 | return nil, nil |
| 57 | }, |
| 58 | func(h, ver string) bool { |
| 59 | t.Fatalf("cycled %s with nothing drifted", h) |
| 60 | return false |
| 61 | }, 10) |
| 62 | if n != 0 { |
| 63 | t.Fatalf("convergeAdopted = %d, want 0", n) |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | // The leg runs on its own loop, never waiting on the fast tick: a tick that |
| 68 | // takes a full reconcile and adopt pass can run tens of seconds, and a |
| 69 | // stamped adoption must not wait behind it. Here the loop keeps calling the |
| 70 | // leg on its own cadence, and stops when told. |
| 71 | func TestConvergeLoopRunsTheLegOnItsOwnCadence(t *testing.T) { |
| 72 | t.Parallel() |
| 73 | calls := make(chan struct{}, 100) |
| 74 | stop := make(chan struct{}) |
| 75 | done := make(chan struct{}) |
| 76 | go func() { |
| 77 | runConvergeLoop(func() { calls <- struct{}{} }, 5*time.Millisecond, stop) |
| 78 | close(done) |
| 79 | }() |
| 80 | for i := 0; i < 3; i++ { |
| 81 | select { |
| 82 | case <-calls: |
| 83 | case <-time.After(10 * time.Second): |
| 84 | t.Fatalf("the loop ran the leg %d times, want it to keep running", i) |
| 85 | } |
| 86 | } |
| 87 | close(stop) |
| 88 | select { |
| 89 | case <-done: |
| 90 | case <-time.After(10 * time.Second): |
| 91 | t.Fatal("the loop did not stop") |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | // The production sequence behind discussion #231, with the real pass on both |
| 96 | // sides. The agent cannot write the version store, so the ROOT pass adopts a |
| 97 | // new release for a warm exec instance: it stages, repoints and stamps, and — |
| 98 | // having no handle on the agent's children — cycles nothing. The agent's own |
| 99 | // pass then finds the host up to date and never reaches its restart callback. |
| 100 | // Before the converge leg, that left the child on the old build until the |
| 101 | // activator sweep's 90s grace ran out. |
| 102 | func TestRootAdoptionOfAWarmExecInstanceIsFinishedByTheAgent(t *testing.T) { |
| 103 | env := newFastFixture(t) |
| 104 | ctx := context.Background() |
| 105 | plat := runtime.GOOS + "-" + runtime.GOARCH |
| 106 | host := "warm.test" |
| 107 | ship := func(ver string) { |
| 108 | t.Helper() |
| 109 | m := release.Manifest{ |
| 110 | App: "fastapp", Version: ver, Kind: "binary", |
| 111 | Artifacts: map[string]release.Artifact{plat: {}}, |
| 112 | } |
| 113 | if err := release.Ship(ctx, env.store, "bab", m, map[string][]byte{plat: []byte("build " + ver)}); err != nil { |
| 114 | t.Fatalf("Ship %s: %v", ver, err) |
| 115 | } |
| 116 | if err := release.Promote(ctx, env.store, env.priv, "bab", "fastapp", "edge", ver); err != nil { |
| 117 | t.Fatalf("Promote %s: %v", ver, err) |
| 118 | } |
| 119 | } |
| 120 | // rootRestartRoute with systemctl stubbed out: same dispatch, bounce nil. |
| 121 | rootPass := func() { |
| 122 | t.Helper() |
| 123 | restart := makeRestartRoute(env.reg, func(string) {}, unitOnly(func(string) error { return nil }), nil) |
| 124 | if err := release.Pass(ctx, env.reg, env.store, env.pub, env.optDir, restart, release.BakeDir(env.dataDir)); err != nil { |
| 125 | t.Fatalf("root pass: %v", err) |
| 126 | } |
| 127 | } |
| 128 | if err := env.reg.Upsert(registry.Route{ |
| 129 | Host: host, Kind: "instance", App: "fastapp", Channel: "edge", |
| 130 | Status: "ready", Hibernate: true, |
| 131 | }); err != nil { |
| 132 | t.Fatalf("upsert: %v", err) |
| 133 | } |
| 134 | |
| 135 | ship("v1") |
| 136 | rootPass() |
| 137 | spawned := "v1" // the awake child's build: frozen at exec, as the activator records it |
| 138 | |
| 139 | ship("v2") |
| 140 | rootPass() |
| 141 | if v, err := release.LiveVersion(env.optDir, host); err != nil || v != "v2" { |
| 142 | t.Fatalf("live = %q, %v after the root pass; want v2", v, err) |
| 143 | } |
| 144 | if rt, err := env.reg.Get(host); err != nil || rt == nil || rt.Version != "v2" { |
| 145 | t.Fatalf("route = %+v, %v after the root pass; want it stamped v2", rt, err) |
| 146 | } |
| 147 | |
| 148 | // The agent's tick. Its pass has a bounce to offer and never gets to use |
| 149 | // it: the host is already up to date. |
| 150 | var bounced, cycled []string |
| 151 | restart := makeRestartRoute(env.reg, func(string) {}, unitOnly(func(string) error { return nil }), |
| 152 | func(h string) bool { bounced = append(bounced, h); return true }) |
| 153 | d := env.deps(nil) |
| 154 | d.restart = restart |
| 155 | d.passOpts = fastPassOpts(env.dataDir, func(string, string, error) {}, restart, nil) |
| 156 | d.fullPass = func(ctx context.Context) { |
| 157 | if err := release.Pass(ctx, d.reg, d.store, d.pub, d.optDir, d.restart, d.passOpts...); err != nil { |
| 158 | t.Fatalf("agent pass: %v", err) |
| 159 | } |
| 160 | } |
| 161 | leg := func() { |
| 162 | convergeAdopted( |
| 163 | func() map[string]string { |
| 164 | live, _ := release.LiveVersion(env.optDir, host) |
| 165 | if live == "" || live == spawned { |
| 166 | return nil |
| 167 | } |
| 168 | return map[string]string{host: live} |
| 169 | }, |
| 170 | env.reg.Get, |
| 171 | func(h, ver string) bool { cycled = append(cycled, h+"@"+ver); spawned = ver; return true }, |
| 172 | adoptedCyclesPerTick) |
| 173 | } |
| 174 | now := time.Unix(1754640000, 0) |
| 175 | fastTick(ctx, d, now) // seeds the serial |
| 176 | if err := release.BumpSerial(ctx, env.store, now); err != nil { |
| 177 | t.Fatalf("BumpSerial: %v", err) |
| 178 | } |
| 179 | fastTick(ctx, d, now.Add(10*time.Second)) // the serial move: the agent's full pass |
| 180 | leg() // the converge loop's next run |
| 181 | |
| 182 | if len(bounced) != 0 { |
| 183 | t.Fatalf("the agent's pass bounced %v — it found the host already adopted, so this test no longer models the gap", bounced) |
| 184 | } |
| 185 | if want := []string{host + "@v2"}; !reflect.DeepEqual(cycled, want) { |
| 186 | t.Fatalf("cycled = %v, want %v: the warm child is still on v1 under a symlink and a stamp that both say v2", cycled, want) |
| 187 | } |
| 188 | leg() |
| 189 | if len(cycled) != 1 { |
| 190 | t.Fatalf("cycled again on the next tick: %v", cycled) |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | // One pass can adopt every warm instance of an app inside a few seconds. |
| 195 | // Stopping them all on one tick would blip every host of the app at the same |
| 196 | // moment; the leg spends its budget in host order and leaves the rest for the |
| 197 | // ticks that follow. A drifted host it has to wait on costs the others nothing. |
| 198 | func TestConvergeAdoptedCyclesOnePerTickInHostOrder(t *testing.T) { |
| 199 | spawned := map[string]string{"a.test": "v1", "b.test": "v1", "c.test": "v1", "wait.test": "v1"} |
| 200 | stamp := map[string]string{"a.test": "v2", "b.test": "v2", "c.test": "v2", "wait.test": "v1"} |
| 201 | drifted := func() map[string]string { |
| 202 | out := map[string]string{} |
| 203 | for h, v := range spawned { |
| 204 | if v != "v2" { |
| 205 | out[h] = "v2" |
| 206 | } |
| 207 | } |
| 208 | return out |
| 209 | } |
| 210 | get := func(h string) (*registry.Route, error) { return ®istry.Route{Host: h, Version: stamp[h]}, nil } |
| 211 | var cycled []string |
| 212 | converge := func(h, ver string) bool { cycled = append(cycled, h); spawned[h] = ver; return true } |
| 213 | |
| 214 | for tick := 1; tick <= 4; tick++ { |
| 215 | if n := convergeAdopted(drifted, get, converge, adoptedCyclesPerTick); tick <= 3 && n != 1 { |
| 216 | t.Fatalf("tick %d cycled %d, want 1", tick, n) |
| 217 | } |
| 218 | } |
| 219 | if want := []string{"a.test", "b.test", "c.test"}; !reflect.DeepEqual(cycled, want) { |
| 220 | t.Fatalf("cycled = %v, want %v: one per tick, in host order, never the host whose stamp does not agree", cycled, want) |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | // versionedBackend is activator.Backend with the one thing convergence needs |
| 225 | // and fakeWakeBackend does not model: a child that knows which build it was |
| 226 | // exec'd from, read off the SAME live symlink the release pass writes. It |
| 227 | // binds no socket — the caller supplies the proxy — so it runs anywhere. |
| 228 | type versionedBackend struct { |
| 229 | fakeWakeBackend |
| 230 | optDir string |
| 231 | |
| 232 | mu sync.Mutex |
| 233 | starts []string // the build each spawn exec'd, in order |
| 234 | } |
| 235 | |
| 236 | type flagProc struct { |
| 237 | mu sync.Mutex |
| 238 | stopped bool |
| 239 | } |
| 240 | |
| 241 | func (p *flagProc) Stop(context.Context) error { |
| 242 | p.mu.Lock() |
| 243 | p.stopped = true |
| 244 | p.mu.Unlock() |
| 245 | return nil |
| 246 | } |
| 247 | |
| 248 | func (p *flagProc) Exited() bool { |
| 249 | p.mu.Lock() |
| 250 | defer p.mu.Unlock() |
| 251 | return p.stopped |
| 252 | } |
| 253 | |
| 254 | func (b *versionedBackend) LiveVersion(host string) (string, error) { |
| 255 | return release.LiveVersion(b.optDir, host) |
| 256 | } |
| 257 | |
| 258 | func (b *versionedBackend) Start(_ context.Context, rt registry.Route) (activator.Proc, string, error) { |
| 259 | ver, err := release.LiveVersion(b.optDir, rt.Host) |
| 260 | if err != nil { |
| 261 | return nil, "", err |
| 262 | } |
| 263 | b.mu.Lock() |
| 264 | b.starts = append(b.starts, ver) |
| 265 | b.mu.Unlock() |
| 266 | return &flagProc{}, ver, nil |
| 267 | } |
| 268 | |
| 269 | func (b *versionedBackend) started() []string { |
| 270 | b.mu.Lock() |
| 271 | defer b.mu.Unlock() |
| 272 | return append([]string(nil), b.starts...) |
| 273 | } |
| 274 | |
| 275 | // The whole of discussion #231 with nothing stood in for: the real release |
| 276 | // pass as root runs it, a real activator owning the child, and the leg exactly |
| 277 | // as fastConvergeLoop builds it (convergeLegFor). The sweeper is never |
| 278 | // started, so the ONLY thing that can cycle the instance is the leg — a 90s |
| 279 | // grace cannot rescue this test. |
| 280 | func TestConvergeLegCyclesARootAdoptedInstanceOnARealActivator(t *testing.T) { |
| 281 | t.Parallel() |
| 282 | env := newFastFixture(t) |
| 283 | ctx := context.Background() |
| 284 | plat := runtime.GOOS + "-" + runtime.GOARCH |
| 285 | host := "warm.test" |
| 286 | rt := registry.Route{ |
| 287 | Host: host, Kind: "instance", App: "fastapp", Channel: "edge", |
| 288 | Status: "ready", Hibernate: true, |
| 289 | } |
| 290 | if err := env.reg.Upsert(rt); err != nil { |
| 291 | t.Fatalf("upsert: %v", err) |
| 292 | } |
| 293 | adopt := func(ver string) { |
| 294 | t.Helper() |
| 295 | m := release.Manifest{ |
| 296 | App: "fastapp", Version: ver, Kind: "binary", |
| 297 | Artifacts: map[string]release.Artifact{plat: {}}, |
| 298 | } |
| 299 | if err := release.Ship(ctx, env.store, "bab", m, map[string][]byte{plat: []byte("build " + ver)}); err != nil { |
| 300 | t.Fatalf("Ship %s: %v", ver, err) |
| 301 | } |
| 302 | if err := release.Promote(ctx, env.store, env.priv, "bab", "fastapp", "edge", ver); err != nil { |
| 303 | t.Fatalf("Promote %s: %v", ver, err) |
| 304 | } |
| 305 | // The root pass: rootRestartRoute's dispatch (bounce nil), systemctl stubbed. |
| 306 | restart := makeRestartRoute(env.reg, func(string) {}, unitOnly(func(string) error { return nil }), nil) |
| 307 | if err := release.Pass(ctx, env.reg, env.store, env.pub, env.optDir, restart, release.BakeDir(env.dataDir)); err != nil { |
| 308 | t.Fatalf("root pass for %s: %v", ver, err) |
| 309 | } |
| 310 | } |
| 311 | backend := &versionedBackend{optDir: env.optDir} |
| 312 | svc := activator.New(activator.Config{Bucket: "test-bucket", Idle: time.Hour}, backend, env.reg) |
| 313 | t.Cleanup(func() { |
| 314 | sctx, cancel := context.WithTimeout(context.Background(), 10*time.Second) |
| 315 | defer cancel() |
| 316 | svc.Shutdown(sctx) |
| 317 | }) |
| 318 | request := func() { |
| 319 | t.Helper() |
| 320 | rec := httptest.NewRecorder() |
| 321 | proxy := http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) { w.WriteHeader(http.StatusNoContent) }) |
| 322 | if !svc.ServeHTTP(rec, httptest.NewRequest("GET", "http://"+host+"/", nil), rt, proxy) { |
| 323 | t.Fatal("the activator did not take the request") |
| 324 | } |
| 325 | if rec.Code != http.StatusNoContent { |
| 326 | t.Fatalf("request = %d, want 204", rec.Code) |
| 327 | } |
| 328 | } |
| 329 | leg := convergeLegFor(svc, env.reg) |
| 330 | if leg == nil { |
| 331 | t.Fatal("convergeLegFor returned no leg for a box with an activator") |
| 332 | } |
| 333 | |
| 334 | // "Was it stopped?" is asked of the spawn count, after a request: Owns |
| 335 | // stays true while an entry drains, so it cannot tell a spared child from |
| 336 | // one being stopped. A request against a stopped instance spawns again. |
| 337 | adopt("v1") |
| 338 | request() // wakes the instance onto v1 |
| 339 | leg() |
| 340 | request() |
| 341 | if got, want := backend.started(), []string{"v1"}; !reflect.DeepEqual(got, want) { |
| 342 | t.Fatalf("spawned builds = %v, want %v: the leg stopped an instance whose build is the adopted one", got, want) |
| 343 | } |
| 344 | |
| 345 | adopt("v2") // root: staged, repointed, stamped — and nothing cycled |
| 346 | if !svc.Owns(host) { |
| 347 | t.Fatal("the root pass stopped the agent's child — this test no longer models the gap") |
| 348 | } |
| 349 | leg() |
| 350 | deadline := time.Now().Add(10 * time.Second) |
| 351 | for svc.Owns(host) { |
| 352 | if time.Now().After(deadline) { |
| 353 | t.Fatal("the warm instance is still running v1 after the leg: it was adopted onto v2 and nothing cycled it") |
| 354 | } |
| 355 | time.Sleep(5 * time.Millisecond) |
| 356 | } |
| 357 | |
| 358 | request() // the next request wakes it onto v2 |
| 359 | if got, want := backend.started(), []string{"v1", "v2"}; !reflect.DeepEqual(got, want) { |
| 360 | t.Fatalf("spawned builds = %v, want %v", got, want) |
| 361 | } |
| 362 | leg() |
| 363 | request() |
| 364 | if got, want := backend.started(), []string{"v1", "v2"}; !reflect.DeepEqual(got, want) { |
| 365 | t.Fatalf("spawned builds = %v, want %v: the leg cycled the instance again after it had converged", got, want) |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | func TestConvergeLegForABoxWithNoActivator(t *testing.T) { |
| 370 | if convergeLegFor(nil, nil) != nil { |
| 371 | t.Fatal("convergeLegFor built a leg with no activator to ask") |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | // The adopt passes' restart dispatch must be built on adoptBounceFn, not |
| 376 | // bounceFn. With the converge leg in place an instance can already be on the |
| 377 | // new build when a slower pass reaches its own restart; the plain Bounce would |
| 378 | // stop that replacement for nothing. A stale child still gets its cycle. |
| 379 | func TestAdoptRestartDispatchSparesAConvergedChild(t *testing.T) { |
| 380 | env := newFastFixture(t) |
| 381 | host := "warm.test" |
| 382 | rt := registry.Route{ |
| 383 | Host: host, Kind: "instance", App: "fastapp", Channel: "edge", |
| 384 | Status: "ready", Hibernate: true, |
| 385 | } |
| 386 | if err := env.reg.Upsert(rt); err != nil { |
| 387 | t.Fatalf("upsert: %v", err) |
| 388 | } |
| 389 | env.stageLive(t, host, "v1") |
| 390 | backend := &versionedBackend{optDir: env.optDir} |
| 391 | svc := activator.New(activator.Config{Bucket: "test-bucket", Idle: time.Hour}, backend, env.reg) |
| 392 | t.Cleanup(func() { |
| 393 | sctx, cancel := context.WithTimeout(context.Background(), 10*time.Second) |
| 394 | defer cancel() |
| 395 | svc.Shutdown(sctx) |
| 396 | }) |
| 397 | wake := func() { |
| 398 | t.Helper() |
| 399 | rec := httptest.NewRecorder() |
| 400 | proxy := http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) { w.WriteHeader(http.StatusNoContent) }) |
| 401 | if !svc.ServeHTTP(rec, httptest.NewRequest("GET", "http://"+host+"/", nil), rt, proxy) || rec.Code != http.StatusNoContent { |
| 402 | t.Fatalf("wake request = %d", rec.Code) |
| 403 | } |
| 404 | } |
| 405 | restart := makeRestartRoute(env.reg, func(string) {}, unitOnly(func(u string) error { |
| 406 | t.Fatalf("named-unit arm fired for %q on a route that names no unit", u) |
| 407 | return nil |
| 408 | }), adoptBounceFn(svc)) |
| 409 | |
| 410 | // Asked of the spawn count, after a request — see the note in |
| 411 | // TestConvergeLegCyclesARootAdoptedInstanceOnARealActivator. |
| 412 | wake() // exec'd from v1, and live/<host> names v1 |
| 413 | if err := restart(host); err != nil { |
| 414 | t.Fatalf("restart: %v", err) |
| 415 | } |
| 416 | wake() |
| 417 | if got, want := backend.started(), []string{"v1"}; !reflect.DeepEqual(got, want) { |
| 418 | t.Fatalf("spawned builds = %v, want %v: the adopt dispatch stopped a child already running the build live/<host> names", got, want) |
| 419 | } |
| 420 | |
| 421 | env.stageLive(t, host, "v2") // the symlink moves under the running child |
| 422 | if err := restart(host); err != nil { |
| 423 | t.Fatalf("restart: %v", err) |
| 424 | } |
| 425 | wake() |
| 426 | if got, want := backend.started(), []string{"v1", "v2"}; !reflect.DeepEqual(got, want) { |
| 427 | t.Fatalf("spawned builds = %v, want %v: the adopt dispatch left a stale child running", got, want) |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | // A leg past slowLegAfter says so in the journal, with what it was doing; a |
| 432 | // quick one says nothing, because the fast loop runs every two seconds. |
| 433 | func TestLogSlowSpeaksOnlyWhenSlow(t *testing.T) { |
| 434 | var buf bytes.Buffer |
| 435 | prev, flags := log.Writer(), log.Flags() |
| 436 | log.SetOutput(&buf) |
| 437 | log.SetFlags(0) |
| 438 | t.Cleanup(func() { log.SetOutput(prev); log.SetFlags(flags) }) |
| 439 | |
| 440 | logSlow("fast sweep", time.Now(), "3 routes") |
| 441 | if buf.Len() != 0 { |
| 442 | t.Fatalf("a quick leg logged %q", buf.String()) |
| 443 | } |
| 444 | logSlow("serial pass stages", time.Now().Add(-2*slowLegAfter), "reconcile 9.0s, adopt 1.0s") |
| 445 | got := buf.String() |
| 446 | for _, want := range []string{"serial pass stages took 10", "(reconcile 9.0s, adopt 1.0s)"} { |
| 447 | if !strings.Contains(got, want) { |
| 448 | t.Fatalf("slow-leg line %q lacks %q", got, want) |
| 449 | } |
| 450 | } |
| 451 | } |
| 452 | |
| 453 | // The point of the leg's own loop: it acts while the fast tick is stuck in a |
| 454 | // long full pass. The pass is held open here until the leg has cycled the |
| 455 | // drifted instance, which it could never do if it still rode the tick. |
| 456 | func TestConvergeLoopActsWhileTheFullPassIsBusy(t *testing.T) { |
| 457 | env := newFastFixture(t) |
| 458 | d := env.deps(nil) |
| 459 | inPass, unblock := make(chan struct{}), make(chan struct{}) |
| 460 | d.fullPass = func(context.Context) { close(inPass); <-unblock } |
| 461 | |
| 462 | cycled := make(chan string, 1) |
| 463 | leg := func() { |
| 464 | convergeAdopted( |
| 465 | func() map[string]string { return map[string]string{"warm.test": "v2"} }, |
| 466 | func(h string) (*registry.Route, error) { return ®istry.Route{Host: h, Version: "v2"}, nil }, |
| 467 | func(h, ver string) bool { |
| 468 | select { |
| 469 | case cycled <- h + "@" + ver: |
| 470 | default: |
| 471 | } |
| 472 | return true |
| 473 | }, |
| 474 | adoptedCyclesPerTick) |
| 475 | } |
| 476 | ctx := context.Background() |
| 477 | now := time.Unix(1754640000, 0) |
| 478 | fastTick(ctx, d, now) // seeds the serial |
| 479 | if err := release.BumpSerial(ctx, env.store, now); err != nil { |
| 480 | t.Fatalf("BumpSerial: %v", err) |
| 481 | } |
| 482 | tickDone := make(chan struct{}) |
| 483 | go func() { fastTick(ctx, d, now.Add(10*time.Second)); close(tickDone) }() |
| 484 | <-inPass // the tick is now stuck in its full pass |
| 485 | // Started only now, so anything it cycles was cycled DURING the pass. |
| 486 | stop := make(chan struct{}) |
| 487 | defer close(stop) |
| 488 | go runConvergeLoop(leg, 5*time.Millisecond, stop) |
| 489 | |
| 490 | select { |
| 491 | case got := <-cycled: |
| 492 | if got != "warm.test@v2" { |
| 493 | t.Fatalf("cycled %q", got) |
| 494 | } |
| 495 | case <-time.After(10 * time.Second): |
| 496 | t.Fatal("the converge leg waited for the full pass") |
| 497 | } |
| 498 | close(unblock) |
| 499 | <-tickDone |
| 500 | } |
| 501 | |
amadan