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How to build a redis-cluster in ubuntu 16.04/18.04

Posted in cluster, Linux, tagged , , , on ஜனவரி 13, 2023| Leave a Comment »

Required OS: Ubuntu 18.04 LTS

Target redis version: 3.0.6

1. Install required softwares and tools

sudo apt update

sudo apt install redis-server ruby redis-tools

Master Nodes: 

  • redis-master1 – 192.168.1.101
  • redis-master2 – 192.168.1.102
  • redis-master3 – 192.168.1.103

2. IP Address of the nodes

Slave Nodes

  • redis-slave1 – 192.168.1.104
  • redis-slave2 – 192.168.1.105
  • redis-slave3 – 192.168.1.106

3. To Create Redis Cluster (master-master-master) download following ruby tool ( so install redis library from gem repo)

wget https://github.com/seekasia/redis/raw/master/src/redis-trib-pass.rb

chmod +x redis-trib-pass.rb

sudo gem install redis -v 3.0.6

sudo ./redis-trib-pass.rb help

grep requirepass /etc/redis/redis.conf

requirepass mypassword

sudo ./redis-trib-pass.rb create –auth <cluter-password> MASTER1-IP:PortNo MASTER2-IP:PortNo …

sudo ./redis-trib-pass.rb create –auth mypassword 192.168.1.101:6379 192.168.1.102:6379 192.168.1.103:6379

4. Create slave for each master (master-slave):

In-order to create a master-slave cluster, you need to findout the master nodes ID, here is how to find

sudo redis-cli

auth mypassword

OK

> cluster nodes

note down the master-id and use it for master-slave creation

./redis-trib-pass.rb add-node –auth <cluster-password> –slave –master-id <master-node-uuid> SALVE-IP:PortNo MasterIP:PortNo

./redis-trib-pass.rb add-node –auth mypassword –slave –master-id 71d9ebaf2fb102959a3110a875800afb8472c747 192.168.1.104:6379 192.168.1.101:6379
./redis-trib-pass.rb add-node –auth mypassword –slave –master-id 53b90750c271adadb7934d36bb8e5f23fb3f4896 192.168.1.105:6379 192.168.1.102:6379
./redis-trib-pass.rb add-node –auth mypassword –slave –master-id d680676797c6c6bfae3a7d86e8a298e5fd9338c2 192.168.1.106:6379 192.168.1.103:6379

Here

71d9ebaf2fb102959a3110a875800afb8472c747 => redis-master1 ID

53b90750c271adadb7934d36bb8e5f23fb3f4896 => redis-master2 ID

d680676797c6c6bfae3a7d86e8a298e5fd9338c2 => redis-master3 ID

5. Verify cluster setup

sudo redis-cli

auth mypassword

OK

> cluster nodes

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