在 CentOS 7.6 环境中搭建 Redis 主从集群,并使用 systemctl 配置集群自启动。
采用源码编译安装的方式,下载源码:
wget http://download.redis.io/releases/redis-5.0.7.tar.gz -P /usr/local/src
进入到下载目录,解压下载的源码:
cd /usr/local/src/tar -zxvf redis-5.0.7.tar.gz
安装 gcc 编译器,使用 make 编译安装:
cd redis-5.0.7yum install gcc-c++make MALLOC=libc install
完成上面步骤之后,Redis 相关 bin 文件就已经安装到 /usr/bin/local/bin
目录下了:
redis-benchmarkredis-check-aofredis-check-rdbredis-cliredis-sentinel -> redis-serverredis-server
启动 Redis 服务器,使用默认的配置文件 /usr/local/src/redis-5.0.7/redis.conf
,也可指定配置文件:
/usr/local/bin/redis-server ./redis.conf
使用客户端连接 Redis Server,测试是否启动成功:
/usr/local/bin/redis-cli -h 127.0.0.1 -p 6379 -a password
有时候会有中文乱码,要在 redis-cli 后面加上 --raw
。
在本地启动多个 Redis Server 实例,使用不同的配置文件,占用不同的端口。
在 /usr/local/
下建立 redis-cluster
文件夹,再建子文件夹 7001-7006
以及 700*/data/
:
mkdir -p /usr/local/redis-cluster/7000/data \ /usr/local/redis-cluster/7001/data \ /usr/local/redis-cluster/7002/data \ /usr/local/redis-cluster/7003/data \ /usr/local/redis-cluster/7004/data \ /usr/local/redis-cluster/7005/data
在各实例位置中新建 redis.conf
,并配置如下:
port 700*bind 0.0.0.0dir /usr/local/redis-cluster/700*/data/cluster-enabled yescluster-config-file nodes-700*.confcluster-node-timeout 5000cluster-announce-ip 当前集群IPappendonly yesdaemonize yes
启动各 Server 实例:
/usr/local/bin/redis-server /usr/local/redis-cluster/700*/redis.conf
或使用自定义脚本 /var/tmp/redis-cluster.sh
,一次性启动多个实例:
#!/bin/bash/usr/local/bin/redis-server /usr/local/redis-cluster/7000/redis.conf/usr/local/bin/redis-server /usr/local/redis-cluster/7001/redis.conf/usr/local/bin/redis-server /usr/local/redis-cluster/7002/redis.conf/usr/local/bin/redis-server /usr/local/redis-cluster/7003/redis.conf/usr/local/bin/redis-server /usr/local/redis-cluster/7004/redis.conf/usr/local/bin/redis-server /usr/local/redis-cluster/7005/redis.conf
添加执行权限并执行:
chmod +x redis-cluster.sh./redis-cluster.sh
查看各实例进程
[root@bbc106 redis-cluster]# ps -ef | grep redis6446 1 0 03:13 /usr/local/bin/redis-server 0.0.0.0:7000 [cluster]6553 1 0 03:14 /usr/local/bin/redis-server 0.0.0.0:7001 [cluster]6577 1 0 03:14 /usr/local/bin/redis-server 0.0.0.0:7002 [cluster]6585 1 0 03:14 /usr/local/bin/redis-server 0.0.0.0:7003 [cluster]6595 1 0 03:14 /usr/local/bin/redis-server 0.0.0.0:7004 [cluster]6605 1 0 03:14 /usr/local/bin/redis-server 0.0.0.0:7005 [cluster]
使用 /usr/local/bin/redis-cli
建立集群:
/usr/local/bin/redis-cli --cluster create 127.0.0.1:7000 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 --cluster-replicas 1
看到如下 log:
>>> Performing hash slots allocation on 6 nodes...Master[0] -> Slots 0 - 5460Master[1] -> Slots 5461 - 10922Master[2] -> Slots 10923 - 16383...[OK] All 16384 slots covered.
客户端连接任一节点,并使用 cluster nodes
或 cluster info
查看集群信息:
[root@bbc106 local]# /usr/local/bin/redis-cli -h 127.0.0.1 -p 7000127.0.0.1:7000> cluster nodes
集群信息如下图:
使用 systemd 配置集群自启动,首先添加 systemd unit service 配置文件 /usr/lib/systemd/system/redis-cluster.service
:
[Unit]Description=Redis 5.0 Cluster ServiceAfter=network.target
[Service]Type=forkingExecStart=/usr/local/redis-cluster/redis-cluster.sh
[Install]WantedBy=default.target
其中 Redis 进程启动类型和 redis 服务的启动方式有关:
Type=notify
配置开机启动,首先在 /etc/systemd/system/ 下建立 redis-cluster.service 的软链接:
ln -s /usr/lib/systemd/system/redis-cluster.service
重新加载 systemd 服务:
systemctl daemon-reload
启动 redis 集群服务并设置 开机启动:
sudo systemctl start redis-clustersudo systemctl enable redis-cluster
重启服务器测试集群自启动:
sudo systemctl reboot
https://www.freedesktop.org/software/systemd/man/systemd.service.html
https://gist.github.com/nexdrew/14392032ed6f105474a3
https://gist.github.com/hackedunit/a53f0b5376b3772d278078f686b04d38