部署LNP+Redis、创建Redis集群、连接集群、集群工作原理-Toy模板网

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常用命令的使用

配置64本机的nginx网站服务可以把数据存储在本机的内存里

在64运行nginx服务，并配置可以解析php脚本

在64主机运行redis服务，并允许在127地址连接服务

[root@redis64 ~]# yum -y install redis    # 安装软件
[root@redis64 ~]# systemctl start redis    # 启动服务
[root@redis64 ~]# netstat -utnlp | grep redis-server    # 查看端口
tcp        0      0 127.0.0.1:6379    0.0.0.0:*    LISTEN      1970/redis-server 1
[root@redis64 ~]# redis-cli    # 连接服务
127.0.0.1:6379> ping    # 检查能否正在访问
PONG 
127.0.0.1:6379> set test aaa    # 存储变量
OK
127.0.0.1:6379> get test    # 查看变量
"aaa"
127.0.0.1:6379> exit    # 断开连接
[root@redis64 ~]#

修改服务运行参数

[root@redis64 ~]# systemctl stop redis
[root@redis64 ~]# vim /etc/redis.conf
bind 192.168.88.64
port 6364
requirepass 123456
[root@redis64 ~]# setenforce 0
[root@redis64 ~]# systemctl start redis
[root@redis64 ~]# netstat  -utnlp  | grep redis-server
tcp   0    0 192.168.88.64:6364   0.0.0.0:*    LISTEN      2009/redis-server 1 
[root@redis64 ~]#
[root@redis64 ~]# redis-cli  -h 192.168.88.64 -p 6364 连接服务
192.168.88.64:6364> ping 不输入密码无法正常访问
(error) NOAUTH Authentication required.
192.168.88.64:6364> auth 123456  输入密码
OK
192.168.88.64:6364> keys *  查看存储的变量
1) "test"
192.168.88.64:6364> exit  断开连接
[root@redis64 ~]#

部署LNP + Redis

配置nginx网站的php脚本可以连接redis服务存储数据

在64部署LNP环境

安装源码nginx及php

[root@redis64 ~]# yum  -y  install gcc make pcre-devel zlib-devel    # 安装依赖
[root@redis64 ~]# tar -xf nginx-1.22.1.tar.gz    # 解压源码
[root@redis64 ~]# cd nginx-1.22.1    # 进源码目录
[root@redis64 ~]# ./configure    # 配置
[root@redis64 ~]# make    # 编译
[root@redis64 ~]# make install    # 安装
[root@redis64 ~]# ls /usr/local/nginx/    # 查看安装目录
conf  html  logs  sbin
[root@redis64 ~]# yum -y install php php-fpm php-devel    # 安装 php 软件

配置动静分离

[root@redis64 ~]# vim +65 /usr/local/nginx/conf/nginx.conf
location ~ \.php$ {
            root           html;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
            include        fastcgi.conf;
        }

启动nginx服务

[root@redis64 ~]# /usr/local/nginx/sbin/nginx -t    # 测试配置
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@redis64 ~]# /usr/local/nginx/sbin/nginx     # 启动服务
[root@redis64 ~]# netstat -utnlp | grep 80
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      10469/nginx: master

启动php-fpm服务

[root@redis64 ~]# vim /etc/php-fpm.d/www.conf
38 ;listen = /run/php-fpm/www.sock
39 listen = 127.0.0.1:9000
[root@redis64 ~]# systemctl  start php-fpm    # 启动服务
[root@redis64 ~]# netstat -utnlp | grep 9000    # 查看端口
tcp        0      0 127.0.0.1:9000          0.0.0.0:*               LISTEN      10477/php-fpm: mast 
[root@redis64 ~]#

测试配置

[root@redis64 ~]# cat /usr/local/nginx/html/test.php    # 编写php脚本    
<?php
$i = 100 ;
echo $i ;
echo "\n" ;
?>
[root@redis64 ~]# curl  http://localhost/test.php    # 访问php脚本
100

配置PHP支持redis

安装提供redis模块的软件

[root@redis64 ~]# tar -xf redis-cluster-4.3.0.tgz 
[root@redis64 ~]# ls
package.xml  redis-4.3.0  redis-cluster-4.3.0.tgz
[root@redis64 ~]# cd redis-4.3.0/
[root@redis64 redis-4.3.0]# ls
arrays.markdown    config.m4   INSTALL.markdown  README.markdown     redis.c           redis_session.c
cluster_library.c  config.w32  liblzf            redis_array.c       redis_cluster.c   redis_session.h
cluster_library.h  COPYING     library.c         redis_array.h       redis_cluster.h   tests
cluster.markdown   crc16.h     library.h         redis_array_impl.c  redis_commands.c
common.h           CREDITS     php_redis.h       redis_array_impl.h  redis_commands.h
[root@redis64 redis-4.3.0]# phpize    # 获取php版本信息 
Configuring for:
PHP Api Version:         20170718
Zend Module Api No:      20170718
Zend Extension Api No:   320170718
[root@redis64 redis-4.3.0]# ls
acinclude.m4       common.h      COPYING           ltmain.sh        redis_array_impl.c  redis_session.h
aclocal.m4         config.guess  crc16.h           Makefile.global  redis_array_impl.h  run-tests.php
arrays.markdown    config.h.in   CREDITS           missing          redis.c             tests
autom4te.cache     config.m4     INSTALL.markdown  mkinstalldirs    redis_cluster.c
build              config.sub    install-sh        php_redis.h      redis_cluster.h
cluster_library.c  configure     liblzf            README.markdown  redis_commands.c
cluster_library.h  configure.ac  library.c         redis_array.c    redis_commands.h
cluster.markdown   config.w32    library.h         redis_array.h    redis_session.c
[root@redis64 redis-4.3.0]# ls /usr/bin/php
php         php-cgi     php-config  phpize      
[root@redis64 redis-4.3.0]# ls /usr/bin/php-config 
/usr/bin/php-config
[root@redis64 redis-4.3.0]# cat /usr/bin/php-config
[root@redis64 redis-4.3.0]# ./configure --help | grep php
  --with-php-config=PATH  Path to php-config php-config
[root@redis64 redis-4.3.0]# ./configure --with-php-config=/usr/bin/php-config
----------------------------------------------------------------------

Build complete.
Don't forget to run 'make test'.

Installing shared extensions:     /usr/lib64/php/modules/
[root@redis64 redis-4.3.0]# ls /usr/lib64/php/modules/
bz2.so       ctype.so  exif.so      ftp.so      iconv.so  redis.so    tokenizer.so
calendar.so  curl.so   fileinfo.so  gettext.so  phar.so   sockets.so
[root@redis64 redis-4.3.0]# php -m | grep -i redis

调用模块

编写php脚本连接redis服务存储数据

存储数据脚本 s.php

查看数据脚本 g.php

[root@redis64 ~]# tar -xf redis-cluster-4.3.0.tgz 
[root@redis64 ~]# ls
package.xml  redis-4.3.0  redis-cluster-4.3.0.tgz
[root@redis64 ~]# cd redis-4.3.0/
[root@redis64 redis-4.3.0]# ls
arrays.markdown    config.m4   INSTALL.markdown  README.markdown     redis.c           redis_session.c
cluster_library.c  config.w32  liblzf            redis_array.c       redis_cluster.c   redis_session.h
cluster_library.h  COPYING     library.c         redis_array.h       redis_cluster.h   tests
cluster.markdown   crc16.h     library.h         redis_array_impl.c  redis_commands.c
common.h           CREDITS     php_redis.h       redis_array_impl.h  redis_commands.h
[root@redis64 redis-4.3.0]# phpize    # 获取php版本信息
Configuring for:
PHP Api Version:         20170718
Zend Module Api No:      20170718
Zend Extension Api No:   320170718
[root@redis64 redis-4.3.0]# ls
acinclude.m4       common.h      COPYING           ltmain.sh        redis_array_impl.c  redis_session.h
aclocal.m4         config.guess  crc16.h           Makefile.global  redis_array_impl.h  run-tests.php
arrays.markdown    config.h.in   CREDITS           missing          redis.c             tests
autom4te.cache     config.m4     INSTALL.markdown  mkinstalldirs    redis_cluster.c
build              config.sub    install-sh        php_redis.h      redis_cluster.h
cluster_library.c  configure     liblzf            README.markdown  redis_commands.c
cluster_library.h  configure.ac  library.c         redis_array.c    redis_commands.h
cluster.markdown   config.w32    library.h         redis_array.h    redis_session.c
[root@redis64 redis-4.3.0]# ls /usr/bin/php
php         php-cgi     php-config  phpize      
[root@redis64 redis-4.3.0]# ls /usr/bin/php-config 
/usr/bin/php-config
[root@redis64 redis-4.3.0]# cat /usr/bin/php-config
[root@redis64 redis-4.3.0]# ./configure --help | grep php
  --with-php-config=PATH  Path to php-config php-config
[root@redis64 redis-4.3.0]# ./configure --with-php-config=/usr/bin/php-config
----------------------------------------------------------------------

Build complete.
Don't forget to run 'make test'.

Installing shared extensions:     /usr/lib64/php/modules/
[root@redis64 redis-4.3.0]# ls /usr/lib64/php/modules/
bz2.so       ctype.so  exif.so      ftp.so      iconv.so  redis.so    tokenizer.so
calendar.so  curl.so   fileinfo.so  gettext.so  phar.so   sockets.so
[root@redis64 redis-4.3.0]# php -m | grep -i redis
[root@redis64 redis-4.3.0]# vim /etc/php.ini 
[root@redis64 redis-4.3.0]# php -m | grep -i redis
redis
[root@redis64 redis-4.3.0]# systemctl restart php-fpm.service 
[root@redis64 redis-4.3.0]# vim /usr/local/nginx/html/s.php
<?php
$redis = new redis();
$redis->connect("127.0.0.1", "6364");
$redis->auth("123456");
$redis->set("class","nsd2310");
echo "save ok\n";
?>

[root@redis64 redis-4.3.0]# redis-cli -h 127.0.0.1 -p 6364 -a 123456
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
127.0.0.1:6364> keys *
(empty list or set)
127.0.0.1:6364> exit
[root@redis64 redis-4.3.0]# curl http://localhost/s.php
save ok
[root@redis64 redis-4.3.0]# cat /usr/local/nginx/html/test.php 
<?php
$i = 100 ;
echo $i ;
echo "\n" ;
?>
[root@redis64 redis-4.3.0]# redis-cli -h 127.0.0.1 -p 6364 -a 123456
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
127.0.0.1:6364> keys *
1) "class"
127.0.0.1:6364> get class
"nsd2310"
127.0.0.1:6364> 
127.0.0.1:6364> exit
[root@redis64 redis-4.3.0]# vim /usr/local/nginx/html/g.php
[root@redis64 redis-4.3.0]# curl http://localhost/g.php
[root@redis64 redis-4.3.0]# cat /usr/local/nginx/html/g.php
<?php
$redis = new redis();
$redis->connect("127.0.0.1", "6364");
$redis->auth("123456");
echo $redis->get("class");
echo "\n";
?>


[root@redis64 redis-4.3.0]# vim /usr/local/nginx/html/g.php
[root@redis64 redis-4.3.0]# curl http://localhost/g.php
nsd2310
[root@redis64 redis-4.3.0]# redis-cli -h 127.0.0.1 -p 6364 -a 123456
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
127.0.0.1:6364> set class nsd2311
OK
127.0.0.1:6364> exit
[root@redis64 redis-4.3.0]# curl http://localhost/g.php
nsd2311
[root@redis64 redis-4.3.0]

部署redis集群给网站提供数据存储服务，解决如下问题

redis服务单点故障

数据的自动备份

数据存储的速度和存储不足的问题

准备6台redis服务器做集群

51 52 53 54 55 56

]# yum -y install redis    # 安装软件
]# vim  /etc/redis.conf    # 修改主配置文件夹
    92 port  6379    # 端口号
    69 bind   192.168.88.51    # IP地址
    838 cluster-enabled  yes    # 启用集群功能  
    846 cluster-config-file  nodes-6379.conf    # 存储集群信息文件
    852 cluster-node-timeout  5000    # 集群中主机通信超时时间
]# systemctl   start  redis
]# netstat -utnlp  | grep redis-serve
tcp  0  0 192.168.88.51:6379  0.0.0.0:*   LISTEN      21201/redis-serve  
tcp  0  0 192.168.88.51:16379   0.0.0.0:*   LISTEN   21201/redis-serve    # 集群端口

创建集群

在 51～56 任意一台服务器上执行创建集群的命令都可以

--cluster-replicas 1 给每个master服务器分配一台slave服务器，每个主至少要分配1台slave服务器，不然无法实现redis服务的高可用

创建集群时，会自动创建主从角色，默认把主机列表中的前3台服务器创建为Master角色的redis服务器，剩下的均配置为slave角色服务器

创建集群时，会自动给master角色的主机分配hash槽，通过hash槽实现数据的分布式存储

查看命令帮助

[root@Host51 ~]# redis-cli --cluster help

创建集群

[root@Host51 ~]# redis-cli --cluster create 192.168.88.51:6379 192.168.88.52:6379 192.168.88.53:6379 192.168.88.54:6379 192.168.88.55:6379 192.168.88.56:6379 --cluster-replicas 1
>>> Performing hash slots allocation on 6 nodes...
Master[0] -> Slots 0 - 5460
Master[1] -> Slots 5461 - 10922
Master[2] -> Slots 10923 - 16383
Adding replica 192.168.88.54:6379 to 192.168.88.51:6379
Adding replica 192.168.88.55:6379 to 192.168.88.52:6379
Adding replica 192.168.88.56:6379 to 192.168.88.53:6379
M: 0ceaf74c80061a9cf8075ebae1361ae579f113bd 192.168.88.51:6379
   slots:[0-5460] (5461 slots) master
M: beedff7f08f050499112d7b032ebdcc991dcaeab 192.168.88.52:6379
   slots:[5461-10922] (5462 slots) master
M: 0b2841b7fdb173b3f74bf5a75d01ef31ae451e07 192.168.88.53:6379
   slots:[10923-16383] (5461 slots) master
S: 0e2e8ea308d98961c6277dd772d3fce9730333ca 192.168.88.54:6379
   replicates 0ceaf74c80061a9cf8075ebae1361ae579f113bd
S: f6ac666e65d328b1950cd7665a6dc64aadf5c3ac 192.168.88.55:6379
   replicates beedff7f08f050499112d7b032ebdcc991dcaeab
S: 91d50cfc022f607ef11944e406028ba7cfba459c 192.168.88.56:6379
   replicates 0b2841b7fdb173b3f74bf5a75d01ef31ae451e07
Can I set the above configuration? (type 'yes' to accept): yes
>>> Nodes configuration updated
>>> Assign a different config epoch to each node
>>> Sending CLUSTER MEET messages to join the cluster
Waiting for the cluster to join
...
>>> Performing Cluster Check (using node 192.168.88.51:6379)
M: 0ceaf74c80061a9cf8075ebae1361ae579f113bd 192.168.88.51:6379
   slots:[0-5460] (5461 slots) master
   1 additional replica(s)
M: 0b2841b7fdb173b3f74bf5a75d01ef31ae451e07 192.168.88.53:6379
   slots:[10923-16383] (5461 slots) master
   1 additional replica(s)
S: 91d50cfc022f607ef11944e406028ba7cfba459c 192.168.88.56:6379
   slots: (0 slots) slave
   replicates 0b2841b7fdb173b3f74bf5a75d01ef31ae451e07
S: 0e2e8ea308d98961c6277dd772d3fce9730333ca 192.168.88.54:6379
   slots: (0 slots) slave
   replicates 0ceaf74c80061a9cf8075ebae1361ae579f113bd
M: beedff7f08f050499112d7b032ebdcc991dcaeab 192.168.88.52:6379
   slots:[5461-10922] (5462 slots) master
   1 additional replica(s)
S: f6ac666e65d328b1950cd7665a6dc64aadf5c3ac 192.168.88.55:6379
   slots: (0 slots) slave
   replicates beedff7f08f050499112d7b032ebdcc991dcaeab
[OK] All nodes agree about slots configuration.
>>> Check for open slots...                                                                               
>>> Check slots coverage...
[OK] All 16384 slots covered.

查看统计信息

[root@Host51 ~]# redis-cli --cluster info 192.168.88.52:6379
192.168.88.52:6379 (beedff7f...) -> 0 keys | 5462 slots | 1 slaves.
192.168.88.53:6379 (0b2841b7...) -> 0 keys | 5461 slots | 1 slaves.
192.168.88.51:6379 (0ceaf74c...) -> 0 keys | 5461 slots | 1 slaves.
[OK] 0 keys in 3 masters.
0.00 keys per slot on average.

查看详细信息

[root@Host51 ~]# redis-cli --cluster check 192.168.88.52:6379
192.168.88.52:6379 (beedff7f...) -> 0 keys | 5462 slots | 1 slaves.
192.168.88.53:6379 (0b2841b7...) -> 0 keys | 5461 slots | 1 slaves.
192.168.88.51:6379 (0ceaf74c...) -> 0 keys | 5461 slots | 1 slaves.
[OK] 0 keys in 3 masters.
0.00 keys per slot on average.                                                                            
>>> Performing Cluster Check (using node 192.168.88.52:6379)
M: beedff7f08f050499112d7b032ebdcc991dcaeab 192.168.88.52:6379
   slots:[5461-10922] (5462 slots) master
   1 additional replica(s)
M: 0b2841b7fdb173b3f74bf5a75d01ef31ae451e07 192.168.88.53:6379
   slots:[10923-16383] (5461 slots) master
   1 additional replica(s)
S: 0e2e8ea308d98961c6277dd772d3fce9730333ca 192.168.88.54:6379
   slots: (0 slots) slave
   replicates 0ceaf74c80061a9cf8075ebae1361ae579f113bd
S: 91d50cfc022f607ef11944e406028ba7cfba459c 192.168.88.56:6379
   slots: (0 slots) slave
   replicates 0b2841b7fdb173b3f74bf5a75d01ef31ae451e07
S: f6ac666e65d328b1950cd7665a6dc64aadf5c3ac 192.168.88.55:6379
   slots: (0 slots) slave
   replicates beedff7f08f050499112d7b032ebdcc991dcaeab
M: 0ceaf74c80061a9cf8075ebae1361ae579f113bd 192.168.88.51:6379
   slots:[0-5460] (5461 slots) master
   1 additional replica(s)
[OK] All nodes agree about slots configuration.
>>> Check for open slots...                                                                               
>>> Check slots coverage...
[OK] All 16384 slots covered.

查看保存集群信息

[root@Host51 ~]# cat /var/lib/redis/nodes-6379.conf 
0ceaf74c80061a9cf8075ebae1361ae579f113bd 192.168.88.51:6379@16379 myself,master - 0 1705887242000 1 connected 0-5460
0b2841b7fdb173b3f74bf5a75d01ef31ae451e07 192.168.88.53:6379@16379 master - 0 1705887242000 3 connected 10923-16383
91d50cfc022f607ef11944e406028ba7cfba459c 192.168.88.56:6379@16379 slave 0b2841b7fdb173b3f74bf5a75d01ef31ae451e07 0 1705887242129 6 connected
0e2e8ea308d98961c6277dd772d3fce9730333ca 192.168.88.54:6379@16379 slave 0ceaf74c80061a9cf8075ebae1361ae579f113bd 0 1705887242630 4 connected
beedff7f08f050499112d7b032ebdcc991dcaeab 192.168.88.52:6379@16379 master - 0 1705887241528 2 connected 5461-10922
f6ac666e65d328b1950cd7665a6dc64aadf5c3ac 192.168.88.55:6379@16379 slave beedff7f08f050499112d7b032ebdcc991dcaeab 0 1705887241628 5 connected
vars currentEpoch 6 lastVoteEpoch 0

使用数据库命令查看集群信息

[root@Host51 ~]# redis-cli -h 192.168.88.52
192.168.88.52:6379> cluster info
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6
cluster_size:3
cluster_current_epoch:6
cluster_my_epoch:2
cluster_stats_messages_ping_sent:1158
cluster_stats_messages_pong_sent:1162
cluster_stats_messages_meet_sent:5
cluster_stats_messages_sent:2325
cluster_stats_messages_ping_received:1162
cluster_stats_messages_pong_received:1163
cluster_stats_messages_received:2325
192.168.88.52:6379>

测试集群

解决redis服务单点故障

master角色的主机宕机后对应的slave会自动升级为master

master角色的主机恢复后会自动做slave角色的主机

[root@Host51 ~]# redis-cli --cluster info 192.168.88.52:6379
192.168.88.52:6379 (beedff7f...) -> 0 keys | 5462 slots | 1 slaves.
192.168.88.53:6379 (0b2841b7...) -> 0 keys | 5461 slots | 1 slaves.
192.168.88.51:6379 (0ceaf74c...) -> 0 keys | 5461 slots | 1 slaves.
[OK] 0 keys in 3 masters.
0.00 keys per slot on average.

[root@Host53 ~]# systemctl stop redis
[root@Host53 ~]# ss -ntulp | grep redis-server
[root@Host53 ~]# 

[root@Host51 ~]# redis-cli --cluster info 192.168.88.52:6379
Could not connect to Redis at 192.168.88.53:6379: Connection refused
192.168.88.52:6379 (beedff7f...) -> 0 keys | 5462 slots | 1 slaves.
192.168.88.56:6379 (91d50cfc...) -> 0 keys | 5461 slots | 0 slaves.
192.168.88.51:6379 (0ceaf74c...) -> 0 keys | 5461 slots | 1 slaves.
[OK] 0 keys in 3 masters.
0.00 keys per slot on average.

[root@Host53 ~]# systemctl start redis
[root@Host53 ~]# ss -ntulp | grep redis-server
tcp   LISTEN 0      128    192.168.88.53:16379      0.0.0.0:*    users:(("redis-server",pid=818,fd=8))
tcp   LISTEN 0      128    192.168.88.53:6379       0.0.0.0:*    users:(("redis-server",pid=818,fd=6))

[root@Host51 ~]# redis-cli --cluster info 192.168.88.52:6379
192.168.88.52:6379 (beedff7f...) -> 0 keys | 5462 slots | 1 slaves.
192.168.88.56:6379 (91d50cfc...) -> 0 keys | 5461 slots | 1 slaves.
192.168.88.51:6379 (0ceaf74c...) -> 0 keys | 5461 slots | 1 slaves.
[OK] 0 keys in 3 masters.
0.00 keys per slot on average.
[root@Host51 ~]# redis-cli --cluster check 192.168.88.52:6379
192.168.88.52:6379 (beedff7f...) -> 0 keys | 5462 slots | 1 slaves.
192.168.88.56:6379 (91d50cfc...) -> 0 keys | 5461 slots | 1 slaves.
192.168.88.51:6379 (0ceaf74c...) -> 0 keys | 5461 slots | 1 slaves.
[OK] 0 keys in 3 masters.
0.00 keys per slot on average.
>>> Performing Cluster Check (using node 192.168.88.52:6379)
M: beedff7f08f050499112d7b032ebdcc991dcaeab 192.168.88.52:6379
   slots:[5461-10922] (5462 slots) master
   1 additional replica(s)
S: 0b2841b7fdb173b3f74bf5a75d01ef31ae451e07 192.168.88.53:6379
   slots: (0 slots) slave
   replicates 91d50cfc022f607ef11944e406028ba7cfba459c
S: 0e2e8ea308d98961c6277dd772d3fce9730333ca 192.168.88.54:6379
   slots: (0 slots) slave
   replicates 0ceaf74c80061a9cf8075ebae1361ae579f113bd
M: 91d50cfc022f607ef11944e406028ba7cfba459c 192.168.88.56:6379
   slots:[10923-16383] (5461 slots) master
   1 additional replica(s)
S: f6ac666e65d328b1950cd7665a6dc64aadf5c3ac 192.168.88.55:6379
   slots: (0 slots) slave
   replicates beedff7f08f050499112d7b032ebdcc991dcaeab
M: 0ceaf74c80061a9cf8075ebae1361ae579f113bd 192.168.88.51:6379
   slots:[0-5460] (5461 slots) master
   1 additional replica(s)
[OK] All nodes agree about slots configuration.
>>> Check for open slots...                                                                               
>>> Check slots coverage...
[OK] All 16384 slots covered.

数据的自动备份

slave角色主机自动同步master角色主机数据

数据分布式存储

连接集群存储的多个变量不是存储在一台redis服务里而是根据集群crc16 算法的计算结果存储数据根据算法的计算结果把数据分别存储在集群的master角色主机上

连接集群的命令

redis-cli -c -h 51～56的ip -p 6379

集群存储数据的工作过程

根据算法的计算结果把数据分别存储在集群的master角色主机上

编写php脚本连接集群

存储数据

[root@redis64 ~]# ss -ntulp | grep 80
[root@redis64 ~]# ss -ntulp | grep 9000
[root@redis64 ~]# php -m | grep -i redis
[root@redis64 ~]# vim /usr/local/nginx/html/s1.php
<?php
$redis_list = ['192.168.88.51:6379','192.168.88.52:6379','192.168.88.53:6379','192.168.88.54:6379','192.168.88.55:6379','192.168.88.56:6379'];
$client = new RedisCluster(NUll,$redis_list);
$client->set("i","tarenaA ");
$client->set("j","tarenaB ");
$client->set("k","tarenaC ");
echo "save ok\n";
?>

查询数据

[root@redis64 ~]# cp /usr/local/nginx/html/s1.php /usr/local/nginx/html/g1.php
[root@redis64 ~]# vim /usr/local/nginx/html/g1.php
<?php
$redis_list = ['192.168.88.51:6379','192.168.88.52:6379','192.168.88.53:6379','192.168.88.54:6379','192.168.88.55:6379','192.168.88.56:6379'];
$client = new RedisCluster(NUll,$redis_list);
echo $client->get("i");
echo $client->get("j");
echo $client->get("k");
?>
[root@redis64 ~]# curl http://localhost/s1.php
save ok
[root@redis64 ~]# curl http://localhost/g1.php
tarenaA tarenaB tarenaC [root@redis64 ~]#

连接redis集群主机查看存储的数据文章来源地址https://www.toymoban.com/news/detail-818632.html

[root@Host51 ~]# redis-cli --cluster info 192.168.88.51:6379
192.168.88.51:6379 (0ceaf74c...) -> 2 keys | 5461 slots | 1 slaves.
192.168.88.56:6379 (91d50cfc...) -> 1 keys | 5461 slots | 1 slaves.
192.168.88.52:6379 (beedff7f...) -> 2 keys | 5462 slots | 1 slaves.
[OK] 5 keys in 3 masters.
0.00 keys per slot on average.
[root@Host51 ~]# redis-cli -c -h 192.168.88.51 -p 6379
192.168.88.51:6379> keys *
1) "age"
2) "j"
192.168.88.51:6379> get j
"tarenaB "
192.168.88.51:6379> 
[root@Host51 ~]# redis-cli -c -h 192.168.88.52 -p 6379
192.168.88.52:6379> keys *
1) "name"
2) "k"
192.168.88.52:6379> get k
"tarenaC "
192.168.88.52:6379> 
[root@Host51 ~]# redis-cli -c -h 192.168.88.56 -p 6379
192.168.88.56:6379> keys *
1) "i"
192.168.88.56:6379> get i
"tarenaA "
192.168.88.56:6379>

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