Use redis-cli to create a Redis Cluster on Docker (with Redis 5.0)

create-redis-cluster.sh

#------------ bootstrap the cluster nodes --------------------

start_cmd='redis-server --port 6379 --cluster-enabled yes --cluster-config-file nodes.conf --cluster-node-timeout 5000 --appendonly yes'
redis_image='redis:5.0-rc'
network_name='redis_cluster_net'

docker network create $network_name
echo $network_name " created"

#---------- create the cluster ------------------------

for port in `seq 6379 6384`; do \
 docker run -d --name "redis-"$port -p $port:6379 --net $network_name $redis_image $start_cmd;
 echo "created redis cluster node redis-"$port
done

cluster_hosts=''

for port in `seq 6379 6384`; do \
 hostip=`docker inspect -f '{{(index .NetworkSettings.Networks "redis_cluster_net").IPAddress}}' "redis-"$port`;
 echo "IP for cluster node redis-"$port "is" $hostip
 cluster_hosts="$cluster_hosts$hostip:6379 ";
done

echo "cluster hosts "$cluster_hosts
echo "creating cluster...."
echo 'yes' | docker run -i --rm --net $network_name $redis_image redis-cli --cluster create $cluster_hosts --cluster-replicas 1;

Can NOT connect through cluster mode. Refer to the network limit: https://redis.io/topics/cluster-tutorial, a redis cluster in docker must be in host network.

Agree on @shinyzhu , I've read , but I've seen many blog post for dockerizing redis cluster

Works for me. Thank you @abhirockzz, helpful gist I will try to update it to latest Redis and use for Redis Gears deployment.

this works for me. Thank you for sharing this helpful gist.

From the "Horse's mouth", an extract from the self-documented Redis.conf file version 6.0 and above.

# In certain deployments, Redis Cluster nodes address discovery fails, because
# addresses are NAT-ted or because ports are forwarded (the typical case is
# Docker and other containers).
#
# In order to make Redis Cluster working in such environments, a static
# configuration where each node knows its public address is needed. The
# following two options are used for this scope, and are:
#
# * cluster-announce-ip
# * cluster-announce-port
# * cluster-announce-bus-port
#
# Each instructs the node about its address, client port, and cluster message
# bus port. The information is then published in the header of the bus packets
# so that other nodes will be able to correctly map the address of the node
# publishing the information.
#
# If the above options are not used, the normal Redis Cluster auto-detection
# will be used instead.
#
# Note that when remapped, the bus port may not be at the fixed offset of
# clients port + 10000, so you can specify any port and bus-port depending
# on how they get remapped. If the bus-port is not set, a fixed offset of
# 10000 will be used as usual.
#
# Example:
#
# cluster-announce-ip 10.1.1.5
# cluster-announce-port 6379
# cluster-announce-bus-port 6380

Docker compose and docker Redis cluster launch script