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.
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3 Answers
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
3 Comments
Tam Nguyen
Hi, I'm able to create a Redis Cluster within Docker with Bitnami Image. I would like to connect to a cluster from my Spring Boot project via IntelliJ, is it possible to do such a thing? I'm using a Windows machine. Thanks in advance.
akauppi
I think the comment "will only start after the master has booted completely" is misleading. In Docker Compose, the dependency only means that the depended-upon service gets started, but there's no wait or health check involved.
sattu
@NguyễnĐứcTâm were you able to connect to a cluster from spring project via Intellij? I am trying to figure out the same.
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.
3 Comments
Anshuman Bardhan
$ docker-compose up --detach --scale redis-master=1 --scale redis-secondary=3 command only creates 1 slave node, tried increasing the secondary nodes but no success, 1. can you provide me a command to check or verify if they are connected? 2.Executing the above command changes the port number everytime
Adiii
in scaling you can not use the static port, if you want just add
ports: - '6379:6379' in masterAnshuman Bardhan
the containers are created but automatically it goes down... 08:01:46.50 INFO ==> ** Starting Redis setup ** 08:01:46.62 INFO ==> Initializing Redis... mkdir: cannot create directory '/bitnami/redis': Permission denied Tried giving permissions but no luck
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
