jay-johnson / Docker Redis Cluster
Running a distributed 6-node Redis Cluster with Docker Swarm, Docker Compose, and Supervisor
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A Distributed Redis Cluster using Docker Swarm, Docker Compose, and Supervisor
Overview
This repository will start a distributed 6-node Redis Cluster using Docker Swarm with Docker Compose and Supervisor for high availability. The redis instances listen on the host node ports: 6379-6384. There are 3 master nodes and 3 replica nodes. If you are running a local Docker Swarm you can run the entire 6-node cluster locally.
How to Install
- Make sure Swarm is installed
docker-redis-cluster $ sudo ./1_install_core.sh
- Restart the local consul, docker daemon, swarm manager, and swarm join
docker-redis-cluster $ sudo ./boot_local_docker_services.sh
- Point to the Docker Swarm
Please set the terminal environment to use the running Docker Swarm
$ export DOCKER_HOST=localhost:4000
$ env | grep DOCKER
DOCKER_HOST=localhost:4000
$
- Confirm the Docker Swarm Membership
Running the swarm locally you should see only 1 node with something similar:
$ docker info
Containers: 0
Images: 0
Role: primary
Strategy: spread
Filters: health, port, dependency, affinity, constraint
Nodes: 1
localhost.localdomain: localhost:2375
└ Containers: 0
└ Reserved CPUs: 0 / 2
└ Reserved Memory: 0 B / 4.053 GiB
└ Labels: executiondriver=native-0.2, kernelversion=4.1.7-200.fc22.x86_64, operatingsystem=Fedora 22 (Twenty Two), storagedriver=devicemapper
CPUs: 2
Total Memory: 4.053 GiB
Name: localhost.localdomain
$
Start the Redis Cluster
Assuming consul, docker daemon, swarm manager, and swarm join are running with something similar to:
$ ps auwwx | grep consul | grep -v grep
root 29447 0.4 0.4 34110388 19204 pts/4 Sl 19:39 0:14 consul agent -server -data-dir=/tmp/consul -bind=0.0.0.0 -bootstrap-expect 1
root 31650 12.9 1.2 1329604 51208 pts/4 Sl 20:00 3:42 /usr/local/bin/docker daemon -H localhost:2375 --cluster-advertise 0.0.0.0:2375 --cluster-store consul://localhost:8500/developmentswarm
root 31738 0.0 0.5 488084 20512 pts/1 Sl 20:02 0:01 /usr/local/bin/swarm manage -H tcp://localhost:4000 --advertise localhost:4000 consul://localhost:8500/developmentswarm
root 31749 0.0 0.3 128416 14304 pts/1 Sl 20:02 0:00 /usr/local/bin/swarm join --addr=localhost:2375 consul://localhost:8500/developmentswarm
$
- Make sure no other Redis nodes are running
$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
$
- Start the Redis Cluster
docker-redis-cluster $ ./start_cluster.sh
Starting the Cluster on Docker Swarm
Creating redismaster1
Creating redismaster3
Creating redismaster2
Creating redisreplica1
Creating redisreplica2
Creating redisreplica3
Done
docker-redis-cluster $
- Confirm the Containers are running
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
89f8ab731348 jayjohnson/redis-clusterable "/bin/sh -c '. /bin/s" 4 minutes ago Up 4 minutes 127.0.0.1:6384->6379/tcp, 127.0.0.1:16384->16379/tcp, 127.0.0.1:26384->26379/tcp localhost.localdomain/redisreplica3
6ff759f42bb6 jayjohnson/redis-clusterable "/bin/sh -c '. /bin/s" 4 minutes ago Up 4 minutes 127.0.0.1:6383->6379/tcp, 127.0.0.1:16383->16379/tcp, 127.0.0.1:26383->26379/tcp localhost.localdomain/redisreplica2
fe97da8b920a jayjohnson/redis-clusterable "/bin/sh -c '. /bin/s" 4 minutes ago Up 4 minutes 127.0.0.1:6382->6379/tcp, 127.0.0.1:16382->16379/tcp, 127.0.0.1:26382->26379/tcp localhost.localdomain/redisreplica1
8ed2a60663f6 jayjohnson/redis-clusterable "/bin/sh -c '. /bin/s" 4 minutes ago Up 4 minutes 127.0.0.1:6380->6379/tcp, 127.0.0.1:16380->16379/tcp, 127.0.0.1:26380->26379/tcp localhost.localdomain/redismaster2
3a779ae52bd7 jayjohnson/redis-clusterable "/bin/sh -c '. /bin/s" 4 minutes ago Up 4 minutes 127.0.0.1:6381->6379/tcp, 127.0.0.1:16381->16379/tcp, 127.0.0.1:26381->26379/tcp localhost.localdomain/redismaster3
085b750909d5 jayjohnson/redis-clusterable "/bin/sh -c '. /bin/s" 4 minutes ago Up 4 minutes 127.0.0.1:6379->6379/tcp, 127.0.0.1:16379->16379/tcp, 127.0.0.1:26379->26379/tcp localhost.localdomain/redismaster1
$
Confirm the Redis Cluster using the Command Line Tool
$ redis-cli -h 127.0.0.1 -p 6384 cluster nodes
aa81e0dc13f4985dd0b70647d338f899454326af :6379 myself,master - 0 0 6 connected
$
Inspect the Redis Cluster Details
$ ./cst.sh
Printing Redis Cluster Status:
redismaster1(6379):
399de28f4b010ae4395db704887bfdea92aa2144 :6379 myself,master - 0 0 1 connected 0-5460
redismaster2(6380):
1c62661d9235463b5f3906a687ddc4010444f4ac :6379 myself,master - 0 0 2 connected 5461-10922
redismaster3(6381):
6fc1dda1fec41b4fbb0654d926dbfe17700c412b :6379 myself,master - 0 0 3 connected 10923-16383
redisreplica1(6382):
fffa24ec3a9d8485e63bf4e0d09bb2428ca7851b :6379 myself,master - 0 0 4 connected
redisreplica2(6383):
bb6844f7b7a3ccc1c0bc392461d342037916b903 :6379 myself,master - 0 0 5 connected
redisreplica3(6384):
c05e9a770e8aa11d82793f2d1076b7a94334d83c :6379 myself,master - 0 0 6 connected
Done
$
Stop the Redis Cluster
$ ./stop_cluster.sh
Stopping the Cluster on Docker Swarm
Stopping redisreplica3 ... done
Stopping redisreplica2 ... done
Stopping redisreplica1 ... done
Stopping redismaster2 ... done
Stopping redismaster3 ... done
Stopping redismaster1 ... done
Cleaning up old containers for ports
Done
$
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