Redis持久化、主从复制、哨兵、集群配置，一步一步走向高可用
1. Redis数据持久化 2. Redis主从复制：从单机到多节点 3. Redis Sentinel主从切换：走向高可用 3.1. 配置主从 参考步骤2. 配置一主一从两个Redis节点，主节点为127.0.0.1:6379，从节点为127.0.0.1:6380。
3.2. 配置sentinel的配置文件 sentinel0.conf
sentinel monitor mymaster 127.0.0.1 6379 2 sentinel down-after-milliseconds mymaster 10000 3.3. 启动一个sentinel节点 使用以下命令启动一个sentinel
redis-sentinel ./conf/sentinel0.conf 启动之后控制台输出如下内容
5643:X 13 Mar 2021 21:40:56.054 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo 5643:X 13 Mar 2021 21:40:56.054 # Redis version=6.0.9, bits=64, commit=00000000, modified=0, pid=5643, just started 5643:X 13 Mar 2021 21:40:56.054 # Configuration loaded 5643:X 13 Mar 2021 21:40:56.055 * Increased maximum number of open files to 10032 (it was originally set to 256).