How to create redis-cluster in docker based environment - docker

Question

I want to create Redis cluster in my docker based environment, Any docker base image that supports replication and allow me to create cluster using docker-compose would be helpful.

Answer 1

Here is my working .yml file
version: '3.7'
services:
fix-redis-volume-ownership: # This service is to authorise redis-master with ownership permissions
image: 'bitnami/redis:latest'
user: root
command: chown -R 1001:1001 /bitnami
volumes:
- ./data/redis:/bitnami
- ./data/redis/conf/redis.conf:/opt/bitnami/redis/conf/redis.conf
redis-master: # Setting up master node
image: 'bitnami/redis:latest'
ports:
- '6329:6379' # Port 6329 will be exposed to handle connections from outside server
environment:
- REDIS_REPLICATION_MODE=master # Assigning the node as a master
- ALLOW_EMPTY_PASSWORD=yes # No password authentication required/ provide password if needed
volumes:
- ./data/redis:/bitnami # Redis master data volume
- ./data/redis/conf/redis.conf:/opt/bitnami/redis/conf/redis.conf # Redis master configuration volume
redis-replica: # Setting up slave node
image: 'bitnami/redis:latest'
ports:
- '6379' # No port is exposed
depends_on:
- redis-master # will only start after the master has booted completely
environment:
- REDIS_REPLICATION_MODE=slave # Assigning the node as slave
- REDIS_MASTER_HOST=redis-master # Host for the slave node is the redis-master node
- REDIS_MASTER_PORT_NUMBER=6379 # Port number for local
- ALLOW_EMPTY_PASSWORD=yes # No password required to connect to node

Answer 2

You can use bitnami-docker-redis.
With Docker Compose the master/replica mode can be setup using:
version: '2'
services:
redis-master:
image: 'bitnami/redis:latest'
ports:
- '6379'
environment:
- REDIS_REPLICATION_MODE=master
- REDIS_PASSWORD=my_master_password
volumes:
- '/path/to/redis-persistence:/bitnami'
redis-replica:
image: 'bitnami/redis:latest'
ports:
- '6379'
depends_on:
- redis-master
environment:
- REDIS_REPLICATION_MODE=slave
- REDIS_MASTER_HOST=redis-master
- REDIS_MASTER_PORT_NUMBER=6379
- REDIS_MASTER_PASSWORD=my_master_password
- REDIS_PASSWORD=my_replica_password
Scale the number of replicas using:
$ docker-compose up --detach --scale redis-master=1 --scale redis-secondary=3
The above command scales up the number of replicas to 3. You can scale
down in the same way.
Note: You should not scale up/down the number of master nodes. Always
have only one master node running.
bitnami-docker-redis-cluster

Answer 3

you can use this to create replica with master and slave node
version: '3'
services:
redis:
image: redis:5.0.0
container_name: master
ports:
- "6379:6379"
networks:
- redis-replication
redis-slave:
image: redis:5.0.0
container_name: slave
ports:
- "6380:6379"
command: redis-server --slaveof master 6379
depends_on:
- redis
networks:
- redis-replication
networks:
redis-replication:
driver: bridge
or you can use this with redislabs/redismod:
redis:
image: redislabs/redismod:latest
ports:
- "6329:6329"
command:
[
"--loadmodule",
"/usr/lib/redis/modules/redisai.so",
"--loadmodule",
"/usr/lib/redis/modules/redisearch.so",
"--loadmodule",
"/usr/lib/redis/modules/redisgraph.so",
"--loadmodule",
"/usr/lib/redis/modules/redistimeseries.so",
"--loadmodule",
"/usr/lib/redis/modules/rejson.so",
"--loadmodule",
"/usr/lib/redis/modules/redisbloom.so",
"--loadmodule",
"/usr/lib/redis/modules/redisgears.so",
"Plugin",
"/var/opt/redislabs/modules/rg/plugin/gears_python.so",
--port 6329,
]
redis-slave:
image: redislabs/redismod:latest
ports:
- "6380:6379"
command:
[
"--loadmodule",
"/usr/lib/redis/modules/redisai.so",
"--loadmodule",
"/usr/lib/redis/modules/redisearch.so",
"--loadmodule",
"/usr/lib/redis/modules/redisgraph.so",
"--loadmodule",
"/usr/lib/redis/modules/redistimeseries.so",
"--loadmodule",
"/usr/lib/redis/modules/rejson.so",
"--loadmodule",
"/usr/lib/redis/modules/redisbloom.so",
"--loadmodule",
"/usr/lib/redis/modules/redisgears.so",
"Plugin",
"/var/opt/redislabs/modules/rg/plugin/gears_python.so",
--REPLICAOF redis 6329,
]
depends_on:
- redis