1.環境準備

nacos 的官方地址

文檔手冊
https://nacos.io/zh-cn/index.html
下載頁面
https://github.com/alibaba/nacos/releases

由于服務器資源有限，方便測試，我主要采用2臺centos云服務器，并且已經具備docker swarm環境（搭建參見 docker swarm環境），來搭建4個節點的nacos集群服務：

兩臺服務器，每臺分別部署兩個nacos節點，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數據庫環境支持，腳本conf/nacos-mysql.sql。

同時4個節點通過nginx通過對外服務，nginx搭建請參考其他文件，nginx配置在后面會給出。

2.docker-cluster.yml文件

通過swarm集群，配置好docker-compose文件內容，自動部署到不同的docker節點

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（默認為ingress，配置較靈活，根據自己的需求也可調整為ingress，本案例防止nacos 采用 swarm集群調度，所以改為host模式，兩臺服務器之間通過內網及nacos端口訪問，通過nginx配置對外服務）
    volumes:
      - cluster1_logs:/home/nacos/logs  #配置docker存儲日志的卷
    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版本默認關閉登陸界面
      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       #部署時，指定部署一個副本
      placement:
        constraints:
          - node.labels.env==docker-server-1  #根據標簽指定部署到的節點，標簽需要自己事先配置好（本案例節點docker-server-1為192.168.62.37   docker-server-2為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.啟動

docker stack deploy -c docker-cluster.yml nacos_cluster

采用stack部署，會根據配置文件中部署條件，按照docker節點標簽部署到不同的節點上，每個docker節點部署2個nacos節點

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訪問是否成功

在瀏覽器輸入：http://nginxIP:端口/nacos/index.html訪問，如下：表示部署成功

節點列表