linux搭建nacos集群

准备

检查是否安装jdk

[root@hao /usr/local/software/elk/logstash]# java -version
java version "1.8.0_341"
Java(TM) SE Runtime Environment (build 1.8.0_341-b10)
Java HotSpot(TM) 64-Bit Server VM (build 25.341-b10, mixed mode)

配置nacos

去github下载nacos：2.2.3:https://github.com/alibaba/nacos/tags

上传到linux的nacos文件夹并解压

[root@hao /usr/local/software/nacos]# tar -zxvf nacos-server-2.2.3.tar.gz
nacos/LICENSE
nacos/NOTICE
nacos/target/nacos-server.jar
nacos/conf/
nacos/conf/derby-schema.sql
nacos/conf/1.4.0-ipv6_support-update.sql
nacos/conf/application.properties.example
nacos/conf/nacos-logback.xml
nacos/conf/announcement.conf
nacos/conf/mysql-schema.sql
nacos/conf/cluster.conf.example
nacos/conf/application.properties
nacos/bin/startup.sh
nacos/bin/startup.cmd
nacos/bin/shutdown.sh
nacos/bin/shutdown.cmd
[root@hao /usr/local/software/nacos]# ls
nacos  nacos-server-2.2.3.tar.gz

改名为nacos_8848

[root@hao /usr/local/software/nacos]# mv nacos nacos_8848
[root@hao /usr/local/software/nacos]# ls
nacos_8848  nacos-server-2.2.3.tar.gz

复制两份分别为nacos_8858、nacos_8868

[root@hao /usr/local/software/nacos]# cp -r nacos_8848 nacos_8858
[root@hao /usr/local/software/nacos]# cp -r nacos_8848 nacos_8868
[root@hao /usr/local/software/nacos]# ls
nacos_8848  nacos_8858  nacos_8868  nacos-server-2.2.3.tar.gz

删除application.properties文件，把application.properties.example改为application.properties文件

[root@hao /usr/local/software/nacos]# cd nacos_8848/
[root@hao /usr/local/software/nacos/nacos_8848]# ls
bin  conf  LICENSE  NOTICE  target
[root@hao /usr/local/software/nacos/nacos_8848]# cd conf/
[root@hao /usr/local/software/nacos/nacos_8848/conf]# ls
1.4.0-ipv6_support-update.sql  application.properties          cluster.conf.example  mysql-schema.sql
announcement.conf              application.properties.example  derby-schema.sql      nacos-logback.xml
[root@hao /usr/local/software/nacos/nacos_8848/conf]# rm -rf application.properties
[root@hao /usr/local/software/nacos/nacos_8848/conf]# mv application.properties.example application.properties
[root@hao /usr/local/software/nacos/nacos_8848/conf]# ls
1.4.0-ipv6_support-update.sql  announcement.conf  application.properties  cluster.conf.example  derby-schema.sql  mysql-schema.sql  nacos-logback.xml

再修改application.properties文件

### Count of DB:
db.num=1

### Connect URL of DB:
db.url.0=jdbc:mysql://192.168.133.100:3306/nacos?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&useUnicode=true&useSSL=false&serverTimezone=Asia/Shanghai
db.user.0=root
db.password.0=123456

运行sql文件[解压文件夹下的conf/nacos-mysql.sql]

运行nacos：官网

启动：进入bin/文件夹下面

启动命令(standalone代表着单机模式运行，非集群模式):

sh startup.sh -m standalone

访问地址：http://192.168.133.100:8848/nacos，账号密码：nacos

SpringCloud-alibaba整合nacos作为配置中心

nacos作为项目的配置中心，替代config模块

新建命名空间

配置管理

新建配置

点击发布

SpringBoot整合SpringCloud-alibaba

配置文件bootstrap.yml、application.yml文件

spring:
  cloud:
    nacos:
      config:
        server-addr: 192.168.133.100:8848
        namespace: b4d78fc0-d403-43d0-b721-93375733c9d2
        name: smart-config
        group: dev
        file-extension: yaml
  application:
    name: smart-alibaba-nacos

server:
  port: 15360
logging:
  level:
    com.wnhz.smart.cloud.alibaba: debug

测试

package com.wnhz.smart.cloud.alibaba.nacos.controller;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author Hao
 * @date 2023-12-06 17:13
 */
@RestController
@RequestMapping("/api/nacos")
@RefreshScope
@Slf4j
public class NacosController {
   
    @Value("${name}")
    private String name;

    @GetMapping("ali")
    public String ali() {
   
        log.debug("读取nacos的配置数据：{}", name);
        return name;
    }
}

其中@RefreshScope注解是实时监控配置内容的变化

下面是启动一次程序，换了次配置文件的返回结果由xxx变为yyy

SpringCloud-alibaba整合nacos作为服务中心

为什么要使用集群

CAP，nacos实现了AP

配置nacos集群

进入/usr/local/software/nacos/nacos_8848/conf文件夹

把cluster.conf.example文件重命名为cluster.conf

[root@hao /usr/local/software/nacos/nacos_8848/conf]# ls
1.4.0-ipv6_support-update.sql  announcement.conf  application.properties  cluster.conf.example  derby-schema.sql  mysql-schema.sql  nacos-logback.xml
[root@hao /usr/local/software/nacos/nacos_8848/conf]# mv cluster.conf.example cluster.conf

编辑cluster.conf文件

[root@hao /usr/local/software/nacos/nacos_8848/conf]# vim cluster.conf

进入/nacos_8858/conf修改application.properties文件和cluster.conf文件，同上

分别启动8848和8858

[root@hao /usr/local/software/nacos/nacos_8848/bin]# ./startup.sh
[root@hao /usr/local/software/nacos/nacos_8858/bin]# ./startup.sh

进入网页：http://192.168.133.100:8848/nacos

成功

配置一键启动脚本

startup.sh

echo "准备开启nacos服务集群..."

#调用启动nacos的脚本
/usr/local/software/nacos/nacos_8848/bin/startup.sh
/usr/local/software/nacos/nacos_8858/bin/startup.sh

shutdown.sh

echo "准备关闭nacos服务集群..."

#调用启动nacos的脚本
/usr/local/software/nacos/nacos_8848/bin/shutdown.sh
/usr/local/software/nacos/nacos_8858/bin/shutdown.sh

restart.sh

echo "准备重启nacos服务集群..."

#调用关闭、启动nacos的脚本
/usr/local/software/nacos/nacos_8848/bin/shutdown.sh
/usr/local/software/nacos/nacos_8858/bin/shutdown.sh
/usr/local/software/nacos/nacos_8848/bin/startup.sh
/usr/local/software/nacos/nacos_8858/bin/startup.sh

3个文件给777权限

完成

实现负载均衡

删除docker的nginx容器

修改nginx.conf文件

user  nginx;
worker_processes  auto;
error_log  /var/log/nginx/error.log notice;
pid        /var/run/nginx.pid;
events {
    worker_connections  1024;
}
stream {
   #loadBlance is here
    upstream nacos-tcp{
      server 192.168.201.107:9848;
      server 192.168.201.107:9858;
    }
    #server  code is here....
    server {
      listen 8777;
      proxy_pass     nacos-tcp;
    }
}
http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
    access_log  /var/log/nginx/access.log  main;
    sendfile        on;
    #tcp_nopush     on;
    keepalive_timeout  65;
    #gzip  on;
    #loadBlance is here
    upstream nacos-http{
      server 192.168.201.107:8848;
      server 192.168.201.107:8858;
    }
    #server  code is here....
    server {
      keepalive_requests 120;
      listen 7777;
      location /{
         proxy_pass             http://nacos-http;
         proxy_redirect         off;
      }
    }
    include /etc/nginx/conf.d/*.conf;
}

创建新容器

docker run -it \
--name nginx \
-p 8075:80 \
-p 8080:8080 \
-p 7777:7777 \
-p 8777:8777 \
--privileged=true \
--network wn_docker_net \
--ip 172.18.12.90 \
-v /etc/localtime:/etc/localtime \
-v /usr/local/software/nginx/conf/nginx.conf:/etc/nginx/nginx.conf \
-v /usr/local/software/nginx/conf/conf.d:/etc/nginx/conf.d \
-v /usr/local/software/nginx/html:/usr/share/nginx/html \
-v /usr/local/software/nginx/logs:/var/log/nginx \
-d nginx

访问地址：http://192.168.133.100:7777/nacos

idea中的bootstrap.yml文件中修改ip和端口

启动idea，查看是否成功

完成