SpringCloud-2.0-周阳（20.Nacos 集群和持久化配置）

Bertha 。 2023-09-28 12:19 10阅读 0赞

[上一篇 ：19. 分布式配置中心 - Nacos][_19. _ - Nacos]

[下一篇 ：21. Sentinel 环境搭建][_21. Sentinel]

*  **声明：原文作者：csdn：yuan\_404**

### 文章目录 ###

*  1 . 概述
 *   *  1.1 集群架构图
     *  1.2 数据存储
 *  2 . Nacos 持久化配置
 *   *  2.1 说明
     *  2.2 切换为 MySql
 *  3 . Linux 版 Nacos+MySQL 生产环境配置
 *   *  3.1 Linux 配置 Nacos
     *  3.2 集群配置
     *   *  1 . Linux 上 Mysql 数据库配置
         *  2 . application.properties配置
         *  3 . nacos的集群配置
         *  4 . 编辑Nacos的启动脚本startup.sh
         *  5 . 配置 Nginx 作为负载均衡器
         *  6 . 启动集群
         *  7 . 测试环境是否搭建成功
         *  8 . 与项目整合

# 1 . 概述 #

*  官方文档 ：[https://nacos.io/zh-cn/docs/cluster-mode-quick-start.html][https_nacos.io_zh-cn_docs_cluster-mode-quick-start.html]

## 1.1 集群架构图 ##

*  集群架构图  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70][]
 *  对上图的理解  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 1][]

## 1.2 数据存储 ##

*  当我们重启 Nacos 后发现，之前配置的信息还都存在。
 *  其实 Nacos 默认使用**嵌入式数据库**（**derby**）实现数据的存储。
 *  所以，如果启动多个默认配置下的 Nacos 节点，数据存储是存在一致性问题的。
 *  为了解决这个问题，Nacos 采用了**集中式存储**的方式来支持集群化部署，目前只支持 **MySQL** 的存储。  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 2][]
 *  配置过后，再启动 Nacos 所有数据都会写入 MySql 中

# 2 . Nacos 持久化配置 #

## 2.1 说明 ##

*  Nacos默认自带的是嵌入式数据库derby
 *  查看源码 POM 文件  
    ![20201219154415683.png][]

## 2.2 切换为 MySql ##

1.  在本地 Nacos 的目录 —— \\ nacos \\ conf 下找到sql脚本
    
    nacos-mysql.sql  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 3][]
2.  使用 MySql 执行该脚本  
    ![20201219155003231.png][]
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 4][]
    
    ![20201219155109471.png][]
3.  在本地 Nacos 的目录 —— \\ nacos \\ conf 下找到 application.properties  
    ![20201219155304313.png][]
4.  按照官网要求对该文件进行修改
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 5][]
    
    添加上如下代码（数据库的用户名、密码信息写自己的）
    
        ########## 修改 Nacos 数据库 ##########
        spring.datasource.platform=mysql
         
        db.num=1
        db.url.0=jdbc:mysql://localhost:3306/nacos_config?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true
        db.user=root
        db.password=123456
    
    说明 ：这里的 MYSQL 必须为 5.7 版本  
    如果一定要配置 MYSQL 8.0 可以参考 ：[https://blog.csdn.net/qq\_40885085/article/details/107366137][https_blog.csdn.net_qq_40885085_article_details_107366137]
5.  重启 Nacos  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 6][]

# 3 . Linux 版 Nacos+MySQL 生产环境配置 #

*  目标 ：搭建 1个Nginx 、3个Nacos、1个Mysql
 *  因为这里的重点是 Nacos 的使用，所以其他两个就不演示集群了

## 3.1 Linux 配置 Nacos ##

*  官网说明  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 7][]

1.  去官网下载 Nacos Linux 版本
    
    Github 下载地址 ：[https://github.com/alibaba/nacos/releases/tag/1.1.4][https_github.com_alibaba_nacos_releases_tag_1.1.4]  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 8][]
2.  打开 Linux，并将下载的文件传到 /opt 目录下
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 9][]
    
    ![20201219175648796.png][]
3.  解压该文件
    
        tar -zxvf nacos-server-1.1.4.tar.gz
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 10][]
4.  进入解压后的文件夹
    
    ![20201219180837968.png][]

## 3.2 集群配置 ##

### 1 . Linux 上 Mysql 数据库配置 ###

1.  利用 Navicat for Mysql 连接 Linux 服务器上的 Mysql  
    ![20201219213848947.png][]
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 11][]
2.  运行 Nacos 中 nacos-mysql.sql 脚本  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 12][]
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 13][]

### 2 . application.properties配置 ###

1.  进入 nacos/conf  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 14][]
2.  先复制一份备份
    
        cp application.properties application.properties.bk
    
    ![20201219215019855.png][]
3.  编辑 application.propertie
    
        vim application.propertie
    
        ########## 修改 Nacos 数据库 ##########
        spring.datasource.platform=mysql
         
        db.num=1
        db.url.0=jdbc:mysql://localhost:3306/nacos_config?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true
        db.user=root
        db.password=123456
4.  保存退出

### 3 . nacos的集群配置 ###

*  这里需要配 3 台 Nacos
 *  修改配置文件 cluster.conf

1.  进入 nacos/conf
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 15][]
2.  复制出一，并命名为 ：cluster.conf
    
        cp cluster.conf.example cluster.conf
    
    ![20201219215847165.png][]
3.  查看本机的 IP
    
        hostname -i
    
    ![20201219220329117.png][]
4.  编写 cluster.conf
    
    前缀 IP 必须为上一步查到的 IP 地址
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 16][]
5.  保存退出

### 4 . 编辑Nacos的启动脚本startup.sh ###

*  之前在 Windows 中单机版本的 Nacos 直接使用 startup.cmd 就可以启动，并端口号为 8848
 *  但是上一步，我们配置了三台 Nacos，使用 startup.sh 脚本，不知道启动的是哪一台，所以需要配置指明

1.  进入 nacos/bin  
    ![20201219220956121.png][]
2.  复制一份 startup.sh
    
        cp startup.sh startup.sh.bk
    
    ![20201219221152358.png][]
3.  编辑 startup.sh
    
    第一处：  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 17][]
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 18][]
    
    第二处 ：
    
    ![20201219221901518.png][]
    
    ![20201219222236709.png][]
4.  保存退出

### 5 . 配置 Nginx 作为负载均衡器 ###

1.  进入 /usr/local/nginx/conf  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 19][]
2.  复制 nginx.conf 备份
    
        cp nginx.conf nginx.conf.bk
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 20][]
3.  编辑 nginx.conf
    
        vim nginx.conf
    
        # 配置 Nacos 集群
        upstream cluster{
              
            server 127.0.0.1:3333;
            server 127.0.0.1:4444;
            server 127.0.0.1:5555;
        }
    
        proxy_pass http://cluster;
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 21][]
4.  保存退出
5.  进入 /usr/local/nginx/sbin/ 目录
    
        cd /usr/local/nginx/sbin/
    
    ![20201220091129440.png][]

### 6 . 启动集群 ###

1.  使用刚刚修改的配置文件启动 Nginx
    
        ./nginx -c /usr/local/nginx/conf/nginx.conf
2.  进入 Nacos 的 bin 目录  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 22][]
3.  启动 Nacos 集群
    
    启动 3333、4444、5555
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 23][]
4.  查看 Nacos 的启动情况
    
    查看所有 Nacos 进程的具体情况
    
        ps -ef|grep nacos
    
    统计 Nacos 进程的数量
    
        ps -ef|grep nacos|grep -v grep | wc -l
    
    ![2020122009290313.png][]
5.  查看 Nginx 的状态，以确定开启
    
        ps -ef|grep nginx
    
    ![20201220110432122.png][]
6.  关闭防火墙
    
        systemctl stop firewalld
7.  查看防火墙状态确保关闭
    
        systemctl status firewalld
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 24][]

### 7 . 测试环境是否搭建成功 ###

1.  网页访问 Nacos （Linux、Windows 都可）
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 25][]
2.  新建配置  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 26][]
3.  查看 Linux 数据库

*  我这里使用 Navicat 连接了 Linux 数据库，直接查看
 *  也可以用命令行  
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 27][]

### 8 . 与项目整合 ###

*  将微服务 alibaba-nacos-provider-payment-9001 启动、注册进 Nacos 集群

1.  修改 application.yml
    
        server-addr: 192.168.142.120:1111 # Linux + Nginx 集群版
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQ0OTgzOA_size_16_color_FFFFFF_t_70 28][]
2.  启动 alibaba-nacos-provider-payment-9001
3.  查看 Nacos 控制台  
    ![2020122011312287.png][]
    
    成功  
    其他的配置就都是一样的了，就不演示了。

[_19. _ - Nacos]: https://blog.csdn.net/Mango_Bin/article/details/125475316
[_21. Sentinel]: https://blog.csdn.net/Mango_Bin/article/details/125475439
[https_nacos.io_zh-cn_docs_cluster-mode-quick-start.html]: https://nacos.io/zh-cn/docs/cluster-mode-quick-start.html
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[20201219154415683.png]: https://img-blog.csdnimg.cn/20201219154415683.png
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[20201219155003231.png]: https://img-blog.csdnimg.cn/20201219155003231.png
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[20201219155109471.png]: https://img-blog.csdnimg.cn/20201219155109471.png
[20201219155304313.png]: https://img-blog.csdnimg.cn/20201219155304313.png
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[https_blog.csdn.net_qq_40885085_article_details_107366137]: https://blog.csdn.net/qq_40885085/article/details/107366137
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[https_github.com_alibaba_nacos_releases_tag_1.1.4]: https://github.com/alibaba/nacos/releases/tag/1.1.4
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[20201219175648796.png]: https://img-blog.csdnimg.cn/20201219175648796.png
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