文章目录
- 1. 部署划分
- 2. 单机安装Redis
- 3. 创建配置/数据/日志目录
- 4. 修改配置文件
- 5. redis启动
- 6. 登录查看信息
- 7. 读写分离
1. 部署划分
| ip | 角色 |
|---|---|
| 192.168.92.100 | Master |
| 192.168.92.101 | Slave |
| 192.168.92.102 | Slave |
2. 单机安装Redis
首先在在3台服务器上分别安装Redis单机环境
(单机)Linux环境安装最新版Redis-6.2.0
3. 创建配置/数据/日志目录
声明:下面流程3个节点依次操作
# 创建配置目录
mkdir /usr/local/redis/conf# 创建数据目录
mkdir /usr/local/redis/data# 创建日志目录
mkdir /usr/local/redis/log
4. 修改配置文件
3个节点依次创建一个redis.conf配置文件在conf目录下面
vi /usr/local/redis/conf/redis.conf
主节点配置
# 放行访问IP的限制 多个用空格隔开
# 0.0.0.0 代表无限制
bind 0.0.0.0# 后台启动开启
daemonize yes# 日志存储目录以及日志文件名
logfile "/usr/local/redis/log/redis.log"# rdb数据文件名
dbfilename dump.rdb# aof模式开启
appendonly no# aof数据文件名
appendfilename "appendonly.aof"#rdb数据文件和aof数据文件存储目录
dir /usr/local/redis/data# 设置密码
requirepass 123456# 从节点访问主节点的密码(必须和requirepass 一致)
masterauth 123456#从节点只读模式
replica-read-only yes
2个Slave节点配置
vi /usr/local/redis/conf/redis.conf
主节点配置
# 放行访问IP的限制 多个用空格隔开
# 0.0.0.0 代表无限制
bind 0.0.0.0# 后台启动开启
daemonize yes# 日志存储目录以及日志文件名
logfile "/usr/local/redis/log/redis.log"# rdb数据文件名
dbfilename dump.rdb# aof模式开启
appendonly no# aof数据文件名
appendfilename "appendonly.aof"#rdb数据文件和aof数据文件存储目录
dir /usr/local/redis/data# 设置密码
requirepass 123456# 从节点访问主节点的密码(必须和requirepass 一致)
masterauth 123456#从节点只读模式
replica-read-only yes# 从节点从属于那个主节点
slaveof 192.168.92.100 63795. redis启动
主节点
[root@bigdata01 bin]# /usr/local/redis/bin/redis-server /usr/local/redis/conf/redis.conf
[root@bigdata01 bin]# ps -ef |grep redis
root 11960 1 0 17:15 ? 00:00:00 /usr/local/redis/bin/redis-server 0.0.0.0:6379
root 11977 7237 0 17:16 pts/0 00:00:00 grep --color=auto redis
01节点
[root@bigdata02 ~]# /usr/local/redis/bin/redis-server /usr/local/redis/conf/redis.conf
[root@bigdata02 ~]# ps -ef |grep redis
root 23879 1 0 17:16 ? 00:00:00 /usr/local/redis/bin/redis-server 0.0.0.0:6379
root 23885 23847 0 17:16 pts/0 00:00:00 grep --color=auto redis
02节点
[root@bigdata03 bin]# /usr/local/redis/bin/redis-server /usr/local/redis/conf/redis.conf
[root@bigdata03 bin]# ps -ef |grep redis
root 23814 1 0 17:16 ? 00:00:00 /usr/local/redis/bin/redis-server 0.0.0.0:6379
root 23820 19247 0 17:16 pts/0 00:00:00 grep --color=auto redis
6. 登录查看信息
主节点信息
[root@bigdata01 bin]# /usr/local/redis/bin/redis-cli -a 123456
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
127.0.0.1:6379> info replication
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.92.101,port=6379,state=online,offset=266,lag=1
slave1:ip=192.168.92.102,port=6379,state=online,offset=266,lag=1
master_failover_state:no-failover
master_replid:b1f446c9ea7c0d5e95c8c47f31bb007cea158ce8
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:266
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:266
127.0.0.1:6379> 01节点信息
[root@bigdata02 ~]# /usr/local/redis/bin/redis-cli -a 123456
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
127.0.0.1:6379> info replication
# Replication
role:slave
master_host:192.168.92.100
master_port:6379
master_link_status:up
master_last_io_seconds_ago:4
master_sync_in_progress:0
slave_repl_offset:392
slave_priority:100
slave_read_only:1
connected_slaves:0
master_failover_state:no-failover
master_replid:b1f446c9ea7c0d5e95c8c47f31bb007cea158ce8
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:392
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:392
127.0.0.1:6379> 02节点信息
[root@bigdata03 bin]# /usr/local/redis/bin/redis-cli -a 123456
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
127.0.0.1:6379> info replication
# Replication
role:slave
master_host:192.168.92.100
master_port:6379
master_link_status:up
master_last_io_seconds_ago:6
master_sync_in_progress:0
slave_repl_offset:448
slave_priority:100
slave_read_only:1
connected_slaves:0
master_failover_state:no-failover
master_replid:b1f446c9ea7c0d5e95c8c47f31bb007cea158ce8
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:448
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:15
repl_backlog_histlen:434
127.0.0.1:6379>
7. 读写分离
master节点 能读能写验证
127.0.0.1:6379> set name zhangsan
OK
127.0.0.1:6379> get name
"zhangsan"
127.0.0.1:6379>
01 slave节点 能读不能写验证
127.0.0.1:6379> get name
"zhangsan"
127.0.0.1:6379> set lisi
(error) ERR wrong number of arguments for 'set' command
127.0.0.1:6379>
01 slave节点 能读不能写验证
27.0.0.1:6379> get name
"zhangsan"
127.0.0.1:6379> set name lisi
(error) READONLY You can't write against a read only replica.
127.0.0.1:6379>
