1、给新redis实例创建redis配置（复制redis.conf）
$ cp /etc/redis.conf /etc/redis-xxx.conf
2、修改复制的redis-xxx.conf
...
#修改pidfile
#pidfile /var/run/redis/redis.pid
pidfile /var/run/redis/redis-xxx.pid
...
#dir /var/lib/redis/
dir /var/lib/redis-xxx/
...
#修改端口 port
#port 6379
port 6380
...
#修改日志文件路径 logfile
#logfile /var/log/redis/redis.log
logfile /var/log/redis/redis-xxx.log
...
#修改 vm-swap-file
#vm-swap-file /tmp/redis.swap
vm-swap-file /tmp/redis-xxx.swap
...
3、创建目录 /var/lib/redis-xxx
$ mkdir -p /var/lib/redis-xx
4、复制原来redis的service脚本
$ cp /usr/lib/systemd/system/redis.service /usr/lib/systemd/system/redis-xxx.service
5、修改新的redis-xxx.service脚本
...
#[Unit]
Description=Redis persistent key-value database
After=network.target
#[Service]
ExecStart=/usr/bin/redis-server /etc/redis-xxx.conf --daemonize no
ExecStop=/usr/bin/redis-shutdown
User=redis
Group=redis
#[Install]
WantedBy=multi-user.target
...
注意：这里只修改redis-xxx.conf路径，其他项目不需要修改。
6、启动:
$ service redis-xxx start
7、检查status:
$ service redis-xxx status
8、关闭:
$ service redis-xxx stop
9、重启:
$ service redis-xxx restart
10、问题
如果service找不到，可以先执行以下命令：
$ systemctl unmask packagekit.service
$ systemctl mask packagekit.service
然后重新运行service命令