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Redis主从搭建 7.2.5
文章目录
一. 同主机搭建Redis主从
1. 环境介绍
同机器 一主两从
| 操作系统 | Centos 7 |
|---|---|
| 内核版本 | Linux 3.10.0-957.el7.x86_64 |
| 主机名称 | master-salve |
| IP地址 | 192.168.1.100 |
| 端口 | master: 16370 slave1: 16371 slave2: 16372 |
| Redis | 7.2.5 |
2. 环境前准备工作
# 关闭防火墙 systemctl stop firewalld systemctl disable firewalld # 修改 hostname hostnamectl set-hostname xxxx # 修改后退出当前终端重新连接即可 # 更新下软件源 # 地址 https://developer.aliyun.com/mirror/ # 时区调整，时间校准 date -R timedatectl set-timezone Asia/Shanghai yum -y install ntp ntpdate ntp1.aliyun.com # 关闭 selinux： sed -i 's/enforcing/disabled/' /etc/selinux/config setenforce 0 3. 安装 Redis 7.2.5
# 下载地址 http://download.redis.io/releases/ # 下载 wget http://download.redis.io/releases/redis-7.2.5.tar.gz # 解压 tar -xf redis-7.2.5.tar.gz -C /opt/redis # 编译 make MALLOC=libc # 安装 注意如果安装提示python3不存在 执行 yum install -y python3 make install PREFIX=/usr/local/redis # 配置环境变量 vi /etc/profile.d/redis.sh #!/bin/bash export REDIS_HOME=/usr/local/redis export PATH=$PATH:$REDIS_HOME/bin # 使其配置生效 source /etc/profile.d/redis.sh 4. redis 配置修改并且启动
4.1 修改配置文件
# 创建redis数据存储目录 mkdir -p /usr/local/redis/data/1637{0..2} # 创建redis配置文件存储目录 mkdir -p /usr/local/redis/conf/1637{0..2} # 创建redis日志存储目录 mkdir -p /usr/local/redis/log/1637{0..2} # 创建redis pid存储目录 mkdir /usr/local/redis/run # redis配置文件 16370 # 开启保护模式 protected-mode yes # 添加本机的ip bind 192.168.1.100 # 端口 port 16370 # pid存储目录 pidfile /usr/local/redis/run/redis_16370.pid # 日志存储目录 logfile /usr/local/redis/log/16370/redis_16370.log # 数据存储目录，目录要提前创建好 dir /usr/local/redis/data/16370 # 设置实例的验证口令 requirepass dongdong # 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。 # 此配置项中值需要和master机器的“requirepass”保持一致 masterauth dongdong # 配置RDB持久化策略 save 900 1 save 300 10 save 60 10000 # 配置AOF持久化 appendonly yes appendfsync everysec # 守护进程 daemonize yes # redis配置文件 16371 # 开启保护模式 protected-mode yes # 添加本机的ip bind 192.168.1.100 # 端口 port 16371 # pid存储目录 pidfile /usr/local/redis/run/redis_16371.pid # 日志存储目录 logfile /usr/local/redis/log/16370/redis_16371.log # 数据存储目录，目录要提前创建好 dir /usr/local/redis/data/16371 # 设置实例的验证口令 requirepass dongdong # 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。 # 此配置项中值需要和master机器的“requirepass”保持一致 masterauth dongdong # 配置RDB持久化策略 save 900 1 save 300 10 save 60 10000 # 配置AOF持久化 appendonly yes appendfsync everysec # 守护进程 daemonize yes # redis配置文件 16372 # 开启保护模式 protected-mode yes # 添加本机的ip bind 192.168.1.100 # 端口 port 16372 # pid存储目录 pidfile /usr/local/redis/run/redis_16372.pid # 日志存储目录 logfile /usr/local/redis/log/16370/redis_16372.log # 数据存储目录，目录要提前创建好 dir /usr/local/redis/data/16372 # 设置实例的验证口令 requirepass dongdong # 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。 # 此配置项中值需要和master机器的“requirepass”保持一致 masterauth dongdong # 配置RDB持久化策略 save 900 1 save 300 10 save 60 10000 # 配置AOF持久化 appendonly yes appendfsync everysec # 守护进程 daemonize yes # 复制下面命令即可 cat > /usr/local/redis/conf/redis_16370.conf <<EOF # 开启保护模式 protected-mode yes # 添加本机的ip bind 192.168.1.100 # 端口 port 16370 # pid存储目录 pidfile /usr/local/redis/run/redis_16370.pid # 日志存储目录 logfile /usr/local/redis/log/16370/redis_16370.log # 数据存储目录，目录要提前创建好 dir /usr/local/redis/data/16370 # 设置实例的验证口令 requirepass dongdong # 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。 # 此配置项中值需要和master机器的“requirepass”保持一致 masterauth dongdong # 配置RDB持久化策略 save 900 1 save 300 10 save 60 10000 # 配置AOF持久化 appendonly yes appendfsync everysec # 守护进程 daemonize yes EOF cat > /usr/local/redis/conf/redis_16371.conf <<EOF # 开启保护模式 protected-mode yes # 添加本机的ip bind 192.168.1.100 # 端口 port 16371 # pid存储目录 pidfile /usr/local/redis/run/redis_16371.pid # 日志存储目录 logfile /usr/local/redis/log/16370/redis_16371.log # 数据存储目录，目录要提前创建好 dir /usr/local/redis/data/16371 # 设置实例的验证口令 requirepass dongdong # 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。 # 此配置项中值需要和master机器的“requirepass”保持一致 masterauth dongdong # 配置RDB持久化策略 save 900 1 save 300 10 save 60 10000 # 配置AOF持久化 appendonly yes appendfsync everysec # 守护进程 daemonize yes EOF cat > /usr/local/redis/conf/redis_16372.conf <<EOF # 开启保护模式 protected-mode yes # 添加本机的ip bind 192.168.1.100 # 端口 port 16372 # pid存储目录 pidfile /usr/local/redis/run/redis_16372.pid # 日志存储目录 logfile /usr/local/redis/log/16370/redis_16372.log # 数据存储目录，目录要提前创建好 dir /usr/local/redis/data/16372 # 设置实例的验证口令 requirepass dongdong # 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。 # 此配置项中值需要和master机器的“requirepass”保持一致 masterauth dongdong # 配置RDB持久化策略 save 900 1 save 300 10 save 60 10000 # 配置AOF持久化 appendonly yes appendfsync everysec # 守护进程 daemonize yes EOF 4.2 编写启动脚本
# 启动脚本 cat > /usr/local/redis/bin/master-slave_start.sh << EOF #!/bin/bash redis-server /usr/local/redis/conf/redis_16370.conf redis-server /usr/local/redis/conf/redis_16371.conf redis-server /usr/local/redis/conf/redis_16372.conf EOF # 赋予可执行权限 chmod +x /usr/local/redis/bin/master-slave_start.sh # 关闭脚本 vi /usr/local/redis/bin/master-slave_shutdown.sh #!/bin/bash kill -9 $(ps -ef | grep 1637 | grep -v grep | awk '{print $2}') # 赋予可执行权限 chmod +x /usr/local/redis/bin/master-slave_shutdown.sh 5. 开启主从
5.1 开启
# 以"192.168.1.100:16370"实例为主库，以"192.168.1.100:16371"实例和"192.168.1.100:16372"实例为从库。 # -a 参数指定密码 # 从库实例开启主从 redis-cli -h 192.168.1.100 -p 16371 -a dongdong slaveof 192.168.1.100 16370 redis-cli -h 192.168.1.100 -p 16372 -a dongdong slaveof 192.168.1.100 16370 # Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # 警告：在命令行界面上使用带有“-a”或“-u”选项的密码可能不安全。 可以忽略 # 解决方式 # redis-cli -h 192.168.1.100 -p 16371 -a dongdong --no-auth-warning slaveof 192.168.1.100 16370 5.2 主库实例查看主从信息
redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication [root@master-slave ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:master connected_slaves:2 slave0:ip=192.168.1.100,port=16371,state=online,offset=8428,lag=0 slave1:ip=192.168.1.100,port=16372,state=online,offset=8428,lag=1 master_failover_state:no-failover master_replid:a292603e2c96a6f451055e6d84a60795f81f2928 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:8428 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:8428 5.3 从库实例查看主从信息
# 192.168.1.100:16371 查看主从信息 redis-cli -h 192.168.1.100 -p 16371 -a dongdong info replication [root@master-slave ~]# redis-cli -h 192.168.1.100 -p 16371 -a dongdong info replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:slave master_host:192.168.1.100 master_port:16370 master_link_status:up master_last_io_seconds_ago:0 master_sync_in_progress:0 slave_read_repl_offset:8680 slave_repl_offset:8680 slave_priority:100 slave_read_only:1 replica_announced:1 connected_slaves:0 master_failover_state:no-failover master_replid:a292603e2c96a6f451055e6d84a60795f81f2928 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:8680 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:15 repl_backlog_histlen:8666 5.4 验证主从配置是否生效
# "192.168.1.100:16370"实例主库的11号数据库创建测试数据 redis-cli -h 192.168.1.100 -p 16370 -a dongdong -n 11 [root@master-slave ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong -n 11 Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. 192.168.1.100:16370[11]> keys * (empty array) 192.168.1.100:16370[11]> set name dongdong OK 192.168.1.100:16370[11]> set age 18 OK 192.168.1.100:16370[11]> keys * 1) "age" 2) "name" # "192.168.1.100:16371"实例从库的11号数据库查看是否同步主库的11号数据库 redis-cli -h 192.168.1.100 -p 16371 -a dongdong -n 11 [root@master-slave ~]# redis-cli -h 192.168.1.100 -p 16371 -a dongdong -n 11 Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. 192.168.1.100:16371[11]> keys * 1) "name" 2) "age" 192.168.1.100:16371[11]> get name "dongdong" 192.168.1.100:16371[11]> get age "18" 192.168.1.100:16371[11]> # "192.168.1.100:16372"实例从库的11号数据库查看是否同步主库的11号数据库 redis-cli -h 192.168.1.100 -p 16372 -a dongdong -n 11 [root@master-slave ~]# redis-cli -h 192.168.1.100 -p 16372 -a dongdong -n 11 Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. 192.168.1.100:16372[11]> keys * 1) "age" 2) "name" 192.168.1.100:16372[11]> get name "dongdong" 192.168.1.100:16372[11]> get age "18" 192.168.1.100:16372[11]> 6. 解除 192.168.1.100:16372 实例主从
# 192.168.1.100:16372 查看主从信息 redis-cli -h 192.168.1.100 -p 16372 -a dongdong info replication [root@master-slave ~]# redis-cli -h 192.168.1.100 -p 16372 -a dongdong info replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:slave master_host:192.168.1.100 master_port:16370 master_link_status:up master_last_io_seconds_ago:4 master_sync_in_progress:0 slave_read_repl_offset:10003 slave_repl_offset:10003 slave_priority:100 slave_read_only:1 replica_announced:1 connected_slaves:0 master_failover_state:no-failover master_replid:a292603e2c96a6f451055e6d84a60795f81f2928 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:10003 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:155 repl_backlog_histlen:9849 # 192.168.1.100:16370 查看主从信息 redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication [root@master-slave ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:master connected_slaves:2 slave0:ip=192.168.1.100,port=16371,state=online,offset=10157,lag=0 slave1:ip=192.168.1.100,port=16372,state=online,offset=10157,lag=0 master_failover_state:no-failover master_replid:a292603e2c96a6f451055e6d84a60795f81f2928 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:10157 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:10157 # 解除 192.168.1.100:16372 主从信息 redis-cli -h 192.168.1.100 -p 16372 -a dongdong slaveof no one [root@master-slave ~]# redis-cli -h 192.168.1.100 -p 16372 -a dongdong slaveof no one Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. OK # 再次查看 192.168.1.100:16370 查看主从信息 redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication [root@master-slave ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:master connected_slaves:1 slave0:ip=192.168.1.100,port=16371,state=online,offset=10731,lag=0 master_failover_state:no-failover master_replid:a292603e2c96a6f451055e6d84a60795f81f2928 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:10731 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:10731 # 只剩下一个 从节点了 # 把192.168.1.100:16372 添加回来 redis-cli -h 192.168.1.100 -p 16372 -a dongdong slaveof 192.168.1.100 16370 [root@master-slave ~]# redis-cli -h 192.168.1.100 -p 16372 -a dongdong slaveof 192.168.1.100 16370 Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. OK # 此时再看192.168.1.100:16370 查看主从信息 redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication [root@master-slave ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:master connected_slaves:2 slave0:ip=192.168.1.100,port=16371,state=online,offset=10941,lag=0 slave1:ip=192.168.1.100,port=16372,state=online,offset=10941,lag=0 master_failover_state:no-failover master_replid:a292603e2c96a6f451055e6d84a60795f81f2928 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:10941 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:10941 # slaves 变成2了 二. 跨节点部署Redis主从
1. 环境介绍
| 操作系统 | Centos 7 | Centos 7 | Centos 7 |
|---|---|---|---|
| 内核版本 | Linux 3.10.0-957.el7.x86_64 | Linux 3.10.0-957.el7.x86_64 | Linux 3.10.0-957.el7.x86_64 |
| 主机名称 | master | slave1 | slave2 |
| IP | 192.168.1.100 | 192.168.1.200 | 192.168.1.250 |
| 端口 | 16380 | 16381 | 16382 |
2. 修改配置文件
2.1 master
# 创建redis数据存储目录 mkdir -p /usr/local/redis/data/16380 # 创建redis配置文件存储目录 mkdir -p /usr/local/redis/conf/16380 # 创建redis日志存储目录 mkdir -p /usr/local/redis/log/16380 # 创建redis pid存储目录 mkdir /usr/local/redis/run # 复制下面命令即可 cat > /usr/local/redis/conf/redis_16380.conf<<EOF # 开启保护模式 protected-mode yes # 添加本机的ip bind 192.168.1.100 # 端口 port 16380 # pid存储目录 pidfile /usr/local/redis/run/redis_16380.pid # 日志存储目录 logfile /usr/local/redis/log/redis_16380.log # 数据存储目录，目录要提前创建好 dir /usr/local/redis/data/16380 # 设置实例的验证口令 requirepass dongdong # 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。 # 此配置项中值需要和master机器的“requirepass”保持一致 masterauth dongdong # 配置RDB持久化策略 save 900 1 save 300 10 save 60 10000 # 配置AOF持久化 appendonly yes appendfsync everysec # 守护进程 daemonize yes EOF 2.2 slave 1
# 创建redis数据存储目录 mkdir -p /usr/local/redis/data/16381 # 创建redis配置文件存储目录 mkdir -p /usr/local/redis/conf/16381 # 创建redis日志存储目录 mkdir -p /usr/local/redis/log/16381 # 创建redis pid存储目录 mkdir /usr/local/redis/run # 复制下面命令即可 cat > /usr/local/redis/conf/redis_16381.conf <<EOF # 开启保护模式 protected-mode yes # 添加本机的ip bind 192.168.1.200 # 端口 port 16381 # pid存储目录 pidfile /usr/local/redis/run/redis_16381.pid # 日志存储目录 logfile /usr/local/redis/log/redis_16381.log # 数据存储目录，目录要提前创建好 dir /usr/local/redis/data/16381 # 设置实例的验证口令 requirepass dongdong # 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。 # 此配置项中值需要和master机器的“requirepass”保持一致 masterauth dongdong # 配置RDB持久化策略 save 900 1 save 300 10 save 60 10000 # 配置AOF持久化 appendonly yes appendfsync everysec # 守护进程 daemonize yes EOF 2.3 slave 2
# 创建redis数据存储目录 mkdir -p /usr/local/redis/data/16382 # 创建redis配置文件存储目录 mkdir -p /usr/local/redis/conf/16382 # 创建redis日志存储目录 mkdir -p /usr/local/redis/log/16382 # 创建redis pid存储目录 mkdir /usr/local/redis/run # 复制下面命令即可 cat > /usr/local/redis/conf/redis_16382.conf <<EOF # 开启保护模式 protected-mode yes # 添加本机的ip bind 192.168.1.250 # 端口 port 16382 # pid存储目录 pidfile /usr/local/redis/run/redis_16382.pid # 日志存储目录 logfile /usr/local/redis/log/redis_16382.log # 数据存储目录，目录要提前创建好 dir /usr/local/redis/data/16382 # 设置实例的验证口令 requirepass dongdong # 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。 # 此配置项中值需要和master机器的“requirepass”保持一致 masterauth dongdong # 配置RDB持久化策略 save 900 1 save 300 10 save 60 10000 # 配置AOF持久化 appendonly yes appendfsync everysec # 守护进程 daemonize yes EOF 3.启动Redis
3.1 master
redis-server /usr/local/redis/conf/redis_16380.conf 3.2 slave 1
redis-server /usr/local/redis/conf/redis_16381.conf 3.3 slave 2
redis-server /usr/local/redis/conf/redis_16382.conf 4. 开启主从
4.1 slave 1
# 从库开启主从 redis-cli -h 192.168.1.200 -p 16381 -a dongdong slaveof 192.168.1.100 16380 [root@slave1 ~]# redis-cli -h 192.168.1.200 -p 16381 -a dongdong slaveof 192.168.1.100 16380 Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. OK # 从库查看主从信息 redis-cli -h 192.168.1.200 -p 16381 -a dongdong info replication [root@slave1 ~]# redis-cli -h 192.168.1.200 -p 16381 -a dongdong info replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:slave master_host:192.168.1.100 master_port:16380 master_link_status:up master_last_io_seconds_ago:3 master_sync_in_progress:0 slave_read_repl_offset:532 slave_repl_offset:532 slave_priority:100 slave_read_only:1 replica_announced:1 connected_slaves:0 master_failover_state:no-failover master_replid:7330881025ee2709ee6c9c32ea3fcc9b6649893d master_replid2:0000000000000000000000000000000000000000 master_repl_offset:532 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:15 repl_backlog_histlen:518 4.2 slave 2
# 从库开启主从 redis-cli -h 192.168.1.250 -p 16382 -a dongdong slaveof 192.168.1.100 16380 [root@slave2 ~]# redis-cli -h 192.168.1.250 -p 16382 -a dongdong slaveof 192.168.1.100 16380 Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. OK # 从库查看主从信息 redis-cli -h 192.168.1.250 -p 16382 -a dongdong info replication [root@slave2 ~]# redis-cli -h 192.168.1.250 -p 16382 -a dongdong info replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:slave master_host:192.168.1.100 master_port:16380 master_link_status:up master_last_io_seconds_ago:10 master_sync_in_progress:0 slave_read_repl_offset:560 slave_repl_offset:560 slave_priority:100 slave_read_only:1 replica_announced:1 connected_slaves:0 master_failover_state:no-failover master_replid:7330881025ee2709ee6c9c32ea3fcc9b6649893d master_replid2:0000000000000000000000000000000000000000 master_repl_offset:560 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:211 repl_backlog_histlen:350 4.3 master
# 查看 主从信息 redis-cli -h 192.168.1.100 -p 16380 -a dongdong info replication [root@master ~]# redis-cli -h 192.168.1.100 -p 16380 -a dongdong info replication Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. # Replication role:master connected_slaves:2 slave0:ip=192.168.1.200,port=16381,state=online,offset=336,lag=0 slave1:ip=192.168.1.250,port=16382,state=online,offset=336,lag=1 master_failover_state:no-failover master_replid:7330881025ee2709ee6c9c32ea3fcc9b6649893d master_replid2:0000000000000000000000000000000000000000 master_repl_offset:336 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:336 5. 验证主从配置是否生效
# "master主机名"实例主库的11号数据库创建测试数据 redis-cli -h 192.168.1.100 -p 16380 -a dongdong -n 11 [root@master ~]# redis-cli -h 192.168.1.100 -p 16380 -a dongdong -n 11 Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. 192.168.1.100:16380[11]> keys * (empty array) 192.168.1.100:16380[11]> set name dongdong OK 192.168.1.100:16380[11]> set age 18 OK 192.168.1.100:16380[11]> keys * 1) "name" 2) "age" 192.168.1.100:16380[11]> # "slave1主机名"实例从库的11号数据库查看是否同步主库的11号数据库 redis-cli -h 192.168.1.200 -p 16381 -a dongdong -n 11 [root@slave1 ~]# redis-cli -h 192.168.1.200 -p 16381 -a dongdong -n 11 Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. 192.168.1.200:16381[11]> get name "dongdong" 192.168.1.200:16381[11]> get age "18" 192.168.1.200:16381[11]> key * (error) ERR unknown command 'key', with args beginning with: '*' 192.168.1.200:16381[11]> keys * 1) "age" 2) "name" 192.168.1.200:16381[11]> # "slave2主机名"实例从库的11号数据库查看是否同步主库的11号数据库 redis-cli -h 192.168.1.250 -p 16382 -a dongdong -n 11 [root@slave2 ~]# redis-cli -h 192.168.1.250 -p 16382 -a dongdong -n 11 Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. 192.168.1.250:16382[11]> get name "dongdong" 192.168.1.250:16382[11]> get age "18" 192.168.1.250:16382[11]> keys * 1) "age" 2) "name" 192.168.1.250:16382[11]> # 如果针对 slave1 或者 slave2 进行写入操作 则会报错 错误信息 只能在master操作哦 (error) READONLY You can't write against a read only replica. 