MyCat实战--读写分离/数据分片/mycat集群/haproxy负载均衡

港控/mmm° 2023-10-07 08:23 4阅读 0赞

**目录**

--------------------

简介

优势

关键特性

读写分离

安装mycat

配置mycat

server.xml

schema.xml

rule.xml

启动mycat

停止mycat

连接mycat

测试

数据分片

配置master

配置slave

创建数据库以及表

配置mycat

schema.xml

rule.xml

测试

MyCat集群

架构

搭建多节点mycat

连接测试

负载均衡

简介

架构

部署安装HAProxy

docker安装

配置文件

启动docker haproxy容器

访问ip:4001/dbs

Navicat连接haproxy

--------------------

## 简介 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70][]

![20200118212358932.png][]

## 优势 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 1][]

## 关键特性 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 2][]

## 读写分离 ##

![20200118215155295.png][]

### 安装mycat ###

![20200118215254851.png][]

### 配置mycat ###

#### server.xml ####

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 3][]

#### schema.xml ####

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 4][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 5][]

#### rule.xml ####

![20200118215908273.png][]

### 启动mycat ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 6][]

> 启动mycat的命令是 **./startup\_nowrap.sh**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 7][]

### 停止mycat ###

![20200118220333566.png][]

### 连接mycat ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 8][]

### 测试 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 9][]

## 数据分片 ##

> 比如两台服务器节点，来了4条数据，两个节点的写库各插入2条，这就是分片。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 10][]

### 配置master ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 11][]

### 配置slave ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 12][]

### 创建数据库以及表 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 13][]

![20200118215021644.png][]

### 配置mycat ###

#### schema.xml ####

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 14][]

#### rule.xml ####

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 15][]

### 测试 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 16][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 17][]

## MyCat集群 ##

> mycat做了数据库的代理，在高并发的情况下，必然也会面临单节点的性能问题，所以需要部署多个mycat节点。

### 架构 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 18][]

### 搭建多节点mycat ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 19][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 20][]

### 连接测试 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 21][]

> 虽然搭建了多节点的mycat集群，但是又面临应用程序需要连接2个节点的mycat，又会变复杂了，这时需要对mycat进行负载均衡配置。

## 负载均衡 ##

> 在前面的架构中，虽然对mycat做了集群，保障了mycat的可靠性，但是，应用程序需要连接多个mycat，显然不是很友好的，也就是说缺少负载均衡的组件，接下来我们来了解下HAProxy。

### 简介 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 22][]

### 架构 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 23][]

### 部署安装HAProxy ###

#### docker安装 ####

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 24][]

#### 配置文件 ####

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 25][]

#### 启动docker haproxy容器 ####

![20200119093222593.png][]

#### 访问ip:4001/dbs ####

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 26][]

#### ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 27][] Navicat连接haproxy ####

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 28][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 29][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 30][]

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