perf: Reuse redis connections where possible (#1157)

* reuse redis connections where possible

* redis -> ioredis

package.json

@@ -95,6 +95,7 @@
     "immutable": "^3.8.2",
     "imports-loader": "0.6.5",
     "invariant": "^2.2.2",
+    "ioredis": "^4.14.1",
     "isomorphic-fetch": "2.2.1",
     "js-search": "^1.4.2",
     "json-loader": "0.5.4",
@@ -138,7 +139,6 @@
     "react-portal": "^4.0.0",
     "react-router-dom": "^5.1.2",
     "react-waypoint": "^9.0.2",
-    "redis": "^2.6.2",
     "rich-markdown-editor": "^9.11.1",
     "sequelize": "^5.21.1",
     "sequelize-cli": "^5.5.0",

server/events.js

@@ -1,5 +1,5 @@
 // @flow
-import Queue from 'bull';
+import { createQueue } from './utils/queue';
 import services from './services';
 
 export type UserEvent =
@@ -93,8 +93,8 @@ export type Event =
   | CollectionEvent
   | IntegrationEvent;
 
-const globalEventsQueue = new Queue('global events', process.env.REDIS_URL);
+const globalEventsQueue = createQueue('global events');
-const serviceEventsQueue = new Queue('service events', process.env.REDIS_URL);
+const serviceEventsQueue = createQueue('service events');
 
 // this queue processes global events and hands them off to service hooks
 globalEventsQueue.process(async job => {

server/index.js

@@ -1,17 +1,14 @@
 // @flow
-import { promisify } from 'util';
 import http from 'http';
 import IO from 'socket.io';
 import SocketAuth from 'socketio-auth';
 import socketRedisAdapter from 'socket.io-redis';
 import { getUserForJWT } from './utils/jwt';
 import { Document, Collection, View } from './models';
-import { client } from './redis';
+import { client, subscriber } from './redis';
 import app from './app';
 import policy from './policies';
 
-const redisHget = promisify(client.hget).bind(client);
-const redisHset = promisify(client.hset).bind(client);
 const server = http.createServer(app.callback());
 let io;
 
@@ -24,7 +21,12 @@ if (process.env.WEBSOCKETS_ENABLED === 'true') {
     cookie: false,
   });
 
-  io.adapter(socketRedisAdapter(process.env.REDIS_URL));
+  io.adapter(
+    socketRedisAdapter({
+      pubClient: client,
+      subClient: subscriber,
+    })
+  );
 
   SocketAuth(io, {
     authenticate: async (socket, data, callback) => {
@@ -36,7 +38,7 @@ if (process.env.WEBSOCKETS_ENABLED === 'true') {
 
         // store the mapping between socket id and user id in redis
         // so that it is accessible across multiple server nodes
-        await redisHset(socket.id, 'userId', user.id);
+        await client.hset(socket.id, 'userId', user.id);
 
         return callback(null, true);
       } catch (err) {
@@ -107,7 +109,7 @@ if (process.env.WEBSOCKETS_ENABLED === 'true') {
                 // makes this easy.
                 let userIds = new Map();
                 for (const socketId of sockets) {
-                  const userId = await redisHget(socketId, 'userId');
+                  const userId = await client.hget(socketId, 'userId');
                   userIds.set(userId, userId);
                 }
                 socket.emit('document.presence', {

server/logistics.js

@@ -1,12 +1,12 @@
 // @flow
-import Queue from 'bull';
 import debug from 'debug';
 import mailer from './mailer';
 import { Collection, Team } from './models';
 import { archiveCollections } from './utils/zip';
+import { createQueue } from './utils/queue';
 
 const log = debug('logistics');
-const logisticsQueue = new Queue('logistics', process.env.REDIS_URL);
+const logisticsQueue = createQueue('logistics');
 const queueOptions = {
   attempts: 2,
   removeOnComplete: true,

server/mailer.js

@@ -4,7 +4,7 @@ import debug from 'debug';
 import bugsnag from 'bugsnag';
 import nodemailer from 'nodemailer';
 import Oy from 'oy-vey';
-import Queue from 'bull';
+import { createQueue } from './utils/queue';
 import { baseStyles } from './emails/components/EmailLayout';
 import { WelcomeEmail, welcomeEmailText } from './emails/WelcomeEmail';
 import { ExportEmail, exportEmailText } from './emails/ExportEmail';
@@ -182,7 +182,7 @@ export class Mailer {
 const mailer = new Mailer();
 export default mailer;
 
-export const mailerQueue = new Queue('email', process.env.REDIS_URL);
+export const mailerQueue = createQueue('email');
 
 mailerQueue.process(async (job: EmailJob) => {
   // $FlowIssue flow doesn't like dynamic values

server/redis.js

@@ -1,6 +1,7 @@
 // @flow
-import redis from 'redis';
+import Redis from 'ioredis';
 
-const client = redis.createClient(process.env.REDIS_URL);
+const client = new Redis(process.env.REDIS_URL);
+const subscriber = new Redis(process.env.REDIS_URL);
 
-export { client };
+export { client, subscriber };

server/utils/queue.js

@@ -0,0 +1,19 @@
+// @flow
+import Redis from 'ioredis';
+import Queue from 'bull';
+import { client, subscriber } from '../redis';
+
+export function createQueue(name: string) {
+  return new Queue(name, {
+    createClient(type) {
+      switch (type) {
+        case 'client':
+          return client;
+        case 'subscriber':
+          return subscriber;
+        default:
+          return new Redis(process.env.REDIS_URL);
+      }
+    },
+  });
+}

yarn.lock

@@ -8181,7 +8181,7 @@ redis-parser@^3.0.0:
   dependencies:
     redis-errors "^1.0.0"
 
-redis@^2.6.2, redis@~2.8.0:
+redis@~2.8.0:
   version "2.8.0"
   resolved "https://registry.yarnpkg.com/redis/-/redis-2.8.0.tgz#202288e3f58c49f6079d97af7a10e1303ae14b02"
   integrity sha512-M1OkonEQwtRmZv4tEWF2VgpG0JWJ8Fv1PhlgT5+B+uNq2cA3Rt1Yt/ryoR+vQNOQcIEgdCdfH0jr3bDpihAw1A==