├── .env ├── .github ├── CODEOWNERS └── workflows │ └── ci.yml ├── .gitignore ├── .gitlab-ci.yml ├── .npmignore ├── CHANGELOG.md ├── README.md ├── context.json ├── event.json ├── event_sources.json ├── noop-metric-helpers.js ├── package-lock.json ├── package.json ├── signalfx-async-wrapper.js ├── signalfx-helper.js ├── signalfx-lambda.js ├── signalfx-transform-helper.js ├── signalfx-wrapper.js ├── spec ├── agent.js ├── config │ └── jasmine.json ├── helpers │ └── terminal-reporter.js ├── signalfx-helper-spec.js ├── signalfx-transform-helper-spec.js └── tracing-spec.js ├── test.js ├── test2.js ├── test3.js └── tracing.js /.env: -------------------------------------------------------------------------------- 1 | AWS_ENVIRONMENT= 2 | AWS_PROFILE= 3 | AWS_SESSION_TOKEN= 4 | AWS_HANDLER=test.handler 5 | AWS_MEMORY_SIZE=128 6 | AWS_TIMEOUT=3 7 | AWS_DESCRIPTION= 8 | AWS_RUNTIME=nodejs12.x 9 | AWS_VPC_SUBNETS= 10 | AWS_VPC_SECURITY_GROUPS= 11 | AWS_TRACING_CONFIG= 12 | EXCLUDE_GLOBS="event.json" 13 | PACKAGE_DIRECTORY=build 14 | 15 | AWS_REGION=us-east-1 16 | AWS_FUNCTION_NAME=signalfx-lambda-wrapper-test 17 | AWS_ROLE_ARN=arn:aws:iam::134183635603:role/sfinfra_lambda -------------------------------------------------------------------------------- /.github/CODEOWNERS: -------------------------------------------------------------------------------- 1 | * @signalfx/gdi-js-maintainers @signalfx/gdi-js-approvers 2 | -------------------------------------------------------------------------------- /.github/workflows/ci.yml: -------------------------------------------------------------------------------- 1 | name: Continuous Integration 2 | on: 3 | pull_request: 4 | push: 5 | branches: 6 | - master 7 | permissions: read-all 8 | 9 | jobs: 10 | unit-tests: 11 | runs-on: ubuntu-latest 12 | permissions: read-all 13 | strategy: 14 | fail-fast: false 15 | matrix: 16 | nodejs: ['10', '12'] 17 | steps: 18 | - name: Checkout 19 | uses: actions/checkout@v1 20 | - uses: actions/setup-node@v2 21 | with: 22 | node-version: ${{ matrix.nodejs }} 23 | - run: npm ci 24 | - name: Test 25 | run: npm run test 26 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | deploy.env 2 | .lambda 3 | build 4 | node_modules 5 | *.tgz 6 | .idea 7 | /dist/ 8 | -------------------------------------------------------------------------------- /.gitlab-ci.yml: -------------------------------------------------------------------------------- 1 | default: 2 | image: 'cimg/node:lts' 3 | 4 | cache: 5 | key: 6 | files: 7 | - package-lock.json 8 | paths: 9 | - .npm/ 10 | - node_modules/ 11 | 12 | stages: 13 | - setup 14 | - test 15 | - release 16 | 17 | install: 18 | stage: setup 19 | script: 20 | - npm ci 21 | 22 | test: 23 | stage: test 24 | script: 25 | - npm test 26 | 27 | release: 28 | stage: release 29 | artifacts: 30 | paths: 31 | - dist/ 32 | only: 33 | - /^v[0-9]+\.[0-9]+\.[0-9]+.*/ 34 | except: 35 | - branches 36 | script: 37 | - npm pack 38 | - mkdir dist 39 | - mv signalfx-lambda-${CI_COMMIT_REF_NAME:1}.tgz dist/ 40 | - shasum -a 256 dist/* > dist/checksums.txt 41 | 42 | # release in NPM 43 | - echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN_SIGNALFX" > ~/.npmrc 44 | - npm publish ./dist/signalfx-lambda-${CI_COMMIT_REF_NAME:1}.tgz 45 | - rm -f ~/.npmrc 46 | -------------------------------------------------------------------------------- /.npmignore: -------------------------------------------------------------------------------- 1 | node_modules 2 | .npmignore 3 | context.json 4 | *.tgz 5 | *.zip 6 | *.env 7 | *.json 8 | test* 9 | build 10 | .lambda 11 | -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | # Changelog 2 | 3 | ## Unreleased 4 | 5 | ## 1.1.1 (2021-09-20) 6 | 7 | Changes: 8 | - allow usage of nulls and booleans as dimension values ([#45](https://github.com/signalfx/lambda-nodejs/pull/45)) 9 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | >ℹ️  SignalFx was acquired by Splunk in October 2019. See [Splunk SignalFx](https://www.splunk.com/en_us/investor-relations/acquisitions/signalfx.html) for more information. 2 | 3 | > # :warning: Deprecation Notice 4 | > **The SignalFx Node.js Lambda Wrapper has reached End of Support and has been permanently archived.** 5 | > 6 | > [The Splunk OpenTelemetry Lambda Layer](https://github.com/signalfx/splunk-otel-lambda) is the successor. To learn how to migrate, see [the supporting documentation](https://docs.splunk.com/Observability/gdi/get-data-in/serverless/aws/otel-lambda-layer/instrument-lambda-functions.html#nav-Instrument-your-Lambda-function) 7 | 8 | --- 9 | 10 |

11 | GitHub branch checks state 12 | npm 13 |

14 | 15 | # SignalFx Node.js Lambda Wrapper 16 | 17 | ## Overview 18 | 19 | You can use this document to add a SignalFx wrapper to your AWS Lambda for Node.js. 20 | 21 | The SignalFx Node.js Lambda Wrapper wraps around an AWS Lambda Node.js function handler, which allows metrics and traces to be sent to SignalFx. 22 | 23 | At a high-level, to add a SignalFx Node.js Lambda wrapper, you can: 24 | * Package the code yourself; or 25 | * Use a Lambda layer containing the wrapper, and then attach the layer to a Lambda function. 26 | 27 | To learn more about Lambda Layers, please visit the [AWS documentation site](https://docs.aws.amazon.com/lambda/latest/dg/configuration-layers.html). 28 | 29 | ## Step 1: Add the Lambda wrapper in AWS 30 | 31 | To add the SignalFx wrapper, you have the following options: 32 | 33 | * Option 1: In AWS, create a Lambda function, then attach a SignalFx-hosted layer with a wrapper. 34 | * If you are already using Lambda layers, then SignalFx recommends that you follow this option. 35 | * In this option, you will use a Lambda layer created and hosted by SignalFx. 36 | * Option 2: In AWS, create a Lambda function, then create and attach a layer based on a SignalFx SAM (Serverless Application Model) template. 37 | * If you are already using Lambda layers, then SignalFx also recommends that you follow this option. 38 | * In this option, you will choose a SignalFx template, and then deploy a copy of the layer. 39 | * Option 3: Use the wrapper as a regular dependency, and then create a Lambda function based on your artifact containing both code and dependencies. 40 | 41 | For advanced users who want to reduce the size of deployment packages, you can use the wrapper as a developer dependency, but in production, you would add the wrapper to layer in the Lambda environment. This option allows you to work with the wrapper in a local setting and reduce the size of deployment packages at the same time. Please note that this option is not fully documented. 42 | 43 | ### Option 1: Create a Lambda function, then attach the SignalFx-hosted Lambda layer 44 | 45 | In this option, you will use a Lambda layer created and hosted by SignalFx. 46 | 47 | 1. To verify compatibility, review the list of supported regions. See [Lambda Layer Versions](https://github.com/signalfx/lambda-layer-versions/blob/master/node/NODE.md). 48 | 2. Open your AWS console.  49 | 3. In the landing page, under **Compute**, click **Lambda**. 50 | 4. Click **Create function** to create a layer with SignalFx's capabilities. 51 | 5. Click **Author from scratch**. 52 | 6. In **Function name**, enter a descriptive name for the wrapper.  53 | 7. In **Runtime**, select the desired language. 54 | 8. Click **Create function**.  55 | 9. Click **Layers**, then add a layer. 56 | 10. Mark **Provide a layer version**. 57 | 11. Enter an ARN number. 58 | * To locate the ARN number, see [Lambda Layer Versions](https://github.com/signalfx/lambda-layer-versions/blob/master/node/NODE.md). 59 | 60 | ### Option 2: Create a Lambda function, then create and attach a layer based on a SignalFx template 61 | 62 | In this option, you will choose a SignalFx template, and then deploy a copy of the layer. 63 | 64 | 1. Open your AWS console. 65 | 2. In the landing page, under **Compute**, click **Lambda**. 66 | 3. Click **Create function** to create a layer with SignalFx's capabilities. 67 | 4. Click **Browse serverless app repository**. 68 | 5. Click **Public applications**. 69 | 6. In the search field, enter and select **wrapper-node-sfx-app**. 70 | 7. Review the template, permissions, licenses, and then click **Deploy**. 71 | * A copy of the layer will now be deployed into your account. 72 | 8. Return to the previous screen to add a layer to the function, select from list of runtime compatible layers, and then select the name of the copy. 73 | 74 | ### Option 3: Install the wrapper package with npm 75 | 76 | Run the following installation script in your command line to install latest version of the wrapper: 77 | 78 | ```javascript 79 | npm install signalfx-lambda 80 | ``` 81 | Make sure the package is saved to your package.json. (Newer versions of npm perform this function automatically.) 82 | 83 | ## Step 2: Locate the ingest endpoint 84 | 85 | By default, this function wrapper will send data to the us0 realm. As a result, if you are not in the us0 realm and you want to use the ingest endpoint directly, then you must explicitly set your realm. 86 | 87 | To locate your realm: 88 | 89 | 1. Open SignalFx and in the top, right corner, click your profile icon. 90 | 2. Click **My Profile**. 91 | 3. Next to **Organizations**, review the listed realm. 92 | 93 | To set your realm, use a subdomain, such as ingest.us1.signalfx.com or ingest.eu0.signalfx.com. You will use the realm subdomain to set SIGNALFX_ENDPOINT_URL and SIGNALFX_METRICS_URL variables in the next step. 94 | 95 | ## Step 3: Set environment variables 96 | 97 | 1. Set SIGNALFX_ACCESS_TOKEN with your correct access token. Review the following example. 98 | ```bash 99 | SIGNALFX_ACCESS_TOKEN=access-token 100 | ``` 101 | 2. Set the service name and environment name as in the following example: 102 | ``` 103 | SIGNALFX_SERVICE_NAME= 104 | SIGNALFX_SPAN_TAGS=deployment.environment: 105 | ``` 106 | 3. If you use OpenTelemetry Collector, or want to ingest directly from a realm other than us0, then you must set at least one endpoint variable. (For environment variables, SignalFx defaults to the us0 realm. As a result, if you are not in the us0 realm, you may need to set your environment variables.) There are two options: 107 | 108 | 109 | ### Option 1. 110 | 111 | You can update SIGNALFX_ENDPOINT_URL and SIGNALFX_METRICS_URL where traces will be sent to the Otel collector and metrics will go directly to the ingest endpoint, respectively. 112 | 113 | ```bash 114 | SIGNALFX_METRICS_URL=https://ingest..signalfx.com 115 | SIGNALFX_ENDPOINT_URL=http://:9411/api/v2/spans 116 | ``` 117 | 118 | Note that the you'll need to specify the full path when sending to Otel collector i.e, `http://:9411/api/v2/spans. 119 | 120 | ### Option 2. 121 | 122 | You can update SIGNALFX_ENDPOINT_URL and SIGNALFX_METRICS_URL to send spans and metrics respectively directly to the SignalFx backend. Refer step 2 above (locate the ingest endpoint) to figure out the SignalFx ingest URL. 123 | 124 | 125 | ```bash 126 | SIGNALFX_METRICS_URL=https://ingest..signalfx.com 127 | SIGNALFX_ENDPOINT_URL=https://ingest..signalfx.com/v2/trace 128 | ``` 129 | 130 | To learn more, see: 131 | [Deploying the OpenTelemetry Collector](https://docs.signalfx.com/en/latest/apm/apm-getting-started/apm-opentelemetry-collector.html) 132 | 133 | 3. (Optional) Update SIGNALFX_SEND_TIMEOUT. Review the following example. 134 | ```bash 135 | SIGNALFX_SEND_TIMEOUT=milliseconds for signalfx client timeout [1000] 136 | ``` 137 | 138 | 4. (Optional) Globally disable metrics or tracing by setting SIGNALFX_TRACING_ENABLED and/or SIGNALFX_METRICS_ENABLED to "false". 139 | ```bash 140 | SIGNALFX_TRACING_ENABLED=false [defaults to true] 141 | SIGNALFX_METRICS_ENABLED=false [defaults to true] 142 | ``` 143 | 144 | ## Step 4: Wrap a function 145 | 146 | 1. Wrap your function handler to enable both metrics and traces. Review the following example. 147 | ```js 148 | 'use strict'; 149 | 150 | const signalFxLambda = require('signalfx-lambda'); 151 | 152 | exports.handler = signalFxLambda.wrapper((event, context, callback) => { 153 | ... 154 | }); 155 | ``` 156 | 157 | You can also use `signalFxLambda.wrapperMetrics` or `signalFxLambda.wrapperTracing` to enable only either metrics or tracing. 158 | 159 | 2. Use async/await. Review the following example. 160 | ```js 161 | 'use strict'; 162 | 163 | const signalFxLambda = require('signalfx-lambda'); 164 | 165 | exports.handler = signalFxLambda.asyncWrapper(async (event, context) => { 166 | ... 167 | }); 168 | ``` 169 | 170 | You can also use `signalFxLambda.asyncWrapperMetrics` or `signalFxLambda.asyncWrapperTracing` to enable only either metrics or tracing. 171 | 172 | ## (Optional) Step 5: Send custom metrics from a Lambda function 173 | 174 | 1. If you use synchronous wrapper, review the following example. 175 | 176 | ```js 177 | 'use strict'; 178 | 179 | const signalFxLambda = require('signalfx-lambda'); 180 | 181 | exports.handler = signalFxLambda.wrapper((event, context, callback) => { 182 | ... 183 | signalFxLambda.helper.sendGauge('gauge.name', value); 184 | callback(null, 'Done'); 185 | }); 186 | ``` 187 | 188 | 2. If you use `async/await`, review the following example. 189 | ```js 190 | 'use strict'; 191 | 192 | const signalFxLambda = require('signalfx-lambda'); 193 | 194 | exports.handler = signalFxLambda.asyncWrapper(async (event, context) => { 195 | ... 196 | signalFxLambda.helper.sendGauge('gauge.name', value); 197 | }); 198 | ``` 199 | 200 | ## (Optional) Step 6: Send custom events or CloudWatch events from a Lambda function 201 | 202 | 1. If you use synchronous wrapper, review the following example. 203 | 204 | ```js 205 | 'use strict'; 206 | 207 | const signalFxLambda = require('signalfx-lambda'); 208 | 209 | exports.handler = signalFxLambda.wrapper((event, context, callback) => { 210 | ... 211 | // to send custom event: 212 | signalFxLambda.helper.sendCustomEvent('Custom', {functionName: context.functionName}, {description: 'Custom event'}); 213 | 214 | // to transform & forward CloudWatch event: 215 | signalFxLambda.helper.sendCloudWatchEvent(event); 216 | 217 | callback(null, 'Done'); 218 | }); 219 | ``` 220 | 221 | 2. If you use `async/await`, review the following example. 222 | ```js 223 | 'use strict'; 224 | 225 | const signalFxLambda = require('signalfx-lambda'); 226 | 227 | exports.handler = signalFxLambda.asyncWrapper(async (event, context) => { 228 | ... 229 | // to send custom event: 230 | signalFxLambda.helper.sendCustomEvent('Custom', {functionName: context.functionName}, {description: 'Custom event'}); 231 | 232 | // to transform & forward CloudWatch event: 233 | signalFxLambda.helper.sendCloudWatchEvent(event); 234 | ... 235 | }); 236 | ``` 237 | For additional examples see [sample functions forwarding events to SignalFx](https://github.com/signalfx/cloudwatch-event-forwarder/blob/master/examples). 238 | 239 | 240 | ## Additional information and optional steps 241 | 242 | ### Metrics and dimensions sent by the wrapper 243 | 244 | The Lambda wrapper sends the following metrics to SignalFx: 245 | 246 | | Metric Name | Type | Description | 247 | | ------------- | ------------- | ---| 248 | | function.invocations | Counter | Count number of Lambda invocations| 249 | | function.cold_starts | Counter | Count number of cold starts| 250 | | function.errors | Counter | Count number of errors from underlying Lambda handler| 251 | | function.duration | Gauge | Milliseconds in execution time of underlying Lambda handler| 252 | 253 | The Lambda wrapper adds the following dimensions to all data points sent to SignalFx: 254 | 255 | | Dimension | Description | 256 | | ------------- | ---| 257 | | lambda_arn | ARN of the Lambda function instance | 258 | | aws_region | AWS Region | 259 | | aws_account_id | AWS Account ID | 260 | | aws_function_name | AWS Function Name | 261 | | aws_function_version | AWS Function Version | 262 | | aws_function_qualifier | AWS Function Version Qualifier (version or version alias if it is not an event source mapping Lambda invocation) | 263 | | event_source_mappings | AWS Function Name (if it is an event source mapping Lambda invocation) | 264 | | aws_execution_env | AWS execution environment (e.g. AWS_Lambda_nodejs10.x) | 265 | | function_wrapper_version | SignalFx function wrapper qualifier (e.g. signalfx-lambda-0.0.9) | 266 | | metric_source | The literal value of 'lambda_wrapper' | 267 | 268 | ### Tags sent by the tracing wrapper 269 | 270 | The tracing wrapper creates a span for the wrapper handler. This span contains the following tags: 271 | 272 | | Tag | Description | 273 | |-|-| 274 | | aws_request_id | AWS Request ID | 275 | | lambda_arn | ARN of the Lambda function instance | 276 | | aws_region | AWS region | 277 | | aws_account_id | AWS account ID | 278 | | aws_function_name | AWS function name | 279 | | aws_function_version | AWS function version | 280 | | aws_function_qualifier | AWS function version qualifier (version or version alias if it is not an event source mapping Lambda invocation) | 281 | | event_source_mappings | AWS function name (if it is an event source mapping Lambda invocation) | 282 | | aws_execution_env | AWS execution environment (e.g., AWS_Lambda_nodejs12.x) | 283 | | function_wrapper_version | SignalFx function wrapper qualifier (e.g., signalfx_lambda_0.0.2) | 284 | | component | The literal value of 'nodejs-lambda-wrapper' | 285 | 286 | ### Adding Extra Tags 287 | 288 | Extra tags can be added to all spans by setting the `SIGNALFX_SPAN_TAGS` environment variable to a comma-separated string of key value pairs. 289 | For example, if you set `SIGNALFX_SPAN_TAGS` environment variable to `environment: production, build_id: 5842`, then all spans generated by the 290 | Lambda function (both manual and ones generated by auto-instrumentation) will contain the following tags: 291 | 292 | ``` 293 | environment = production 294 | build_id = 5843 295 | ``` 296 | 297 | #### Adding tags manually 298 | 299 | If you want to add extra tags to specific spans instead of all spans, use the following snippet **inside** your lambda handler (i.e. this code has to run during lambda handler invocation, not as a part of the cold start logic): 300 | 301 | ```js 302 | const tracing = require("signalfx-lambda/tracing"); 303 | 304 | // this sample uses asyncWrapper but the logic is the same when 305 | // the synchronous wrapper is used 306 | exports.handler = signalFxLambda.asyncWrapper(async (event, context) => { 307 | const tracer = tracing.tracer(); 308 | tracer.scope().active().setTag("my-custom-tag", "some-value"); 309 | }); 310 | ``` 311 | ### Trace context propagation 312 | 313 | The wrapper provides some support for trace context propagation across service boundaries. By default, you can propagate trace context across Lambda boundaries in these situations: 314 | - Events are coming in from an Amazon API Gateway and outgoing requests use HTTP/S. 315 | - You programatically execute events with a payload that includes B3-compatible key-value pairs in `headers`. 316 | 317 | Other situations, such as receiving requests from Amazon CloudFront or sending output to Lambda destinations, aren't supported by default. In these cases, configure trace context propagation manually. 318 | 319 | This example shows you how to manually configure trace context propagation when you're calling another service using a method that's not HTTP/S: 320 | 321 | ```javascript 322 | const tracing = require("signalfx-lambda/tracing"); 323 | 324 | // this sample uses asyncWrapper but the logic is the same when 325 | // the synchronous wrapper is used 326 | exports.handler = signalFxLambda.asyncWrapper(async (event, context) => { 327 | const contextCarrier = {}; // any writeable object 328 | tracing.inject(contextCarrier); 329 | // contextCarrier is now extended with "X-B3-*" fields, which should be extracted on the receiving end 330 | // no fields will be added unless there's an active span at the time when inject() is called 331 | 332 | // inject contextCarrier such that it can be accessed as `event.headers` from within the invoked lambda. 333 | }); 334 | ``` 335 | 336 | `contextCarrier` must be injected into the headers or payload of your outgoing request. Context propagation will work correctly as long as the context you injected can be accessed as `event.headers` from within the invoked Lambda. 337 | 338 | ### Asynchronous Metrics and Events Delivery 339 | 340 | Although the following `signalFxLambda.helper.send*` methods all return promises that resolve when send operation completes it is recommended to ignore those promises as the wrapper is going to wait for their completion internally. 341 | 342 | This way multiple send operations may run concurrently without blocking your lambda handler code. 343 | 344 | You can still await any of those promises if your use case forces you to do so. 345 | 346 | ```js 347 | function sendGauge(metricName, metricValue, dimensions); 348 | function sendCounter(metricName, metricValue, dimensions); 349 | function sendCustomEvent(type, dimensions, properties, timestamp); 350 | function sendCloudWatchEvent(cwevent); 351 | ``` 352 | 353 | ### Deployment 354 | 355 | 1. Run `npm pack` to package the module with the configuration in `package.json`. 356 | 357 | ### Test 358 | 359 | 1. Install node-lambda via `npm install -g node-lambda` (globally) or `npm install node-lambda` (locally). 360 | 361 | #### Test locally 362 | 363 | 1. Create deploy.env to submit data to SignalFx, which will include the required and optional environment variables mentioned above. 364 | 365 | 2. Run `node-lambda run -f deploy.env`. 366 | 367 | #### Test from AWS 368 | 369 | 1. Run `node-lambda deploy -f deploy.env` to deploy to AWS, which will use any environment variables configured in `.env`. For example: 370 | 371 | #### Unit Tests in IntelliJ IDEA 372 | 373 | 1. Install Jasmine IDE plugin 374 | 375 | 2. Create a new run configuration and point it to Jasmine config file `.../signalfx/lambda-nodejs/spec/config/jasmine.json` 376 | 377 | ``` 378 | AWS_ENVIRONMENT= 379 | AWS_PROFILE= 380 | AWS_SESSION_TOKEN= 381 | AWS_HANDLER=index.handler 382 | AWS_MEMORY_SIZE=128 383 | AWS_TIMEOUT=3 384 | AWS_DESCRIPTION= 385 | AWS_RUNTIME=nodejs10.x 386 | AWS_VPC_SUBNETS= 387 | AWS_VPC_SECURITY_GROUPS= 388 | AWS_TRACING_CONFIG= 389 | AWS_REGION=us-east-2 390 | AWS_FUNCTION_NAME=my-function 391 | AWS_ROLE_ARN=arn:aws:iam::someAccountId:role/someRole 392 | PACKAGE_DIRECTORY=build 393 | ``` 394 | 395 | ### License 396 | 397 | Apache Software License v2. Copyright © 2014-2020 Splunk, Inc. 398 | -------------------------------------------------------------------------------- /context.json: -------------------------------------------------------------------------------- 1 | {"invokedFunctionArn":"arn:aws:lambda:us-east-1:123456789012:function:ProcessKinesisRecords:1.0"} -------------------------------------------------------------------------------- /event.json: -------------------------------------------------------------------------------- 1 | { 2 | "key": "value", 3 | "key2": "value2", 4 | "other_key": "other_value", 5 | "my_test_value": "correct" 6 | } -------------------------------------------------------------------------------- /event_sources.json: -------------------------------------------------------------------------------- 1 | { 2 | "EventSourceMappings": [ 3 | { 4 | "EventSourceArn": "your event source arn", 5 | "StartingPosition": "LATEST", 6 | "BatchSize": 100, 7 | "Enabled": true 8 | } 9 | ], 10 | "ScheduleEvents": [ 11 | { 12 | "ScheduleName": "node-lambda-test-schedule", 13 | "ScheduleState": "ENABLED", 14 | "ScheduleExpression": "rate(1 hour)" 15 | } 16 | ] 17 | } 18 | -------------------------------------------------------------------------------- /noop-metric-helpers.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | module.exports = { 4 | sendGauge: function addGauge() { 5 | return Promise.resolve(); 6 | }, 7 | 8 | sendCounter: function addCounter() { 9 | return Promise.resolve(); 10 | }, 11 | 12 | waitForAllSends: function waitForAllSends() { 13 | return Promise.resolve(); 14 | }, 15 | }; 16 | -------------------------------------------------------------------------------- /package-lock.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "signalfx-lambda", 3 | "version": "1.1.1", 4 | "lockfileVersion": 1, 5 | "requires": true, 6 | "dependencies": { 7 | 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"main": "signalfx-lambda", 17 | "dependencies": { 18 | "signalfx": "^7.4.0", 19 | "signalfx-tracing": "^0.13.0" 20 | }, 21 | "devDependencies": { 22 | "chai": "^4.3.4", 23 | "express": "^4.17.1", 24 | "get-port": "^5.1.1", 25 | "int64-buffer": "^1.0.1", 26 | "jasmine": "^3.8.0", 27 | "jasmine-terminal-reporter": "^1.0.3", 28 | "mock-require": "^3.0.3", 29 | "node-lambda": "^0.19.1", 30 | "sinon": "^11.1.1" 31 | }, 32 | "repository": { 33 | "type": "git", 34 | "url": "https://github.com/signalfx/lambda-nodejs" 35 | }, 36 | "scripts": { 37 | "test": "jasmine --config=spec/config/jasmine.json", 38 | "test:integration": "node-lambda run -f deploy.env" 39 | } 40 | } 41 | -------------------------------------------------------------------------------- /signalfx-async-wrapper.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | var tracing = require("./tracing"); 4 | const sfxHelper = require("./signalfx-helper"); 5 | const noopMetricSender = require("./noop-metric-helpers"); 6 | 7 | let coldStart = true; 8 | 9 | class SignalFxWrapper { 10 | constructor( 11 | originalObj, 12 | originalFn, 13 | originalEvent, 14 | originalContext, 15 | originalCallback, 16 | dimensions, 17 | disableTracing, 18 | disableMetrics 19 | ) { 20 | this.originalObj = originalObj; 21 | this.originalFn = originalFn; 22 | this.originalEvent = originalEvent; 23 | this.originalContext = originalContext; 24 | this.originalCallback = originalCallback; 25 | this.disableMetrics = sfxHelper.isMetricsDisabled(disableMetrics); 26 | this.disableTracing = sfxHelper.isTracingDisabled(disableTracing); 27 | 28 | tracing.init(this.disableTracing); 29 | this.metricSender = sfxHelper; 30 | if (this.disableMetrics) { 31 | this.metricSender = noopMetricSender; 32 | } 33 | 34 | this.execMeta = sfxHelper.getExecutionMetadata(this.originalContext); 35 | sfxHelper.setDefaultDimensions(dimensions, this.execMeta); 36 | 37 | this.metricSender.sendCounter("function.invocations", 1); 38 | if (coldStart) { 39 | this.metricSender.sendCounter("function.cold_starts", 1); 40 | coldStart = false; 41 | } 42 | return this; 43 | } 44 | 45 | async invoke() { 46 | const tracer = tracing.tracer(this.disableTracing); 47 | const span = tracing.startSpan(tracer, this.originalEvent, this.execMeta); 48 | 49 | const startTime = new Date().getTime(); 50 | let sent; 51 | const flush = async () => { 52 | if (sent) { 53 | return; 54 | } 55 | 56 | this.metricSender.sendGauge( 57 | "function.duration", 58 | new Date().getTime() - startTime 59 | ); 60 | sent = true; 61 | 62 | await Promise.all([tracing.flush(), sfxHelper.waitForAllSends()]); 63 | }; 64 | 65 | const callbackWrapper = (err, result) => { 66 | flush().then(() => { 67 | this.originalCallback(err, result); 68 | }); 69 | }; 70 | 71 | return tracer.scope().activate(span, async () => { 72 | try { 73 | return await this.originalFn.call( 74 | this.originalObj, 75 | this.originalEvent, 76 | this.originalContext, 77 | callbackWrapper 78 | ); 79 | } catch (err) { 80 | this.metricSender.sendCounter("function.errors", 1); 81 | span.addTags({ 82 | "sfx.error.kind": err.name, 83 | "sfx.error.message": err.message, 84 | "sfx.error.stack": err.stack, 85 | }); 86 | throw err; 87 | } finally { 88 | span.finish(); 89 | await flush(); 90 | } 91 | }); 92 | } 93 | } 94 | 95 | module.exports = (originalFn, dimensions, disableTracing, disableMetrics) => { 96 | return async function (originalEvent, originalContext, originalCallback) { 97 | const self = this; 98 | 99 | const signalFxWrapper = new SignalFxWrapper( 100 | self, 101 | originalFn, 102 | originalEvent, 103 | originalContext, 104 | originalCallback, 105 | dimensions, 106 | disableTracing, 107 | disableMetrics 108 | ); 109 | 110 | const result = await signalFxWrapper.invoke(); 111 | return result; 112 | }; 113 | }; 114 | -------------------------------------------------------------------------------- /signalfx-helper.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | const signalfx = require("signalfx"); 4 | const extractDetailsForSfx = require("./signalfx-transform-helper") 5 | .extractDetailsForSfx; 6 | 7 | const packageFile = require("./package.json"); 8 | 9 | let ACCESS_TOKEN = process.env.SIGNALFX_ACCESS_TOKEN; 10 | if (!ACCESS_TOKEN && process.env.SIGNALFX_AUTH_TOKEN) { 11 | console.log('SIGNALFX_AUTH_TOKEN is deprecated. Please use SIGNALFX_ACCESS_TOKEN instead'); 12 | ACCESS_TOKEN = process.env.SIGNALFX_AUTH_TOKEN; 13 | } 14 | 15 | let METRICS_INGEST_ENDPOINT = process.env.SIGNALFX_METRICS_URL || process.env.SIGNALFX_ENDPOINT_URL; 16 | if (!METRICS_INGEST_ENDPOINT && process.env.SIGNALFX_INGEST_ENDPOINT) { 17 | console.log('SIGNALFX_INGEST_ENDPOINT is deprecated. Please use SIGNALFX_ENDPOINT_URL instead'); 18 | METRICS_INGEST_ENDPOINT = process.env.SIGNALFX_INGEST_ENDPOINT; 19 | } 20 | 21 | const TIMEOUT_MS = process.env.SIGNALFX_SEND_TIMEOUT; 22 | 23 | const CLOUDWATCH_EVENT_TYPE = "CloudWatch"; 24 | 25 | const CLIENT_OPTIONS = {}; 26 | if (METRICS_INGEST_ENDPOINT) { 27 | CLIENT_OPTIONS.ingestEndpoint = METRICS_INGEST_ENDPOINT; 28 | } else { 29 | CLIENT_OPTIONS.ingestEndpoint = "https://pops.signalfx.com"; 30 | } 31 | 32 | const timeoutMs = Number(TIMEOUT_MS); 33 | if (!isNaN(timeoutMs)) { 34 | CLIENT_OPTIONS.timeout = timeoutMs; 35 | } else { 36 | CLIENT_OPTIONS.timeout = 300; 37 | } 38 | 39 | let defaultDimensions; 40 | let sendPromises = []; 41 | 42 | const metricSender = new signalfx.IngestJson(ACCESS_TOKEN, CLIENT_OPTIONS); 43 | 44 | function handleSend(sendPromise) { 45 | sendPromises.push(sendPromise); 46 | return sendPromise.catch((err) => { 47 | if (err) { 48 | console.error("Could not send data to SignalFx!", err); 49 | } 50 | }); 51 | } 52 | 53 | function clearSendPromises() { 54 | sendPromises = []; 55 | } 56 | 57 | function sendMetric(metricName, metricType, metricValue, dimensions = {}) { 58 | var dp = { 59 | metric: metricName, 60 | value: metricValue, 61 | dimensions: Object.assign({}, dimensions, defaultDimensions), 62 | }; 63 | var datapoints = {}; 64 | datapoints[metricType] = [dp]; 65 | 66 | return handleSend(metricSender.send(datapoints)); 67 | } 68 | 69 | function sendCustomizedEvent(eventType, dimensions, properties, timestamp) { 70 | let event = { 71 | category: "USER_DEFINED", 72 | eventType, 73 | dimensions, 74 | properties, 75 | }; 76 | 77 | if (timestamp) { 78 | event = Object.assign(event, { timestamp }); 79 | } 80 | 81 | return handleSend(metricSender.sendEvent(event)); 82 | } 83 | 84 | function toUnixTime(dateString) { 85 | return new Date(dateString).getTime(); 86 | } 87 | 88 | function sendCWEvent(cwEvent) { 89 | let detailsMap; 90 | 91 | try { 92 | detailsMap = extractDetailsForSfx(cwEvent); 93 | } catch (err) { 94 | console.error( 95 | "Unable to convert details. They wont be included in the event.", 96 | err 97 | ); 98 | } 99 | 100 | let sfxEvent = { 101 | category: "USER_DEFINED", 102 | eventType: CLOUDWATCH_EVENT_TYPE, 103 | dimensions: { 104 | region: cwEvent.region, 105 | account: cwEvent.account, 106 | detailType: cwEvent["detail-type"], 107 | source: cwEvent.source, 108 | }, 109 | properties: Object.assign( 110 | { id: cwEvent.id, version: cwEvent.version }, 111 | detailsMap, 112 | { resources: JSON.stringify(cwEvent.resources) } 113 | ), 114 | timestamp: toUnixTime(cwEvent.time), 115 | }; 116 | 117 | return handleSend(metricSender.sendEvent(sfxEvent)); 118 | } 119 | 120 | module.exports = { 121 | setDefaultDimensions: function (dimensions, meta) { 122 | defaultDimensions = Object.assign({}, dimensions, meta); 123 | defaultDimensions.metric_source = "lambda_wrapper"; 124 | }, 125 | 126 | getExecutionMetadata: function (context) { 127 | const meta = {}; 128 | if (!context) { 129 | return meta; 130 | } 131 | 132 | const splitted = context.invokedFunctionArn.split(":"); 133 | if (splitted[2] === "lambda") { 134 | meta.aws_function_name = context.functionName; 135 | meta.aws_function_version = context.functionVersion; 136 | 137 | meta.aws_region = splitted[3]; 138 | meta.aws_account_id = splitted[4]; 139 | 140 | if (splitted[5] === "function") { 141 | meta.aws_function_qualifier = splitted[7]; 142 | const updatedArn = splitted.slice(); 143 | updatedArn[7] = context.functionVersion; 144 | meta.lambda_arn = updatedArn.join(":"); 145 | } else if (splitted[5] === "event-source-mappings") { 146 | meta.event_source_mappings = splitted[6]; 147 | meta.lambda_arn = context.invokedFunctionArn; 148 | } 149 | } 150 | 151 | if (process.env.AWS_EXECUTION_ENV) { 152 | meta.aws_execution_env = process.env.AWS_EXECUTION_ENV; 153 | } 154 | meta.function_wrapper_version = 155 | packageFile.name + "-" + packageFile.version; 156 | return meta; 157 | }, 158 | 159 | sendGauge: function addGauge(metricName, metricValue, dimensions) { 160 | return sendMetric(metricName, "gauges", metricValue, dimensions); 161 | }, 162 | 163 | sendCounter: function addCounter(metricName, metricValue, dimensions) { 164 | return sendMetric(metricName, "counters", metricValue, dimensions); 165 | }, 166 | 167 | sendCustomEvent: function sendCustomEvent( 168 | type, 169 | dimensions, 170 | properties, 171 | timestamp 172 | ) { 173 | return sendCustomizedEvent(type, dimensions, properties, timestamp); 174 | }, 175 | 176 | sendCloudWatchEvent: function sendCloudWatchEvent(cwevent) { 177 | return sendCWEvent(cwevent); 178 | }, 179 | 180 | waitForAllSends: function waitForAllSends() { 181 | return Promise.all(sendPromises).then(clearSendPromises, clearSendPromises); 182 | }, 183 | 184 | isMetricsDisabled: function (disabled) { 185 | if (disabled) { 186 | return true; 187 | } 188 | return ( 189 | (process.env.SIGNALFX_METRICS_ENABLED || "true").toLowerCase() === "false" 190 | ); 191 | }, 192 | 193 | isTracingDisabled: function (disabled) { 194 | if (disabled) { 195 | return true; 196 | } 197 | return ( 198 | (process.env.SIGNALFX_TRACING_ENABLED || "true").toLowerCase() === "false" 199 | ); 200 | }, 201 | }; 202 | -------------------------------------------------------------------------------- /signalfx-lambda.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | const sfxHelper = require("./signalfx-helper"); 4 | const sfxAsyncWrapper = require("./signalfx-async-wrapper"); 5 | const sfxWrapper = require("./signalfx-wrapper"); 6 | 7 | module.exports = { 8 | wrapper: sfxWrapper, 9 | wrapperTracing: (originalFn, dimensions) => { 10 | return sfxWrapper(originalFn, dimensions, false, true); 11 | }, 12 | wrapperMetrics: (originalFn, dimensions) => { 13 | return sfxWrapper(originalFn, dimensions, true, false); 14 | }, 15 | asyncWrapper: sfxAsyncWrapper, 16 | asyncWrapperTracing: (originalFn, dimensions) => { 17 | return sfxAsyncWrapper(originalFn, dimensions, false, true); 18 | }, 19 | asyncWrapperMetrics: (originalFn, dimensions) => { 20 | return sfxAsyncWrapper(originalFn, dimensions, true, false); 21 | }, 22 | helper: sfxHelper, 23 | }; 24 | -------------------------------------------------------------------------------- /signalfx-transform-helper.js: -------------------------------------------------------------------------------- 1 | 'use strict'; 2 | 3 | const MAX_FIELDNAME_LENGTH = 128; 4 | const DETAIL_PREFIX = "detail_"; 5 | 6 | function isPrimitive(x) { 7 | return Object(x) !== x; 8 | } 9 | 10 | function sanitize(name) { 11 | let sanitizedName = name.replace(/[^a-zA-Z0-9\-_]+/gi, '_'); 12 | if (name.length > MAX_FIELDNAME_LENGTH) { 13 | console.warn('Field name ' + name + ' longer than ' + MAX_FIELDNAME_LENGTH + ' will be truncated.'); 14 | sanitizedName = sanitizedName.substring(0, MAX_FIELDNAME_LENGTH); 15 | } 16 | return sanitizedName; 17 | } 18 | 19 | function extractDetailsForSfx(cwEvent) { 20 | let detailsMap = {}; 21 | for (let [key, value] of Object.entries(cwEvent.detail)) { 22 | let sanitizedKey = sanitize(DETAIL_PREFIX + key); 23 | if (value == null || typeof value == "boolean" || !isPrimitive(value)) { 24 | detailsMap[sanitizedKey] = JSON.stringify(value); 25 | } else { 26 | detailsMap[sanitizedKey] = value; 27 | } 28 | } 29 | return detailsMap; 30 | } 31 | 32 | 33 | module.exports = { 34 | extractDetailsForSfx: extractDetailsForSfx 35 | }; -------------------------------------------------------------------------------- /signalfx-wrapper.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | var tracing = require("./tracing"); 4 | const sfxHelper = require("./signalfx-helper"); 5 | const noopMetricSender = require("./noop-metric-helpers"); 6 | 7 | var coldStart = true; 8 | 9 | class SignalFxWrapper { 10 | constructor( 11 | originalObj, 12 | originalFn, 13 | originalEvent, 14 | originalContext, 15 | originalCallback, 16 | dimensions, 17 | disableTracing, 18 | disableMetrics 19 | ) { 20 | this.originalObj = originalObj; 21 | this.originalFn = originalFn; 22 | this.originalEvent = originalEvent; 23 | this.originalContext = originalContext; 24 | this.originalCallback = originalCallback; 25 | this.disableMetrics = sfxHelper.isMetricsDisabled(disableMetrics); 26 | this.disableTracing = sfxHelper.isTracingDisabled(disableTracing); 27 | 28 | tracing.init(this.disableTracing); 29 | this.metricSender = sfxHelper; 30 | if (this.disableMetrics) { 31 | this.metricSender = noopMetricSender; 32 | } 33 | 34 | this.execMeta = sfxHelper.getExecutionMetadata(this.originalContext); 35 | sfxHelper.setDefaultDimensions(dimensions, this.execMeta); 36 | 37 | this.metricSender.sendCounter("function.invocations", 1); 38 | if (coldStart) { 39 | this.metricSender.sendCounter("function.cold_starts", 1); 40 | coldStart = false; 41 | } 42 | 43 | return this; 44 | } 45 | 46 | invoke() { 47 | var exception, error, message, callbackProcessed; 48 | 49 | const tracer = tracing.tracer(this.disableTracing); 50 | const span = tracing.startSpan(tracer, this.originalEvent, this.execMeta); 51 | 52 | const startTime = new Date().getTime(); 53 | 54 | const processCallback = () => { 55 | if (callbackProcessed) { 56 | return; 57 | } 58 | callbackProcessed = true; 59 | this.metricSender.sendGauge( 60 | "function.duration", 61 | new Date().getTime() - startTime 62 | ); 63 | 64 | const err = exception || error; 65 | if (err) { 66 | span.addTags({ 67 | "sfx.error.kind": err.name, 68 | "sfx.error.message": err.message, 69 | "sfx.error.stack": err.stack, 70 | }); 71 | } 72 | 73 | const runCallback = () => { 74 | if (exception) { 75 | this.originalCallback(exception, "Exception was thrown"); 76 | } 77 | this.originalCallback(error, message); 78 | }; 79 | 80 | span.finish(); 81 | 82 | Promise.all([tracing.flush(), sfxHelper.waitForAllSends()]).then( 83 | runCallback, 84 | runCallback 85 | ); 86 | }; 87 | 88 | const customCallback = (err, msg) => { 89 | error = err; 90 | message = msg; 91 | processCallback(); 92 | }; 93 | 94 | tracer.scope().activate(span, () => { 95 | try { 96 | this.originalFn.call( 97 | this.originalObj, 98 | this.originalEvent, 99 | this.originalContext, 100 | customCallback 101 | ); 102 | } catch (err) { 103 | this.metricSender.sendCounter('function.errors', 1); 104 | exception = err; 105 | processCallback(); 106 | } 107 | }); 108 | } 109 | } 110 | 111 | module.exports = (originalFn, dimensions, disableTracing, disableMetrics) => { 112 | return function customHandler( 113 | originalEvent, 114 | originalContext, 115 | originalCallback 116 | ) { 117 | var originalObj = this; 118 | return new SignalFxWrapper( 119 | originalObj, 120 | originalFn, 121 | originalEvent, 122 | originalContext, 123 | originalCallback, 124 | dimensions, 125 | disableTracing, 126 | disableMetrics 127 | ).invoke(); 128 | }; 129 | }; 130 | -------------------------------------------------------------------------------- /spec/agent.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | const http = require("http"); 4 | const bodyParser = require("body-parser"); 5 | const express = require("express"); 6 | const Int64BE = require("int64-buffer").Int64BE; 7 | 8 | function flat(array) { 9 | const flat = []; 10 | array.forEach((inner) => { 11 | inner.forEach((item) => { 12 | flat.push(item); 13 | }); 14 | }); 15 | return flat; 16 | } 17 | 18 | function getAgent(port) { 19 | const agent = { 20 | spans: [], 21 | }; 22 | const app = express(); 23 | 24 | app.use(bodyParser.raw({ type: "application/json" })); 25 | app.use((req, res, next) => { 26 | if (req.body.length === 0) { 27 | return res.status(200).send(); 28 | } 29 | req.body = [JSON.parse(req.body)]; 30 | next(); 31 | }); 32 | 33 | app.post("/v1/trace", (req, res) => { 34 | agent.spans.push(req.body); 35 | agent.spans = flat(flat(agent.spans)); 36 | res.status(200).send(); 37 | }); 38 | 39 | return new Promise((resolve, reject) => { 40 | const server = http.createServer(app); 41 | agent.listener = server.listen(port, "localhost", (r) => { 42 | resolve(agent); 43 | }); 44 | }); 45 | } 46 | 47 | module.exports = getAgent; 48 | -------------------------------------------------------------------------------- /spec/config/jasmine.json: -------------------------------------------------------------------------------- 1 | { 2 | "spec_dir": "spec", 3 | "spec_files": [ 4 | "**/*[sS]pec.js" 5 | ], 6 | "helpers": [ 7 | "helpers/**/*.js" 8 | ], 9 | "stopSpecOnExpectationFailure": false, 10 | "random": true 11 | } 12 | -------------------------------------------------------------------------------- /spec/helpers/terminal-reporter.js: -------------------------------------------------------------------------------- 1 | var Reporter = require('jasmine-terminal-reporter'); 2 | var reporter = new Reporter({isVerbose: true}); 3 | 4 | jasmine.getEnv().addReporter(reporter); 5 | -------------------------------------------------------------------------------- /spec/signalfx-helper-spec.js: -------------------------------------------------------------------------------- 1 | const mock = require('mock-require'); 2 | const sinon = require('sinon'); 3 | const chai = require('chai'); 4 | const expect = chai.expect; 5 | 6 | // mock signalfx dependency 7 | const SEND_FUNCTION_STUB = sinon.stub().returns(Promise.resolve()); 8 | const SEND_EVENT_STUB = sinon.stub().returns(Promise.resolve()); 9 | 10 | class DummyIngestJson { 11 | constructor() { 12 | this.send = SEND_FUNCTION_STUB; 13 | this.sendEvent = SEND_EVENT_STUB; 14 | } 15 | } 16 | 17 | mock('signalfx', { IngestJson: DummyIngestJson, Ingest: DummyIngestJson}); 18 | 19 | // require helper after singalfx is mocked 20 | const signalfxHelper = require('../signalfx-helper'); 21 | 22 | 23 | describe('signalfx-helper', () => { 24 | 25 | const LAMBDA_ARN = 'arn:aws:lambda:us-east-2:123456789012:function:test-cw-events'; 26 | const CONTEXT_DIMENSIONS = {sampleDimension: 'test', otherDimension: 'otherTest'}; 27 | 28 | beforeEach(() => { 29 | const meta = signalfxHelper.getExecutionMetadata({invokedFunctionArn: LAMBDA_ARN}); 30 | signalfxHelper.setDefaultDimensions(meta, CONTEXT_DIMENSIONS); 31 | SEND_EVENT_STUB.resetHistory(); 32 | SEND_FUNCTION_STUB.resetHistory(); 33 | }); 34 | 35 | afterEach(() => { 36 | delete process.env.SIGNALFX_TRACING_ENABLED; 37 | delete process.env.SIGNALFX_METRICS_ENABLED; 38 | }); 39 | 40 | it('should use args and env vars to disable tracing/metrics', () => { 41 | expect(signalfxHelper.isMetricsDisabled(true)).to.equal(true); 42 | expect(signalfxHelper.isMetricsDisabled(false)).to.equal(false); 43 | 44 | expect(signalfxHelper.isTracingDisabled(true)).to.equal(true); 45 | expect(signalfxHelper.isTracingDisabled(false)).to.equal(false); 46 | 47 | process.env.SIGNALFX_METRICS_ENABLED = 'false'; 48 | expect(signalfxHelper.isMetricsDisabled(true)).to.equal(true); 49 | expect(signalfxHelper.isMetricsDisabled(false)).to.equal(true); 50 | 51 | process.env.SIGNALFX_TRACING_ENABLED = 'false'; 52 | expect(signalfxHelper.isTracingDisabled(true)).to.equal(true); 53 | expect(signalfxHelper.isTracingDisabled(false)).to.equal(true); 54 | 55 | process.env.SIGNALFX_METRICS_ENABLED = 'faksjdke'; 56 | expect(signalfxHelper.isMetricsDisabled(true)).to.equal(true); 57 | expect(signalfxHelper.isMetricsDisabled(false)).to.equal(false); 58 | 59 | process.env.SIGNALFX_TRACING_ENABLED = 'f1312kse'; 60 | expect(signalfxHelper.isTracingDisabled(true)).to.equal(true); 61 | expect(signalfxHelper.isTracingDisabled(false)).to.equal(false); 62 | }); 63 | 64 | it('should send a counter with correct name, value and dimension', () => { 65 | const METRIC_NAME = 'sampleMetricName'; 66 | const METRIC_VALUE = 10; 67 | 68 | signalfxHelper.sendCounter(METRIC_NAME, METRIC_VALUE, {specificDimension: 'addedInTest'}); 69 | expect(SEND_FUNCTION_STUB.calledOnce).to.be.true; 70 | 71 | const firstSentCounter = SEND_FUNCTION_STUB.firstCall.args[0].counters[0]; 72 | 73 | expect(firstSentCounter.metric).to.equal(METRIC_NAME); 74 | expect(firstSentCounter.value).to.equal(METRIC_VALUE); 75 | expect(firstSentCounter.dimensions.specificDimension).to.equal('addedInTest'); 76 | expect(firstSentCounter.dimensions.sampleDimension).to.equal('test'); 77 | expect(firstSentCounter.dimensions.otherDimension).to.equal('otherTest'); 78 | expect(firstSentCounter.dimensions.lambda_arn).to.equal(LAMBDA_ARN + ':'); 79 | }); 80 | 81 | it('should send a custom event with no timestamp', () => { 82 | const DIMENSIONS = {dimension: 'one', otherDimension: 'second'}; 83 | const PROPERTIES = {property: 'prop'}; 84 | signalfxHelper.sendCustomEvent('testType', DIMENSIONS, PROPERTIES); 85 | expect(SEND_EVENT_STUB.calledOnce).to.be.true; 86 | 87 | const event = SEND_EVENT_STUB.firstCall.args[0] 88 | 89 | expect(event.eventType).to.be.equal('testType'); 90 | expect(event.dimensions).to.be.equal(DIMENSIONS); 91 | expect(event.properties).to.be.equal(PROPERTIES); 92 | expect(event.category).to.be.equal('USER_DEFINED'); 93 | expect(event).to.not.have.any.keys('timestamp'); 94 | }); 95 | 96 | it('should send a custom event with timestamp if provided', () => { 97 | const DIMENSIONS = {dimension: 'one', otherDimension: 'second'}; 98 | const PROPERTIES = {property: 'prop'}; 99 | const TIMESTAMP = 123456; 100 | signalfxHelper.sendCustomEvent('testType', DIMENSIONS, PROPERTIES, TIMESTAMP); 101 | expect(SEND_EVENT_STUB.calledOnce).to.be.true; 102 | 103 | const event = SEND_EVENT_STUB.firstCall.args[0] 104 | expect(event.timestamp).to.be.equal(TIMESTAMP); 105 | }); 106 | 107 | it('should send a Cloudwatch event with Cloudwatch event type and converted timestamp', () => { 108 | const DETAILS = {'instance-id': 'i-a1s2d3f4g5h6j7', state: 'pending', obj: {key: 'val'} }; 109 | const RESOURCES = [ 'arn:aws:ec2:us-east-2:123456789012:instance/i-a1s2d3f4g5h6j7' ]; 110 | 111 | const testCwEvent = { 112 | version: '0', 113 | id: 'abcd1234-a123-b345-c456-d3f4g5h6j7', 114 | 'detail-type': 'EC2 Instance State-change Notification', 115 | source: 'aws.ec2', 116 | account: '123456789012', 117 | time: '2020-02-20T11:36:21Z', 118 | region: 'us-east-2', 119 | resources: RESOURCES, 120 | detail: DETAILS 121 | }; 122 | 123 | signalfxHelper.sendCloudWatchEvent(testCwEvent); 124 | 125 | expect(SEND_EVENT_STUB.calledOnce).to.be.true; 126 | const event = SEND_EVENT_STUB.firstCall.args[0]; 127 | expect(event.eventType).to.be.equal('CloudWatch'); 128 | expect(event.timestamp).to.be.equal(1582198581000); 129 | expect(event.properties.id).to.be.equal('abcd1234-a123-b345-c456-d3f4g5h6j7'); 130 | expect(event.dimensions.detailType).to.be.equal('EC2 Instance State-change Notification'); 131 | expect(event.dimensions.source).to.be.equal('aws.ec2'); 132 | expect(event.properties['detail_instance-id']).to.be.equal('i-a1s2d3f4g5h6j7'); 133 | expect(event.properties['detail_state']).to.be.equal('pending'); 134 | expect(event.properties['detail_obj']).to.be.equal('{"key":"val"}'); 135 | expect(event.properties['resources']).to.be.equal('["arn:aws:ec2:us-east-2:123456789012:instance/i-a1s2d3f4g5h6j7"]'); 136 | }); 137 | 138 | }); 139 | 140 | -------------------------------------------------------------------------------- /spec/signalfx-transform-helper-spec.js: -------------------------------------------------------------------------------- 1 | const signalfxHelper = require('../signalfx-transform-helper'); 2 | const chai = require('chai'); 3 | const expect = chai.expect; 4 | 5 | describe('signalfx-transform-helper', () => { 6 | 7 | it('should sanitize field names to include only a-zA-Z0-9_', () => { 8 | const obj = { 9 | id: "7bf73129-1428-4cd3-a780-95db273d1602", 10 | 'detail-type': "EC2 Instance State-change Notification", 11 | detail: {'_ some _ TrIc!ky_! _ke@y $%^1&': 'value'} 12 | }; 13 | const expected = {detail___some___TrIc_ky___ke_y_1_: 'value'}; 14 | const sanitizedAndPrefixed = signalfxHelper.extractDetailsForSfx(obj); 15 | expect(sanitizedAndPrefixed).to.deep.equal(expected); 16 | }); 17 | 18 | it('should leave non-object parameters as is', () => { 19 | const obj = { 20 | id: "7bf73129-1428-4cd3-a780-95db273d1602", 21 | 'detail-type': "EC2 Instance State-change Notification", 22 | detail: { 23 | key1: 'value', 24 | key2: 5 25 | } 26 | }; 27 | const expected = { 28 | detail_key1: 'value', 29 | detail_key2: 5 30 | }; 31 | const sanitizedAndPrefixed = signalfxHelper.extractDetailsForSfx(obj); 32 | expect(sanitizedAndPrefixed).to.deep.equal(expected); 33 | }); 34 | 35 | it('should stringify arrays, objects, nulls and booleans', () => { 36 | const obj = { 37 | id: "7bf73129-1428-4cd3-a780-95db273d1602", 38 | 'detail-type': "EC2 Instance State-change Notification", 39 | detail: { 40 | key1: 'value', 41 | key2: 5, 42 | "key2.1": 5.1, 43 | key3: {' inner1 ': 42, inner2: null}, 44 | key4: [2, "one"], 45 | key5: [], 46 | ' key6 ': ' value space-surrounded ', 47 | key7: null, 48 | key8: true, 49 | key9: new Boolean(false), 50 | } 51 | }; 52 | const expected = { 53 | detail_key1: 'value', 54 | detail_key2: 5, 55 | detail_key2_1: 5.1, 56 | detail_key3: '{" inner1 ":42,"inner2":null}', 57 | detail_key4: '[2,"one"]', 58 | detail_key5: '[]', 59 | detail__key6_: ' value space-surrounded ', 60 | detail_key7: 'null', 61 | detail_key8: 'true', 62 | detail_key9: 'false', 63 | }; 64 | const sanitizedAndPrefixed = signalfxHelper.extractDetailsForSfx(obj); 65 | expect(sanitizedAndPrefixed).to.deep.equal(expected); 66 | }); 67 | 68 | }); -------------------------------------------------------------------------------- /spec/tracing-spec.js: -------------------------------------------------------------------------------- 1 | const mock = require("mock-require"); 2 | const sinon = require("sinon"); 3 | const chai = require("chai"); 4 | const getPort = require("get-port"); 5 | const expect = chai.expect; 6 | const generateId = require('signalfx-tracing/src/platform/node/id'); 7 | 8 | const getAgent = require("./agent"); 9 | const e = require("express"); 10 | 11 | const requestStub = sinon.stub().returns(Promise.resolve()); 12 | 13 | // mock('signalfx', { IngestJson: DummyIngestJson}); 14 | // mock('signalfx-tracing/src/zipkin/writer/ZipkinV2Writer', {_request: requestStub}) 15 | 16 | // require helper after singalfx is mocked 17 | 18 | describe("signalfx-helper", () => { 19 | const NoopTracer = require("signalfx-tracing/src/noop/tracer"); 20 | const TracerProxy = require("signalfx-tracing/src/proxy"); 21 | 22 | let agent; 23 | let tracing; 24 | let sfx; 25 | let port; 26 | const ctx = { 27 | invokedFunctionArn: 28 | "arn:aws:lambda:us-east-2:123456789012:function:test-cw-events", 29 | functionName: "test-func", 30 | functionVersion: "2.0", 31 | }; 32 | 33 | function testSpanWithError(span, err) { 34 | expect(span.name).to.equal("lambda_node_test-func"); 35 | expect(span.localEndpoint.serviceName).to.equal("signalfx-lambda"); 36 | if (err) { 37 | expect(span.tags.error).to.equal("true"); 38 | expect(span.tags["sfx.error.kind"]).to.equal("Error"); 39 | expect(span.tags["sfx.error.message"]).to.equal(err.message); 40 | expect(span.tags.lambda_arn).to.equal(ctx.invokedFunctionArn + ":2.0"); 41 | } else { 42 | expect(span.tags.error).to.equal(undefined); 43 | } 44 | } 45 | 46 | beforeEach((done) => { 47 | if (!agent) { 48 | getPort().then((p) => { 49 | port = p; 50 | process.env.SIGNALFX_ENDPOINT_URL = `http://localhost:${port}/v1/trace`; 51 | sfx = mock.reRequire("../signalfx-lambda"); 52 | tracing = mock.reRequire("../tracing"); 53 | getAgent(port).then((a) => { 54 | agent = a; 55 | done(); 56 | }); 57 | }); 58 | } else { 59 | done(); 60 | } 61 | }); 62 | 63 | afterEach(() => { 64 | agent.spans = []; 65 | }); 66 | 67 | it("should return correct tracer", () => { 68 | let tracer = tracing.tracer(); 69 | expect(tracer).is.instanceOf(TracerProxy); 70 | 71 | tracer = tracing.tracer(true); 72 | expect(tracer).is.instanceOf(NoopTracer); 73 | }); 74 | 75 | it("should report spans with callback handler", (done) => { 76 | function callback(err, result) { 77 | expect(err).is.instanceOf(Error); 78 | expect(err.message).to.equal("error msg"); 79 | expect(result).to.equal("result val"); 80 | expect(agent.spans).to.length(1); 81 | testSpanWithError(agent.spans[0], err); 82 | done(); 83 | } 84 | 85 | sfx.wrapperTracing(function (event, ctx, callback) { 86 | callback(new Error("error msg"), "result val"); 87 | })({}, ctx, callback); 88 | }); 89 | 90 | it("should report spans with async handler", async () => { 91 | try { 92 | await sfx.asyncWrapperTracing(async function (event, ctx) { 93 | throw new Error("error msg async"); 94 | })({}, ctx); 95 | } catch (err) { 96 | expect(err).is.instanceOf(Error); 97 | expect(err.message).to.equal("error msg async"); 98 | expect(agent.spans).to.length(1); 99 | const span = agent.spans[0]; 100 | testSpanWithError(span, err); 101 | } 102 | }); 103 | 104 | it("async wrapper should return correct response", async () => { 105 | const result = await sfx.asyncWrapperTracing(async function (event, ctx) { 106 | return Promise.resolve("my response"); 107 | })({}, ctx); 108 | expect(result).is.equal("my response"); 109 | expect(agent.spans).to.length(1); 110 | const span = agent.spans[0]; 111 | testSpanWithError(span, null); 112 | }); 113 | 114 | it("should inject properties of the active sync span", (done) => { 115 | const eventWithB3Headers = { 116 | headers: { 117 | 'X-B3-TraceId': generateId().toBuffer().toString('hex'), 118 | 'X-B3-SpanId': generateId().toBuffer().toString('hex'), 119 | 'X-B3-Sampled': '1', 120 | }, 121 | }; 122 | 123 | const expectWhenDone = (err, result) => { 124 | expect(err).to.null; 125 | expect(result['x-b3-traceid']).to.equal(eventWithB3Headers.headers['X-B3-TraceId']); 126 | expect(result['x-b3-parentspanid']).to.equal(eventWithB3Headers.headers['X-B3-SpanId']); 127 | expect(result['x-b3-sampled']).to.equal(eventWithB3Headers.headers['X-B3-Sampled']); 128 | done(); 129 | } 130 | 131 | sfx.wrapper(function (event, ctx, callback) { 132 | const carrier = {}; 133 | tracing.inject(carrier); 134 | callback(null, carrier); 135 | })(eventWithB3Headers, ctx, expectWhenDone); 136 | }); 137 | }); 138 | -------------------------------------------------------------------------------- /test.js: -------------------------------------------------------------------------------- 1 | 'use strict'; 2 | 3 | const signalFxLambda = require('./signalfx-lambda'); 4 | 5 | exports.handler = signalFxLambda.wrapper((event, context, callback) => { 6 | console.log(event.my_test_value); 7 | const performance = Math.random(); 8 | signalFxLambda.helper.sendGauge('application.performance', performance, {'abc':'def'}); 9 | console.log('Custom app metric is ' + performance); 10 | // callback('this is the failure'); 11 | setTimeout(function() { 12 | callback(null, 'this is the result returned'); 13 | }, 1000); 14 | }); 15 | -------------------------------------------------------------------------------- /test2.js: -------------------------------------------------------------------------------- 1 | 'use strict'; 2 | 3 | const signalFxLambda = require('./signalfx-lambda'); 4 | 5 | console.log('Loading function'); 6 | 7 | function getState(event) { 8 | let state = { 9 | sleepDuration: parseInt(event.sleepDuration || '0'), 10 | } 11 | return state; 12 | } 13 | 14 | exports.handler = signalFxLambda.wrapper((event, context, callback) => { 15 | signalFxLambda.helper.sendGauge('application.performance', state.sleepDuration); 16 | console.log('Custom app metric is ' + state.sleepDuration); 17 | }); 18 | -------------------------------------------------------------------------------- /test3.js: -------------------------------------------------------------------------------- 1 | 'use strict'; 2 | 3 | const signalFxLambda = require('./signalfx-lambda'); 4 | 5 | var AWS = require('aws-sdk'); 6 | var lambda = new AWS.Lambda(); 7 | 8 | console.log('Loading function'); 9 | 10 | function sleepFor(sleepFor) { 11 | const now = new Date().getTime(); 12 | const endTime = now + sleepFor; 13 | while(endTime > (new Date().getTime())) { 14 | 15 | } 16 | } 17 | 18 | function getState(event) { 19 | let state = { 20 | sleepDuration: parseInt(event.sleepDuration || "0"), 21 | } 22 | return state; 23 | } 24 | 25 | function reinvoke(sleepDuration) { 26 | let reinvokeParameters = { 27 | FunctionName: 'DemoAppMetrics', 28 | InvocationType: 'RequestResponse', 29 | Payload: JSON.stringify({sleepDuration: sleepDuration}) 30 | }; 31 | var rq = lambda.invoke(reinvokeParameters); 32 | rq.send(); 33 | } 34 | 35 | function getSleepDuration() { 36 | return Math.ceil(Math.random() * 500) + 50; 37 | } 38 | 39 | exports.handler = signalFxLambda.wrapper((event, context, callback) => { 40 | let state = getState(event); 41 | 42 | let startTime = new Date().getTime(); 43 | let endTime = startTime + 60000; 44 | let totalSlept = 0; 45 | let totalInvocations = 0; 46 | 47 | function getPromise() { 48 | const sleepDuration = getSleepDuration(); 49 | return signalFxLambda.helper.sendGauge('application.performance', sleepDuration).then(() => { 50 | reinvoke(sleepDuration) 51 | sleepFor(sleepDuration); 52 | if (new Date().getTime() <= endTime) { 53 | currentPromise = currentPromise.then(getPromise()); 54 | } 55 | }); 56 | } 57 | 58 | var currentPromise = getPromise(); 59 | }); 60 | -------------------------------------------------------------------------------- /tracing.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | const url = require('url'); 4 | 5 | const tracing = require("signalfx-tracing"); 6 | const FORMATS = require("signalfx-tracing/ext/formats.js"); 7 | const opentracing = require("opentracing"); 8 | const NoopTracer = require("signalfx-tracing/src/noop/tracer"); 9 | 10 | const _defaultEndpointPath = '/v1/trace'; 11 | 12 | // must init tracer here before other libraries are imported in order to apply 13 | // auto-instrumentation patches. 14 | let _tracer; 15 | 16 | if ((process.env.SIGNALFX_TRACING_ENABLED || "true").toLowerCase() == "false") { 17 | _tracer = new NoopTracer(); 18 | } else { 19 | const options = { 20 | service: 21 | process.env.SIGNALFX_SERVICE_NAME || process.env.AWS_LAMBDA_FUNCTION_NAME, 22 | }; 23 | if (process.env.SIGNALFX_ENDPOINT_URL) { 24 | const parsed = url.parse(process.env.SIGNALFX_ENDPOINT_URL); 25 | if (parsed.pathname === "/") { 26 | parsed.pathname = _defaultEndpointPath; 27 | } 28 | options.url = url.format(parsed); 29 | } 30 | _tracer = tracing.init(options); 31 | } 32 | 33 | opentracing.initGlobalTracer(_tracer); 34 | 35 | module.exports = { 36 | init: function(disabled) { 37 | if (!disabled && !process.env.SIGNALFX_ENDPOINT_URL) { 38 | console.warn('Tracing is not disabled but SIGNALFX_ENDPOINT_URL is not specified either'); 39 | } 40 | }, 41 | 42 | tracer: function (tracingDisabled) { 43 | return tracingDisabled ? new NoopTracer() : _tracer; 44 | }, 45 | 46 | flush: function () { 47 | return _tracer.flush(); 48 | }, 49 | 50 | startSpan: function (tracer, event, meta) { 51 | const opName = "lambda_node_" + meta.aws_function_name; 52 | let childOf = tracer.extract( 53 | opentracing.FORMAT_HTTP_HEADERS, 54 | event.headers || {} 55 | ); 56 | 57 | var span; 58 | if (childOf) { 59 | span = tracer.startSpan(opName, { childOf }); 60 | } else { 61 | span = tracer.startSpan(opName); 62 | } 63 | 64 | Object.entries(meta).forEach((pair) => { 65 | if (pair[1]) { 66 | span.setTag(pair[0], pair[1]); 67 | } 68 | }); 69 | span.setTag("span.kind", "server"); 70 | span.setTag("component", "node-lambda-wrapper"); 71 | return span; 72 | }, 73 | 74 | inject: function inject(carrier) { 75 | const activeSpan = _tracer.scope().active(); 76 | if (!activeSpan) { 77 | console.warn('There are no active spans to inject.'); 78 | return; 79 | } 80 | 81 | _tracer.inject(activeSpan, FORMATS.HTTP_HEADERS, carrier); 82 | }, 83 | }; 84 | --------------------------------------------------------------------------------