20210304. 0.3. Redis Cluster 搭建 - 拉勾教育

要求

  • 要求三主三从
  • 扩容
  • 缩容

环境信息

  • Redis 版本:6.0.10
  • 虚拟机操作系统:CentOS 7

集群信息

安装目录

/redis
|--cluster
|--|--7001 - 7008

主从信息

奇数为主,偶数为从

  • 7001 - 7002
  • 7003 - 7004
  • 7005 - 7006
  • 7007 - 7008

操作步骤

安装集群

  1. 新建安装文件夹,解压安装包

    mkdir /redis/cluster -p
    cd /redis/cluster/
    mkdir 7001
    
    cd /redis
    tar -xzvf redis-6.0.10.tar.gz
    
  2. 升级 GCC 版本

    # 查看gcc版本是否在5.3以上,centos7.6默认安装4.8.5
    gcc -v
    # 升级gcc到5.3及以上,如下:
    # 升级到gcc 9.3:
    yum -y install centos-release-scl
    yum -y install devtoolset-9-gcc devtoolset-9-gcc-c++ devtoolset-9-binutils
    scl enable devtoolset-9 bash
    
  3. 安装 Redis

    cd /redis/redis-6.0.10
    make
    make install PREFIX=/redis/cluster/7001
    cp /redis/redis-6.0.10/redis.conf /redis/cluster/7001/bin/
    
  4. 修改 redis.conf 配置文件

    # bind 127.0.0.1
    protected-mode no
    port 7001
    daemonize yes
    cluster-enabled yes
    cluster-config-file nodes-7001.conf
    pidfile /var/run/redis_7001.pid
    dir /redis/cluster/7001/data/
    
  5. 复制生成其他端口实例,并修改配置文件

    cd /redis/cluster
    cp -r 7001/ 7002
    cp -r 7001/ 7003
    cp -r 7001/ 7004
    cp -r 7001/ 7005
    cp -r 7001/ 7006
    cp -r 7001/ 7007
    cp -r 7001/ 7008
    
    # 生成的节点信息文件都在 /redis/cluster 目录下
    

    替换对应节点的配置文件中的配置:

    port 7001
    cluster-config-file nodes-7001.conf
    pidfile /var/run/redis_7001.pid
    dir /redis/cluster/7001/data/
    

    创建持久化文件所在目录:

    mkdir -p /redis/cluster/7001/data/
    mkdir -p /redis/cluster/7002/data/
    mkdir -p /redis/cluster/7003/data/
    mkdir -p /redis/cluster/7004/data/
    mkdir -p /redis/cluster/7005/data/
    mkdir -p /redis/cluster/7006/data/
    mkdir -p /redis/cluster/7007/data/
    mkdir -p /redis/cluster/7008/data/
    
  6. 启动所有 Redis 实例

    /redis/cluster/7001/bin/redis-server /redis/cluster/7001/bin/redis.conf
    /redis/cluster/7002/bin/redis-server /redis/cluster/7002/bin/redis.conf
    /redis/cluster/7003/bin/redis-server /redis/cluster/7003/bin/redis.conf
    /redis/cluster/7004/bin/redis-server /redis/cluster/7004/bin/redis.conf
    /redis/cluster/7005/bin/redis-server /redis/cluster/7005/bin/redis.conf
    /redis/cluster/7006/bin/redis-server /redis/cluster/7006/bin/redis.conf
    /redis/cluster/7007/bin/redis-server /redis/cluster/7007/bin/redis.conf
    /redis/cluster/7008/bin/redis-server /redis/cluster/7008/bin/redis.conf
    
  7. 创建 Redis 集群(创建时 Redis 里不要有数据)

    /redis/cluster/7001/bin/redis-cli --cluster create 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005 127.0.0.1:7006 --cluster-replicas 1
    
    # 以集群方式连接
    /redis/cluster/7001/bin/redis-cli -h 127.0.0.1 -p 7001 -c
    # 集群信息
    cluster info
    # 集群节点
    cluster nodes
    
    # 测试集群,通过查看集群转发
    set k1 v1
    set k2 v2
    set k3 v3
    set k4 v4
    

集群扩容

  1. 集群扩容

    /redis/cluster/7001/bin/redis-cli --cluster add-node 127.0.0.1:7007 127.0.0.1:7001
    
    # 7008 作为 7007 的从节点加入集群,最后的参数是 7007 的集群 id
    /redis/cluster/7001/bin/redis-cli --cluster add-node 127.0.0.1:7008 127.0.0.1:7007 --cluster-slave --cluster-master-id 1439a52999e3b678a8104bb5d1dda87434bd1746
    
    # 确认节点已加入
    /redis/cluster/7001/bin/redis-cli -h 127.0.0.1 -p 7001 -c
    cluster nodes
    
  2. 给 7007 分槽

    /redis/cluster/7001/bin/redis-cli --cluster reshard 127.0.0.1:7007
    
    # 7007 的 ID :
    # 1439a52999e3b678a8104bb5d1dda87434bd1746
    

集群缩容

  1. 将槽分配出去

    /redis/cluster/7001/bin/redis-cli --cluster reshard 127.0.0.1:7001
    
  2. 删除集群节点,先删除从节点,后删除主节点

    /redis/cluster/7001/bin/redis-cli --cluster del-node 127.0.0.1:7008 69ac90b063478565b0aeb888871c2cd9acbbbb81
    /redis/cluster/7001/bin/redis-cli --cluster del-node 127.0.0.1:7007 1439a52999e3b678a8104bb5d1dda87434bd1746
    
posted @ 2021-03-04 15:11  流星<。)#)))≦  阅读(51)  评论(0编辑  收藏  举报