apitech
/
loki
mirror of https://github.com/grafana/loki
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Update distributor push tests (#6641)

Browse Source 
Adds a test case for concurrent pushes (which would have spotted a bug
in https://github.com/grafana/loki/pull/5248) and a test case for
tolerance regarding replication factor.

The PR also replaces the mock ring with an actual in-memory kv store
ring.
And variables and function names were changed to meet Loki/logs
terminology.

Signed-off-by: Christian Haudum <christian.haudum@gmail.com>
pull/7210/head
Christian Haudum 3 years ago committed by GitHub
parent d8eb8b2a9f
commit 67b12f2357
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 248 additions and 201 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 58
      pkg/distributor/distributor.go
  2. 358
      pkg/distributor/distributor_test.go
  3. 7
      pkg/distributor/http_test.go

58
pkg/distributor/distributor.go
Unescape View File

@ -232,8 +232,8 @@ type streamTracker struct {
// TODO taken from Cortex, see if we can refactor out an usable interface.
type pushTracker struct {
samplesPending atomic.Int32
samplesFailed atomic.Int32
streamsPending atomic.Int32
streamsFailed atomic.Int32
done chan struct{}
err chan error
}
@ -256,8 +256,8 @@ func (d *Distributor) Push(ctx context.Context, req *logproto.PushRequest) (*log
// We also work out the hash value at the same time.
streams := make([]streamTracker, 0, len(req.Streams))
keys := make([]uint32, 0, len(req.Streams))
validatedSamplesSize := 0
validatedSamplesCount := 0
validatedLineSize := 0
validatedLineCount := 0
var validationErr error
validationContext := d.validator.getValidationContextForTime(time.Now(), userID)
@ -305,8 +305,8 @@ func (d *Distributor) Push(ctx context.Context, req *logproto.PushRequest) (*log
}
n++
validatedSamplesSize += len(entry.Line)
validatedSamplesCount++
validatedLineSize += len(entry.Line)
validatedLineCount++
}
stream.Entries = stream.Entries[:n]
@ -326,17 +326,17 @@ func (d *Distributor) Push(ctx context.Context, req *logproto.PushRequest) (*log
}
now := time.Now()
if !d.ingestionRateLimiter.AllowN(now, userID, validatedSamplesSize) {
if !d.ingestionRateLimiter.AllowN(now, userID, validatedLineSize) {
// Return a 429 to indicate to the client they are being rate limited
validation.DiscardedSamples.WithLabelValues(validation.RateLimited, userID).Add(float64(validatedSamplesCount))
validation.DiscardedBytes.WithLabelValues(validation.RateLimited, userID).Add(float64(validatedSamplesSize))
return nil, httpgrpc.Errorf(http.StatusTooManyRequests, validation.RateLimitedErrorMsg, userID, int(d.ingestionRateLimiter.Limit(now, userID)), validatedSamplesCount, validatedSamplesSize)
validation.DiscardedSamples.WithLabelValues(validation.RateLimited, userID).Add(float64(validatedLineCount))
validation.DiscardedBytes.WithLabelValues(validation.RateLimited, userID).Add(float64(validatedLineSize))
return nil, httpgrpc.Errorf(http.StatusTooManyRequests, validation.RateLimitedErrorMsg, userID, int(d.ingestionRateLimiter.Limit(now, userID)), validatedLineCount, validatedLineSize)
}
const maxExpectedReplicationSet = 5 // typical replication factor 3 plus one for inactive plus one for luck
var descs [maxExpectedReplicationSet]ring.InstanceDesc
samplesByIngester := map[string][]*streamTracker{}
streamsByIngester := map[string][]*streamTracker{}
ingesterDescs := map[string]ring.InstanceDesc{}
for i, key := range keys {
replicationSet, err := d.ingestersRing.Get(key, ring.Write, descs[:0], nil, nil)
@ -347,7 +347,7 @@ func (d *Distributor) Push(ctx context.Context, req *logproto.PushRequest) (*log
streams[i].minSuccess = len(replicationSet.Instances) - replicationSet.MaxErrors
streams[i].maxFailures = replicationSet.MaxErrors
for _, ingester := range replicationSet.Instances {
samplesByIngester[ingester.Addr] = append(samplesByIngester[ingester.Addr], &streams[i])
streamsByIngester[ingester.Addr] = append(streamsByIngester[ingester.Addr], &streams[i])
ingesterDescs[ingester.Addr] = ingester
}
}
@ -356,8 +356,8 @@ func (d *Distributor) Push(ctx context.Context, req *logproto.PushRequest) (*log
done: make(chan struct{}, 1), // buffer avoids blocking if caller terminates - sendSamples() only sends once on each
err: make(chan error, 1),
}
tracker.samplesPending.Store(int32(len(streams)))
for ingester, samples := range samplesByIngester {
tracker.streamsPending.Store(int32(len(streams)))
for ingester, streams := range streamsByIngester {
go func(ingester ring.InstanceDesc, samples []*streamTracker) {
// Use a background context to make sure all ingesters get samples even if we return early
localCtx, cancel := context.WithTimeout(context.Background(), d.clientCfg.RemoteTimeout)
@ -366,8 +366,8 @@ func (d *Distributor) Push(ctx context.Context, req *logproto.PushRequest) (*log
if sp := opentracing.SpanFromContext(ctx); sp != nil {
localCtx = opentracing.ContextWithSpan(localCtx, sp)
}
d.sendSamples(localCtx, ingester, samples, &tracker)
}(ingesterDescs[ingester], samples)
d.sendStreams(localCtx, ingester, samples, &tracker)
}(ingesterDescs[ingester], streams)
}
select {
case err := <-tracker.err:
@ -500,31 +500,31 @@ func (d *Distributor) truncateLines(vContext validationContext, stream *logproto
}
// TODO taken from Cortex, see if we can refactor out an usable interface.
func (d *Distributor) sendSamples(ctx context.Context, ingester ring.InstanceDesc, streamTrackers []*streamTracker, pushTracker *pushTracker) {
err := d.sendSamplesErr(ctx, ingester, streamTrackers)
// If we succeed, decrement each sample's pending count by one. If we reach
// the required number of successful puts on this sample, then decrement the
// number of pending samples by one. If we successfully push all samples to
// min success ingesters, wake up the waiting rpc so it can return early.
// Similarly, track the number of errors, and if it exceeds maxFailures
// shortcut the waiting rpc.
func (d *Distributor) sendStreams(ctx context.Context, ingester ring.InstanceDesc, streamTrackers []*streamTracker, pushTracker *pushTracker) {
err := d.sendStreamsErr(ctx, ingester, streamTrackers)
// If we succeed, decrement each stream's pending count by one.
// If we reach the required number of successful puts on this stream, then
// decrement the number of pending streams by one.
// If we successfully push all streams to min success ingesters, wake up the
// waiting rpc so it can return early. Similarly, track the number of errors,
// and if it exceeds maxFailures shortcut the waiting rpc.
//
// The use of atomic increments here guarantees only a single sendSamples
// The use of atomic increments here guarantees only a single sendStreams
// goroutine will write to either channel.
for i := range streamTrackers {
if err != nil {
if streamTrackers[i].failed.Inc() <= int32(streamTrackers[i].maxFailures) {
continue
}
if pushTracker.samplesFailed.Inc() == 1 {
if pushTracker.streamsFailed.Inc() == 1 {
pushTracker.err <- err
}
} else {
if streamTrackers[i].succeeded.Inc() != int32(streamTrackers[i].minSuccess) {
continue
}
if pushTracker.samplesPending.Dec() == 0 {
if pushTracker.streamsPending.Dec() == 0 {
pushTracker.done <- struct{}{}
}
}
@ -532,7 +532,7 @@ func (d *Distributor) sendSamples(ctx context.Context, ingester ring.InstanceDes
}
// TODO taken from Cortex, see if we can refactor out an usable interface.
func (d *Distributor) sendSamplesErr(ctx context.Context, ingester ring.InstanceDesc, streams []*streamTracker) error {
func (d *Distributor) sendStreamsErr(ctx context.Context, ingester ring.InstanceDesc, streams []*streamTracker) error {
c, err := d.pool.GetClientFor(ingester.Addr)
if err != nil {
return err

358
pkg/distributor/distributor_test.go
Unescape View File

@ -8,6 +8,7 @@ import (
"net/http"
"strconv"
"strings"
"sync"
"testing"
"time"
@ -28,6 +29,7 @@ import (
"google.golang.org/grpc"
"google.golang.org/grpc/health/grpc_health_v1"
"github.com/grafana/loki/pkg/ingester"
"github.com/grafana/loki/pkg/ingester/client"
"github.com/grafana/loki/pkg/logproto"
"github.com/grafana/loki/pkg/logql/syntax"
@ -38,10 +40,6 @@ import (
"github.com/grafana/loki/pkg/validation"
)
const (
numIngesters = 5
)
var (
success = &logproto.PushResponse{}
ctx = user.InjectOrgID(context.Background(), "test")
@ -78,7 +76,7 @@ func TestDistributor(t *testing.T) {
expectedError: httpgrpc.Errorf(http.StatusBadRequest, validation.InvalidLabelsErrorMsg, "{ab\"", "1:4: parse error: unterminated quoted string"),
},
} {
t.Run(fmt.Sprintf("[%d](samples=%v)", i, tc.lines), func(t *testing.T) {
t.Run(fmt.Sprintf("[%d](lines=%v)", i, tc.lines), func(t *testing.T) {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
limits.EnforceMetricName = false
@ -86,8 +84,7 @@ func TestDistributor(t *testing.T) {
limits.IngestionBurstSizeMB = ingestionRateLimit
limits.MaxLineSize = fe.ByteSize(tc.maxLineSize)
d := prepare(t, limits, nil, nil)
defer services.StopAndAwaitTerminated(context.Background(), d) //nolint:errcheck
distributors, _ := prepare(t, 1, 5, limits, nil)
request := makeWriteRequest(tc.lines, 10)
@ -95,7 +92,7 @@ func TestDistributor(t *testing.T) {
request.Streams[0].Labels = `{ab"`
}
response, err := d.Push(ctx, request)
response, err := distributors[i%len(distributors)].Push(ctx, request)
assert.Equal(t, tc.expectedResponse, response)
assert.Equal(t, tc.expectedError, err)
})
@ -327,27 +324,107 @@ func Test_IncrementTimestamp(t *testing.T) {
testData := testData
t.Run(testName, func(t *testing.T) {
ingester := &mockIngester{}
d := prepare(t, testData.limits, nil, func(addr string) (ring_client.PoolClient, error) { return ingester, nil })
defer services.StopAndAwaitTerminated(context.Background(), d) //nolint:errcheck
_, err := d.Push(ctx, testData.push)
ing := &mockIngester{}
distributors, _ := prepare(t, 1, 3, testData.limits, func(addr string) (ring_client.PoolClient, error) { return ing, nil })
_, err := distributors[0].Push(ctx, testData.push)
assert.NoError(t, err)
assert.Equal(t, testData.expectedPush, ingester.pushed[0])
assert.Equal(t, testData.expectedPush, ing.pushed[0])
})
}
}
func TestDistributorPushConcurrently(t *testing.T) {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
distributors, ingesters := prepare(t, 1, 5, limits, nil)
numReq := 1
var wg sync.WaitGroup
for i := 0; i < numReq; i++ {
wg.Add(1)
go func(n int) {
defer wg.Done()
request := makeWriteRequestWithLabels(100, 100,
[]string{
fmt.Sprintf(`{app="foo-%d"}`, n),
fmt.Sprintf(`{instance="bar-%d"}`, n),
},
)
response, err := distributors[n%len(distributors)].Push(ctx, request)
assert.NoError(t, err)
assert.Equal(t, &logproto.PushResponse{}, response)
}(i)
}
wg.Wait()
// make sure the ingesters received the push requests
time.Sleep(10 * time.Millisecond)
counter := 0
labels := make(map[string]int)
for i := range ingesters {
pushed := ingesters[i].pushed
counter = counter + len(pushed)
for _, pr := range pushed {
for _, st := range pr.Streams {
labels[st.Labels] = labels[st.Labels] + 1
}
}
}
assert.Equal(t, numReq*3, counter) // RF=3
// each stream is present 3 times
for i := 0; i < numReq; i++ {
l := fmt.Sprintf(`{instance="bar-%d"}`, i)
assert.Equal(t, 3, labels[l], "stream %s expected 3 times, got %d", l, labels[l])
l = fmt.Sprintf(`{app="foo-%d"}`, i)
assert.Equal(t, 3, labels[l], "stream %s expected 3 times, got %d", l, labels[l])
}
}
func TestDistributorPushErrors(t *testing.T) {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
t.Run("with RF=3 a single push can fail", func(t *testing.T) {
distributors, ingesters := prepare(t, 1, 3, limits, nil)
ingesters[0].failAfter = 5 * time.Millisecond
ingesters[1].succeedAfter = 10 * time.Millisecond
ingesters[2].succeedAfter = 15 * time.Millisecond
request := makeWriteRequest(10, 64)
_, err := distributors[0].Push(ctx, request)
require.NoError(t, err)
require.Equal(t, 0, len(ingesters[0].pushed))
require.Equal(t, 1, len(ingesters[1].pushed))
require.Equal(t, 1, len(ingesters[2].pushed))
})
t.Run("with RF=3 two push failures result in error", func(t *testing.T) {
distributors, ingesters := prepare(t, 1, 3, limits, nil)
ingesters[0].failAfter = 5 * time.Millisecond
ingesters[1].succeedAfter = 10 * time.Millisecond
ingesters[2].failAfter = 15 * time.Millisecond
request := makeWriteRequest(10, 64)
_, err := distributors[0].Push(ctx, request)
require.Error(t, err)
require.Equal(t, 0, len(ingesters[0].pushed))
require.Equal(t, 1, len(ingesters[1].pushed))
require.Equal(t, 0, len(ingesters[2].pushed))
})
}
func Test_SortLabelsOnPush(t *testing.T) {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
limits.EnforceMetricName = false
ingester := &mockIngester{}
d := prepare(t, limits, nil, func(addr string) (ring_client.PoolClient, error) { return ingester, nil })
defer services.StopAndAwaitTerminated(context.Background(), d) //nolint:errcheck
distributors, _ := prepare(t, 1, 5, limits, func(addr string) (ring_client.PoolClient, error) { return ingester, nil })
request := makeWriteRequest(10, 10)
request.Streams[0].Labels = `{buzz="f", a="b"}`
_, err := d.Push(ctx, request)
_, err := distributors[0].Push(ctx, request)
require.NoError(t, err)
require.Equal(t, `{a="b", buzz="f"}`, ingester.pushed[0].Streams[0].Labels)
}
@ -365,11 +442,9 @@ func Test_TruncateLogLines(t *testing.T) {
t.Run("it truncates lines to MaxLineSize when MaxLineSizeTruncate is true", func(t *testing.T) {
limits, ingester := setup()
distributors, _ := prepare(t, 1, 5, limits, func(addr string) (ring_client.PoolClient, error) { return ingester, nil })
d := prepare(t, limits, nil, func(addr string) (ring_client.PoolClient, error) { return ingester, nil })
defer services.StopAndAwaitTerminated(context.Background(), d) //nolint:errcheck
_, err := d.Push(ctx, makeWriteRequest(1, 10))
_, err := distributors[0].Push(ctx, makeWriteRequest(1, 10))
require.NoError(t, err)
require.Len(t, ingester.pushed[0].Streams[0].Entries[0].Line, 5)
})
@ -701,9 +776,8 @@ func Benchmark_SortLabelsOnPush(b *testing.B) {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
limits.EnforceMetricName = false
ingester := &mockIngester{}
d := prepare(&testing.T{}, limits, nil, func(addr string) (ring_client.PoolClient, error) { return ingester, nil })
defer services.StopAndAwaitTerminated(context.Background(), d) //nolint:errcheck
distributors, _ := prepare(&testing.T{}, 1, 5, limits, nil)
d := distributors[0]
request := makeWriteRequest(10, 10)
vCtx := d.validator.getValidationContextForTime(testTime, "123")
for n := 0; n < b.N; n++ {
@ -727,17 +801,14 @@ func Benchmark_Push(b *testing.B) {
limits.RejectOldSamples = true
limits.RejectOldSamplesMaxAge = model.Duration(24 * time.Hour)
limits.CreationGracePeriod = model.Duration(24 * time.Hour)
ingester := &mockIngester{}
d := prepare(&testing.T{}, limits, nil, func(addr string) (ring_client.PoolClient, error) { return ingester, nil })
defer services.StopAndAwaitTerminated(context.Background(), d) //nolint:errcheck
distributors, _ := prepare(&testing.T{}, 1, 5, limits, nil)
request := makeWriteRequest(100000, 100)
b.ResetTimer()
b.ReportAllocs()
for n := 0; n < b.N; n++ {
_, err := d.Push(ctx, request)
_, err := distributors[0].Push(ctx, request)
if err != nil {
require.NoError(b, err)
}
@ -752,9 +823,7 @@ func Benchmark_PushWithLineTruncation(b *testing.B) {
limits.MaxLineSizeTruncate = true
limits.MaxLineSize = 50
ingester := &mockIngester{}
d := prepare(&testing.T{}, limits, nil, func(addr string) (ring_client.PoolClient, error) { return ingester, nil })
defer services.StopAndAwaitTerminated(context.Background(), d) //nolint:errcheck
distributors, _ := prepare(&testing.T{}, 1, 5, limits, nil)
request := makeWriteRequest(100000, 100)
b.ResetTimer()
@ -762,7 +831,7 @@ func Benchmark_PushWithLineTruncation(b *testing.B) {
for n := 0; n < b.N; n++ {
_, err := d.Push(ctx, request)
_, err := distributors[0].Push(ctx, request)
if err != nil {
require.NoError(b, err)
}
@ -831,26 +900,7 @@ func TestDistributor_PushIngestionRateLimiter(t *testing.T) {
limits.IngestionRateMB = testData.ingestionRateMB
limits.IngestionBurstSizeMB = testData.ingestionBurstSizeMB
// Init a shared KVStore
kvStore, closer := consul.NewInMemoryClient(ring.GetCodec(), log.NewNopLogger(), nil)
t.Cleanup(func() { assert.NoError(t, closer.Close()) })
// Start all expected distributors
distributors := make([]*Distributor, testData.distributors)
for i := 0; i < testData.distributors; i++ {
distributors[i] = prepare(t, limits, kvStore, nil)
defer services.StopAndAwaitTerminated(context.Background(), distributors[i]) //nolint:errcheck
}
// If the distributors ring is setup, wait until the first distributor
// updates to the expected size
if distributors[0].distributorsLifecycler != nil {
test.Poll(t, time.Second, testData.distributors, func() interface{} {
return distributors[0].distributorsLifecycler.HealthyInstancesCount()
})
}
// Push samples in multiple requests to the first distributor
distributors, _ := prepare(t, testData.distributors, 5, limits, nil)
for _, push := range testData.pushes {
request := makeWriteRequest(1, push.bytes)
response, err := distributors[0].Push(ctx, request)
@ -867,156 +917,156 @@ func TestDistributor_PushIngestionRateLimiter(t *testing.T) {
}
}
func prepare(t *testing.T, limits *validation.Limits, kvStore kv.Client, factory func(addr string) (ring_client.PoolClient, error)) *Distributor {
var (
distributorConfig Config
clientConfig client.Config
)
flagext.DefaultValues(&distributorConfig, &clientConfig)
overrides, err := validation.NewOverrides(*limits, nil)
require.NoError(t, err)
func prepare(t *testing.T, numDistributors, numIngesters int, limits *validation.Limits, factory func(addr string) (ring_client.PoolClient, error)) ([]*Distributor, []mockIngester) {
t.Helper()
// Mock the ingesters ring
ingesters := map[string]*mockIngester{}
ingesters := make([]mockIngester, numIngesters)
for i := 0; i < numIngesters; i++ {
ingesters[fmt.Sprintf("ingester%d", i)] = &mockIngester{}
ingesters[i] = mockIngester{}
}
ingestersRing := &mockRing{
replicationFactor: 3,
}
for addr := range ingesters {
ingestersRing.ingesters = append(ingestersRing.ingesters, ring.InstanceDesc{
ingesterByAddr := map[string]*mockIngester{}
ingesterDescs := map[string]ring.InstanceDesc{}
for i := range ingesters {
addr := fmt.Sprintf("ingester-%d", i)
ingesterDescs[addr] = ring.InstanceDesc{
Addr: addr,
})
State: ring.ACTIVE,
Timestamp: time.Now().Unix(),
RegisteredTimestamp: time.Now().Add(-10 * time.Minute).Unix(),
Tokens: []uint32{uint32((math.MaxUint32 / numIngesters) * i)},
}
ingesterByAddr[addr] = &ingesters[i]
}
kvStore, closer := consul.NewInMemoryClient(ring.GetCodec(), log.NewNopLogger(), nil)
err := kvStore.CAS(context.Background(), ingester.RingKey,
func(_ interface{}) (interface{}, bool, error) {
return &ring.Desc{
Ingesters: ingesterDescs,
}, true, nil
},
)
require.NoError(t, err)
ingestersRing, err := ring.New(ring.Config{
KVStore: kv.Config{
Mock: kvStore,
},
HeartbeatTimeout: 60 * time.Minute,
ReplicationFactor: 3,
}, ingester.RingKey, ingester.RingKey, nil, nil)
require.NoError(t, err)
require.NoError(t, services.StartAndAwaitRunning(context.Background(), ingestersRing))
test.Poll(t, time.Second, numIngesters, func() interface{} {
return ingestersRing.InstancesCount()
})
loopbackName, err := loki_net.LoopbackInterfaceName()
require.NoError(t, err)
distributors := make([]*Distributor, numDistributors)
for i := 0; i < numDistributors; i++ {
var distributorConfig Config
var clientConfig client.Config
flagext.DefaultValues(&distributorConfig, &clientConfig)
distributorConfig.DistributorRing.HeartbeatPeriod = 100 * time.Millisecond
distributorConfig.DistributorRing.InstanceID = strconv.Itoa(rand.Int())
distributorConfig.DistributorRing.KVStore.Mock = kvStore
distributorConfig.DistributorRing.KVStore.Store = "inmemory"
distributorConfig.DistributorRing.InstanceAddr = "127.0.0.1"
distributorConfig.DistributorRing.InstanceInterfaceNames = []string{loopbackName}
distributorConfig.factory = factory
if factory == nil {
distributorConfig.factory = func(addr string) (ring_client.PoolClient, error) {
return ingesters[addr], nil
return ingesterByAddr[addr], nil
}
}
d, err := New(distributorConfig, clientConfig, runtime.DefaultTenantConfigs(), ingestersRing, overrides, nil)
overrides, err := validation.NewOverrides(*limits, nil)
require.NoError(t, err)
require.NoError(t, services.StartAndAwaitRunning(context.Background(), d))
return d
}
func makeWriteRequest(lines int, size int) *logproto.PushRequest {
req := logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: `{foo="bar"}`,
},
},
d, err := New(distributorConfig, clientConfig, runtime.DefaultTenantConfigs(), ingestersRing, overrides, prometheus.NewPedanticRegistry())
require.NoError(t, err)
require.NoError(t, services.StartAndAwaitRunning(context.Background(), d))
distributors[i] = d
}
for i := 0; i < lines; i++ {
// Construct the log line, honoring the input size
line := strconv.Itoa(i) + strings.Repeat(" ", size)
line = line[:size]
req.Streams[0].Entries = append(req.Streams[0].Entries, logproto.Entry{
Timestamp: time.Now().Add(time.Duration(i) * time.Millisecond),
Line: line,
if distributors[0].distributorsLifecycler != nil {
test.Poll(t, time.Second, numDistributors, func() interface{} {
return distributors[0].distributorsLifecycler.HealthyInstancesCount()
})
}
return &req
}
type mockIngester struct {
grpc_health_v1.HealthClient
logproto.PusherClient
pushed []*logproto.PushRequest
t.Cleanup(func() {
assert.NoError(t, closer.Close())
for _, d := range distributors {
assert.NoError(t, services.StopAndAwaitTerminated(context.Background(), d))
}
ingestersRing.StopAsync()
})
func (i *mockIngester) Push(ctx context.Context, in *logproto.PushRequest, opts ...grpc.CallOption) (*logproto.PushResponse, error) {
i.pushed = append(i.pushed, in)
return nil, nil
return distributors, ingesters
}
func (i *mockIngester) Close() error {
return nil
}
func makeWriteRequestWithLabels(lines, size int, labels []string) *logproto.PushRequest {
streams := make([]logproto.Stream, len(labels))
for i := 0; i < len(labels); i++ {
stream := logproto.Stream{Labels: labels[i]}
// Copied from Cortex; TODO(twilkie) - factor this our and share it.
// mockRing doesn't do virtual nodes, just returns mod(key) + replicationFactor
// ingesters.
type mockRing struct {
prometheus.Counter
ingesters []ring.InstanceDesc
replicationFactor uint32
}
for j := 0; j < lines; j++ {
// Construct the log line, honoring the input size
line := strconv.Itoa(j) + strings.Repeat("0", size)
line = line[:size]
func (r mockRing) Get(key uint32, op ring.Operation, buf []ring.InstanceDesc, _ []string, _ []string) (ring.ReplicationSet, error) {
result := ring.ReplicationSet{
MaxErrors: 1,
Instances: buf[:0],
}
for i := uint32(0); i < r.replicationFactor; i++ {
n := (key + i) % uint32(len(r.ingesters))
result.Instances = append(result.Instances, r.ingesters[n])
}
return result, nil
stream.Entries = append(stream.Entries, logproto.Entry{
Timestamp: time.Now().Add(time.Duration(j) * time.Millisecond),
Line: line,
})
}
func (r mockRing) GetAllHealthy(op ring.Operation) (ring.ReplicationSet, error) {
return r.GetReplicationSetForOperation(op)
streams[i] = stream
}
func (r mockRing) GetReplicationSetForOperation(op ring.Operation) (ring.ReplicationSet, error) {
return ring.ReplicationSet{
Instances: r.ingesters,
MaxErrors: 1,
}, nil
return &logproto.PushRequest{
Streams: streams,
}
func (r mockRing) ReplicationFactor() int {
return int(r.replicationFactor)
}
func (r mockRing) InstancesCount() int {
return len(r.ingesters)
func makeWriteRequest(lines, size int) *logproto.PushRequest {
return makeWriteRequestWithLabels(lines, size, []string{`{foo="bar"}`})
}
func (r mockRing) Subring(key uint32, n int) ring.ReadRing {
return r
}
type mockIngester struct {
grpc_health_v1.HealthClient
logproto.PusherClient
func (r mockRing) HasInstance(instanceID string) bool {
for _, ing := range r.ingesters {
if ing.Addr != instanceID {
return true
failAfter time.Duration
succeedAfter time.Duration
mu sync.Mutex
pushed []*logproto.PushRequest
}
func (i *mockIngester) Push(ctx context.Context, in *logproto.PushRequest, opts ...grpc.CallOption) (*logproto.PushResponse, error) {
if i.failAfter > 0 {
time.Sleep(i.failAfter)
return nil, fmt.Errorf("push request failed")
}
return false
if i.succeedAfter > 0 {
time.Sleep(i.succeedAfter)
}
func (r mockRing) ShuffleShard(identifier string, size int) ring.ReadRing {
// take advantage of pass by value to bound to size:
r.ingesters = r.ingesters[:size]
return r
}
i.mu.Lock()
defer i.mu.Unlock()
func (r mockRing) ShuffleShardWithLookback(identifier string, size int, lookbackPeriod time.Duration, now time.Time) ring.ReadRing {
return r
i.pushed = append(i.pushed, in)
return nil, nil
}
func (r mockRing) CleanupShuffleShardCache(identifier string) {}
func (r mockRing) GetInstanceState(instanceID string) (ring.InstanceState, error) {
return 0, nil
func (i *mockIngester) Close() error {
return nil
}

7
pkg/distributor/http_test.go
Unescape View File

@ -1,14 +1,12 @@
package distributor
import (
"context"
"io/ioutil"
"net/http"
"net/http/httptest"
"testing"
"github.com/grafana/dskit/flagext"
"github.com/grafana/dskit/services"
"github.com/stretchr/testify/require"
"github.com/grafana/loki/pkg/validation"
@ -19,11 +17,10 @@ func TestDistributorRingHandler(t *testing.T) {
flagext.DefaultValues(limits)
runServer := func() *httptest.Server {
d := prepare(t, limits, nil, nil)
defer services.StopAndAwaitTerminated(context.Background(), d) //nolint:errcheck
distributors, _ := prepare(t, 1, 3, limits, nil)
return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
d.ServeHTTP(w, r)
distributors[0].ServeHTTP(w, r)
}))
}

Write Preview
Loading…
Cancel
Save