From fc679419e1c1f34e9244a75f0d5472942892f3c6 Mon Sep 17 00:00:00 2001 From: Sam Roberts Date: Thu, 30 Apr 2020 08:24:16 -0700 Subject: [PATCH] nodejs-express: new kafka template (#698) Fixes: https://github.com/appsody/stacks/issues/692 Related: https://github.com/appsody/stacks/issues/695 --- .../nodejs-express/image/project/Dockerfile | 6 + .../image/project/package-lock.json | 95 +- .../nodejs-express/image/project/package.json | 1 + .../nodejs-express/image/project/server.js | 1 + incubator/nodejs-express/stack.yaml | 2 +- .../nodejs-express/templates/kafka/.gitignore | 88 ++ .../templates/kafka/.vscode/launch.json | 14 + .../templates/kafka/.vscode/tasks.json | 47 + .../nodejs-express/templates/kafka/README.md | 59 ++ .../nodejs-express/templates/kafka/app.js | 148 +++ .../templates/kafka/docker-compose.yaml | 30 + .../templates/kafka/package-lock.json | 986 ++++++++++++++++++ .../templates/kafka/package.json | 19 + .../templates/kafka/test/test.js | 7 + 14 files changed, 1469 insertions(+), 34 deletions(-) create mode 100644 incubator/nodejs-express/templates/kafka/.gitignore create mode 100644 incubator/nodejs-express/templates/kafka/.vscode/launch.json create mode 100644 incubator/nodejs-express/templates/kafka/.vscode/tasks.json create mode 100644 incubator/nodejs-express/templates/kafka/README.md create mode 100644 incubator/nodejs-express/templates/kafka/app.js create mode 100644 incubator/nodejs-express/templates/kafka/docker-compose.yaml create mode 100644 incubator/nodejs-express/templates/kafka/package-lock.json create mode 100644 incubator/nodejs-express/templates/kafka/package.json create mode 100644 incubator/nodejs-express/templates/kafka/test/test.js diff --git a/incubator/nodejs-express/image/project/Dockerfile b/incubator/nodejs-express/image/project/Dockerfile index 81634e65f..254faf621 100644 --- a/incubator/nodejs-express/image/project/Dockerfile +++ b/incubator/nodejs-express/image/project/Dockerfile @@ -1,6 +1,9 @@ # Install the app dependencies in a full Node docker image FROM node:12 +# librdkafka builds against libssl-dev +RUN apt-get update && apt-get install -y libssl-dev && apt-get clean + # Copying individual files/folders as buildah 1.9.0 does not honour .dockerignore COPY package*.json /project/ COPY *.js /project/ @@ -22,6 +25,9 @@ RUN cd / && tar czf project.tgz project # Copy the dependencies into a slim Node docker image FROM node:12-slim +# librdkafka links against libssl +RUN apt-get update && apt-get install -y libssl1.1 && apt-get clean + # Copy project with dependencies COPY --chown=node:node --from=0 /project.tgz / RUN tar xf project.tgz && chown -R node:node /project && rm project.tgz diff --git a/incubator/nodejs-express/image/project/package-lock.json b/incubator/nodejs-express/image/project/package-lock.json index dccee3647..c42410382 100644 --- a/incubator/nodejs-express/image/project/package-lock.json +++ b/incubator/nodejs-express/image/project/package-lock.json @@ -45,9 +45,9 @@ "dev": true }, "ajv": { - "version": "6.12.0", - "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.0.tgz", - "integrity": "sha512-D6gFiFA0RRLyUbvijN74DWAjXSFxWKaWP7mldxkVhyhAV3+SWA9HEJPHQ2c9soIeTFJqcSdFDGFgdqs1iUU2Hw==", + "version": "6.12.2", + "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.2.tgz", + "integrity": "sha512-k+V+hzjm5q/Mr8ef/1Y9goCmlsK4I6Sm74teeyGvFk1XrOsbsKLjEdrvny42CZ+a8sXbk8KWpY/bDwS+FLL2UQ==", "dev": true, "requires": { "fast-deep-equal": "^3.1.1", @@ -273,6 +273,14 @@ "integrity": "sha512-Phlt0plgpIIBOGTT/ehfFnbNlfsDEiqmzE2KRXoX1bLIlir4X/MR+zSyBEkL05ffWgnRSf/DXv+WrUAVr93/ow==", "dev": true }, + "bindings": { + "version": "1.5.0", + "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.5.0.tgz", + "integrity": "sha512-p2q/t/mhvuOj/UeLlV6566GD/guowlr0hHxClI0W9m7MWYkL1F0hLo+0Aexs9HSPCtR1SXQ0TD3MMKrXZajbiQ==", + "requires": { + "file-uri-to-path": "1.0.0" + } + }, "bintrees": { "version": "1.0.1", "resolved": "https://registry.npmjs.org/bintrees/-/bintrees-1.0.1.tgz", @@ -677,9 +685,9 @@ } }, "engine.io": { - "version": "3.4.0", - "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.4.0.tgz", - "integrity": "sha512-XCyYVWzcHnK5cMz7G4VTu2W7zJS7SM1QkcelghyIk/FmobWBtXE7fwhBusEKvCSqc3bMh8fNFMlUkCKTFRxH2w==", + "version": "3.4.1", + "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.4.1.tgz", + "integrity": "sha512-8MfIfF1/IIfxuc2gv5K+XlFZczw/BpTvqBdl0E2fBLkYQp4miv4LuDTVtYt4yMyaIFLEr4vtaSgV4mjvll8Crw==", "dev": true, "requires": { "accepts": "~1.3.4", @@ -714,9 +722,9 @@ } }, "engine.io-client": { - "version": "3.4.0", - "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-3.4.0.tgz", - "integrity": "sha512-a4J5QO2k99CM2a0b12IznnyQndoEvtA4UAldhGzKqnHf42I3Qs2W5SPnDvatZRcMaNZs4IevVicBPayxYt6FwA==", + "version": "3.4.1", + "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-3.4.1.tgz", + "integrity": "sha512-RJNmA+A9Js+8Aoq815xpGAsgWH1VoSYM//2VgIiu9lNOaHFfLpTjH4tOzktBpjIs5lvOfiNY1dwf+NuU6D38Mw==", "dev": true, "requires": { "component-emitter": "1.2.1", @@ -916,6 +924,11 @@ "punycode": "^1.3.2" } }, + "file-uri-to-path": { + "version": "1.0.0", + "resolved": "https://registry.npmjs.org/file-uri-to-path/-/file-uri-to-path-1.0.0.tgz", + "integrity": "sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw==" + }, "fill-range": { "version": "7.0.1", "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.0.1.tgz", @@ -1022,9 +1035,9 @@ "dev": true }, "fsevents": { - "version": "2.1.2", - "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.1.2.tgz", - "integrity": "sha512-R4wDiBwZ0KzpgOWetKDug1FZcYhqYnUYKtfZYt4mD5SBz76q0KR4Q9o7GIPamsVPGmW3EYPPJ0dOOjvx32ldZA==", + "version": "2.1.3", + "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.1.3.tgz", + "integrity": "sha512-Auw9a4AxqWpa9GUfj370BMPzzyncfBABW8Mab7BGWBYDj4Isgq+cDKtx0i6u9jcX9pQDnswsaaOTgTmA5pEjuQ==", "dev": true, "optional": true }, @@ -1557,16 +1570,16 @@ "integrity": "sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg==" }, "mime-db": { - "version": "1.43.0", - "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.43.0.tgz", - "integrity": "sha512-+5dsGEEovYbT8UY9yD7eE4XTc4UwJ1jBYlgaQQF38ENsKR3wj/8q8RFZrF9WIZpB2V1ArTVFUva8sAul1NzRzQ==" + "version": "1.44.0", + "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.44.0.tgz", + "integrity": "sha512-/NOTfLrsPBVeH7YtFPgsVWveuL+4SjjYxaQ1xtM1KMFj7HdxlBlxeyNLzhyJVx7r4rZGJAZ/6lkKCitSc/Nmpg==" }, "mime-types": { - "version": "2.1.26", - "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.26.tgz", - "integrity": "sha512-01paPWYgLrkqAyrlDorC1uDwl2p3qZT7yl806vW7DvDoxwXi46jsjFbg+WdwotBIk6/MbEhO/dh5aZ5sNj/dWQ==", + "version": "2.1.27", + "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.27.tgz", + "integrity": "sha512-JIhqnCasI9yD+SsmkquHBxTSEuZdQX5BuQnS2Vc7puQQQ+8yiP5AY5uWhpdv4YL4VM5c6iliiYWPgJ/nJQLp7w==", "requires": { - "mime-db": "1.43.0" + "mime-db": "1.44.0" } }, "minimatch": { @@ -1690,10 +1703,9 @@ "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=" }, "nan": { - "version": "2.14.0", - "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.0.tgz", - "integrity": "sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg==", - "dev": true + "version": "2.14.1", + "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.1.tgz", + "integrity": "sha512-isWHgVjnFjh2x2yuJ/tj3JbwoHu3UC2dX5G/88Cm24yB6YopVgxvBObDY7n5xW6ExmFhJpSEQqFPvq9zaXc8Jw==" }, "negotiator": { "version": "0.6.2", @@ -1745,6 +1757,15 @@ "which": "^1.3.1" } }, + "node-rdkafka": { + "version": "2.8.1", + "resolved": "https://registry.npmjs.org/node-rdkafka/-/node-rdkafka-2.8.1.tgz", + "integrity": "sha512-d0hW1IICFbXJO95crM9PdyYP0AG9s4VQLuV1Vyc1P+Qk2SogWQRC1OoYb5yfDEpm8Dt5x3BWFG6ZTqY2xsRUKg==", + "requires": { + "bindings": "^1.3.1", + "nan": "^2.14.0" + } + }, "node-report": { "version": "2.2.10", "resolved": "https://registry.npmjs.org/node-report/-/node-report-2.2.10.tgz", @@ -2096,9 +2117,9 @@ } }, "request": { - "version": "2.88.0", - "resolved": "https://registry.npmjs.org/request/-/request-2.88.0.tgz", - "integrity": "sha512-NAqBSrijGLZdM0WZNsInLJpkJokL72XYjUpnB0iwsRgxh7dB6COrHnTBNwN0E+lHDAJzu7kLAkDeY08z2/A0hg==", + "version": "2.88.2", + "resolved": "https://registry.npmjs.org/request/-/request-2.88.2.tgz", + "integrity": "sha512-MsvtOrfG9ZcrOwAW+Qi+F6HbD0CWXEh9ou77uOb7FM2WPhwT7smM833PzanhJLsgXjN89Ir6V2PczXNnMpwKhw==", "dev": true, "requires": { "aws-sign2": "~0.7.0", @@ -2108,7 +2129,7 @@ "extend": "~3.0.2", "forever-agent": "~0.6.1", "form-data": "~2.3.2", - "har-validator": "~5.1.0", + "har-validator": "~5.1.3", "http-signature": "~1.2.0", "is-typedarray": "~1.0.0", "isstream": "~0.1.2", @@ -2118,7 +2139,7 @@ "performance-now": "^2.1.0", "qs": "~6.5.2", "safe-buffer": "^5.1.2", - "tough-cookie": "~2.4.3", + "tough-cookie": "~2.5.0", "tunnel-agent": "^0.6.0", "uuid": "^3.3.2" }, @@ -2588,13 +2609,21 @@ "integrity": "sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw==" }, "tough-cookie": { - "version": "2.4.3", - "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.4.3.tgz", - "integrity": "sha512-Q5srk/4vDM54WJsJio3XNn6K2sCG+CQ8G5Wz6bZhRZoAe/+TxjWB/GlFAnYEbkYVlON9FMk/fE3h2RLpPXo4lQ==", + "version": "2.5.0", + "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.5.0.tgz", + "integrity": "sha512-nlLsUzgm1kfLXSXfRZMc1KLAugd4hqJHDTvc2hDIwS3mZAfMEuMbc03SujMF+GEcpaX/qboeycw6iO8JwVv2+g==", "dev": true, "requires": { - "psl": "^1.1.24", - "punycode": "^1.4.1" + "psl": "^1.1.28", + "punycode": "^2.1.1" + }, + "dependencies": { + "punycode": { + "version": "2.1.1", + "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz", + "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==", + "dev": true + } } }, "tunnel-agent": { diff --git a/incubator/nodejs-express/image/project/package.json b/incubator/nodejs-express/image/project/package.json index 38ddd2851..1492645ab 100644 --- a/incubator/nodejs-express/image/project/package.json +++ b/incubator/nodejs-express/image/project/package.json @@ -17,6 +17,7 @@ "@cloudnative/health-connect": "^2.0.0", "express": "^4.17.1", "express-pino-logger": "^4.0.0", + "node-rdkafka": "^2.7.4", "pino": "^5.14.0", "prom-client": "^12.0.0" }, diff --git a/incubator/nodejs-express/image/project/server.js b/incubator/nodejs-express/image/project/server.js index 8d6f9a4c5..82671d3cf 100644 --- a/incubator/nodejs-express/image/project/server.js +++ b/incubator/nodejs-express/image/project/server.js @@ -73,6 +73,7 @@ const userApp = require(basePath + getEntryPoint()); app.use('/', userApp({ server: server, app: app, + log: pino, })); app.get('*', (req, res) => { diff --git a/incubator/nodejs-express/stack.yaml b/incubator/nodejs-express/stack.yaml index 35ad811ab..17e5333bc 100644 --- a/incubator/nodejs-express/stack.yaml +++ b/incubator/nodejs-express/stack.yaml @@ -1,5 +1,5 @@ name: Node.js Express -version: 0.4.7 +version: 0.4.8 description: Express web framework for Node.js license: Apache-2.0 language: nodejs diff --git a/incubator/nodejs-express/templates/kafka/.gitignore b/incubator/nodejs-express/templates/kafka/.gitignore new file mode 100644 index 000000000..ed0d3c87d --- /dev/null +++ b/incubator/nodejs-express/templates/kafka/.gitignore @@ -0,0 +1,88 @@ +# Logs +logs +*.log +npm-debug.log* +yarn-debug.log* +yarn-error.log* +lerna-debug.log* + +# Diagnostic reports (https://nodejs.org/api/report.html) +report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json + +# Runtime data +pids +*.pid +*.seed +*.pid.lock + +# Directory for instrumented libs generated by jscoverage/JSCover +lib-cov + +# Coverage directory used by tools like istanbul +coverage +*.lcov + +# nyc test coverage +.nyc_output + +# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files) +.grunt + +# Bower dependency directory (https://bower.io/) +bower_components + +# node-waf configuration +.lock-wscript + +# Compiled binary addons (https://nodejs.org/api/addons.html) +build/Release + +# Dependency directories +node_modules/ +jspm_packages/ + +# TypeScript v1 declaration files +typings/ + +# TypeScript cache +*.tsbuildinfo + +# Optional npm cache directory +.npm + +# Optional eslint cache +.eslintcache + +# Optional REPL history +.node_repl_history + +# Output of 'npm pack' +*.tgz + +# Yarn Integrity file +.yarn-integrity + +# dotenv environment variables file +.env +.env.test + +# parcel-bundler cache (https://parceljs.org/) +.cache + +# next.js build output +.next + +# nuxt.js build output +.nuxt + +# vuepress build output +.vuepress/dist + +# Serverless directories +.serverless/ + +# FuseBox cache +.fusebox/ + +# DynamoDB Local files +.dynamodb/ diff --git a/incubator/nodejs-express/templates/kafka/.vscode/launch.json b/incubator/nodejs-express/templates/kafka/.vscode/launch.json new file mode 100644 index 000000000..4185e6b14 --- /dev/null +++ b/incubator/nodejs-express/templates/kafka/.vscode/launch.json @@ -0,0 +1,14 @@ +{ + "version": "0.2.0", + "configurations": [ + { + "name": "Appsody: Attach node debugger", + "type": "node", + "request": "attach", + "port": 9229, + "remoteRoot": "/project/user-app", + "localRoot": "${workspaceFolder}", + "protocol": "inspector" + } + ] +} \ No newline at end of file diff --git a/incubator/nodejs-express/templates/kafka/.vscode/tasks.json b/incubator/nodejs-express/templates/kafka/.vscode/tasks.json new file mode 100644 index 000000000..1f2c9ecd9 --- /dev/null +++ b/incubator/nodejs-express/templates/kafka/.vscode/tasks.json @@ -0,0 +1,47 @@ +{ + "version": "2.0.0", + "tasks": [ + { + "label": "Appsody: run", + "type": "shell", + "command": "appsody run", + "group": "build", + "problemMatcher": [] + }, + { + "label": "Appsody: debug", + "type": "shell", + "command": "appsody debug", + "group": "build", + "problemMatcher": [] + }, + { + "label": "Appsody: test", + "type": "shell", + "command": "appsody test", + "group": "test", + "problemMatcher": [] + }, + { + "label": "Appsody: build", + "type": "shell", + "command": "appsody build", + "group": "build", + "problemMatcher": [] + }, + { + "label": "Appsody: deploy", + "type": "shell", + "command": "appsody deploy", + "group": "build", + "problemMatcher": [] + }, + { + "label": "Appsody: stop", + "type": "shell", + "command": "appsody stop", + "group": "build", + "problemMatcher": [] + } + ] +} \ No newline at end of file diff --git a/incubator/nodejs-express/templates/kafka/README.md b/incubator/nodejs-express/templates/kafka/README.md new file mode 100644 index 000000000..cc2c081af --- /dev/null +++ b/incubator/nodejs-express/templates/kafka/README.md @@ -0,0 +1,59 @@ +# Kafka Template + +The `kafka` template provides you with an Express application and skeleton code +to publish and subscribe to Kafka using +[node-rdkafka](https://www.npmjs.com/package/node-rdkafka). + + +## Getting Started + +1. Create a new folder in your local directory and initialize it using the Appsody CLI, e.g.: + + ```bash + mkdir my-project + cd my-project + appsody init nodejs-express kafka + ``` + + This will initialize a Node.js Express project using the `kafka` template. + +1. After your project has been initialized you can then run your application using the following command: + + ```bash + appsody run --docker-options "--env KAFKA_BOOTSTRAP_SERVERS=${KAFKA_BOOTSTRAP_SERVERS}" + ``` + +E.g: +``` +appsody run --network DOCKER_NETWORK_NAME --docker-options "--env KAFKA_BOOTSTRAP_SERVERS=kafka:9092" +``` +`DOCKER_NETWORK_NAME` is the name of the docker network in which the kafka container is running. + +This template expects `KAFKA_BOOTSTRAP_SERVERS` environment variable to be set +to addresses of the bootstrap servers of kafka. + +1. To deploy the application to Kubernetes run the following command: + ```bash + appsody deploy + ``` + Make sure to add the `KAFKA_BOOTSTRAP_SERVERS` environment variable in the `app-deploy.yaml` before running the above command + + ```yaml + env: + - name: KAFKA_BOOTSTRAP_SERVERS + value: ${KAFKA_BOOTSTRAP_SERVERS} + ``` + + If you are trying to connect to a Kafka instance managed by Strimzi Kafka operator, the value of `KAFKA_BOOTSTRAP_SERVERS` should be a fully qualified service hostname. + + E.g: my-cluster-kafka-bootstrap.strimzi.svc.cluster.local:9092 + + * `my-cluster` is the Kafka resource name. + * `kafka-bootstrap` is the Broker load balancer name. + * `strimzi` is the namespace in which Kafka instance is deployed. + * `9092` is the PLAINTEXT port. + + +## License + +This stack is licensed under the [Apache 2.0](./image/LICENSE) license diff --git a/incubator/nodejs-express/templates/kafka/app.js b/incubator/nodejs-express/templates/kafka/app.js new file mode 100644 index 000000000..e07e7dc21 --- /dev/null +++ b/incubator/nodejs-express/templates/kafka/app.js @@ -0,0 +1,148 @@ +const express = require('express'); + +module.exports = (options) => { + // Kafka is a required node-rdkafka: + // - api docs: https://blizzard.github.io/node-rdkafka/current/ + // - quick start: https://github.com/Blizzard/node-rdkafka#usage + const Kafka = require('node-rdkafka'); + + // options.log is a pino logger: + // - https://github.com/pinojs/pino/blob/master/docs/api.md#logger + const log = options.log; + + const app = express(); + + app.get('/', (req, res) => { + res.send('Hello from Appsody!'); + }); + + // KAFKA_BOOTSTRAP_SERVERS can be injected by the Service Binding Operator + // - https://github.com/redhat-developer/service-binding-operator + const brokers = process.env.KAFKA_BOOTSTRAP_SERVERS || 'localhost:9092' + + log.info('Kafka features: %s', Kafka.features); + log.info('Kafka brokers: %s', brokers); + + // Based on: + // - https://github.com/ibm-messaging/event-streams-samples/blob/master/kafka-nodejs-console-sample/app.js#L145 + const config = { + // debug: 'all', // Setting will cause 'event.log' events. + 'metadata.broker.list': brokers, + // 'log.connection.close' : false, + } + + Produce(Kafka, config, log, app); + Consume(Kafka, brokers, log); + + return app; +}; + +// Based on: +// - https://github.com/Blizzard/node-rdkafka/blob/master/examples/producer.md +// - https://github.com/ibm-messaging/event-streams-samples/blob/master/kafka-nodejs-console-sample/producerLoop.js +function Produce(Kafka, config, log, app) { + config.dr_msg_cb = true; // Enable delivery reports with message payload + var producer = new Kafka.Producer(config); + var topicName = 'my-topic'; + + producer.setPollInterval(100); + + // only if debug option set in config + producer.on('event.log', function(msg) { + log.debug('debug from producer:', msg); + }); + + // logging all errors + producer.on('event.error', function(err) { + log.error('error from producer: %s', err); + }); + + // wait for the ready event before producing + producer.on('ready', function(arg) { + log.info(arg, 'producer ready'); + }); + + // log delivery reports + producer.on('delivery-report', function(err, dr) { + if (err) { + log.error('Delivery failed: %j', err); + // consider retrying + } else { + log.info('Delivery success: %j', dr); + } + }); + + app.use(express.json()); + app.post("/produce", function(req, res) { + log.info({value: req.body}, "produce from POST"); + + // if partition is set to -1, librdkafka will use the default partitioner + const partition = -1; + const value = Buffer.from(JSON.stringify(req.body)); + try { + producer.produce(topicName, partition, value); + res.send("ok"); + } catch(err) { + log.error('Production failed: %j', err); + } + }); + + // starting the producer + producer.connect(); +} + +// Based on: +// - https://github.com/Blizzard/node-rdkafka/blob/master/examples/consumer-flow.md +// - https://github.com/ibm-messaging/event-streams-samples/blob/master/kafka-nodejs-console-sample/consumerLoop.js +function Consume(Kafka, brokers, log) { + var consumer = new Kafka.KafkaConsumer({ + 'metadata.broker.list': brokers, + 'group.id': 'my-group-id', + 'enable.auto.commit': false + }); + + var topicName = 'my-topic'; + + // logging all errors + consumer.on('event.error', function(err) { + log.error('error from consumer: %s', err); + }); + + // counter to commit offsets every numMessages are received + var counter = 0; + var numMessages = 5; + + consumer.on('ready', function(arg) { + log.info(arg, 'consumer ready'); + + consumer.subscribe([topicName]); + // start consuming messages + consumer.consume(); + }); + + consumer.on('data', function(m) { + counter++; + + // committing offsets every numMessages + if (counter % numMessages === 0) { + log.info('calling commit'); + consumer.commit(m); + } + + // convert value to JSON (if it is) before logging + try { + m.value = JSON.parse(m.value.toString()); + } catch { + } + + // convert key to string before logging + if (m.key) + m.key = m.key.toString() ; + + // Output the actual message contents + log.info(m, 'data received'); + }); + + // starting the consumer + consumer.connect(); +} diff --git a/incubator/nodejs-express/templates/kafka/docker-compose.yaml b/incubator/nodejs-express/templates/kafka/docker-compose.yaml new file mode 100644 index 000000000..995271e12 --- /dev/null +++ b/incubator/nodejs-express/templates/kafka/docker-compose.yaml @@ -0,0 +1,30 @@ +version: '2' +services: + zookeeper: + image: strimzi/kafka:0.17.0-kafka-2.4.0 + command: [ + "sh", "-c", + "bin/zookeeper-server-start.sh config/zookeeper.properties" + ] + ports: + - "2181:2181" + environment: + LOG_DIR: /tmp/logs + + kafka: + image: strimzi/kafka:0.17.0-kafka-2.4.0 + command: [ + "sh", "-c", + "bin/kafka-server-start.sh config/server.properties --override listeners=$${KAFKA_LISTENERS} --override advertised.listeners=$${KAFKA_ADVERTISED_LISTENERS} --override zookeeper.connect=$${KAFKA_ZOOKEEPER_CONNECT}" + ] + depends_on: + - zookeeper + ports: + - "9092:9092" + expose: + - "9092" + environment: + LOG_DIR: "/tmp/logs" + KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092 + KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:9092 + KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181 diff --git a/incubator/nodejs-express/templates/kafka/package-lock.json b/incubator/nodejs-express/templates/kafka/package-lock.json new file mode 100644 index 000000000..db2b4fc24 --- /dev/null +++ b/incubator/nodejs-express/templates/kafka/package-lock.json @@ -0,0 +1,986 @@ +{ + "name": "nodejs-kafka-consumer", + "version": "0.1.0", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "ansi-colors": { + "version": "3.2.3", + "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.2.3.tgz", + "integrity": 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application", + "license": "Apache-2.0", + "main": "app.js", + "repository": { + "type": "git", + "url": "https://github.com/appsody/stacks.git", + "directory": "incubator/nodejs-express/templates/kafka" + }, + "scripts": { + "test": "mocha" + }, + "devDependencies": { + "chai": "^4.2.0", + "mocha": "^7.1.1" + } +} diff --git a/incubator/nodejs-express/templates/kafka/test/test.js b/incubator/nodejs-express/templates/kafka/test/test.js new file mode 100644 index 000000000..a90e95bf1 --- /dev/null +++ b/incubator/nodejs-express/templates/kafka/test/test.js @@ -0,0 +1,7 @@ +describe('Node.js Kafka Simple template', () => { + describe('app', () => { + it('can be required', () => { + const App = require('../'); + }); + }); +});