feat(exporter-logs-otlp-proto): implements protobuf exporter for logs

experimental/CHANGELOG.md

@@ -10,6 +10,7 @@ All notable changes to experimental packages in this project will be documented
 
 ### :rocket: (Enhancement)
 
+* feat(exporter-logs-otlp-proto): protobuf exporter for logs. [#3779](https://github.com/open-telemetry/opentelemetry-js/pull/3779) @Abinet18
 * feat(instrumentation): add ESM support for instrumentation. [#3698](https://github.com/open-telemetry/opentelemetry-js/pull/3698) @JamieDanielson, @pkanal, @vmarchaud, @lizthegrey, @bengl
 * feat(exporter-logs-otlp-http): otlp-http exporter for logs. [#3764](https://github.com/open-telemetry/opentelemetry-js/pull/3764/) @fuaiyi
 * feat(otlp-trace-exporters): Add User-Agent header to OTLP trace exporters. [#3790](https://github.com/open-telemetry/opentelemetry-js/pull/3790) @JamieDanielson

experimental/packages/exporter-logs-otlp-proto/.eslintignore

@@ -0,0 +1 @@
+build

experimental/packages/exporter-logs-otlp-proto/.eslintrc.js

@@ -0,0 +1,8 @@
+module.exports = {
+    "env": {
+        "mocha": true,
+        "commonjs": true,
+        "node": true,
+    },
+    ...require('../../../eslint.config.js')
+}

experimental/packages/exporter-logs-otlp-proto/.npmignore

@@ -0,0 +1,4 @@
+/bin
+/coverage
+/doc
+/test

experimental/packages/exporter-logs-otlp-proto/LICENSE

@@ -0,0 +1,201 @@
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experimental/packages/exporter-logs-otlp-proto/README.md

@@ -0,0 +1,110 @@
+# An OTLP exporter to send logs using protobuf over HTTP
+
+[![NPM Published Version][npm-img]][npm-url]
+[![Apache License][license-image]][license-image]
+
+**Note: This is an experimental package under active development. New releases may include breaking changes.**
+
+This module provides an exporter for OTLP (http/json) logs using protocol version `v0.18`.
+
+## Installation
+
+```bash
+npm install --save @opentelemetry/exporter-logs-otlp-proto
+```
+
+## Further Documentation
+
+To see documentation and sample code for the traces exporter, as well as instructions for using TLS, see the [exporter-trace-otlp-proto package][trace-exporter-url].
+To see documentation and sample code for the metric exporter, see the [exporter-trace-otlp-proto package][metrics-exporter-url].
+
+## Example Setup
+
+```js
+const { LoggerProvider, SimpleLogRecordProcessor } = require('@opentelemetry/sdk-logs');
+const { OTLPLogsExporter } =  require('@opentelemetry/exporter-logs-otlp-proto');
+
+const collectorOptions = {
+  url: '<opentelemetry-collector-url>', // url is optional and can be omitted - default is http://localhost:4318/v1/logs
+  headers: {
+    foo: 'bar'
+  }, //an optional object containing custom headers to be sent with each request will only work with http
+};
+
+const logProvider = new LoggerProvider({resource: new Resource({'service.name': 'testApp'})});
+const logExporter = new OTLPLogsExporter(collectorOptions);
+logProvider.addLogRecordProcessor(new SimpleLogRecordProcessor(exporter));
+
+const logger = logProvider.getLogger('test_log_instrumentation');
+
+logger.emit({
+  //log data to emit
+})
+```
+
+## Exporter Timeout Configuration
+
+The OTLPLogsExporter has a timeout configuration option which is the maximum time, in milliseconds, the OTLP exporter will wait for each batch export. The default value is 10000ms.
+
+To override the default timeout duration, use the following options:
+
++ Set with environment variables:
+
+  | Environment variable         | Description |
+------------------------------|----------------------|-------------|
+  | OTEL_EXPORTER_OTLP_LOGS_TIMEOUT | The maximum waiting time, in milliseconds, allowed to send each OTLP trace batch. Default is 10000. |
+  | OTEL_EXPORTER_OTLP_TIMEOUT   | The maximum waiting time, in milliseconds, allowed to send each OTLP trace and metric batch. Default is 10000. |
+
+  > `OTEL_EXPORTER_OTLP_LOGS_TIMEOUT` takes precedence and overrides `OTEL_EXPORTER_OTLP_TIMEOUT`.
+
++ Provide `timeoutMillis` to OTLPLogsExporter with `collectorOptions`:
+
+  ```js
+  const collectorOptions = {
+    timeoutMillis: 15000,
+    url: '<opentelemetry-collector-url>', // url is optional and can be omitted - default is http://localhost:4318/v1/logs
+    headers: {
+      foo: 'bar'
+    }, //an optional object containing custom headers to be sent with each request will only work with http
+  };
+
+  const exporter = new OTLPLogsExporter(collectorOptions);
+  ```
+
+  > Providing `timeoutMillis` with `collectorOptions` takes precedence and overrides timeout set with environment variables.
+
+## OTLP Exporter Retry
+
+OTLP requires that transient errors be handled with a [retry strategy](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/protocol/exporter.md#retry).
+
+This retry policy has the following configuration, which there is currently no way to customize.
+
++ `DEFAULT_EXPORT_MAX_ATTEMPTS`: The maximum number of attempts, including the original request. Defaults to 5.
++ `DEFAULT_EXPORT_INITIAL_BACKOFF`: The initial backoff duration. Defaults to 1 second.
++ `DEFAULT_EXPORT_MAX_BACKOFF`: The maximum backoff duration. Defaults to 5 seconds.
++ `DEFAULT_EXPORT_BACKOFF_MULTIPLIER`: The backoff multiplier. Defaults to 1.5.
+
+This retry policy first checks if the response has a `'Retry-After'` header. If there is a `'Retry-After'` header, the exporter will wait the amount specified in the `'Retry-After'` header before retrying. If there is no `'Retry-After'` header, the exporter will use an exponential backoff with jitter retry strategy.
+
+  > The exporter will retry exporting within the [exporter timeout configuration](#Exporter-Timeout-Configuration) time.
+
+## Useful links
+
++ For more information on OpenTelemetry, visit: <https://opentelemetry.io/>
++ For more about OpenTelemetry JavaScript: <https://github.com/open-telemetry/opentelemetry-js>
++ For help or feedback on this project, join us in [GitHub Discussions][discussions-url]
+
+## License
+
+Apache 2.0 - See [LICENSE][license-url] for more information.
+
+[discussions-url]: https://github.com/open-telemetry/opentelemetry-js/discussions
+[license-url]: https://github.com/open-telemetry/opentelemetry-js/blob/main/LICENSE
+[license-image]: https://img.shields.io/badge/license-Apache_2.0-green.svg?style=flat
+[npm-url]: https://www.npmjs.com/package/@opentelemetry/exporter-logs-otlp-proto
+[npm-img]: https://badge.fury.io/js/%40opentelemetry%2Fexporter-logs-otlp-proto.svg
+[opentelemetry-collector-url]: https://github.com/open-telemetry/opentelemetry-collector
+[semconv-resource-service-name]: https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/resource/semantic_conventions/README.md#service
+[logs-exporter-url]: https://github.com/open-telemetry/opentelemetry-js/tree/main/experimental/packages/opentelemetry-exporter-logs-otlp-proto
+[trace-exporter-url]: https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/exporter-trace-otlp-proto
+[metrics-exporter-url]: https://github.com/open-telemetry/opentelemetry-js/tree/main/experimental/packages/opentelemetry-exporter-metrics-otlp-proto

experimental/packages/exporter-logs-otlp-proto/karma.conf.js

@@ -0,0 +1,26 @@
+/*!
+ * Copyright The OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const karmaWebpackConfig = require('../../../karma.webpack');
+const karmaBaseConfig = require('../../../karma.base');
+
+module.exports = (config) => {
+  config.set(Object.assign({}, karmaBaseConfig, {
+    webpack: karmaWebpackConfig,
+    files: ['test/browser/index-webpack.ts'],
+    preprocessors: { 'test/browser/index-webpack.ts': ['webpack'] }
+  }))
+};