redis安装、持久化、主从复制、哨兵、集群等配置

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1.基于Center OS7安装redis

1.1下载安装包

wget http://download.redis.io/releases/redis-5.0.8.tar.gz

1.2解压

tar –xvf redis-5.0.8.tar.gz

1.3编译和安装

make install

安装完成以后进入redis目录

cd redis-5.0.8/src
~~~~

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2.启动多个redis服务

2.1指定端口启动服务

服务端启动：redis-server --port 6380

客户端启动：redis-cli -p 6380

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2.2配置文件启动方式

(1)进入redis配置文件redis.conf

执行命令: cat redis.conf

(2)打开redis.conf文件后无法阅读，信息量太大了,简化过滤掉redis.conf文件里面的注释执行命令: cat redis.conf | grep -v "#" | grep -v "^$"

这回再次打开redis.conf文件后就清晰多了，但是这时当前这个文件不要修改，如果想修改需要执行如下命令：cat redis.conf | grep -v "#" | grep -v "^$" > redis-6379.conf 这是生成一个新的文件叫redis-6379.conf

(3)编译刚才生成的新文件

执行命令: vim redis-6379.conf

删除无用的信息后保留如下：

创建mkdir date目录

修改文件后如下：

(4)用配置文件启动
执行命令：redis-server redis-6379.conf

查看刚才执行的命令是否启动

执行命令: ps -ef | grep redis-

如果不确定可以再次验证如下图：

杀死redis端口6379服务

将创建的redis-6379.conf文件管理起来，这里需要重新创建个目录

mkdir conf

将redis-6379.conf文件移动到刚才创建的conf目录中

执行命令：mv redis-6379.conf conf

(5)通过配置文件启动多个服务

复制文件redis-6379.conf

执行命令：cp redis-6379.conf redis-6380.conf

编辑redis-6380.conf文件，修改后如下

启动redis-6380.conf和redis-6379.conf

redis-server redis-6380.conf
redis-server redis-6379.conf

用ps -ef | grep redis命令查看如下

连接客户端

执行命令：redis-cli -p 6379

3.Redis持久化相关配置

3.1 RDB启动方式和相关配置

3.1.1修改生成后的dump.rdb名字

rdbcompression yes 和rdbchecksum yes一个是开启压缩另一个是开启检测

修改配置后需要重启redis服务

查看进程：ps -ef | grep redis-

杀掉进程3538

执行命令：kill -s 9 3538

重新启动redis服务
执行命令：redis-server conf/redis-6379.conf

进入创建好的data目录查看

dump-6379.rdb就是刚才设置好的文件名称

save指令不建议生产环境上使用,因为会阻塞当前redis服务器，直到RDB过程完成为止。
那么如何解决save的阻塞问题呢？

隆重推出bgsave命令，这个可以在后台运行，解决save阻塞的问题。

3.2 AOF持久化策略

3.2.1 AOF三种策略

(1)always(每次)

每次写入操作均同步到AOF文件中，数据零误差，性能较低 不建议用

(2)everysec(每秒)

每秒将缓存区中的指令同步到AOF文件中，数据准确性高，性能较高，宕机情况下丢失1秒内的数据 默认使用这种

(3)no(系统控制)

由操作系统控制每次同步到AOF文件的周期，整体过程不可控

修改配置文件

appendonly 默认是no

appendfsync always | everysec | no

4. 主从复制

4.1主从复制配置

4.1.1 指令连接

(1) 修改redis-6379.conf文件

(2) 修改redis-6380.conf文件

用端口号6380连接6379

执行命令：slaveof 127.0.0.1 6379

通过6379客户端设置值

在6380客户端获取在6379客户端设置的数据

4.1.2 配置文件连接(推荐)

用端口号6380连接6379

修改配置文件redis-6380.conf

5. 哨兵模式

5.1 配置哨兵

查看sentinel.conf配置文件

执行命令: cat sentinel.conf | grep -v "#" | grep -v "^$"

将sentinel.conf复制到conf目录下

执行命令: cat sentinel.conf | grep -v "#" | grep -v "^$" > ./conf/sentinel-26379.conf

修改复制过来的sentinel-26379.conf配置文件

复制多个sentinel.conf文件,

执行命令:

sed 's/26379/26380/g' sentinel-26379.conf > sentinel-26380.conf

sed 's/26379/26381/g' sentinel-26379.conf > sentinel-26381.conf

将26379文件复制了一份配置文件名叫26380，

将26379文件复制了一份配置文件名叫26381

将redis-6380.conf文件复制一份叫redis-6381.conf

执行命令: sed 's/6380/6381/g' redis-6380.conf > redis-6381.conf

分别启动redis服务：

redis-server redis-6379.conf

redis-server redis-6380.conf

redis-server redis-6381.conf

分别启动sentinel

redis-sentinel sentinel-26379.conf

redis-sentinel sentinel-26380.conf
redis-sentinel sentinel-26381.conf

通过info命令查看哨兵启动成功2个哨兵

6. 集群配置

6.1 配置cluster

修改redis-6379.conf文件

cluster-enabled yes 开启集群

cluster-config-file nodes-6379.conf 配置每个节点的配置文件，同样以端口号为名称

cluster-node-timeout 100000 配置集群节点的超时时间，可改可不改

复制上面修改的redis-6379.conf文件
sed "s/6379/6380/g" redis-6379.conf > reids-6380.conf

sed "s/6379/6381/g" redis-6379.conf > reids-6381.conf

sed "s/6379/6382/g" redis-6379.conf > reids-6382.conf

sed "s/6379/6383/g" redis-6379.conf > reids-6383.conf

sed "s/6379/6384/g" redis-6379.conf > reids-6384.conf

sed "s/6379/6385/g" redis-6379.conf > reids-6385.conf
查询下redis状态

创建集群

执行命令：redis-cli --cluster create 127.0.0.1:6379 127.0.0.1:6380 127.0.0.1:6381 127.0.0.1:6382 127.0.0.1:6383 127.0.0.1:6384 --cluster-replicas 1

查看集群状态：

redis-cli --cluster check 127.0.0.1:6379