feat(cluster): rewrite cluster discovering
* Discovering process adapted from EventStore scala client * Use DNS for first discover but also for reconnoctions (the aim is to be able to reconnect even if all nodes have new IP addresses eg. after rolling update in a cloud environment) * Being able to perform proper unit testing
This commit is contained in:
maniolias
parent
eb56e077f9
commit
f79a0444f6
5
index.d.ts
vendored
5
index.d.ts
vendored
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@ -1,8 +1,8 @@
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/// <reference types="node" />
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/// <reference types="Long" />
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import { EventEmitter } from "events";
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import { StrictEventEmitter } from "strict-event-emitter-types";
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import { EventEmitter } from 'events';
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import { StrictEventEmitter } from 'strict-event-emitter-types';
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// Expose classes
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export class Position {
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@ -380,6 +380,7 @@ export interface ConnectionSettings {
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// Cluster Settings
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clusterDns?: string,
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maxDiscoverAttempts?: number,
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discoverDelay?: number,
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externalGossipPort?: number,
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gossipTimeout?: number
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}
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@ -15,6 +15,7 @@
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"pretest": "npm run build",
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"test": "nodeunit",
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"test-debug": "TESTS_VERBOSE_LOGGING=1 nodeunit",
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"test:jest:watch": "jest --watch --coverage",
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"prepublishOnly": "npm run build && npm run gendocs",
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"gendocs": "rm -rf docs && jsdoc src -r -d docs"
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},
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@ -54,6 +55,7 @@
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"uuid": "^3.0.1"
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},
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"devDependencies": {
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"jest": "^26.4.2",
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"jsdoc": "^3.6.3",
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"nodeunit": "^0.11.3",
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"webpack": "^4.41.2",
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25
src/common/utils/shuffle.js
Normal file
25
src/common/utils/shuffle.js
Normal file
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@ -0,0 +1,25 @@
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function rndNext(min, max) {
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min = Math.ceil(min);
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max = Math.floor(max);
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return Math.floor(Math.random() * (max - min)) + min;
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}
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function shuffle (arr, from, to) {
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if (!to) {
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to = arr.length - 1;
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}
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if (!from) {
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from = 0;
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}
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const newArr = [...arr];
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if (from >= to) return;
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for (var current = from; current <= to; ++current) {
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var index = rndNext(current, to + 1);
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var tmp = newArr[index];
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newArr[index] = newArr[current];
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newArr[current] = tmp;
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}
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return newArr;
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};
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module.exports = shuffle;
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163
src/core/cluster/clusterDiscoverer.js
Normal file
163
src/core/cluster/clusterDiscoverer.js
Normal file
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@ -0,0 +1,163 @@
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const ClusterInfo = require('./clusterInfo');
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const GossipSeed = require('../../gossipSeed');
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const NodeEndPoints = require('./nodeEndpoints');
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const shuffle = require('../../common/utils/shuffle');
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function wait(ms) {
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return new Promise(resolve => setTimeout(resolve, ms));
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}
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/**
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* ClusterDiscoverer
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* @constructor
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* @class
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* @param {Logger} log - Logger instance
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* @param {Object} settings - Settings object
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* @param {Object} dnsService - DNS service to perform DNS lookup
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* @param {Object} httpService - HTTP service to perform http requests
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*/
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function ClusterDiscoverer(log, settings, dnsService, httpService) {
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if (!settings.clusterDns && (!settings.seeds || settings.seeds.length === 0))
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throw new Error('Both clusterDns and seeds are null/empty.');
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this._log = log;
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this._settings = settings;
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this._dnsService = dnsService;
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this._httpService = httpService;
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}
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/**
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* Discover Cluster endpoints
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* @param {Object} failedTcpEndPoint - The failed TCP endpoint which were used by the handler
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* @returns {Promise.<NodeEndPoints>}
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*/
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ClusterDiscoverer.prototype.discover = async function (failedTcpEndPoint) {
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let attempts = 0;
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while (attempts++ < this._settings.maxDiscoverAttempts) {
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try {
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const candidates = await this._getGossipCandidates(this._settings.managerExternalHttpPort);
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const gossipSeeds = candidates.filter(
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(candidate) =>
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!failedTcpEndPoint ||
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!(candidate.endPoint.host === failedTcpEndPoint.host && candidate.endPoint.port === failedTcpEndPoint.port)
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);
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let gossipSeedsIndex = 0;
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let clusterInfo;
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do {
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try {
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clusterInfo = await this._clusterInfo(gossipSeeds[gossipSeedsIndex], this._settings.gossipTimeout);
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if (!clusterInfo.bestNode) {
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this._log.info(
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`Discovering attempt ${attempts}/${this._settings.maxDiscoverAttempts} failed: no candidate found.`
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);
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continue;
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}
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} catch (err) {}
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} while (++gossipSeedsIndex < gossipSeeds.length);
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if (clusterInfo) {
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return NodeEndPoints.createFromGossipMember(clusterInfo.bestNode);
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}
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} catch (err) {
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this._log.info(
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`Discovering attempt ${attempts}/${this._settings.maxDiscoverAttempts} failed with error: ${err}.\n${err.stack}`
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);
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}
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await wait(this._settings.discoverDelay);
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}
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throw new Error(`Failed to discover candidate in ${this._settings.maxDiscoverAttempts} attempts.`);
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};
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/**
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* Get gossip candidates either from DNS or from gossipSeeds settings
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* @private
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* @param {Number} managerExternalHttpPort - Http port of the manager (or the http port of the node for OSS clusters)
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* @returns {Promise.<GossipSeed[]>}
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*/
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ClusterDiscoverer.prototype._getGossipCandidates = async function (managerExternalHttpPort) {
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const gossipSeeds =
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this._settings.seeds && this._settings.seeds.length > 0
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? this._settings.seeds
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: (await this._resolveDns(this._settings.clusterDns)).map(
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(address) => new GossipSeed({ host: address, port: managerExternalHttpPort }, undefined)
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);
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return shuffle(gossipSeeds);
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};
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/**
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* Resolve the cluster DNS discovery address to retrieve belonging ip addresses
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* @private
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* @param {String} clusterDns - Cluster DNS discovery address
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* @returns {Promise.<String[]>}
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*/
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ClusterDiscoverer.prototype._resolveDns = async function (clusterDns) {
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const dnsOptions = {
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family: 4,
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hints: this._dnsService.ADDRCONFIG | this._dnsService.V4MAPPED,
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all: true,
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};
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const result = await this._dnsService.lookup(clusterDns, dnsOptions);
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if (!result || result.length === 0) {
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throw new Error(`No result from dns lookup for ${clusterDns}`);
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}
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return result.map((address) => address.address);
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};
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/**
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* Get cluster informations (gossip members)
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* @param {GossipSeed} candidate - candidate to get informations from
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* @param {Number} timeout - timeout for the http request
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* @returns {Promise.<ClusterInfo>}
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*/
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ClusterDiscoverer.prototype._clusterInfo = async function (candidate, timeout) {
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return new Promise((resolve, reject) => {
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const options = {
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host: candidate.endPoint.host,
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port: candidate.endPoint.port,
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path: '/gossip?format=json',
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timeout: timeout,
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};
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if (candidate.hostHeader) {
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options.headers = {
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Host: candidate.hostHeader,
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};
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}
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const request = this._httpService.request(options, (res) => {
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if (res.statusCode !== 200) {
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this._log.info('Trying to get gossip from', candidate, 'failed with status code:', res.statusCode);
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reject(new Error(`Gossip candidate returns a ${res.statusCode} error`));
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return;
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}
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let result = '';
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res.on('data', (chunk) => {
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result += chunk.toString();
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});
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res.on('end', function () {
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try {
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result = JSON.parse(result);
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} catch (e) {
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reject(new Error('Unable to parse gossip response'));
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}
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resolve(new ClusterInfo(result.members));
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});
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});
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request.setTimeout(timeout);
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request.on('timeout', () => {
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this._log.info('Trying to get gossip from', candidate, 'timed out.');
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request.destroy();
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reject(new Error('Connection to gossip timed out'));
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});
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request.on('error', (error) => {
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this._log.info('Trying to get gossip from', candidate, 'errored', error);
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request.destroy();
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reject(new Error('Connection to gossip errored'));
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});
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request.end();
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});
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};
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module.exports = ClusterDiscoverer;
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36
src/core/cluster/clusterInfo.js
Normal file
36
src/core/cluster/clusterInfo.js
Normal file
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@ -0,0 +1,36 @@
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const MemberInfo = require('./memberInfo.js');
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const VNodeStates = Object.freeze({
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Initializing: 0,
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Unknown: 1,
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PreReplica: 2,
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CatchingUp: 3,
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Clone: 4,
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Slave: 5,
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PreMaster: 6,
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Master: 7,
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Manager: 8,
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ShuttingDown: 9,
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Shutdown: 10
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});
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function ClusterInfo(members) {
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this._members = members.map(member => new MemberInfo(member));
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Object.defineProperty(this, 'bestNode', {
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enumerable: true,
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get: function () {
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return this._getBestNode();
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}
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});
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}
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ClusterInfo.prototype._getBestNode = function () {
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return this._members
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.filter(member => member.isAlive && member.isAllowedToConnect)
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.sort(function (a, b) {
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return VNodeStates[b.state] - VNodeStates[a.state];
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})[0];
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}
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module.exports = ClusterInfo;
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73
src/core/cluster/memberInfo.js
Normal file
73
src/core/cluster/memberInfo.js
Normal file
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@ -0,0 +1,73 @@
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const NOT_ALLOWED_STATES = [
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'Manager',
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'ShuttingDown',
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'Shutdown'
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];
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function MemberInfo(informations) {
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this._instanceId = informations.instanceId;
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this._timeStamp = informations.timeStamp;
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this._state = informations.state;
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this._isAlive = informations.isAlive;
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this._internalTcpIp = informations.internalTcpIp;
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this._internalTcpPort = informations.internalTcpPort;
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this._internalSecureTcpPort = informations.internalSecureTcpPort;
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this._externalTcpIp = informations.externalTcpIp;
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this._externalTcpPort = informations.externalTcpPort;
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this._externalSecureTcpPort = informations.externalSecureTcpPort;
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this._internalHttpIp = informations.internalHttpIp;
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this._internalHttpPort = informations.internalHttpPort;
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this._externalHttpIp = informations.externalHttpIp;
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this._externalHttpPort = informations.externalHttpPort;
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this._lastCommitPosition = informations.lastCommitPosition;
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this._writerCheckpoint = informations.writerCheckpoint;
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this._chaserCheckpoint = informations.chaserCheckpoint;
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this._epochPosition = informations.epochPosition;
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this._epochNumber = informations.epochNumber;
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this._epochId = informations.epochId;
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this._nodePriority = informations.nodePriority;
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Object.defineProperty(this, 'state', {
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enumerable: true,
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get: function () {
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return this._state;
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}
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});
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Object.defineProperty(this, 'isAllowedToConnect', {
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enumerable: true,
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get: function () {
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return !NOT_ALLOWED_STATES.includes(this._state);
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}
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});
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Object.defineProperty(this, 'isAlive', {
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enumerable: true,
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get: function () {
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return this._isAlive;
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}
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});
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Object.defineProperty(this, 'externalTcpIp', {
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enumerable: true,
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get: function () {
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return this._externalTcpIp;
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}
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});
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Object.defineProperty(this, 'externalTcpPort', {
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enumerable: true,
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get: function () {
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return this._externalTcpPort;
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}
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});
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Object.defineProperty(this, 'externalSecureTcpPort', {
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enumerable: true,
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get: function () {
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return this._externalSecureTcpPort;
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}
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});
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}
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module.exports = MemberInfo;
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23
src/core/cluster/nodeEndpoints.js
Normal file
23
src/core/cluster/nodeEndpoints.js
Normal file
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@ -0,0 +1,23 @@
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function NodeEndPoints(tcpEndPoint, secureTcpEndPoint) {
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if (tcpEndPoint === null && secureTcpEndPoint === null) throw new Error('Both endpoints are null.');
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Object.defineProperties(this, {
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tcpEndPoint: {
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enumerable: true,
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value: tcpEndPoint
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},
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secureTcpEndPoint: {
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enumerable: true,
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value: secureTcpEndPoint
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}
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});
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}
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NodeEndPoints.createFromGossipMember = function (member) {
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const normTcp = { host: member.externalTcpIp, port: member.externalTcpPort };
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const secTcp = member.externalSecureTcpPort > 0
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? { host: member.externalTcpIp, port: member.externalSecureTcpPort }
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: null;
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return new NodeEndPoints(normTcp, secTcp);
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}
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module.exports = NodeEndPoints
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@ -1,9 +1,19 @@
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var EventStoreNodeConnection = require('./eventStoreNodeConnection');
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var StaticEndpointDiscoverer = require('./core/staticEndpointDiscoverer');
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var ClusterDnsEndPointDiscoverer = require('./core/clusterDnsEndPointDiscoverer');
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var ClusterDiscoverer = require('./core/cluster/clusterDiscoverer');
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var NoopLogger = require('./common/log/noopLogger');
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var ensure = require('./common/utils/ensure');
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const util = require('util');
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const http = require('http');
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const dns = require('dns');
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const dnsService = {
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lookup : util.promisify(dns.lookup),
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ADDRCONFIG: dns.ADDRCONFIG,
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V4MAPPED: dns.V4MAPPED
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};
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var defaultConnectionSettings = Object.freeze({
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log: new NoopLogger(),
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verboseLogging: false,
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@ -32,6 +42,7 @@ var defaultConnectionSettings = Object.freeze({
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// Cluster Settings
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clusterDns: '',
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maxDiscoverAttempts: 10,
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discoverDelay: 500,
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externalGossipPort: 0,
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gossipTimeout: 1000
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});
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@ -80,17 +91,17 @@ function createFromClusterDns(connectionSettings, clusterDns, externalGossipPort
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var mergedSettings = merge(defaultConnectionSettings, connectionSettings || {});
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var clusterSettings = {
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clusterDns: clusterDns,
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gossipSeeds: null,
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externalGossipPort: externalGossipPort,
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seeds: null,
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managerExternalHttpPort: externalGossipPort,
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maxDiscoverAttempts: mergedSettings.maxDiscoverAttempts,
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discoverDelay: mergedSettings.discoverDelay,
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gossipTimeout: mergedSettings.gossipTimeout
|
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};
|
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var endPointDiscoverer = new ClusterDnsEndPointDiscoverer(mergedSettings.log,
|
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clusterSettings.clusterDns,
|
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clusterSettings.maxDiscoverAttempts,
|
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clusterSettings.externalGossipPort,
|
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clusterSettings.gossipSeeds,
|
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clusterSettings.gossipTimeout
|
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var endPointDiscoverer = new ClusterDiscoverer(
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mergedSettings.log,
|
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clusterSettings,
|
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dnsService,
|
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http
|
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);
|
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return new EventStoreNodeConnection(mergedSettings, clusterSettings, endPointDiscoverer, connectionName);
|
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}
|
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|
|
@ -101,17 +112,17 @@ function createFromGossipSeeds(connectionSettings, gossipSeeds, connectionName)
|
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var mergedSettings = merge(defaultConnectionSettings, connectionSettings || {});
|
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var clusterSettings = {
|
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clusterDns: '',
|
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gossipSeeds: gossipSeeds,
|
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seeds: gossipSeeds,
|
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externalGossipPort: 0,
|
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maxDiscoverAttempts: mergedSettings.maxDiscoverAttempts,
|
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discoverDelay: mergedSettings.discoverDelay,
|
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gossipTimeout: mergedSettings.gossipTimeout
|
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};
|
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var endPointDiscoverer = new ClusterDnsEndPointDiscoverer(mergedSettings.log,
|
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clusterSettings.clusterDns,
|
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clusterSettings.maxDiscoverAttempts,
|
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clusterSettings.externalGossipPort,
|
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clusterSettings.gossipSeeds,
|
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clusterSettings.gossipTimeout
|
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var endPointDiscoverer = new ClusterDiscoverer(
|
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mergedSettings.log,
|
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clusterSettings,
|
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dnsService,
|
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http
|
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);
|
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return new EventStoreNodeConnection(mergedSettings, clusterSettings, endPointDiscoverer, connectionName);
|
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}
|
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|
|
|
|||
|
|
@ -1,7 +1,8 @@
|
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function GossipSeed(endPoint, hostName) {
|
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function GossipSeed(endPoint, hostName, hostHeader) {
|
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if (typeof endPoint !== 'object' || !endPoint.host || !endPoint.port) throw new TypeError('endPoint must be have host and port properties.');
|
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this.endPoint = endPoint;
|
||||
this.hostName = hostName;
|
||||
this.hostHeader = hostHeader;
|
||||
Object.freeze(this);
|
||||
}
|
||||
|
||||
|
|
|
|||
98
test/fixtures/gossip.json
vendored
Normal file
98
test/fixtures/gossip.json
vendored
Normal file
|
|
@ -0,0 +1,98 @@
|
|||
{
|
||||
"members": [
|
||||
{
|
||||
"instanceId": "bb16857d-373d-4233-a175-89c917a72329",
|
||||
"timeStamp": "2020-09-02T13:53:24.234898Z",
|
||||
"state": "Slave",
|
||||
"isAlive": false,
|
||||
"internalTcpIp": "10.0.0.1",
|
||||
"internalTcpPort": 1112,
|
||||
"internalSecureTcpPort": 0,
|
||||
"externalTcpIp": "10.0.0.1",
|
||||
"externalTcpPort": 1113,
|
||||
"externalSecureTcpPort": 0,
|
||||
"internalHttpIp": "10.0.0.1",
|
||||
"internalHttpPort": 2112,
|
||||
"externalHttpIp": "10.0.0.1",
|
||||
"externalHttpPort": 2113,
|
||||
"lastCommitPosition": 648923382,
|
||||
"writerCheckpoint": 648936339,
|
||||
"chaserCheckpoint": 648936339,
|
||||
"epochPosition": 551088596,
|
||||
"epochNumber": 201,
|
||||
"epochId": "d8f95f4b-167a-4487-9031-4d31a507e6d9",
|
||||
"nodePriority": 0
|
||||
},
|
||||
{
|
||||
"instanceId": "b3c18dcd-6476-467a-b7b8-d6672b74e9c2",
|
||||
"timeStamp": "2020-09-02T13:56:06.189428Z",
|
||||
"state": "CatchingUp",
|
||||
"isAlive": true,
|
||||
"internalTcpIp": "10.0.0.2",
|
||||
"internalTcpPort": 1112,
|
||||
"internalSecureTcpPort": 0,
|
||||
"externalTcpIp": "10.0.0.2",
|
||||
"externalTcpPort": 1113,
|
||||
"externalSecureTcpPort": 0,
|
||||
"internalHttpIp": "10.0.0.2",
|
||||
"internalHttpPort": 2112,
|
||||
"externalHttpIp": "10.0.0.2",
|
||||
"externalHttpPort": 2113,
|
||||
"lastCommitPosition": -1,
|
||||
"writerCheckpoint": 0,
|
||||
"chaserCheckpoint": 0,
|
||||
"epochPosition": -1,
|
||||
"epochNumber": -1,
|
||||
"epochId": "00000000-0000-0000-0000-000000000000",
|
||||
"nodePriority": 0
|
||||
},
|
||||
{
|
||||
"instanceId": "e802a2b5-826c-4bd5-84d0-c9d1387fbf79",
|
||||
"timeStamp": "2020-09-02T13:56:07.391534Z",
|
||||
"state": "Master",
|
||||
"isAlive": true,
|
||||
"internalTcpIp": "10.0.0.3",
|
||||
"internalTcpPort": 1112,
|
||||
"internalSecureTcpPort": 0,
|
||||
"externalTcpIp": "10.0.0.3",
|
||||
"externalTcpPort": 1113,
|
||||
"externalSecureTcpPort": 0,
|
||||
"internalHttpIp": "10.0.0.3",
|
||||
"internalHttpPort": 2112,
|
||||
"externalHttpIp": "10.0.0.3",
|
||||
"externalHttpPort": 2113,
|
||||
"lastCommitPosition": 649007631,
|
||||
"writerCheckpoint": 649024685,
|
||||
"chaserCheckpoint": 649024685,
|
||||
"epochPosition": 649023795,
|
||||
"epochNumber": 202,
|
||||
"epochId": "1f17695d-6558-4d8b-ba60-2ae273b11e09",
|
||||
"nodePriority": 0
|
||||
},
|
||||
{
|
||||
"instanceId": "24bb9031-5f21-436c-a7b5-c5f03a95e938",
|
||||
"timeStamp": "2020-09-02T13:54:39.023053Z",
|
||||
"state": "Slave",
|
||||
"isAlive": false,
|
||||
"internalTcpIp": "10.0.0.4",
|
||||
"internalTcpPort": 1112,
|
||||
"internalSecureTcpPort": 0,
|
||||
"externalTcpIp": "10.0.0.4",
|
||||
"externalTcpPort": 1113,
|
||||
"externalSecureTcpPort": 0,
|
||||
"internalHttpIp": "10.0.0.4",
|
||||
"internalHttpPort": 2112,
|
||||
"externalHttpIp": "10.0.0.4",
|
||||
"externalHttpPort": 2113,
|
||||
"lastCommitPosition": 649007631,
|
||||
"writerCheckpoint": 649023795,
|
||||
"chaserCheckpoint": 649023795,
|
||||
"epochPosition": 551088596,
|
||||
"epochNumber": 201,
|
||||
"epochId": "d8f95f4b-167a-4487-9031-4d31a507e6d9",
|
||||
"nodePriority": 0
|
||||
}
|
||||
],
|
||||
"serverIp": "10.0.0.3",
|
||||
"serverPort": 2112
|
||||
}
|
||||
693
test/unit/core/clusterDiscoverer.test.js
Normal file
693
test/unit/core/clusterDiscoverer.test.js
Normal file
|
|
@ -0,0 +1,693 @@
|
|||
const fs = require('fs');
|
||||
const path = require('path');
|
||||
const dns = require('dns');
|
||||
|
||||
const ClusterDiscoverer = require('../../../src/core/cluster/clusterDiscoverer');
|
||||
const ClusterInfo = require('../../../src/core/cluster/clusterInfo');
|
||||
const GossipSeed = require('../../../src/gossipSeed');
|
||||
const NodeEndPoints = require('../../../src/core/cluster/nodeEndpoints');
|
||||
|
||||
const logger = { info: () => {} };
|
||||
|
||||
describe('ClusterDiscoverer', () => {
|
||||
const mockDns = {
|
||||
ADDRCONFIG: dns.ADDRCONFIG,
|
||||
V4MAPPED: dns.V4MAPPED,
|
||||
};
|
||||
const mockHttp = {};
|
||||
const settings = {
|
||||
clusterDns: 'my-discover.com:2113',
|
||||
maxDiscoverAttempts: 10,
|
||||
discoverDelay: 10,
|
||||
managerExternalHttpPort: 2113,
|
||||
seeds: null,
|
||||
gossipTimeout: 1000,
|
||||
};
|
||||
const tClusterInfo = new ClusterInfo([
|
||||
{
|
||||
instanceId: 'bb16857d-373d-4233-a175-89c917a72329',
|
||||
timeStamp: '2020-09-02T13:53:24.234898Z',
|
||||
state: 'Slave',
|
||||
isAlive: false,
|
||||
internalTcpIp: '10.0.0.1',
|
||||
internalTcpPort: 1112,
|
||||
internalSecureTcpPort: 0,
|
||||
externalTcpIp: '10.0.0.1',
|
||||
externalTcpPort: 1113,
|
||||
externalSecureTcpPort: 0,
|
||||
internalHttpIp: '10.0.0.1',
|
||||
internalHttpPort: 2112,
|
||||
externalHttpIp: '10.0.0.1',
|
||||
externalHttpPort: 2113,
|
||||
lastCommitPosition: 648923382,
|
||||
writerCheckpoint: 648936339,
|
||||
chaserCheckpoint: 648936339,
|
||||
epochPosition: 551088596,
|
||||
epochNumber: 201,
|
||||
epochId: 'd8f95f4b-167a-4487-9031-4d31a507e6d9',
|
||||
nodePriority: 0,
|
||||
},
|
||||
{
|
||||
instanceId: 'b3c18dcd-6476-467a-b7b8-d6672b74e9c2',
|
||||
timeStamp: '2020-09-02T13:56:06.189428Z',
|
||||
state: 'CatchingUp',
|
||||
isAlive: true,
|
||||
internalTcpIp: '10.0.0.2',
|
||||
internalTcpPort: 1112,
|
||||
internalSecureTcpPort: 0,
|
||||
externalTcpIp: '10.0.0.2',
|
||||
externalTcpPort: 1113,
|
||||
externalSecureTcpPort: 0,
|
||||
internalHttpIp: '10.0.0.2',
|
||||
internalHttpPort: 2112,
|
||||
externalHttpIp: '10.0.0.2',
|
||||
externalHttpPort: 2113,
|
||||
lastCommitPosition: -1,
|
||||
writerCheckpoint: 0,
|
||||
chaserCheckpoint: 0,
|
||||
epochPosition: -1,
|
||||
epochNumber: -1,
|
||||
epochId: '00000000-0000-0000-0000-000000000000',
|
||||
nodePriority: 0,
|
||||
},
|
||||
{
|
||||
instanceId: 'e802a2b5-826c-4bd5-84d0-c9d1387fbf79',
|
||||
timeStamp: '2020-09-02T13:56:07.391534Z',
|
||||
state: 'Master',
|
||||
isAlive: true,
|
||||
internalTcpIp: '10.0.0.3',
|
||||
internalTcpPort: 1112,
|
||||
internalSecureTcpPort: 0,
|
||||
externalTcpIp: '10.0.0.3',
|
||||
externalTcpPort: 1113,
|
||||
externalSecureTcpPort: 0,
|
||||
internalHttpIp: '10.0.0.3',
|
||||
internalHttpPort: 2112,
|
||||
externalHttpIp: '10.0.0.3',
|
||||
externalHttpPort: 2113,
|
||||
lastCommitPosition: 649007631,
|
||||
writerCheckpoint: 649024685,
|
||||
chaserCheckpoint: 649024685,
|
||||
epochPosition: 649023795,
|
||||
epochNumber: 202,
|
||||
epochId: '1f17695d-6558-4d8b-ba60-2ae273b11e09',
|
||||
nodePriority: 0,
|
||||
},
|
||||
{
|
||||
instanceId: '24bb9031-5f21-436c-a7b5-c5f03a95e938',
|
||||
timeStamp: '2020-09-02T13:54:39.023053Z',
|
||||
state: 'Slave',
|
||||
isAlive: false,
|
||||
internalTcpIp: '10.0.0.4',
|
||||
internalTcpPort: 1112,
|
||||
internalSecureTcpPort: 0,
|
||||
externalTcpIp: '10.0.0.4',
|
||||
externalTcpPort: 1113,
|
||||
externalSecureTcpPort: 0,
|
||||
internalHttpIp: '10.0.0.4',
|
||||
internalHttpPort: 2112,
|
||||
externalHttpIp: '10.0.0.4',
|
||||
externalHttpPort: 2113,
|
||||
lastCommitPosition: 649007631,
|
||||
writerCheckpoint: 649023795,
|
||||
chaserCheckpoint: 649023795,
|
||||
epochPosition: 551088596,
|
||||
epochNumber: 201,
|
||||
epochId: 'd8f95f4b-167a-4487-9031-4d31a507e6d9',
|
||||
nodePriority: 0,
|
||||
},
|
||||
]);
|
||||
const tClusterInfoNoBestNode = new ClusterInfo([
|
||||
{
|
||||
instanceId: 'bb16857d-373d-4233-a175-89c917a72329',
|
||||
timeStamp: '2020-09-02T13:53:24.234898Z',
|
||||
state: 'Manager',
|
||||
isAlive: true,
|
||||
internalTcpIp: '10.0.0.1',
|
||||
internalTcpPort: 1112,
|
||||
internalSecureTcpPort: 0,
|
||||
externalTcpIp: '10.0.0.1',
|
||||
externalTcpPort: 1113,
|
||||
externalSecureTcpPort: 0,
|
||||
internalHttpIp: '10.0.0.1',
|
||||
internalHttpPort: 2112,
|
||||
externalHttpIp: '10.0.0.1',
|
||||
externalHttpPort: 2113,
|
||||
lastCommitPosition: 648923382,
|
||||
writerCheckpoint: 648936339,
|
||||
chaserCheckpoint: 648936339,
|
||||
epochPosition: 551088596,
|
||||
epochNumber: 201,
|
||||
epochId: 'd8f95f4b-167a-4487-9031-4d31a507e6d9',
|
||||
nodePriority: 0,
|
||||
},
|
||||
{
|
||||
instanceId: 'b3c18dcd-6476-467a-b7b8-d6672b74e9c2',
|
||||
timeStamp: '2020-09-02T13:56:06.189428Z',
|
||||
state: 'CatchingUp',
|
||||
isAlive: false,
|
||||
internalTcpIp: '10.0.0.2',
|
||||
internalTcpPort: 1112,
|
||||
internalSecureTcpPort: 0,
|
||||
externalTcpIp: '10.0.0.2',
|
||||
externalTcpPort: 1113,
|
||||
externalSecureTcpPort: 0,
|
||||
internalHttpIp: '10.0.0.2',
|
||||
internalHttpPort: 2112,
|
||||
externalHttpIp: '10.0.0.2',
|
||||
externalHttpPort: 2113,
|
||||
lastCommitPosition: -1,
|
||||
writerCheckpoint: 0,
|
||||
chaserCheckpoint: 0,
|
||||
epochPosition: -1,
|
||||
epochNumber: -1,
|
||||
epochId: '00000000-0000-0000-0000-000000000000',
|
||||
nodePriority: 0,
|
||||
},
|
||||
{
|
||||
instanceId: 'e802a2b5-826c-4bd5-84d0-c9d1387fbf79',
|
||||
timeStamp: '2020-09-02T13:56:07.391534Z',
|
||||
state: 'Master',
|
||||
isAlive: false,
|
||||
internalTcpIp: '10.0.0.3',
|
||||
internalTcpPort: 1112,
|
||||
internalSecureTcpPort: 0,
|
||||
externalTcpIp: '10.0.0.3',
|
||||
externalTcpPort: 1113,
|
||||
externalSecureTcpPort: 0,
|
||||
internalHttpIp: '10.0.0.3',
|
||||
internalHttpPort: 2112,
|
||||
externalHttpIp: '10.0.0.3',
|
||||
externalHttpPort: 2113,
|
||||
lastCommitPosition: 649007631,
|
||||
writerCheckpoint: 649024685,
|
||||
chaserCheckpoint: 649024685,
|
||||
epochPosition: 649023795,
|
||||
epochNumber: 202,
|
||||
epochId: '1f17695d-6558-4d8b-ba60-2ae273b11e09',
|
||||
nodePriority: 0,
|
||||
},
|
||||
{
|
||||
instanceId: '24bb9031-5f21-436c-a7b5-c5f03a95e938',
|
||||
timeStamp: '2020-09-02T13:54:39.023053Z',
|
||||
state: 'Slave',
|
||||
isAlive: false,
|
||||
internalTcpIp: '10.0.0.4',
|
||||
internalTcpPort: 1112,
|
||||
internalSecureTcpPort: 0,
|
||||
externalTcpIp: '10.0.0.4',
|
||||
externalTcpPort: 1113,
|
||||
externalSecureTcpPort: 0,
|
||||
internalHttpIp: '10.0.0.4',
|
||||
internalHttpPort: 2112,
|
||||
externalHttpIp: '10.0.0.4',
|
||||
externalHttpPort: 2113,
|
||||
lastCommitPosition: 649007631,
|
||||
writerCheckpoint: 649023795,
|
||||
chaserCheckpoint: 649023795,
|
||||
epochPosition: 551088596,
|
||||
epochNumber: 201,
|
||||
epochId: 'd8f95f4b-167a-4487-9031-4d31a507e6d9',
|
||||
nodePriority: 0,
|
||||
},
|
||||
]);
|
||||
const discoverer = new ClusterDiscoverer(logger, settings, mockDns, mockHttp);
|
||||
const discovererWithGossipSeeds = new ClusterDiscoverer(
|
||||
logger,
|
||||
{
|
||||
...settings,
|
||||
...{
|
||||
seeds: [
|
||||
new GossipSeed({
|
||||
host: '10.0.0.1',
|
||||
port: 2113,
|
||||
}),
|
||||
new GossipSeed({
|
||||
host: '10.0.0.1',
|
||||
port: 2113,
|
||||
}),
|
||||
new GossipSeed({
|
||||
host: '10.0.0.1',
|
||||
port: 2113,
|
||||
}),
|
||||
],
|
||||
},
|
||||
},
|
||||
mockDns,
|
||||
mockHttp
|
||||
);
|
||||
|
||||
afterEach(() => {
|
||||
jest.clearAllMocks();
|
||||
});
|
||||
|
||||
describe('constructor', () => {
|
||||
test('Should be defined', () => {
|
||||
expect(discoverer).toBeDefined();
|
||||
});
|
||||
|
||||
test('Should throw an error', () => {
|
||||
expect(
|
||||
() =>
|
||||
new ClusterDiscoverer(
|
||||
logger,
|
||||
{
|
||||
clusterDns: null,
|
||||
maxDiscoverAttempts: 10,
|
||||
managerExternalHttpPort: 2113,
|
||||
seeds: null,
|
||||
gossipTimeout: 1000,
|
||||
},
|
||||
mockDns,
|
||||
mockHttp
|
||||
)
|
||||
).toThrow();
|
||||
});
|
||||
expect(
|
||||
() =>
|
||||
new ClusterDiscoverer(
|
||||
logger,
|
||||
{
|
||||
clusterDns: null,
|
||||
maxDiscoverAttempts: 10,
|
||||
managerExternalHttpPort: 2113,
|
||||
seeds: [],
|
||||
gossipTimeout: 1000,
|
||||
},
|
||||
mockDns,
|
||||
mockHttp
|
||||
)
|
||||
).toThrow();
|
||||
});
|
||||
|
||||
describe('#_resolveDns', () => {
|
||||
test('Should call lookup', async () => {
|
||||
mockDns.lookup = jest.fn().mockResolvedValue([
|
||||
{
|
||||
address: '10.0.0.1',
|
||||
family: 4,
|
||||
},
|
||||
]);
|
||||
await discoverer._resolveDns('my-discover.com:2113');
|
||||
expect(mockDns.lookup).toHaveBeenCalledWith('my-discover.com:2113', {
|
||||
family: 4,
|
||||
hints: dns.ADDRCONFIG | dns.V4MAPPED,
|
||||
all: true,
|
||||
});
|
||||
});
|
||||
|
||||
test('Should reject if dnsService fails', async () => {
|
||||
mockDns.lookup = jest.fn().mockRejectedValue(new Error('Unexpected DNS error'));
|
||||
await expect(discoverer._resolveDns('my-discover.com:2113')).rejects.toBeDefined();
|
||||
});
|
||||
|
||||
test('Should reject if no addresses are returned', async () => {
|
||||
mockDns.lookup = jest.fn().mockResolvedValue([]);
|
||||
await expect(discoverer._resolveDns('my-discover.com:2113')).rejects.toEqual(
|
||||
new Error('No result from dns lookup for my-discover.com:2113')
|
||||
);
|
||||
});
|
||||
|
||||
test('Should return a list of candidate addresses', async () => {
|
||||
mockDns.lookup = jest.fn().mockResolvedValue([
|
||||
{
|
||||
address: '10.0.0.1',
|
||||
family: 4,
|
||||
},
|
||||
{
|
||||
address: '10.0.0.2',
|
||||
family: 4,
|
||||
},
|
||||
{
|
||||
address: '10.0.0.3',
|
||||
family: 4,
|
||||
},
|
||||
]);
|
||||
const candidates = await discoverer._resolveDns('my-discover.com:2113');
|
||||
expect(candidates).toEqual(['10.0.0.1', '10.0.0.2', '10.0.0.3']);
|
||||
});
|
||||
});
|
||||
|
||||
describe('#_clusterInfo', () => {
|
||||
test('Should call httpService.request to get cluster informations', async () => {
|
||||
const tCandidate = new GossipSeed(
|
||||
{
|
||||
host: '10.0.0.1',
|
||||
port: '2113',
|
||||
},
|
||||
undefined
|
||||
);
|
||||
const tTimeout = 1000;
|
||||
const requestEvents = {};
|
||||
let responseCallback;
|
||||
mockHttp.request = jest.fn((options, callback) => {
|
||||
responseCallback = callback;
|
||||
return {
|
||||
setTimeout: jest.fn(() => ({})),
|
||||
on: (type, callback) => {
|
||||
requestEvents[type] = callback;
|
||||
},
|
||||
end: () => {},
|
||||
destroy: () => {},
|
||||
};
|
||||
});
|
||||
discoverer._clusterInfo(tCandidate, tTimeout);
|
||||
expect(mockHttp.request).toHaveBeenCalledWith(
|
||||
{
|
||||
host: tCandidate.endPoint.host,
|
||||
port: tCandidate.endPoint.port,
|
||||
path: '/gossip?format=json',
|
||||
timeout: tTimeout,
|
||||
},
|
||||
expect.anything()
|
||||
);
|
||||
});
|
||||
|
||||
test('Should call httpService.request to get cluster informations with host header', async () => {
|
||||
const tCandidate = new GossipSeed(
|
||||
{
|
||||
host: '10.0.0.1',
|
||||
port: '2113',
|
||||
},
|
||||
undefined,
|
||||
'MyHost'
|
||||
);
|
||||
const tTimeout = 1000;
|
||||
const requestEvents = {};
|
||||
let responseCallback;
|
||||
mockHttp.request = jest.fn((options, callback) => {
|
||||
responseCallback = callback;
|
||||
return {
|
||||
setTimeout: jest.fn(() => ({})),
|
||||
on: (type, callback) => {
|
||||
requestEvents[type] = callback;
|
||||
},
|
||||
end: () => {},
|
||||
destroy: () => {},
|
||||
};
|
||||
});
|
||||
discoverer._clusterInfo(tCandidate, tTimeout);
|
||||
expect(mockHttp.request).toHaveBeenCalledWith(
|
||||
{
|
||||
host: tCandidate.endPoint.host,
|
||||
port: tCandidate.endPoint.port,
|
||||
path: '/gossip?format=json',
|
||||
timeout: tTimeout,
|
||||
headers: {
|
||||
Host: tCandidate.hostHeader,
|
||||
},
|
||||
},
|
||||
expect.anything()
|
||||
);
|
||||
});
|
||||
|
||||
test('Should return a timeout error if the sockets fails to be connected in the specified timeout', async () => {
|
||||
const tCandidate = new GossipSeed({
|
||||
host: '10.0.0.1',
|
||||
port: '2113',
|
||||
});
|
||||
const tTimeout = 1000;
|
||||
const requestEvents = {};
|
||||
let responseCallback;
|
||||
mockHttp.request = jest.fn((options, callback) => {
|
||||
responseCallback = callback;
|
||||
return {
|
||||
setTimeout: jest.fn(() => ({})),
|
||||
on: (type, callback) => {
|
||||
requestEvents[type] = callback;
|
||||
},
|
||||
end: () => {
|
||||
requestEvents['timeout']();
|
||||
},
|
||||
destroy: () => {},
|
||||
};
|
||||
});
|
||||
await expect(discoverer._clusterInfo(tCandidate, tTimeout)).rejects.toThrow(
|
||||
new Error('Connection to gossip timed out')
|
||||
);
|
||||
});
|
||||
|
||||
test('Should return an error if the http request emits an error', async () => {
|
||||
const tCandidate = new GossipSeed({
|
||||
host: '10.0.0.1',
|
||||
port: '2113',
|
||||
});
|
||||
const tTimeout = 1000;
|
||||
const requestEvents = {};
|
||||
let responseCallback;
|
||||
mockHttp.request = jest.fn((options, callback) => {
|
||||
responseCallback = callback;
|
||||
return {
|
||||
setTimeout: jest.fn(() => ({})),
|
||||
on: (type, callback) => {
|
||||
requestEvents[type] = callback;
|
||||
},
|
||||
end: () => {
|
||||
requestEvents['error'](new Error('Request error'));
|
||||
},
|
||||
destroy: () => {},
|
||||
};
|
||||
});
|
||||
await expect(discoverer._clusterInfo(tCandidate, tTimeout)).rejects.toThrow(
|
||||
new Error('Connection to gossip errored')
|
||||
);
|
||||
});
|
||||
|
||||
test("Should return an error if the candidate doesn't returns a 200 code", async () => {
|
||||
const tCandidate = new GossipSeed({
|
||||
host: '10.0.0.1',
|
||||
port: '2113',
|
||||
});
|
||||
const tTimeout = 1000;
|
||||
const requestEvents = {};
|
||||
let responseCallback;
|
||||
mockHttp.request = jest.fn((options, callback) => {
|
||||
responseCallback = callback;
|
||||
return {
|
||||
setTimeout: jest.fn(() => ({})),
|
||||
on: (type, callback) => {
|
||||
requestEvents[type] = callback;
|
||||
},
|
||||
end: () => {
|
||||
callback({
|
||||
statusCode: 503,
|
||||
on: (type, callback) => {
|
||||
responseEvents[type] = callback;
|
||||
},
|
||||
});
|
||||
},
|
||||
destroy: () => {},
|
||||
};
|
||||
});
|
||||
await expect(discoverer._clusterInfo(tCandidate, tTimeout)).rejects.toThrow(
|
||||
new Error('Gossip candidate returns a 503 error')
|
||||
);
|
||||
});
|
||||
|
||||
test('Should return an error if the response is not a valid JSON', async () => {
|
||||
const tCandidate = new GossipSeed({
|
||||
host: '10.0.0.1',
|
||||
port: '2113',
|
||||
});
|
||||
const tTimeout = 1000;
|
||||
let responseCallback;
|
||||
const requestEvents = {};
|
||||
const responseEvents = {};
|
||||
mockHttp.request = jest.fn((options, callback) => {
|
||||
responseCallback = callback;
|
||||
return {
|
||||
setTimeout: jest.fn(() => ({})),
|
||||
on: (type, callback) => {
|
||||
requestEvents[type] = callback;
|
||||
},
|
||||
end: () => {
|
||||
callback({
|
||||
statusCode: 200,
|
||||
on: (type, callback) => {
|
||||
responseEvents[type] = callback;
|
||||
},
|
||||
});
|
||||
responseEvents['data']('Not a JSON response');
|
||||
responseEvents['end']();
|
||||
},
|
||||
destroy: () => {},
|
||||
};
|
||||
});
|
||||
await expect(discoverer._clusterInfo(tCandidate, tTimeout)).rejects.toThrow(
|
||||
new Error('Unable to parse gossip response')
|
||||
);
|
||||
});
|
||||
|
||||
test('Should return the member informations for the cluster', async () => {
|
||||
const tCandidate = new GossipSeed({
|
||||
host: '10.0.0.1',
|
||||
port: '2113',
|
||||
});
|
||||
const tTimeout = 1000;
|
||||
const requestEvents = {};
|
||||
const responseEvents = {};
|
||||
mockHttp.request = jest.fn((options, callback) => {
|
||||
return {
|
||||
setTimeout: jest.fn(() => ({})),
|
||||
on: (type, callback) => {
|
||||
requestEvents[type] = callback;
|
||||
},
|
||||
end: () => {
|
||||
callback({
|
||||
statusCode: 200,
|
||||
on: (type, callback) => {
|
||||
responseEvents[type] = callback;
|
||||
},
|
||||
});
|
||||
responseEvents['data'](fs.readFileSync(path.resolve(__dirname, '../../fixtures/gossip.json')));
|
||||
responseEvents['end']();
|
||||
},
|
||||
destroy: () => {},
|
||||
};
|
||||
});
|
||||
const infos = await discoverer._clusterInfo(tCandidate, tTimeout);
|
||||
expect(infos).toEqual(tClusterInfo);
|
||||
});
|
||||
});
|
||||
|
||||
describe('#_getGossipCandidates', () => {
|
||||
test('Should get from dns if gossipSeeds are empty', async () => {
|
||||
discoverer._resolveDns = jest.fn().mockResolvedValue(['10.0.0.1', '10.0.0.2', '10.0.0.3']);
|
||||
const candidates = await discoverer._getGossipCandidates(settings.managerExternalHttpPort);
|
||||
expect(discoverer._resolveDns).toHaveBeenCalled();
|
||||
expect(candidates).toHaveLength(3);
|
||||
for (let i in candidates) {
|
||||
expect(candidates[i]).toBeInstanceOf(GossipSeed);
|
||||
}
|
||||
});
|
||||
|
||||
test('Should get gossipSeeds if present', async () => {
|
||||
discovererWithGossipSeeds._resolveDns = jest.fn();
|
||||
const candidates = await discovererWithGossipSeeds._getGossipCandidates(settings.managerExternalHttpPort);
|
||||
expect(discovererWithGossipSeeds._resolveDns).not.toHaveBeenCalled();
|
||||
expect(candidates).toHaveLength(3);
|
||||
for (let i in candidates) {
|
||||
expect(candidates[i]).toBeInstanceOf(GossipSeed);
|
||||
}
|
||||
});
|
||||
});
|
||||
|
||||
describe('#discover', () => {
|
||||
test('Should get resolve dns discover url to get IP addresses of the eventstore node', async () => {
|
||||
discoverer._resolveDns = jest.fn().mockResolvedValue(['10.0.0.1', '10.0.0.2', '10.0.0.3']);
|
||||
discoverer._clusterInfo = jest.fn().mockResolvedValue(tClusterInfo);
|
||||
await discoverer.discover();
|
||||
expect(discoverer._resolveDns).toHaveBeenCalledWith(settings.clusterDns);
|
||||
});
|
||||
|
||||
test('Should call _clusterInfo with candidate', async () => {
|
||||
discoverer._resolveDns = jest.fn().mockResolvedValue(['10.0.0.1', '10.0.0.2', '10.0.0.3']);
|
||||
discoverer._clusterInfo = jest.fn().mockResolvedValue(tClusterInfo);
|
||||
await discoverer.discover();
|
||||
expect(discoverer._clusterInfo).toHaveBeenCalledWith(
|
||||
new GossipSeed({ host: '10.0.0.1', port: settings.managerExternalHttpPort }),
|
||||
settings.gossipTimeout
|
||||
);
|
||||
});
|
||||
|
||||
test('Should call _clusterInfo with candidate from gossipSeed if provided', async () => {
|
||||
discovererWithGossipSeeds._resolveDns = jest.fn().mockResolvedValue();
|
||||
discovererWithGossipSeeds._clusterInfo = jest.fn().mockResolvedValue(tClusterInfo);
|
||||
await discovererWithGossipSeeds.discover();
|
||||
expect(discovererWithGossipSeeds._resolveDns).not.toHaveBeenCalled();
|
||||
});
|
||||
|
||||
test('Should return the bestNode', async () => {
|
||||
discoverer._resolveDns = jest.fn().mockResolvedValue(['10.0.0.1', '10.0.0.2', '10.0.0.3']);
|
||||
discoverer._clusterInfo = jest.fn().mockResolvedValue(tClusterInfo);
|
||||
const node = await discoverer.discover();
|
||||
expect(node).toEqual(
|
||||
new NodeEndPoints(
|
||||
{
|
||||
host: '10.0.0.3',
|
||||
port: 1113,
|
||||
},
|
||||
null
|
||||
)
|
||||
);
|
||||
});
|
||||
|
||||
test('Should try to call each candidates until it get clusterInfo with bestNode', async () => {
|
||||
discoverer._resolveDns = jest.fn().mockResolvedValue(['10.0.0.1', '10.0.0.2', '10.0.0.3']);
|
||||
discoverer._clusterInfo = jest.fn().mockImplementation(async (candidate) => {
|
||||
if (candidate.endPoint.host === '10.0.0.3') {
|
||||
return tClusterInfo;
|
||||
}
|
||||
throw new Error('Gossip candidate returns a 503 error');
|
||||
});
|
||||
const node = await discoverer.discover();
|
||||
expect(node).toEqual(
|
||||
new NodeEndPoints(
|
||||
{
|
||||
host: '10.0.0.3',
|
||||
port: 1113,
|
||||
},
|
||||
null
|
||||
)
|
||||
);
|
||||
expect(discoverer._clusterInfo).toHaveBeenCalledTimes(3);
|
||||
});
|
||||
|
||||
test('Should fail if the we reach the maxDiscoverAttempts limits (no bestNode is found)', async () => {
|
||||
discoverer._resolveDns = jest.fn().mockResolvedValue(['10.0.0.1', '10.0.0.2', '10.0.0.3']);
|
||||
discoverer._clusterInfo = jest.fn().mockResolvedValue(tClusterInfoNoBestNode);
|
||||
await expect(discoverer.discover()).rejects.toEqual(
|
||||
new Error(`Failed to discover candidate in ${settings.maxDiscoverAttempts} attempts.`)
|
||||
);
|
||||
expect(discoverer._resolveDns).toHaveBeenCalledTimes(settings.maxDiscoverAttempts);
|
||||
expect(discoverer._resolveDns).toHaveBeenCalledTimes(settings.maxDiscoverAttempts);
|
||||
});
|
||||
|
||||
test('Should fail if the we reach the maxDiscoverAttempts limits (all resolveDns attempts fails)', async () => {
|
||||
discoverer._resolveDns = jest.fn().mockRejectedValue(new Error('Connection to gossip timed out'));
|
||||
await expect(discoverer.discover()).rejects.toEqual(
|
||||
new Error(`Failed to discover candidate in ${settings.maxDiscoverAttempts} attempts.`)
|
||||
);
|
||||
expect(discoverer._resolveDns).toHaveBeenCalledTimes(settings.maxDiscoverAttempts);
|
||||
});
|
||||
|
||||
test('Should fail if the we reach the maxDiscoverAttempts limits (all clusterInfo attempts fails)', async () => {
|
||||
discoverer._resolveDns = jest.fn().mockResolvedValue(['10.0.0.1', '10.0.0.2', '10.0.0.3']);
|
||||
discoverer._clusterInfo = jest.fn().mockRejectedValue(new Error('Gossip candidate returns a 503 error'));
|
||||
await expect(discoverer.discover()).rejects.toEqual(
|
||||
new Error(`Failed to discover candidate in ${settings.maxDiscoverAttempts} attempts.`)
|
||||
);
|
||||
expect(discoverer._resolveDns).toHaveBeenCalledTimes(settings.maxDiscoverAttempts);
|
||||
expect(discoverer._resolveDns).toHaveBeenCalledTimes(settings.maxDiscoverAttempts);
|
||||
});
|
||||
|
||||
test('Should try to call each candidates expect failed one until it get clusterInfo with bestNode', async () => {
|
||||
discoverer._resolveDns = jest.fn().mockResolvedValue(['10.0.0.1', '10.0.0.2', '10.0.0.3']);
|
||||
discoverer._clusterInfo = jest.fn().mockImplementation(async (candidate) => {
|
||||
if (candidate.endPoint.host === '10.0.0.3') {
|
||||
return tClusterInfo;
|
||||
}
|
||||
throw new Error('Gossip candidate returns a 503 error');
|
||||
});
|
||||
const node = await discoverer.discover({ host: '10.0.0.2', port: 2113 });
|
||||
expect(node).toEqual(
|
||||
new NodeEndPoints(
|
||||
{
|
||||
host: '10.0.0.3',
|
||||
port: 1113,
|
||||
},
|
||||
null
|
||||
)
|
||||
);
|
||||
expect(discoverer._clusterInfo).toHaveBeenCalledTimes(2);
|
||||
expect(discoverer._clusterInfo).toHaveBeenCalledWith(
|
||||
new GossipSeed({ host: '10.0.0.1', port: 2113 }),
|
||||
settings.gossipTimeout
|
||||
);
|
||||
expect(discoverer._clusterInfo).toHaveBeenCalledWith(
|
||||
new GossipSeed({ host: '10.0.0.3', port: 2113 }),
|
||||
settings.gossipTimeout
|
||||
);
|
||||
});
|
||||
});
|
||||
});
|
||||
Loading…
Reference in New Issue
Block a user