1.环境准备

nacos 的官方地址

文档手册
https://nacos.io/zh-cn/index.html
下载页面
https://github.com/alibaba/nacos/releases

由于服务器资源有限，方便测试，我主要采用2台centos云服务器，并且已经具备docker swarm环境（搭建参见 docker swarm环境），来搭建4个节点的nacos集群服务：

两台服务器，每台分别部署两个nacos节点，IP及端口如下：

        192.168.62.15:9851
        192.168.62.15:9850
        192.168.62.37:9848
        192.168.62.37:9849

集群需要mysql数据库环境支持，脚本conf/nacos-mysql.sql。

同时4个节点通过nginx通过对外服务，nginx搭建请参考其他文件，nginx配置在后面会给出。

2.docker-cluster.yml文件

通过swarm集群，配置好docker-compose文件内容，自动部署到不同的docker节点

version: '3.7'

services:
  nacos_cluster_1:
    container_name: nacos_cluster_1
    image: nacos/nacos-server:1.2.0
    restart: always
    ports:
      - target: 9848
        published: 9848
        protocol: tcp
        mode: host  #采用host模式（默认为ingress，配置较灵活，根据自己的需求也可调整为ingress，本案例防止nacos 采用 swarm集群调度，所以改为host模式，两台服务器之间通过内网及nacos端口访问，通过nginx配置对外服务）
    volumes:
      - cluster1_logs:/home/nacos/logs  #配置docker存储日志的卷
    environment:
      PREFER_HOST_MODE: ip
      NACOS_SERVERS: 192.168.62.37:9848 192.168.62.37:9849 192.168.62.15:9850 192.168.62.15:9851
      NACOS_SERVER_IP: 192.168.62.37
      NACOS_SERVER_PORT: 9848
      NACOS_AUTH_ENABLE: 'true'     #1.2.0版本默认关闭登陆界面
      MYSQL_SERVICE_HOST: 192.168.62.37
      MYSQL_SERVICE_DB_NAME: nacos_devtest
      MYSQL_SERVICE_PORT: 23306
      MYSQL_SERVICE_USER: nacos
      MYSQL_SERVICE_PASSWORD: 123456
    deploy:
      replicas: 1       #部署时，指定部署一个副本
      placement:
        constraints:
          - node.labels.env==docker-server-1  #根据标签指定部署到的节点，标签需要自己事先配置好（本案例节点docker-server-1为192.168.62.37   docker-server-2为192.168.62.15）
      restart_policy:
        condition: on-failure
  nacos_cluster_2:
    container_name: nacos_cluster_2
    image: nacos/nacos-server:1.2.0
    restart: always
    ports:
      - target: 9849
        published: 9849
        protocol: tcp
        mode: host
    volumes:
        - cluster2_logs:/home/nacos/logs
    environment:
      PREFER_HOST_MODE: ip
      NACOS_SERVERS: 192.168.62.37:9848 192.168.62.37:9849 192.168.62.15:9850 192.168.62.15:9851
      NACOS_SERVER_IP: 192.168.62.37
      NACOS_SERVER_PORT: 9849
      NACOS_AUTH_ENABLE: 'true'
      MYSQL_SERVICE_HOST: 192.168.62.37
      MYSQL_SERVICE_DB_NAME: nacos_devtest
      MYSQL_SERVICE_PORT: 23306
      MYSQL_SERVICE_USER: nacos
      MYSQL_SERVICE_PASSWORD: 123456
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.labels.env==docker-server-1
      restart_policy:
        condition: on-failure
  nacos_cluster_3:
    container_name: nacos_cluster_3
    image: nacos/nacos-server:1.2.0
    restart: always
    ports:
      - target: 9850
        published: 9850
        protocol: tcp
        mode: host
    volumes:
        - cluster3_logs:/home/nacos/logs
    environment:
      PREFER_HOST_MODE: ip
      NACOS_SERVERS: 192.168.62.37:9848 192.168.62.37:9849 192.168.62.15:9850 192.168.62.15:9851
      NACOS_SERVER_IP: 192.168.62.15
      NACOS_SERVER_PORT: 9850
      NACOS_AUTH_ENABLE: 'true'
      MYSQL_SERVICE_HOST: 192.168.62.37
      MYSQL_SERVICE_DB_NAME: nacos_devtest
      MYSQL_SERVICE_PORT: 23306
      MYSQL_SERVICE_USER: nacos
      MYSQL_SERVICE_PASSWORD: 123456
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.labels.env==docker-server-2
      restart_policy:
        condition: on-failure
  nacos_cluster_4:
    container_name: nacos_cluster_4
    image: nacos/nacos-server:1.2.0
    restart: always
    ports:
      - target: 9851
        published: 9851
        protocol: tcp
        mode: host
    volumes:
        - cluster4_logs:/home/nacos/logs
    environment:
      PREFER_HOST_MODE: ip
      NACOS_SERVERS: 192.168.62.37:9848 192.168.62.37:9849 192.168.62.15:9850 192.168.62.15:9851
      NACOS_SERVER_IP: 192.168.62.15
      NACOS_SERVER_PORT: 9851
      NACOS_AUTH_ENABLE: 'true'
      MYSQL_SERVICE_HOST: 192.168.62.37
      MYSQL_SERVICE_DB_NAME: nacos_devtest
      MYSQL_SERVICE_PORT: 23306
      MYSQL_SERVICE_USER: nacos
      MYSQL_SERVICE_PASSWORD: 123456
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.labels.env==docker-server-2
      restart_policy:
        condition: on-failure

volumes:
  cluster1_logs:
  cluster2_logs:
  cluster3_logs:
  cluster4_logs:

3.启动

docker stack deploy -c docker-cluster.yml nacos_cluster

采用stack部署，会根据配置文件中部署条件，按照docker节点标签部署到不同的节点上，每个docker节点部署2个nacos节点

4.Nginx代理配置

nginx配置文件添加

upstream nacos {
      server 192.168.62.37:9848 weight=1 max_fails=2 fail_timeout=10s;
      server 192.168.62.37:9849 weight=1 max_fails=2 fail_timeout=10s;
      server 192.168.62.15:9850 weight=1 max_fails=2 fail_timeout=10s;
      server 192.168.62.15:9851 weight=1 max_fails=2 fail_timeout=10s;
  }

location /nacos/ {
            proxy_pass  http://nacos;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header REMOTE-HOST $remote_addr;
            add_header X-Cache $upstream_cache_status;
            add_header Cache-Control no-cache;
        }

5.web访问是否成功

在浏览器输入：http://nginxIP:端口/nacos/index.html访问，如下：表示部署成功

节点列表

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