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(otelarrowexporter): Create exporter per unique value of configured m…
…etadataKeys (open-telemetry#34827) **Description:** This PR forks open-telemetry#34235 and adds unit tests. **Link to tracking Issue:** open-telemetry#34178 --------- Co-authored-by: kristina.pathak <[email protected]> Co-authored-by: Joshua MacDonald <[email protected]>
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| # Use this changelog template to create an entry for release notes. | ||
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| # One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix' | ||
| change_type: enhancement | ||
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| # The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver) | ||
| component: otelarrowexporter | ||
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| # A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`). | ||
| note: Allow separate arrow exporter per unique value of configured metadataKeys. | ||
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| # Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists. | ||
| issues: [34178] | ||
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| # (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: | ||
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| # 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: [] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,203 @@ | ||
| // Copyright The OpenTelemetry Authors | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
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| package otelarrowexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/otelarrowexporter" | ||
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| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| "runtime" | ||
| "sort" | ||
| "strings" | ||
| "sync" | ||
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| arrowPkg "github.com/apache/arrow/go/v16/arrow" | ||
| "go.opentelemetry.io/collector/client" | ||
| "go.opentelemetry.io/collector/component" | ||
| "go.opentelemetry.io/collector/consumer/consumererror" | ||
| "go.opentelemetry.io/collector/exporter" | ||
| "go.opentelemetry.io/collector/pdata/plog" | ||
| "go.opentelemetry.io/collector/pdata/pmetric" | ||
| "go.opentelemetry.io/collector/pdata/ptrace" | ||
| "go.opentelemetry.io/otel/attribute" | ||
| "go.uber.org/multierr" | ||
| "google.golang.org/grpc/metadata" | ||
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| "github.com/open-telemetry/opentelemetry-collector-contrib/internal/otelarrow/compression/zstd" | ||
| "github.com/open-telemetry/opentelemetry-collector-contrib/internal/otelarrow/netstats" | ||
| ) | ||
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| var ( | ||
| // errTooManyExporters is returned when the MetadataCardinalityLimit has been reached. | ||
| errTooManyExporters = consumererror.NewPermanent(errors.New("too many exporter metadata-value combinations")) | ||
| ) | ||
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| type metadataExporter struct { | ||
| config *Config | ||
| settings exporter.Settings | ||
| scf streamClientFactory | ||
| host component.Host | ||
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| metadataKeys []string | ||
| exporters sync.Map | ||
| netReporter *netstats.NetworkReporter | ||
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| userAgent string | ||
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| // Guards the size and the storing logic to ensure no more than limit items are stored. | ||
| // If we are willing to allow "some" extra items than the limit this can be removed and size can be made atomic. | ||
| lock sync.Mutex | ||
| size int | ||
| } | ||
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| var _ exp = (*metadataExporter)(nil) | ||
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| func newMetadataExporter(cfg component.Config, set exporter.Settings, streamClientFactory streamClientFactory) (exp, error) { | ||
| oCfg := cfg.(*Config) | ||
| netReporter, err := netstats.NewExporterNetworkReporter(set) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| userAgent := fmt.Sprintf("%s/%s (%s/%s)", | ||
| set.BuildInfo.Description, set.BuildInfo.Version, runtime.GOOS, runtime.GOARCH) | ||
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| if !oCfg.Arrow.Disabled { | ||
| // Ignoring an error because Validate() was called. | ||
| _ = zstd.SetEncoderConfig(oCfg.Arrow.Zstd) | ||
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| userAgent += fmt.Sprintf(" ApacheArrow/%s (NumStreams/%d)", arrowPkg.PkgVersion, oCfg.Arrow.NumStreams) | ||
| } | ||
| // use lower-case, to be consistent with http/2 headers. | ||
| mks := make([]string, len(oCfg.MetadataKeys)) | ||
| for i, k := range oCfg.MetadataKeys { | ||
| mks[i] = strings.ToLower(k) | ||
| } | ||
| sort.Strings(mks) | ||
| if len(mks) == 0 { | ||
| return newExporter(cfg, set, streamClientFactory, userAgent, netReporter) | ||
| } | ||
| return &metadataExporter{ | ||
| config: oCfg, | ||
| settings: set, | ||
| scf: streamClientFactory, | ||
| metadataKeys: mks, | ||
| userAgent: userAgent, | ||
| netReporter: netReporter, | ||
| }, nil | ||
| } | ||
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| func (e *metadataExporter) getSettings() exporter.Settings { | ||
| return e.settings | ||
| } | ||
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| func (e *metadataExporter) getConfig() component.Config { | ||
| return e.config | ||
| } | ||
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| func (e *metadataExporter) start(_ context.Context, host component.Host) (err error) { | ||
| e.host = host | ||
| return nil | ||
| } | ||
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| func (e *metadataExporter) shutdown(ctx context.Context) error { | ||
| var err error | ||
| e.exporters.Range(func(_ any, value any) bool { | ||
| be := value.(exp) | ||
| err = multierr.Append(err, be.shutdown(ctx)) | ||
| return true | ||
| }) | ||
| return err | ||
| } | ||
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| func (e *metadataExporter) pushTraces(ctx context.Context, td ptrace.Traces) error { | ||
| s, mdata := e.getAttrSet(ctx, e.metadataKeys) | ||
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| be, err := e.getOrCreateExporter(ctx, s, mdata) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return be.pushTraces(ctx, td) | ||
| } | ||
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| func (e *metadataExporter) pushMetrics(ctx context.Context, md pmetric.Metrics) error { | ||
| s, mdata := e.getAttrSet(ctx, e.metadataKeys) | ||
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| be, err := e.getOrCreateExporter(ctx, s, mdata) | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| return be.pushMetrics(ctx, md) | ||
| } | ||
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| func (e *metadataExporter) pushLogs(ctx context.Context, ld plog.Logs) error { | ||
| s, mdata := e.getAttrSet(ctx, e.metadataKeys) | ||
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| be, err := e.getOrCreateExporter(ctx, s, mdata) | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| return be.pushLogs(ctx, ld) | ||
| } | ||
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| func (e *metadataExporter) getOrCreateExporter(ctx context.Context, s attribute.Set, md metadata.MD) (exp, error) { | ||
| e.lock.Lock() | ||
| defer e.lock.Unlock() | ||
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| if e.config.MetadataCardinalityLimit != 0 && e.size >= int(e.config.MetadataCardinalityLimit) { | ||
| return nil, errTooManyExporters | ||
| } | ||
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| v, ok := e.exporters.Load(s) | ||
| if ok { | ||
| return v.(exp), nil | ||
| } | ||
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| newExp, err := newExporter(e.config, e.settings, e.scf, e.userAgent, e.netReporter) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to create exporter: %w", err) | ||
| } | ||
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| var loaded bool | ||
| v, loaded = e.exporters.LoadOrStore(s, newExp) | ||
| if !loaded { | ||
| // set metadata keys for base exporter to add them to the outgoing context. | ||
| newExp.(*baseExporter).setMetadata(md) | ||
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| // Start the goroutine only if we added the object to the map, otherwise is already started. | ||
| err = newExp.start(ctx, e.host) | ||
| if err != nil { | ||
| e.exporters.Delete(s) | ||
| return nil, fmt.Errorf("failed to start exporter: %w", err) | ||
| } | ||
|
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| e.size++ | ||
| } | ||
|
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| return v.(exp), nil | ||
| } | ||
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| // getAttrSet is code taken from the core collector's batchprocessor multibatch logic. | ||
| // https://github.com/open-telemetry/opentelemetry-collector/blob/v0.107.0/processor/batchprocessor/batch_processor.go#L298 | ||
| func (e *metadataExporter) getAttrSet(ctx context.Context, keys []string) (attribute.Set, metadata.MD) { | ||
| // Get each metadata key value, form the corresponding | ||
| // attribute set for use as a map lookup key. | ||
| info := client.FromContext(ctx) | ||
| md := map[string][]string{} | ||
| var attrs []attribute.KeyValue | ||
| for _, k := range keys { | ||
| // Lookup the value in the incoming metadata, copy it | ||
| // into the outgoing metadata, and create a unique | ||
| // value for the attributeSet. | ||
| vs := info.Metadata.Get(k) | ||
| md[k] = vs | ||
| if len(vs) == 1 { | ||
| attrs = append(attrs, attribute.String(k, vs[0])) | ||
| } else { | ||
| attrs = append(attrs, attribute.StringSlice(k, vs)) | ||
| } | ||
| } | ||
| return attribute.NewSet(attrs...), metadata.MD(md) | ||
| } |
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