redis 读写分离

配置master 和slave

1.master服务器信息

ip:node1 port:6379 密码:123456

 

2.slave配置master

ip:node2 port:6379 密码:123456

修改redis-config文件

slaveof node1 6379    指定master的ip和port
masterauth 123456     master有验证的情况下
slave-read-only yes   设置slave为只读模式

 

确认主从配置

master:

node1:6379> INFO replication

# Replication
role:master
connected_slaves:1
slave0:ip=node1,port=6379,state=online,offset=309,lag=1

slave:

node2:6379> INFO replication
# Replication
role:slave
master_host:node1
master_port:6379
master_link_status:up
master_last_io_seconds_ago:7
master_sync_in_progress:0
slave_repl_offset:365
slave_priority:100
slave_read_only:1
connected_slaves:0
master_repl_offset:0
repl_backlog_active:0
repl_backlog_size:1048576
repl_backlog_first_byte_offset:0
repl_backlog_histlen:0

slave升级为master

当node1不可用时，可以将node2 从slave切换为master

node2:6379> SLAVEOF NO ONE

master 切换为slave

当node1服务器可用时，可以把node2从master再切换回slave

node2:6379> SLAVEOF node1 6379