Laravel project uses twemproxy to deploy the complete steps of redis cluster php instance

Twemproxy is a proxy server that can reduce the number of connections opened by the Memcached or Redis server. The following article mainly introduces you to the relevant information about the Laravel project using twemproxy to deploy the redis cluster. The article introduces it in detail through the sample code. Friends in need can refer to it

Preface

twemproxy is a redis proxy proxy developed by Twitter. Twemproxy can use multiple redis servers as one. When developers access these redis servers through twemproxy, they don’t have to worry about which one to go to. A redis server reads k-v data or updates k-v data into the data set, which also solves the problem of redis sharing among multiple servers. With the help of redis's master-slave replication, it can be guaranteed that even if any redis fails to work, an entire data set can still be guaranteed to exist.

What is Twemproxy used for? It can:

• Reduce the number of cache server connections through proxy

• Automatically share data among multiple cache servers

• Support consistent hashing through different strategies and hashing functions

• Disable failed nodes through configuration

• Run on multiple instances, the client can connect to the first available proxy server

• Supports streaming and batch processing of requests, thus reducing round-trip consumption

The following introduces the installation and configuration of twemproxy:

1. You need to install m4 before installing twemproxy , autoconf, automake, libtool, gcc, otherwise various errors will be reported

Install m4

wget http://mirrors.kernel.org/gnu/m4/m4-1.4.13.tar.gz
&& tar -xzvf m4-1.4.13.tar.gz
&& cd m4-1.4.13
&& ./configure –prefix=/usr/local 
make && make install

Install autoconf, automake, libtool, gcc

yum -y install autoconf automake libtool gcc

2. Install twemproxy

git clone https://github.com/twitter/twemproxy.git
autoreconf -fvi #生成configure文件
.configure
make && make install

3. Edit the configuration file

vim conf/nutcracker.yml

alpha:
 listen: 127.0.0.1:22121 #监听端口
 hash: fnv1a_64  #key值hash算法，默认fnv1a_64
 distribution: ketama  #分布算法 
#ketama一致性hash算法；modula非常简单，就是根据key值的hash值取模；random随机分布
 auto_eject_hosts: true  #摘除后端故障节点 
 redis: true   #是否是redis缓存，默认是false
 timeout: 400   #代理与后端超时时间，毫秒
 server_retry_timeout: 200000 #摘除故障节点后重新连接的时间，毫秒
 server_failure_limit: 1  #故障多少次摘除
 servers:
 - 172.16.175.145:6379:1 
 - 172.16.175.122:6379:1

4. Change the redis configuration file

The IP and port monitored by redis must correspond to twemproxy (because I only installed twemproxy on one of the machines, if it is installed on both machines, there is no need to change it. )

Change the bind option in redis.conf of the two servers respectively, change 127.0.0.1 to 172.16.175.145 and 172.16.175.122 in this example

5. Turn on twemproxy

nutcracker -t -c /twemproxy/conf/nutcracker.yml 
#测试配置文件 如果不加-c 默认是检测conf/nutcracker.yml

nutcracker -d -c /twemproxy/conf/nutcracker.yml -p -o /data/logs/twemproxy/redisproxy.log 
#启动并将日志记录到/data/logs/twemproxy/redisproxy.log

6. Change the redis connection in the project to twemproxy ip and port

My project uses laravel, just set the REDIS_HOST and REDIS_PORT in the .env to 127.0.0.1 and 22121

Note that you also need to set the config Comment out 'database' => 0 in the redis configuration in database.php under the folder. Predis will perform a select operation on this configuration by default, which will cause a connection error.

Do a redis read and write test. If nothing unexpected happens, twemproxy can be used normally!

Summary

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