diff --git a/README.md b/README.md index f46b070..7a19ed6 100755 --- a/README.md +++ b/README.md @@ -35,6 +35,8 @@ The following parameters can be set in config files or in env variables: - ELASTICSEARCH_INDEX: the Elasticsearch index to store Kafka messages data, default value is 'submission-index' - ELASTICSEARCH_INDEX_TYPE: the Elasticsearch index type name, default value is 'submission' +Also note that there is a `/health` endpoint that checks for the health of the app. This sets up an expressjs server and listens on the environment variable `PORT`. It's not part of the configuration file and needs to be passed as an environment variable + ## Local Kafka setup - `http://kafka.apache.org/quickstart` contains details to setup and manage Kafka server, diff --git a/package-lock.json b/package-lock.json index 34c6639..66be579 100755 --- a/package-lock.json +++ b/package-lock.json @@ -14,6 +14,15 @@ "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.14.111.tgz", "integrity": "sha512-t2FwnkdqdZNYPJHTEF+Zf//j5d2I7UbM2Ng+vqqmUCE2RuiVVINJi9RlVdpKvqPqVItsJa0X+ra/tvmwLzlcgg==" }, + "accepts": { + "version": "1.3.5", + "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz", + "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=", + "requires": { + "mime-types": "~2.1.18", + "negotiator": "0.6.1" + } + }, "acorn": { "version": "5.7.1", "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.1.tgz", @@ -88,6 +97,11 @@ "sprintf-js": "~1.0.2" } }, + "array-flatten": { + "version": "1.1.1", + "resolved": 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+ "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw=" + }, "util-deprecate": { "version": "1.0.2", "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz", "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=", "dev": true }, + "utils-merge": { + "version": "1.0.1", + "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz", + "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=" + }, "uuid": { "version": "3.3.2", "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz", @@ -2225,6 +2613,11 @@ "spdx-expression-parse": "^3.0.0" } }, + "vary": { + "version": "1.1.2", + "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz", + "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=" + }, "which": { "version": "1.3.1", "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz", diff --git a/package.json b/package.json index 0f44782..50d4448 100755 --- a/package.json +++ b/package.json @@ -28,6 +28,7 @@ "joi": "^9.0.4", "lodash": "^4.17.10", "no-kafka": "^3.2.4", + "topcoder-healthcheck-dropin": "^1.0.2", "winston": "^2.2.0" }, "engines": { diff --git a/src/app.js b/src/app.js index fcf16dc..d2c1a37 100755 --- a/src/app.js +++ b/src/app.js @@ -9,6 +9,7 @@ const logger = require('./common/logger') const Kafka = require('no-kafka') const co = require('co') const ProcessorService = require('./services/ProcessorService') +const healthcheck = require('topcoder-healthcheck-dropin') // create consumer const options = { connectionString: config.KAFKA_URL } @@ -56,10 +57,25 @@ const dataHandler = (messageSet, topic, partition) => Promise.each(messageSet, ( .catch((err) => logger.error(err)) }) +// check if there is kafka connection alive +function check () { + if (!consumer.client.initialBrokers && !consumer.client.initialBrokers.length) { + return false + } + let connected = true + consumer.client.initialBrokers.forEach(conn => { + logger.debug(`url ${conn.server()} - connected=${conn.connected}`) + connected = conn.connected & connected + }) + return connected +} + consumer .init() // consume configured topics .then(() => { + healthcheck.init([check]) + const topics = [config.CREATE_DATA_TOPIC, config.UPDATE_DATA_TOPIC, config.DELETE_DATA_TOPIC] _.each(topics, (tp) => consumer.subscribe(tp, { time: Kafka.LATEST_OFFSET }, dataHandler)) })