运用Docker迅速构建Redis集群（dockerredis）

Recently, with the development of storage technology, more and more applications rely on distributed storage systems, especially key-value Nosql databases. Redis is a high-performance key-value database that is widely used in various areas. In order to improve its stability and scalability, we often choose Redis Cluster (Redis Cluster). This article will introduce how to quickly build Redis cluster with Docker technology.

First of all, we need to install Docker on the machine. Docker is a set of open source platform-level virtualization technology that allows developers to quickly and easily package, deploy, and manage applications on multiple operating systems. If you do not have docker installed, you can download docker from the official website and install it according to the instructions.

Then pull the redis image from the official repository:

`docker pull redis:latest`

Next, create a bridge network for redis. Because the redis cluster needs to communicate between containers, we create a bridge network to provide managed IP and port mapping for redis containers:

`docker network create redis-cluster`

Now you can start a container from the redis image. In order to make the redis instances run in cluster mode, we need to specify the \–cluster parameter when starting the container. For example, we want to start 2 containers, each containing the redis 6379 port, and execute:

`docker container run -d –net redis-cluster –name redis-node1 -p 6379:6379 redis:latest –cluster`

`docker container run -d –net redis-cluster –name redis-node2 -p 6379:6379 redis:latest –cluster`

After creating the container, we can create a cluster by executing the Redis Cluster Create command on node1:

`docker exec -it redis-node1 redis-cli –cluster create 172.19.0.2:6379 172.19.0.3:6379 –cluster-replicas 2`

(The network address can be obtained by the command `docker network inspect redis-cluster`)

After the redis cluster is successfully created, we can connect to any node to perform cluster related commands, for example:

`docker exec -it redis-node1 redis-cli –cluster info`

In this way, it is convenient and fast to build a redis cluster with docker technology. Through docker technology, it not only helps us quickly build Redis Cluster, but also provides more features, such as containers and clusters, to help optimize performance and scalability.