Configure backend database as redis cluster

services/document-updater/.gitignore

@@ -46,3 +46,8 @@ test/acceptance/js/*
 forever/
 
 **.swp
+
+# Redis cluster
+**/appendonly.aof
+**/dump.rdb
+**/nodes.conf

services/document-updater/app/coffee/RedisBackend.coffee

@@ -1,5 +1,4 @@
 Settings = require "settings-sharelatex"
-redis = require("redis-sharelatex")
 async = require "async"
 
 class Client
@@ -78,7 +77,12 @@ module.exports =
 			client_configs.primary = true
 			client_configs = [client_configs]
 		clients = client_configs.map (config) ->
-			rclient: redis.createClient(config)
+			if config.cluster?
+				Redis = require("ioredis")
+				rclient = new Redis.Cluster(config.cluster)
+			else
+				rclient = require("redis-sharelatex").createClient(config)
+			rclient: rclient
 			key_schema: config.key_schema
 			primary: config.primary
 		return new Client(clients)

services/document-updater/config/settings.defaults.coffee

@@ -34,9 +34,10 @@ module.exports =
 				pendingUpdates: ({doc_id}) -> "PendingUpdates:#{doc_id}"
 				docsInProject: ({project_id}) -> "DocsIn:#{project_id}"
 		}, {
-			port: "6380"
-			host: "localhost"
-			password:""
+			cluster: [{
+				port: "7000"
+				host: "localhost"
+			}]
 			key_schema:
 				blockingKey: ({doc_id}) -> "Blocking:{#{doc_id}}"
 				docLines: ({doc_id}) -> "doclines:{#{doc_id}}"

services/document-updater/package.json

@@ -10,6 +10,7 @@
     "async": "^2.0.0-rc.5",
     "coffee-script": "1.4.0",
     "express": "3.3.4",
+    "ioredis": "^2.0.1",
     "logger-sharelatex": "git+https://github.com/sharelatex/logger-sharelatex.git#v1.0.0",
     "lynx": "0.0.11",
     "metrics-sharelatex": "git+https://github.com/sharelatex/metrics-sharelatex.git#v1.0.0",

services/document-updater/redis_cluster/7000/redis.conf

@@ -0,0 +1,5 @@
+port 7000
+cluster-enabled yes
+cluster-config-file nodes.conf
+cluster-node-timeout 5000
+appendonly yes

services/document-updater/redis_cluster/7001/redis.conf

@@ -0,0 +1,5 @@
+port 7001
+cluster-enabled yes
+cluster-config-file nodes.conf
+cluster-node-timeout 5000
+appendonly yes

services/document-updater/redis_cluster/7002/redis.conf

@@ -0,0 +1,5 @@
+port 7002
+cluster-enabled yes
+cluster-config-file nodes.conf
+cluster-node-timeout 5000
+appendonly yes

services/document-updater/redis_cluster/7003/redis.conf

@@ -0,0 +1,5 @@
+port 7003
+cluster-enabled yes
+cluster-config-file nodes.conf
+cluster-node-timeout 5000
+appendonly yes

services/document-updater/redis_cluster/7004/redis.conf

@@ -0,0 +1,5 @@
+port 7004
+cluster-enabled yes
+cluster-config-file nodes.conf
+cluster-node-timeout 5000
+appendonly yes

services/document-updater/redis_cluster/7005/redis.conf

@@ -0,0 +1,5 @@
+port 7005
+cluster-enabled yes
+cluster-config-file nodes.conf
+cluster-node-timeout 5000
+appendonly yes

services/document-updater/redis_cluster/redis-cluster.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+(cd 7000 && redis-server redis.conf) &
+PID1="$!"
+
+(cd 7001 && redis-server redis.conf) &
+PID2="$!"
+
+(cd 7002 && redis-server redis.conf) &
+PID3="$!"
+
+(cd 7003 && redis-server redis.conf) &
+PID4="$!"
+
+(cd 7004 && redis-server redis.conf) &
+PID5="$!"
+
+(cd 7005 && redis-server redis.conf) &
+PID6="$!"
+
+trap "kill $PID1 $PID2 $PID3 $PID4 $PID5 $PID6" exit INT TERM
+
+wait