545 lines
11 KiB
Go
545 lines
11 KiB
Go
package api
|
|
|
|
import (
|
|
"log"
|
|
"net/http"
|
|
"net/http/httptest"
|
|
"net/http/httputil"
|
|
"strings"
|
|
"sync"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
func createTestSemaphore(t *testing.T, c *Client, prefix string, limit int) (*Semaphore, *Session) {
|
|
t.Helper()
|
|
session := c.Session()
|
|
|
|
se := &SessionEntry{
|
|
Name: DefaultSemaphoreSessionName,
|
|
TTL: DefaultSemaphoreSessionTTL,
|
|
Behavior: SessionBehaviorDelete,
|
|
}
|
|
id, _, err := session.CreateNoChecks(se, nil)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
opts := &SemaphoreOptions{
|
|
Prefix: prefix,
|
|
Limit: limit,
|
|
Session: id,
|
|
SessionName: se.Name,
|
|
SessionTTL: se.TTL,
|
|
}
|
|
sema, err := c.SemaphoreOpts(opts)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
return sema, session
|
|
}
|
|
|
|
func TestAPI_SemaphoreAcquireRelease(t *testing.T) {
|
|
t.Parallel()
|
|
c, s := makeClient(t)
|
|
defer s.Stop()
|
|
|
|
sema, session := createTestSemaphore(t, c, "test/semaphore", 2)
|
|
defer session.Destroy(sema.opts.Session, nil)
|
|
|
|
// Initial release should fail
|
|
err := sema.Release()
|
|
if err != ErrSemaphoreNotHeld {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Should work
|
|
lockCh, err := sema.Acquire(nil)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if lockCh == nil {
|
|
t.Fatalf("not hold")
|
|
}
|
|
|
|
// Double lock should fail
|
|
_, err = sema.Acquire(nil)
|
|
if err != ErrSemaphoreHeld {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Should be held
|
|
select {
|
|
case <-lockCh:
|
|
t.Fatalf("should be held")
|
|
default:
|
|
}
|
|
|
|
// Initial release should work
|
|
err = sema.Release()
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Double unlock should fail
|
|
err = sema.Release()
|
|
if err != ErrSemaphoreNotHeld {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Should lose resource
|
|
select {
|
|
case <-lockCh:
|
|
case <-time.After(time.Second):
|
|
t.Fatalf("should not be held")
|
|
}
|
|
}
|
|
|
|
func TestAPI_SemaphoreForceInvalidate(t *testing.T) {
|
|
t.Parallel()
|
|
c, s := makeClient(t)
|
|
defer s.Stop()
|
|
|
|
s.WaitForSerfCheck(t)
|
|
|
|
sema, session := createTestSemaphore(t, c, "test/semaphore", 2)
|
|
defer session.Destroy(sema.opts.Session, nil)
|
|
|
|
// Should work
|
|
lockCh, err := sema.Acquire(nil)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if lockCh == nil {
|
|
t.Fatalf("not acquired")
|
|
}
|
|
defer sema.Release()
|
|
|
|
go func() {
|
|
// Nuke the session, simulator an operator invalidation
|
|
// or a health check failure
|
|
session := c.Session()
|
|
session.Destroy(sema.lockSession, nil)
|
|
}()
|
|
|
|
// Should loose slot
|
|
select {
|
|
case <-lockCh:
|
|
case <-time.After(time.Second):
|
|
t.Fatalf("should not be locked")
|
|
}
|
|
}
|
|
|
|
func TestAPI_SemaphoreDeleteKey(t *testing.T) {
|
|
t.Parallel()
|
|
c, s := makeClient(t)
|
|
defer s.Stop()
|
|
|
|
s.WaitForSerfCheck(t)
|
|
|
|
sema, session := createTestSemaphore(t, c, "test/semaphore", 2)
|
|
defer session.Destroy(sema.opts.Session, nil)
|
|
|
|
// Should work
|
|
lockCh, err := sema.Acquire(nil)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if lockCh == nil {
|
|
t.Fatalf("not locked")
|
|
}
|
|
defer sema.Release()
|
|
|
|
go func() {
|
|
// Nuke the key, simulate an operator intervention
|
|
kv := c.KV()
|
|
kv.DeleteTree("test/semaphore", nil)
|
|
}()
|
|
|
|
// Should loose leadership
|
|
select {
|
|
case <-lockCh:
|
|
case <-time.After(time.Second):
|
|
t.Fatalf("should not be locked")
|
|
}
|
|
}
|
|
|
|
func TestAPI_SemaphoreContend(t *testing.T) {
|
|
t.Parallel()
|
|
c, s := makeClient(t)
|
|
defer s.Stop()
|
|
|
|
s.WaitForSerfCheck(t)
|
|
|
|
wg := &sync.WaitGroup{}
|
|
acquired := make([]bool, 4)
|
|
for idx := range acquired {
|
|
wg.Add(1)
|
|
go func(idx int) {
|
|
defer wg.Done()
|
|
sema, session := createTestSemaphore(t, c, "test/semaphore", 2)
|
|
defer session.Destroy(sema.opts.Session, nil)
|
|
|
|
// Should work eventually, will contend
|
|
lockCh, err := sema.Acquire(nil)
|
|
if err != nil {
|
|
t.Errorf("err: %v", err)
|
|
return
|
|
}
|
|
if lockCh == nil {
|
|
t.Errorf("not locked")
|
|
return
|
|
}
|
|
defer sema.Release()
|
|
log.Printf("Contender %d acquired", idx)
|
|
|
|
// Set acquired and then leave
|
|
acquired[idx] = true
|
|
}(idx)
|
|
}
|
|
|
|
// Wait for termination
|
|
doneCh := make(chan struct{})
|
|
go func() {
|
|
wg.Wait()
|
|
close(doneCh)
|
|
}()
|
|
|
|
// Wait for everybody to get a turn
|
|
select {
|
|
case <-doneCh:
|
|
case <-time.After(3 * DefaultLockRetryTime):
|
|
t.Fatalf("timeout")
|
|
}
|
|
|
|
for idx, did := range acquired {
|
|
if !did {
|
|
t.Fatalf("contender %d never acquired", idx)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestAPI_SemaphoreBadLimit(t *testing.T) {
|
|
t.Parallel()
|
|
c, s := makeClient(t)
|
|
defer s.Stop()
|
|
|
|
s.WaitForSerfCheck(t)
|
|
|
|
_, err := c.SemaphorePrefix("test/semaphore", 0)
|
|
if err == nil {
|
|
t.Fatalf("should error, limit must be positive")
|
|
}
|
|
|
|
sema, session := createTestSemaphore(t, c, "test/semaphore", 1)
|
|
defer session.Destroy(sema.opts.Session, nil)
|
|
|
|
_, err = sema.Acquire(nil)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
sema2, session := createTestSemaphore(t, c, "test/semaphore", 2)
|
|
defer session.Destroy(sema.opts.Session, nil)
|
|
|
|
_, err = sema2.Acquire(nil)
|
|
if err.Error() != "semaphore limit conflict (lock: 1, local: 2)" {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestAPI_SemaphoreDestroy(t *testing.T) {
|
|
t.Parallel()
|
|
c, s := makeClient(t)
|
|
defer s.Stop()
|
|
|
|
s.WaitForSerfCheck(t)
|
|
|
|
sema, session := createTestSemaphore(t, c, "test/semaphore", 2)
|
|
defer session.Destroy(sema.opts.Session, nil)
|
|
|
|
sema2, session := createTestSemaphore(t, c, "test/semaphore", 2)
|
|
defer session.Destroy(sema.opts.Session, nil)
|
|
|
|
_, err := sema.Acquire(nil)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
_, err = sema2.Acquire(nil)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Destroy should fail, still held
|
|
if err := sema.Destroy(); err != ErrSemaphoreHeld {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
err = sema.Release()
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Destroy should fail, still in use
|
|
if err := sema.Destroy(); err != ErrSemaphoreInUse {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
err = sema2.Release()
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Destroy should work
|
|
if err := sema.Destroy(); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Destroy should work
|
|
if err := sema2.Destroy(); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestAPI_SemaphoreConflict(t *testing.T) {
|
|
t.Parallel()
|
|
c, s := makeClient(t)
|
|
defer s.Stop()
|
|
|
|
s.WaitForSerfCheck(t)
|
|
lock, session := createTestLock(t, c, "test/sema/.lock")
|
|
defer session.Destroy(lock.opts.Session, nil)
|
|
|
|
// Should work
|
|
leaderCh, err := lock.Lock(nil)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if leaderCh == nil {
|
|
t.Fatalf("not leader")
|
|
}
|
|
defer lock.Unlock()
|
|
|
|
sema, session := createTestSemaphore(t, c, "test/sema/", 2)
|
|
defer session.Destroy(sema.opts.Session, nil)
|
|
|
|
// Should conflict with lock
|
|
_, err = sema.Acquire(nil)
|
|
if err != ErrSemaphoreConflict {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Should conflict with lock
|
|
err = sema.Destroy()
|
|
if err != ErrSemaphoreConflict {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestAPI_SemaphoreMonitorRetry(t *testing.T) {
|
|
t.Parallel()
|
|
raw, s := makeClient(t)
|
|
defer s.Stop()
|
|
|
|
s.WaitForSerfCheck(t)
|
|
|
|
// Set up a server that always responds with 500 errors.
|
|
failer := func(w http.ResponseWriter, req *http.Request) {
|
|
w.WriteHeader(500)
|
|
}
|
|
outage := httptest.NewServer(http.HandlerFunc(failer))
|
|
defer outage.Close()
|
|
|
|
// Set up a reverse proxy that will send some requests to the
|
|
// 500 server and pass everything else through to the real Consul
|
|
// server.
|
|
var mutex sync.Mutex
|
|
errors := 0
|
|
director := func(req *http.Request) {
|
|
mutex.Lock()
|
|
defer mutex.Unlock()
|
|
|
|
req.URL.Scheme = "http"
|
|
if errors > 0 && req.Method == "GET" && strings.Contains(req.URL.Path, "/v1/kv/test/sema/.lock") {
|
|
req.URL.Host = outage.URL[7:] // Strip off "http://".
|
|
errors--
|
|
} else {
|
|
req.URL.Host = raw.config.Address
|
|
}
|
|
}
|
|
proxy := httptest.NewServer(&httputil.ReverseProxy{Director: director})
|
|
defer proxy.Close()
|
|
|
|
// Make another client that points at the proxy instead of the real
|
|
// Consul server.
|
|
config := raw.config
|
|
config.Address = proxy.URL[7:] // Strip off "http://".
|
|
c, err := NewClient(&config)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Set up a lock with retries enabled.
|
|
opts := &SemaphoreOptions{
|
|
Prefix: "test/sema/.lock",
|
|
Limit: 2,
|
|
SessionTTL: "60s",
|
|
MonitorRetries: 3,
|
|
}
|
|
sema, err := c.SemaphoreOpts(opts)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Make sure the default got set.
|
|
if sema.opts.MonitorRetryTime != DefaultMonitorRetryTime {
|
|
t.Fatalf("bad: %d", sema.opts.MonitorRetryTime)
|
|
}
|
|
|
|
// Now set a custom time for the test.
|
|
opts.MonitorRetryTime = 250 * time.Millisecond
|
|
sema, err = c.SemaphoreOpts(opts)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if sema.opts.MonitorRetryTime != 250*time.Millisecond {
|
|
t.Fatalf("bad: %d", sema.opts.MonitorRetryTime)
|
|
}
|
|
|
|
// Should get the lock.
|
|
ch, err := sema.Acquire(nil)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if ch == nil {
|
|
t.Fatalf("didn't acquire")
|
|
}
|
|
|
|
// Take the semaphore using the raw client to force the monitor to wake
|
|
// up and check the lock again. This time we will return errors for some
|
|
// of the responses.
|
|
mutex.Lock()
|
|
errors = 2
|
|
mutex.Unlock()
|
|
another, err := raw.SemaphoreOpts(opts)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if _, err := another.Acquire(nil); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
time.Sleep(5 * opts.MonitorRetryTime)
|
|
|
|
// Should still have the semaphore.
|
|
select {
|
|
case <-ch:
|
|
t.Fatalf("lost the semaphore")
|
|
default:
|
|
}
|
|
|
|
// Now return an overwhelming number of errors, using the raw client to
|
|
// poke the key and get the monitor to run again.
|
|
mutex.Lock()
|
|
errors = 10
|
|
mutex.Unlock()
|
|
if err := another.Release(); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
time.Sleep(5 * opts.MonitorRetryTime)
|
|
|
|
// Should lose the semaphore.
|
|
select {
|
|
case <-ch:
|
|
case <-time.After(time.Second):
|
|
t.Fatalf("should not have the semaphore")
|
|
}
|
|
}
|
|
|
|
func TestAPI_SemaphoreOneShot(t *testing.T) {
|
|
t.Parallel()
|
|
c, s := makeClient(t)
|
|
defer s.Stop()
|
|
|
|
s.WaitForSerfCheck(t)
|
|
|
|
// Set up a semaphore as a one-shot.
|
|
opts := &SemaphoreOptions{
|
|
Prefix: "test/sema/.lock",
|
|
Limit: 2,
|
|
SemaphoreTryOnce: true,
|
|
}
|
|
sema, err := c.SemaphoreOpts(opts)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
// Make sure the default got set.
|
|
if sema.opts.SemaphoreWaitTime != DefaultSemaphoreWaitTime {
|
|
t.Fatalf("bad: %d", sema.opts.SemaphoreWaitTime)
|
|
}
|
|
|
|
// Now set a custom time for the test.
|
|
opts.SemaphoreWaitTime = 250 * time.Millisecond
|
|
sema, err = c.SemaphoreOpts(opts)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if sema.opts.SemaphoreWaitTime != 250*time.Millisecond {
|
|
t.Fatalf("bad: %d", sema.opts.SemaphoreWaitTime)
|
|
}
|
|
|
|
// Should acquire the semaphore.
|
|
ch, err := sema.Acquire(nil)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if ch == nil {
|
|
t.Fatalf("should have acquired the semaphore")
|
|
}
|
|
|
|
// Try with another session.
|
|
another, err := c.SemaphoreOpts(opts)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
ch, err = another.Acquire(nil)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if ch == nil {
|
|
t.Fatalf("should have acquired the semaphore")
|
|
}
|
|
|
|
// Try with a third one that shouldn't get it.
|
|
contender, err := c.SemaphoreOpts(opts)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
start := time.Now()
|
|
ch, err = contender.Acquire(nil)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if ch != nil {
|
|
t.Fatalf("should not have acquired the semaphore")
|
|
}
|
|
diff := time.Since(start)
|
|
if diff < contender.opts.SemaphoreWaitTime {
|
|
t.Fatalf("time out of bounds: %9.6f", diff.Seconds())
|
|
}
|
|
|
|
// Give up a slot and make sure the third one can get it.
|
|
if err := another.Release(); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
ch, err = contender.Acquire(nil)
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
if ch == nil {
|
|
t.Fatalf("should have acquired the semaphore")
|
|
}
|
|
}
|