(otelarrowreceiver): add admission control to otlp path

.chloggen/admission-control-for-otlp.yaml

@@ -0,0 +1,31 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: otelarrowreceiver
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: |
+  Add admission control in the otelarrow receiver's standard otlp data path.
+  Also moves admission control config options to a separate block.
+  arrow.admission_limit_mib -> admission.request_limit_mib
+  arrow.waiter_limit -> admission.waiter_limit
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [35021]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [user]

internal/otelarrow/go.mod

@@ -44,13 +44,19 @@ require (
 	github.com/fxamacker/cbor/v2 v2.4.0 // indirect
 	github.com/go-logr/logr v1.4.2 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/go-viper/mapstructure/v2 v2.1.0 // indirect
 	github.com/goccy/go-json v0.10.3 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/snappy v0.0.5-0.20220116011046-fa5810519dcb // indirect
 	github.com/google/flatbuffers v24.3.25+incompatible // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.8 // indirect
+	github.com/knadh/koanf/maps v0.1.1 // indirect
+	github.com/knadh/koanf/providers/confmap v0.1.0 // indirect
+	github.com/knadh/koanf/v2 v2.1.1 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/mitchellh/copystructure v1.2.0 // indirect
+	github.com/mitchellh/reflectwalk v1.0.2 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/mostynb/go-grpc-compression v1.2.3 // indirect
@@ -69,6 +75,7 @@ require (
 	go.opentelemetry.io/collector/config/configretry v1.16.0 // indirect
 	go.opentelemetry.io/collector/config/configtls v1.16.0 // indirect
 	go.opentelemetry.io/collector/config/internal v0.110.0 // indirect
+	go.opentelemetry.io/collector/confmap v1.16.0 // indirect
 	go.opentelemetry.io/collector/consumer/consumerprofiles v0.110.0 // indirect
 	go.opentelemetry.io/collector/extension v0.110.0 // indirect
 	go.opentelemetry.io/collector/extension/auth v0.110.0 // indirect

receiver/otelarrowreceiver/README.md

@@ -77,6 +77,16 @@ Several common configuration structures provide additional capabilities automati
 - [gRPC settings](https://github.com/open-telemetry/opentelemetry-collector/blob/main/config/configgrpc/README.md)
 - [TLS and mTLS settings](https://github.com/open-telemetry/opentelemetry-collector/blob/main/config/configtls/README.md)
 
+### Admission Control Configuration
+
+In the `admission` configuration block the following settings are available:
+
+- `request_limit_mib` (default: 128): limits the number of requests that are received by the stream in terms of *uncompressed request size*. This should not be confused with `arrow.memory_limit_mib` which limits allocations made by the consumer when translating arrow records into pdata objects. i.e. request size is used to control how much traffic we admit, but does not control how much memory is used during request processing.
+
+- `waiter_limit` (default: 1000): limits the number of requests waiting on admission once `admission_limit_mib` is reached. This is another dimension of memory limiting that ensures waiters are not holding onto a significant amount of memory while waiting to be processed.
+
+`request_limit_mib` and `waiter_limit` are arguments supplied to [admission.BoundedQueue](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/internal/otelarrow/admission). This custom semaphore is meant to be used within receivers to help limit memory within the collector pipeline.
+
 ### Arrow-specific Configuration
 
 In the `arrow` configuration block, the following settings are available:
@@ -87,13 +97,6 @@ When the limit is reached, the receiver will return RESOURCE_EXHAUSTED
 error codes to the receiver, which are [conditionally retryable, see
 exporter retry configuration](https://github.com/open-telemetry/opentelemetry-collector/blob/main/exporter/exporterhelper/README.md).
 
-- `admission_limit_mib` (default: 64): limits the number of requests that are received by the stream based on request size information available. This should not be confused with `memory_limit_mib` which limits allocations made by the consumer when translating arrow records into pdata objects. i.e. request size is used to control how much traffic we admit, but does not control how much memory is used during request processing.
-
-- `waiter_limit` (default: 1000): limits the number of requests waiting on admission once `admission_limit_mib` is reached. This is another dimension of memory limiting that ensures waiters are not holding onto a significant amount of memory while waiting to be processed.
-
-`admission_limit_mib` and `waiter_limit` are arguments supplied to [admission.BoundedQueue](https://github.com/open-telemetry/otel-arrow/tree/main/collector/admission). This custom semaphore is meant to be used within receivers to help limit memory within the collector pipeline.
-
-
 ### Compression Configuration
 
 In the `arrow` configuration block, `zstd` sub-section applies to all

receiver/otelarrowreceiver/config.go

@@ -8,6 +8,7 @@ import (
 
 	"go.opentelemetry.io/collector/component"
 	"go.opentelemetry.io/collector/config/configgrpc"
+	"go.opentelemetry.io/collector/confmap"
 
 	"github.com/open-telemetry/opentelemetry-collector-contrib/internal/otelarrow/compression/zstd"
 )
@@ -18,22 +19,30 @@ type Protocols struct {
 	Arrow ArrowConfig             `mapstructure:"arrow"`
 }
 
+type AdmissionConfig struct {
+	// RequestLimitMiB limits the number of requests that are received by the stream based on
+	// uncompressed request size. Request size is used to control how much traffic we admit
+	// for processing.
+	RequestLimitMiB uint64 `mapstructure:"request_limit_mib"`
+
+	// WaiterLimit is the limit on the number of waiters waiting to be processed and consumed.
+	// This is a dimension of memory limiting to ensure waiters are not consuming an
+	// unexpectedly large amount of memory in the arrow receiver.
+	WaiterLimit int64 `mapstructure:"waiter_limit"`
+}
+
 // ArrowConfig support configuring the Arrow receiver.
 type ArrowConfig struct {
 	// MemoryLimitMiB is the size of a shared memory region used
 	// by all Arrow streams, in MiB.  When too much load is
 	// passing through, they will see ResourceExhausted errors.
 	MemoryLimitMiB uint64 `mapstructure:"memory_limit_mib"`
 
-	// AdmissionLimitMiB limits the number of requests that are received by the stream based on
-	// request size information available. Request size is used to control how much traffic we admit
-	// for processing, but does not control how much memory is used during request processing.
-	AdmissionLimitMiB uint64 `mapstructure:"admission_limit_mib"`
+	// Deprecated: This field is no longer supported, use cfg.Admission.RequestLimitMiB instead.
+	DeprecatedAdmissionLimitMiB uint64 `mapstructure:"admission_limit_mib"`
 
-	// WaiterLimit is the limit on the number of waiters waiting to be processed and consumed.
-	// This is a dimension of memory limiting to ensure waiters are not consuming an
-	// unexpectedly large amount of memory in the arrow receiver.
-	WaiterLimit int64 `mapstructure:"waiter_limit"`
+	// Deprecated: This field is no longer supported, use cfg.Admission.WaiterLimit instead.
+	DeprecatedWaiterLimit int64 `mapstructure:"waiter_limit"`
 
 	// Zstd settings apply to OTel-Arrow use of gRPC specifically.
 	Zstd zstd.DecoderConfig `mapstructure:"zstd"`
@@ -43,6 +52,8 @@ type ArrowConfig struct {
 type Config struct {
 	// Protocols is the configuration for gRPC and Arrow.
 	Protocols `mapstructure:"protocols"`
+	// Admission is the configuration for controlling amount of request memory entering the receiver.
+	Admission AdmissionConfig `mapstructure:"admission"`
 }
 
 var _ component.Config = (*Config)(nil)
@@ -54,3 +65,27 @@ func (cfg *ArrowConfig) Validate() error {
 	}
 	return nil
 }
+
+func (cfg *Config) Validate() error {
+	if err := cfg.GRPC.Validate(); err != nil {
+		return err
+	}
+	if err := cfg.Arrow.Validate(); err != nil {
+		return err
+	}
+	return nil
+}
+
+// Unmarshal will apply deprecated field values to assist the user with migration.
+func (cfg *Config) Unmarshal(conf *confmap.Conf) error {
+	if err := conf.Unmarshal(cfg); err != nil {
+		return err
+	}
+	if cfg.Admission.RequestLimitMiB == 0 && cfg.Arrow.DeprecatedAdmissionLimitMiB != 0 {
+		cfg.Admission.RequestLimitMiB = cfg.Arrow.DeprecatedAdmissionLimitMiB
+	}
+	if cfg.Admission.WaiterLimit == 0 && cfg.Arrow.DeprecatedWaiterLimit != 0 {
+		cfg.Admission.WaiterLimit = cfg.Arrow.DeprecatedWaiterLimit
+	}
+	return nil
+}

receiver/otelarrowreceiver/config_test.go

@@ -77,15 +77,41 @@ func TestUnmarshalConfig(t *testing.T) {
 					},
 				},
 				Arrow: ArrowConfig{
-					MemoryLimitMiB:    123,
-					AdmissionLimitMiB: 80,
-					WaiterLimit:       100,
+					MemoryLimitMiB: 123,
 				},
 			},
+			Admission: AdmissionConfig{
+				RequestLimitMiB: 80,
+				WaiterLimit:     100,
+			},
 		}, cfg)
 
 }
 
+// Tests that a deprecated config validation sets RequestLimitMiB and WaiterLimit in the correct config block.
+func TestValidateDeprecatedConfig(t *testing.T) {
+	cm, err := confmaptest.LoadConf(filepath.Join("testdata", "deprecated.yaml"))
+	require.NoError(t, err)
+	cfg := &Config{}
+	assert.NoError(t, cm.Unmarshal(cfg))
+	assert.NoError(t, cfg.Validate())
+	assert.Equal(t,
+		&Config{
+			Protocols: Protocols{
+				Arrow: ArrowConfig{
+					MemoryLimitMiB:              123,
+					DeprecatedAdmissionLimitMiB: 80,
+					DeprecatedWaiterLimit:       100,
+				},
+			},
+			Admission: AdmissionConfig{
+				// cfg.Validate should now set these fields.
+				RequestLimitMiB: 80,
+				WaiterLimit:     100,
+			},
+		}, cfg)
+}
+
 func TestUnmarshalConfigUnix(t *testing.T) {
 	cm, err := confmaptest.LoadConf(filepath.Join("testdata", "uds.yaml"))
 	require.NoError(t, err)
@@ -103,11 +129,13 @@ func TestUnmarshalConfigUnix(t *testing.T) {
 					ReadBufferSize: 512 * 1024,
 				},
 				Arrow: ArrowConfig{
-					MemoryLimitMiB:    defaultMemoryLimitMiB,
-					AdmissionLimitMiB: defaultAdmissionLimitMiB,
-					WaiterLimit:       defaultWaiterLimit,
+					MemoryLimitMiB: defaultMemoryLimitMiB,
 				},
 			},
+			Admission: AdmissionConfig{
+				RequestLimitMiB: defaultRequestLimitMiB,
+				WaiterLimit:     defaultWaiterLimit,
+			},
 		}, cfg)
 }
 

receiver/otelarrowreceiver/factory.go

@@ -19,9 +19,9 @@ import (
 const (
 	defaultGRPCEndpoint = "0.0.0.0:4317"
 
-	defaultMemoryLimitMiB    = 128
-	defaultAdmissionLimitMiB = defaultMemoryLimitMiB / 2
-	defaultWaiterLimit       = 1000
+	defaultMemoryLimitMiB  = 128
+	defaultRequestLimitMiB = 128
+	defaultWaiterLimit     = 1000
 )
 
 // NewFactory creates a new OTel-Arrow receiver factory.
@@ -47,11 +47,13 @@ func createDefaultConfig() component.Config {
 				ReadBufferSize: 512 * 1024,
 			},
 			Arrow: ArrowConfig{
-				MemoryLimitMiB:    defaultMemoryLimitMiB,
-				AdmissionLimitMiB: defaultAdmissionLimitMiB,
-				WaiterLimit:       defaultWaiterLimit,
+				MemoryLimitMiB: defaultMemoryLimitMiB,
 			},
 		},
+		Admission: AdmissionConfig{
+			RequestLimitMiB: defaultRequestLimitMiB,
+			WaiterLimit:     defaultWaiterLimit,
+		},
 	}
 }
 

receiver/otelarrowreceiver/internal/logs/otlp.go

@@ -7,8 +7,12 @@ import (
 	"context"
 
 	"go.opentelemetry.io/collector/consumer"
+	"go.opentelemetry.io/collector/pdata/plog"
 	"go.opentelemetry.io/collector/pdata/plog/plogotlp"
 	"go.opentelemetry.io/collector/receiver/receiverhelper"
+	"go.uber.org/zap"
+
+	"github.com/open-telemetry/opentelemetry-collector-contrib/internal/otelarrow/admission"
 )
 
 const dataFormatProtobuf = "protobuf"
@@ -18,13 +22,19 @@ type Receiver struct {
 	plogotlp.UnimplementedGRPCServer
 	nextConsumer consumer.Logs
 	obsrecv      *receiverhelper.ObsReport
+	boundedQueue *admission.BoundedQueue
+	sizer        *plog.ProtoMarshaler
+	logger       *zap.Logger
 }
 
 // New creates a new Receiver reference.
-func New(nextConsumer consumer.Logs, obsrecv *receiverhelper.ObsReport) *Receiver {
+func New(logger *zap.Logger, nextConsumer consumer.Logs, obsrecv *receiverhelper.ObsReport, bq *admission.BoundedQueue) *Receiver {
 	return &Receiver{
 		nextConsumer: nextConsumer,
 		obsrecv:      obsrecv,
+		boundedQueue: bq,
+		sizer:        &plog.ProtoMarshaler{},
+		logger:       logger,
 	}
 }
 
@@ -37,7 +47,19 @@ func (r *Receiver) Export(ctx context.Context, req plogotlp.ExportRequest) (plog
 	}
 
 	ctx = r.obsrecv.StartLogsOp(ctx)
-	err := r.nextConsumer.ConsumeLogs(ctx, ld)
+
+	sizeBytes := int64(r.sizer.LogsSize(req.Logs()))
+	err := r.boundedQueue.Acquire(ctx, sizeBytes)
+	if err != nil {
+		return plogotlp.NewExportResponse(), err
+	}
+	defer func() {
+		if releaseErr := r.boundedQueue.Release(sizeBytes); releaseErr != nil {
+			r.logger.Error("Error releasing bytes from semaphore", zap.Error(releaseErr))
+		}
+	}()
+
+	err = r.nextConsumer.ConsumeLogs(ctx, ld)
 	r.obsrecv.EndLogsOp(ctx, dataFormatProtobuf, numSpans, err)
 
 	return plogotlp.NewExportResponse(), err