生产可用的Nacos集群

搭建生产可用的Nacos集群

软件包其中有JDK安装包
链接：https://pan.baidu.com/s/1QiWfPZVCg-kEmysfNSzHCg
提取码：virc

搭建方案

简介

生产环境中部署nacos需要使用集群模式cluster保证高可用，本文主要详细介绍如何搭建搭建生产可用的Nacos集群

• nacos采用raft协议实现集群，有leader的概念
  

主机规划

mysql

节点	端口
59.110.164.254	3306

nacos集群

节点	端口
192.168.235.130	8848
192.168.235.131	8848
192.168.235.132	8848

nacos集群中，每台机器安装JDK
jdk安装步骤

1.将下载好的jdk跟maven上传到服务器上
2.解压jdk到/usr/local/
tar -zxvf jdk-8u91-linux-x64.tar.gz -C /usr/local/
3.配置环境变量
vi /etc/profile
在最下面，按i进入insert模式，添加一下内容
JAVA_HOME=/usr/local/jdk1.8.0_91
export JAVA_HOME
CLASSPATH=.:$JAVA_HOME/lib
export CLASSPATH
PATH=$PATH:$JAVA_HOME/bin:$CLASSPATH
export PATH
按esc进入命令行模式，再按:wq保存退出
4.激活配置
source /etc/profile

openresty集群

节点	端口
192.168.235.133	80
192.168.235.134	80

VIP

192.168.235.135

准备阶段

mysql中新建数据库nacos，导入初始化脚本，本文采用单节点部署mysql方式，为了快速部署nacos集群，生产环境选用Galera mysql集群方式部署。

找到 conf/nacos-mysql.sql ，将其导入到数据库中。
导入后查看数据库

192.168.235.130

• 创建目录

mkdir /app

• 将文章顶部百度网盘中的文件上传到 192.168.235.130中的/app目录
  

• 修改application.properties文件，最后部分增加如下配置

   spring.datasource.platform=mysql
   db.num=1
   db.url.0=jdbc:mysql://59.110.164.254:3306/nacos?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true
   db.user=root
   db.password=root

• 修改cluster.conf文件，nacos集群的三台主机信息

    ip:port
    192.168.235.130:8848
    192.168.235.131:8848
    192.168.235.132:8848

• 启动

    cd /app/nacos-server/bin 
    ./startup.sh 

• 查看启动情况

tail -f /app/nacos-server/logs/start.out

192.168.235.131和192.168.235.132同理搭建

192.168.235.133

• OpenResty安装

●Centos:yum install -y readline-devel pcre-devel openssl-devel gcc GeoIP-devel
●wget  https://openresty.org/download/openresty-1.11.2.1.tar.gz
●tar -zxvf openresty-1.11.2.1.tar.gz
●cd openresty-1.11.2.1
●./configure --with-luajit --with-pcre --with-http_gzip_static_module --with-http_realip_module --with-http_geoip_module --with-http_ssl_module --with-http_stub_status_module --prefix=/app/openresty
●make && make install

• 安装完成
  

• OpenResty配置/app/openresty/nginx/conf/nginx.conf

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       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  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    upstream nacosCluster {
      server 192.168.235.130:8848;
      server 192.168.235.131:8848;
      server 192.168.235.132:8848;
    }

    server {
       listen 80;

       server_name nacostest.com;

       location / {
          proxy_pass http://nacosCluster;
       }
    }


}
~

• OpenResty启动

cd /app/openresty/nginx/sbin
./nginx 

• 验证
  http://192.168.235.133/nacos
  用户名/密码 nacos nacos
  

192.168.235.134 同理

192.168.235.133

• 安装keepalived

yum install -y net-tools psmisc  net-snmp ipvsadm keepalived

• 安装killall命令

yum install psmisc -y

• 配置执行脚本
  vi /etc/keepalived/check_nginx.sh

!/bin/bash

count=$(ps -ef |grep nginx |egrep -cv "grep|$$")

if [ "$count" -eq 0 ];then
    killall keepalived
fi

chmod +x /etc/keepalived/check_nginx.sh

• 配置/etc/keepalived/keepalived.conf，vip 192.168.235.135

! Configuration File for keepalived

global_defs {
   # 陆脫脮始镁碌脴路
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   # 脫录镁路垄脣碌脴路
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id NGINX_MASTER
}

vrrp_script check_nginx {
    script "/etc/keepalived/check_nginx.sh"
}

vrrp_instance VI_1 {
    state MASTER
    interface ens33
    virtual_router_id 51 # VRRP 路脫 ID实脌拢卢每赂枚媒禄碌脛
    priority 100    # 脫脧录露拢卢卤赂路镁脦脝脡脰 90
    advert_int 1    # 指露篓VRRP 脨脤掳眉盲时录洌��兟
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.235.135/24
    }
    track_script {
        check_nginx
    }
}

• 启动keepalived

service keepalived start
service keepalived status

• 查看虚拟VIP
  

192.168.235.134 同理