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Streaming: Refactor move database and redis logic into separate files (#31567)

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This commit is contained in:
Emelia Smith 2024-08-27 10:40:04 +02:00 committed by GitHub
parent a7f8417795
commit 4118688fba
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4 changed files with 219 additions and 195 deletions
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128
streaming/database.js Normal file
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@ -0,0 +1,128 @@
import pg from 'pg';
import pgConnectionString from 'pg-connection-string';
import { parseIntFromEnvValue } from './utils.js';
/**
* @param {NodeJS.ProcessEnv} env the `process.env` value to read configuration from
* @param {string} environment
* @returns {pg.PoolConfig} the configuration for the PostgreSQL connection
*/
export function configFromEnv(env, environment) {
/** @type {Record<string, pg.PoolConfig>} */
const pgConfigs = {
development: {
user: env.DB_USER || pg.defaults.user,
password: env.DB_PASS || pg.defaults.password,
database: env.DB_NAME || 'mastodon_development',
host: env.DB_HOST || pg.defaults.host,
port: parseIntFromEnvValue(env.DB_PORT, pg.defaults.port ?? 5432, 'DB_PORT')
},
production: {
user: env.DB_USER || 'mastodon',
password: env.DB_PASS || '',
database: env.DB_NAME || 'mastodon_production',
host: env.DB_HOST || 'localhost',
port: parseIntFromEnvValue(env.DB_PORT, 5432, 'DB_PORT')
},
};
/**
* @type {pg.PoolConfig}
*/
let baseConfig = {};
if (env.DATABASE_URL) {
const parsedUrl = pgConnectionString.parse(env.DATABASE_URL);
// The result of dbUrlToConfig from pg-connection-string is not type
// compatible with pg.PoolConfig, since parts of the connection URL may be
// `null` when pg.PoolConfig expects `undefined`, as such we have to
// manually create the baseConfig object from the properties of the
// parsedUrl.
//
// For more information see:
// https://github.com/brianc/node-postgres/issues/2280
//
// FIXME: clean up once brianc/node-postgres#3128 lands
if (typeof parsedUrl.password === 'string') baseConfig.password = parsedUrl.password;
if (typeof parsedUrl.host === 'string') baseConfig.host = parsedUrl.host;
if (typeof parsedUrl.user === 'string') baseConfig.user = parsedUrl.user;
if (typeof parsedUrl.port === 'string') {
const parsedPort = parseInt(parsedUrl.port, 10);
if (isNaN(parsedPort)) {
throw new Error('Invalid port specified in DATABASE_URL environment variable');
}
baseConfig.port = parsedPort;
}
if (typeof parsedUrl.database === 'string') baseConfig.database = parsedUrl.database;
if (typeof parsedUrl.options === 'string') baseConfig.options = parsedUrl.options;
// The pg-connection-string type definition isn't correct, as parsedUrl.ssl
// can absolutely be an Object, this is to work around these incorrect
// types, including the casting of parsedUrl.ssl to Record<string, any>
if (typeof parsedUrl.ssl === 'boolean') {
baseConfig.ssl = parsedUrl.ssl;
} else if (typeof parsedUrl.ssl === 'object' && !Array.isArray(parsedUrl.ssl) && parsedUrl.ssl !== null) {
/** @type {Record<string, any>} */
const sslOptions = parsedUrl.ssl;
baseConfig.ssl = {};
baseConfig.ssl.cert = sslOptions.cert;
baseConfig.ssl.key = sslOptions.key;
baseConfig.ssl.ca = sslOptions.ca;
baseConfig.ssl.rejectUnauthorized = sslOptions.rejectUnauthorized;
}
// Support overriding the database password in the connection URL
if (!baseConfig.password && env.DB_PASS) {
baseConfig.password = env.DB_PASS;
}
} else if (Object.hasOwn(pgConfigs, environment)) {
baseConfig = pgConfigs[environment];
if (env.DB_SSLMODE) {
switch(env.DB_SSLMODE) {
case 'disable':
case '':
baseConfig.ssl = false;
break;
case 'no-verify':
baseConfig.ssl = { rejectUnauthorized: false };
break;
default:
baseConfig.ssl = {};
break;
}
}
} else {
throw new Error('Unable to resolve postgresql database configuration.');
}
return {
...baseConfig,
max: parseIntFromEnvValue(env.DB_POOL, 10, 'DB_POOL'),
connectionTimeoutMillis: 15000,
// Deliberately set application_name to an empty string to prevent excessive
// CPU usage with PG Bouncer. See:
// - https://github.com/mastodon/mastodon/pull/23958
// - https://github.com/pgbouncer/pgbouncer/issues/349
application_name: '',
};
}
let pool;
/**
*
* @param {pg.PoolConfig} config
* @returns {pg.Pool}
*/
export function getPool(config) {
if (pool) {
return pool;
}
pool = new pg.Pool(config);
return pool;
}

201
streaming/index.js
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@ -8,15 +8,14 @@ import url from 'node:url';
import cors from 'cors';
import dotenv from 'dotenv';
import express from 'express';
import { Redis } from 'ioredis';
import { JSDOM } from 'jsdom';
import pg from 'pg';
import pgConnectionString from 'pg-connection-string';
import { WebSocketServer } from 'ws';
import * as Database from './database.js';
import { AuthenticationError, RequestError, extractStatusAndMessage as extractErrorStatusAndMessage } from './errors.js';
import { logger, httpLogger, initializeLogLevel, attachWebsocketHttpLogger, createWebsocketLogger } from './logging.js';
import { setupMetrics } from './metrics.js';
import * as Redis from './redis.js';
import { isTruthy, normalizeHashtag, firstParam } from './utils.js';
const environment = process.env.NODE_ENV || 'development';
@ -48,23 +47,6 @@ initializeLogLevel(process.env, environment);
* @property {string} deviceId
*/
/**
* @param {RedisConfiguration} config
* @returns {Promise<Redis>}
*/
const createRedisClient = async ({ redisParams, redisUrl }) => {
let client;
if (typeof redisUrl === 'string') {
client = new Redis(redisUrl, redisParams);
} else {
client = new Redis(redisParams);
}
client.on('error', (err) => logger.error({ err }, 'Redis Client Error!'));
return client;
};
/**
* Attempts to safely parse a string as JSON, used when both receiving a message
@ -97,177 +79,6 @@ const parseJSON = (json, req) => {
}
};
/**
* Takes an environment variable that should be an integer, attempts to parse
* it falling back to a default if not set, and handles errors parsing.
* @param {string|undefined} value
* @param {number} defaultValue
* @param {string} variableName
* @returns {number}
*/
const parseIntFromEnv = (value, defaultValue, variableName) => {
if (typeof value === 'string' && value.length > 0) {
const parsedValue = parseInt(value, 10);
if (isNaN(parsedValue)) {
throw new Error(`Invalid ${variableName} environment variable: ${value}`);
}
return parsedValue;
} else {
return defaultValue;
}
};
/**
* @param {NodeJS.ProcessEnv} env the `process.env` value to read configuration from
* @returns {pg.PoolConfig} the configuration for the PostgreSQL connection
*/
const pgConfigFromEnv = (env) => {
/** @type {Record<string, pg.PoolConfig>} */
const pgConfigs = {
development: {
user: env.DB_USER || pg.defaults.user,
password: env.DB_PASS || pg.defaults.password,
database: env.DB_NAME || 'mastodon_development',
host: env.DB_HOST || pg.defaults.host,
port: parseIntFromEnv(env.DB_PORT, pg.defaults.port ?? 5432, 'DB_PORT')
},
production: {
user: env.DB_USER || 'mastodon',
password: env.DB_PASS || '',
database: env.DB_NAME || 'mastodon_production',
host: env.DB_HOST || 'localhost',
port: parseIntFromEnv(env.DB_PORT, 5432, 'DB_PORT')
},
};
/**
* @type {pg.PoolConfig}
*/
let baseConfig = {};
if (env.DATABASE_URL) {
const parsedUrl = pgConnectionString.parse(env.DATABASE_URL);
// The result of dbUrlToConfig from pg-connection-string is not type
// compatible with pg.PoolConfig, since parts of the connection URL may be
// `null` when pg.PoolConfig expects `undefined`, as such we have to
// manually create the baseConfig object from the properties of the
// parsedUrl.
//
// For more information see:
// https://github.com/brianc/node-postgres/issues/2280
//
// FIXME: clean up once brianc/node-postgres#3128 lands
if (typeof parsedUrl.password === 'string') baseConfig.password = parsedUrl.password;
if (typeof parsedUrl.host === 'string') baseConfig.host = parsedUrl.host;
if (typeof parsedUrl.user === 'string') baseConfig.user = parsedUrl.user;
if (typeof parsedUrl.port === 'string') {
const parsedPort = parseInt(parsedUrl.port, 10);
if (isNaN(parsedPort)) {
throw new Error('Invalid port specified in DATABASE_URL environment variable');
}
baseConfig.port = parsedPort;
}
if (typeof parsedUrl.database === 'string') baseConfig.database = parsedUrl.database;
if (typeof parsedUrl.options === 'string') baseConfig.options = parsedUrl.options;
// The pg-connection-string type definition isn't correct, as parsedUrl.ssl
// can absolutely be an Object, this is to work around these incorrect
// types, including the casting of parsedUrl.ssl to Record<string, any>
if (typeof parsedUrl.ssl === 'boolean') {
baseConfig.ssl = parsedUrl.ssl;
} else if (typeof parsedUrl.ssl === 'object' && !Array.isArray(parsedUrl.ssl) && parsedUrl.ssl !== null) {
/** @type {Record<string, any>} */
const sslOptions = parsedUrl.ssl;
baseConfig.ssl = {};
baseConfig.ssl.cert = sslOptions.cert;
baseConfig.ssl.key = sslOptions.key;
baseConfig.ssl.ca = sslOptions.ca;
baseConfig.ssl.rejectUnauthorized = sslOptions.rejectUnauthorized;
}
// Support overriding the database password in the connection URL
if (!baseConfig.password && env.DB_PASS) {
baseConfig.password = env.DB_PASS;
}
} else if (Object.hasOwn(pgConfigs, environment)) {
baseConfig = pgConfigs[environment];
if (env.DB_SSLMODE) {
switch(env.DB_SSLMODE) {
case 'disable':
case '':
baseConfig.ssl = false;
break;
case 'no-verify':
baseConfig.ssl = { rejectUnauthorized: false };
break;
default:
baseConfig.ssl = {};
break;
}
}
} else {
throw new Error('Unable to resolve postgresql database configuration.');
}
return {
...baseConfig,
max: parseIntFromEnv(env.DB_POOL, 10, 'DB_POOL'),
connectionTimeoutMillis: 15000,
// Deliberately set application_name to an empty string to prevent excessive
// CPU usage with PG Bouncer. See:
// - https://github.com/mastodon/mastodon/pull/23958
// - https://github.com/pgbouncer/pgbouncer/issues/349
application_name: '',
};
};
/**
* @typedef RedisConfiguration
* @property {import('ioredis').RedisOptions} redisParams
* @property {string} redisPrefix
* @property {string|undefined} redisUrl
*/
/**
* @param {NodeJS.ProcessEnv} env the `process.env` value to read configuration from
* @returns {RedisConfiguration} configuration for the Redis connection
*/
const redisConfigFromEnv = (env) => {
// ioredis *can* transparently add prefixes for us, but it doesn't *in some cases*,
// which means we can't use it. But this is something that should be looked into.
const redisPrefix = env.REDIS_NAMESPACE ? `${env.REDIS_NAMESPACE}:` : '';
let redisPort = parseIntFromEnv(env.REDIS_PORT, 6379, 'REDIS_PORT');
let redisDatabase = parseIntFromEnv(env.REDIS_DB, 0, 'REDIS_DB');
/** @type {import('ioredis').RedisOptions} */
const redisParams = {
host: env.REDIS_HOST || '127.0.0.1',
port: redisPort,
// Force support for both IPv6 and IPv4, by default ioredis sets this to 4,
// only allowing IPv4 connections:
// https://github.com/redis/ioredis/issues/1576
family: 0,
db: redisDatabase,
password: env.REDIS_PASSWORD || undefined,
};
// redisParams.path takes precedence over host and port.
if (env.REDIS_URL && env.REDIS_URL.startsWith('unix://')) {
redisParams.path = env.REDIS_URL.slice(7);
}
return {
redisParams,
redisPrefix,
redisUrl: typeof env.REDIS_URL === 'string' ? env.REDIS_URL : undefined,
};
};
const PUBLIC_CHANNELS = [
'public',
'public:media',
@ -291,10 +102,12 @@ const CHANNEL_NAMES = [
];
const startServer = async () => {
const pgPool = new pg.Pool(pgConfigFromEnv(process.env));
const pgPool = Database.getPool(Database.configFromEnv(process.env, environment));
const metrics = setupMetrics(CHANNEL_NAMES, pgPool);
const redisConfig = Redis.configFromEnv(process.env);
const redisClient = Redis.createClient(redisConfig, logger);
const server = http.createServer();
const wss = new WebSocketServer({ noServer: true });
@ -386,9 +199,7 @@ const startServer = async () => {
*/
const subs = {};
const redisConfig = redisConfigFromEnv(process.env);
const redisSubscribeClient = await createRedisClient(redisConfig);
const redisClient = await createRedisClient(redisConfig);
const redisSubscribeClient = Redis.createClient(redisConfig, logger);
const { redisPrefix } = redisConfig;
// When checking metrics in the browser, the favicon is requested this

65
streaming/redis.js Normal file
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@ -0,0 +1,65 @@
import { Redis } from 'ioredis';
import { parseIntFromEnvValue } from './utils.js';
/**
* @typedef RedisConfiguration
* @property {import('ioredis').RedisOptions} redisParams
* @property {string} redisPrefix
* @property {string|undefined} redisUrl
*/
/**
* @param {NodeJS.ProcessEnv} env the `process.env` value to read configuration from
* @returns {RedisConfiguration} configuration for the Redis connection
*/
export function configFromEnv(env) {
// ioredis *can* transparently add prefixes for us, but it doesn't *in some cases*,
// which means we can't use it. But this is something that should be looked into.
const redisPrefix = env.REDIS_NAMESPACE ? `${env.REDIS_NAMESPACE}:` : '';
let redisPort = parseIntFromEnvValue(env.REDIS_PORT, 6379, 'REDIS_PORT');
let redisDatabase = parseIntFromEnvValue(env.REDIS_DB, 0, 'REDIS_DB');
/** @type {import('ioredis').RedisOptions} */
const redisParams = {
host: env.REDIS_HOST || '127.0.0.1',
port: redisPort,
// Force support for both IPv6 and IPv4, by default ioredis sets this to 4,
// only allowing IPv4 connections:
// https://github.com/redis/ioredis/issues/1576
family: 0,
db: redisDatabase,
password: env.REDIS_PASSWORD || undefined,
};
// redisParams.path takes precedence over host and port.
if (env.REDIS_URL && env.REDIS_URL.startsWith('unix://')) {
redisParams.path = env.REDIS_URL.slice(7);
}
return {
redisParams,
redisPrefix,
redisUrl: typeof env.REDIS_URL === 'string' ? env.REDIS_URL : undefined,
};
}
/**
* @param {RedisConfiguration} config
* @param {import('pino').Logger} logger
* @returns {Redis}
*/
export function createClient({ redisParams, redisUrl }, logger) {
let client;
if (typeof redisUrl === 'string') {
client = new Redis(redisUrl, redisParams);
} else {
client = new Redis(redisParams);
}
client.on('error', (err) => logger.error({ err }, 'Redis Client Error!'));
return client;
}

20
streaming/utils.js
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@ -59,3 +59,23 @@ export function firstParam(arrayOrString) {
return arrayOrString;
}
}
/**
* Takes an environment variable that should be an integer, attempts to parse
* it falling back to a default if not set, and handles errors parsing.
* @param {string|undefined} value
* @param {number} defaultValue
* @param {string} variableName
* @returns {number}
*/
export function parseIntFromEnvValue(value, defaultValue, variableName) {
if (typeof value === 'string' && value.length > 0) {
const parsedValue = parseInt(value, 10);
if (isNaN(parsedValue)) {
throw new Error(`Invalid ${variableName} environment variable: ${value}`);
}
return parsedValue;
} else {
return defaultValue;
}
}