65 lines
1.9 KiB
JavaScript
65 lines
1.9 KiB
JavaScript
import { Redis } from 'ioredis';
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import { parseIntFromEnvValue } from './utils.js';
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/**
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* @typedef RedisConfiguration
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* @property {import('ioredis').RedisOptions} redisParams
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* @property {string} redisPrefix
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* @property {string|undefined} redisUrl
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*/
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/**
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* @param {NodeJS.ProcessEnv} env the `process.env` value to read configuration from
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* @returns {RedisConfiguration} configuration for the Redis connection
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*/
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export function configFromEnv(env) {
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// ioredis *can* transparently add prefixes for us, but it doesn't *in some cases*,
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// which means we can't use it. But this is something that should be looked into.
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const redisPrefix = env.REDIS_NAMESPACE ? `${env.REDIS_NAMESPACE}:` : '';
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let redisPort = parseIntFromEnvValue(env.REDIS_PORT, 6379, 'REDIS_PORT');
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let redisDatabase = parseIntFromEnvValue(env.REDIS_DB, 0, 'REDIS_DB');
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/** @type {import('ioredis').RedisOptions} */
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const redisParams = {
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host: env.REDIS_HOST || '127.0.0.1',
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port: redisPort,
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// Force support for both IPv6 and IPv4, by default ioredis sets this to 4,
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// only allowing IPv4 connections:
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// https://github.com/redis/ioredis/issues/1576
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family: 0,
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db: redisDatabase,
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password: env.REDIS_PASSWORD || undefined,
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};
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// redisParams.path takes precedence over host and port.
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if (env.REDIS_URL && env.REDIS_URL.startsWith('unix://')) {
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redisParams.path = env.REDIS_URL.slice(7);
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}
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return {
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redisParams,
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redisPrefix,
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redisUrl: typeof env.REDIS_URL === 'string' ? env.REDIS_URL : undefined,
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};
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}
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/**
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* @param {RedisConfiguration} config
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* @param {import('pino').Logger} logger
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* @returns {Redis}
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*/
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export function createClient({ redisParams, redisUrl }, logger) {
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let client;
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if (typeof redisUrl === 'string') {
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client = new Redis(redisUrl, redisParams);
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} else {
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client = new Redis(redisParams);
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}
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client.on('error', (err) => logger.error({ err }, 'Redis Client Error!'));
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return client;
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}
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