carlos / platform Public

Download this file

1	package activator
2
3	import (
4	"context"
5	"errors"
6	"net/http"
7	"net/http/httptest"
8	"testing"
9	"time"
10
11	"github.com/carlosframework/platform/internal/registry"
12	)
13
14	func TestStartupWaitUsesWakeTimeoutResponse(t *testing.T) {
15	old := wakeWaitBound
16	wakeWaitBound = 20 * time.Millisecond
17	t.Cleanup(func() { wakeWaitBound = old })
18	a := New(Config{}, &fakeBackend{}, nil)
19	a.Startup = make(chan struct{})
20	defer a.lifeStop()
21	rt := registry.Route{Host: "shop.example.com", Kind: "instance", Hibernate: true}
22	w := httptest.NewRecorder()
23	a.ServeHTTP(w, httptest.NewRequest(http.MethodGet, "http://shop.example.com/", nil), rt, http.NotFoundHandler())
24	if w.Code != http.StatusServiceUnavailable || w.Header().Get("Retry-After") != "5" || w.Body.String() != "instance is waking; retry shortly\n" {
25	t.Fatalf("startup timeout: %d, %v, %q", w.Code, w.Header(), w.Body.String())
26	}
27	if a.Owns(rt.Host) {
28	t.Fatal("timed-out request created a wake")
29	}
30	}
31
32	func TestStartupBlocksWorkerAndSidecarAdmission(t *testing.T) {
33	old := wakeWaitBound
34	wakeWaitBound = 20 * time.Millisecond
35	t.Cleanup(func() { wakeWaitBound = old })
36	a := New(Config{}, &fakeBackend{}, nil)
37	a.Startup = make(chan struct{})
38	defer a.lifeStop()
39	rt := registry.Route{Host: "shop.example.com", Kind: "instance", Hibernate: true}
40	if err := a.WakeWorker(rt); !errors.Is(err, errWakeTimeout) {
41	t.Fatalf("worker: %v", err)
42	}
43	if err := a.BeginSidecarRequest(t.Context(), rt); !errors.Is(err, errWakeTimeout) {
44	t.Fatalf("sidecar: %v", err)
45	}
46	ctx, cancel := context.WithCancel(t.Context())
47	cancel()
48	if _, err := a.begin(ctx, rt, true); !errors.Is(err, context.Canceled) {
49	t.Fatalf("cancelled request: %v", err)
50	}
51	if a.Owns(rt.Host) {
52	t.Fatal("startup admission created a wake")
53	}
54	}
55
56	func TestStartupShutdownAnswersServiceUnavailable(t *testing.T) {
57	for _, ready := range []bool{false, true} {
58	t.Run(map[bool]string{false: "held", true: "released"}[ready], func(t *testing.T) {
59	a := New(Config{}, &fakeBackend{}, nil)
60	started := make(chan struct{})
61	a.Startup = started
62	if ready {
63	close(started)
64	}
65	a.Shutdown(t.Context())
66	rt := registry.Route{Host: "shop.example.com", Kind: "instance", Hibernate: true}
67	w := httptest.NewRecorder()
68	a.ServeHTTP(w, httptest.NewRequest(http.MethodGet, "http://shop.example.com/", nil), rt, http.NotFoundHandler())
69	if w.Code != http.StatusServiceUnavailable {
70	t.Fatalf("service shutdown answered %d: %q", w.Code, w.Body.String())
71	}
72	if a.Owns(rt.Host) {
73	t.Fatal("shutdown request created a wake")
74	}
75	})
76	}
77	}
78
79	type startupRoutes map[string]registry.Route
80
81	func (s startupRoutes) Get(host string) (*registry.Route, error) {
82	rt, ok := s[host]
83	if !ok {
84	return nil, nil
85	}
86	return &rt, nil
87	}
88
89	// A request held through startup carries the proxy the edge chose before
90	// recovery ran. When recovery moved the host's socket, it is answered as a
91	// wake in progress, so the retry is routed afresh, never sent to the old
92	// socket.
93	func TestStartupHeldRequestRefusesStaleUpstream(t *testing.T) {
94	t.Parallel()
95	for _, moved := range []bool{false, true} {
96	a := New(Config{}, &fakeBackend{}, nil)
97	ready := make(chan struct{})
98	a.Startup = ready
99	rt := registry.Route{Host: "shop.example.com", Kind: "instance", Hibernate: true, Socket: "/run/carlos/shop.example.com.sock"}
100	fresh := rt
101	if moved {
102	fresh.Socket = "/run/carlos/instances/shop.example.com/app.sock"
103	}
104	a.Routes = startupRoutes{rt.Host: fresh}
105	proxied := false
106	proxy := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { proxied = true })
107	w := httptest.NewRecorder()
108	done := make(chan struct{})
109	go func() {
110	defer close(done)
111	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
112	defer cancel()
113	a.ServeHTTP(w, httptest.NewRequest(http.MethodGet, "http://shop.example.com/", nil).WithContext(ctx), rt, proxy)
114	}()
115	time.Sleep(20 * time.Millisecond)
116	close(ready)
117	<-done
118	a.lifeStop()
119	if moved {
120	if proxied || w.Code != http.StatusServiceUnavailable || w.Header().Get("Retry-After") != "5" {
121	t.Fatalf("moved socket: proxied=%v code=%d", proxied, w.Code)
122	}
123	} else if w.Code == http.StatusServiceUnavailable && w.Body.String() == "instance is waking; retry shortly\n" {
124	t.Fatalf("unchanged socket was refused as stale")
125	}
126	}
127	}
128
129	// The race the waiting check misses: the edge chose its proxy, recovery
130	// moved the socket and Startup closed before serve looked. A request near
131	// startup is still checked; one long after it is not.
132	func TestStartupClosedNearStartupRefusesStaleUpstream(t *testing.T) {
133	for _, late := range []bool{false, true} {
134	a := New(Config{}, &fakeBackend{}, nil)
135	ready := make(chan struct{})
136	close(ready)
137	a.Startup = ready
138	if late {
139	a.startupSeenAt.Store(time.Now().Add(-2 * startupFreshWindow).UnixNano())
140	}
141	rt := registry.Route{Host: "shop.example.com", Kind: "instance", Hibernate: true, Socket: "/run/carlos/shop.example.com.sock"}
142	fresh := rt
143	fresh.Socket = "/run/carlos/instances/shop.example.com/app.sock"
144	a.Routes = startupRoutes{rt.Host: fresh}
145	proxied := false
146	proxy := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { proxied = true })
147	w := httptest.NewRecorder()
148	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
149	a.ServeHTTP(w, httptest.NewRequest(http.MethodGet, "http://shop.example.com/", nil).WithContext(ctx), rt, proxy)
150	cancel()
151	a.lifeStop()
152	stale := !proxied && w.Code == http.StatusServiceUnavailable && w.Body.String() == "instance is waking; retry shortly\n"
153	if !late && !stale {
154	t.Fatalf("near startup: moved socket not refused: proxied=%v code=%d", proxied, w.Code)
155	}
156	if late && stale {
157	t.Fatal("long after startup: the route was re-checked")
158	}
159	}
160	}
161