Redis High Availability: Master-slave replication

Centos 6.4 installs Redis 3.2. (Installation reference: Redis source installation)

Centos222	Centos224
[centos222]# REDIS-CLI 127.0.0.1:6379>set KK 123 127.0.0.1:6379>get KK "123" 127.0.0.1:6379>get mm (nil) 127.0.0.1:6379>exit	[centos224]# REDIS-CLI 127.0.0.1:6379>set KK 123 127.0.0.1:6379>get mm "22222" 127.0.0.1:6379>get KK (nil) 127.0.0.1:6379>exit
next requires remote Access, config file set LAN IP, turn off protected mode Vi/etc/redis/6379.conf
Bind 127.0.0.1 192.168.1.222 Protected-mode No	Bind 127.0.0.1 192.168.1.224 Protected-mode No
Restart the Redis service and add the add-on port to access each other's Redis server.
[centos222]# iptables-i input-p TCP--dport 6379-j ACCEPT [centos222]# redis-cli-h 192.168.1.224-p 6379 192.168.1.224:6379> get mm "22222"	[centos222]# iptables-i input-p TCP--dport 6379-j ACCEPT [centos224]# redis-cli-h 192.168.1.222-p 6379 192.168.1.222:6379> Get KK "123"
access no password, not secure, now set the system password parameter requirepass (Take centos222 as an example, both servers need to be set up)
127.0.0.1:6379> config get Requirepass #查看参数信息 1) "Requirepass" 2) "" 127.0.0.1:6379> config set requirepass 123456 #设置参数 (password) value Ok 127.0.0.1:6379> config get Requirepass #设置密码后无法操作 (Error) Noauth Authentication required. 127.0.0.1:6379> Auth 123456 #使用密码访问 Ok 127.0.0.1:6379> Get KK "123" 127.0.0.1:6379> exit [centos222]# redis-cli-h 192.168.1.224-p 6379-a 123456 #远程访问 192.168.1.224:6379> get mm "22222" 192.168.1.224:6379>
However, when the Redis service restarts, the Requirepass password is invalidated and the null value is changed back to permanently take effect, add this parameter to the configuration file:vi/etc/redis/6379.conf
Requirepass 123456
start Configuring Master-slave replication. Very simple. The configuration parameter slaveof is used primarily . Vi/etc/redis/6379.conf
Centos222 (Master)	Centos224 (slave)
Bind 127.0.0.1 192.168.1.222 Protected-mode No Port 6379 Requirepass 654321	Bind 127.0.0.1 192.168.1.224 Protected-mode No Port 6379 Requirepass 654321 Slaveof 192.168.1.222 6379 Masterauth 654321 Slave-read-only Yes
configuration complete, restart the service. Found in the master set key, the slave can be read (slave read only). Master-Slave configuration is complete.
[Root@centos222 ~]# Redis-cli 127.0.0.1:6379> Auth 654321 Ok 127.0.0.1:6379> Set QQ 6666666 Ok 127.0.0.1:6379> get QQ "6666666" 127.0.0.1:6379>	[root@centos224 ~]# Redis-cli 127.0.0.1:6379> Auth 654321 Ok 127.0.0.1:6379> get QQ "6666666" 127.0.0.1:6379> 127.0.0.1:6379> Set pp 444 (Error) READONLY you can ' t write against a read only slave.
Info Replication View replication configuration information
127.0.0.1:6379> Info Replication # Replication Role:master Connected_slaves:1 Slave0:ip=192.168.1.224,port=6379,state=online,offset=392,lag=0 master_repl_offset:392 Repl_backlog_active:1 repl_backlog_size:1048576 Repl_backlog_first_byte_offset:2 repl_backlog_histlen:391	127.0.0.1:6379> Info Replication # Replication Role:slave master_host:192.168.1.222 master_port:6379 Master_link_status:up Master_last_io_seconds_ago:3 master_sync_in_progress:0 slave_repl_offset:420 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

Two more theoretical posts: Redis persistent rdb and aof Redis persistence

Security and vulnerability: Redis Crackit intrusion Event Analysis