一、Elasticsearch集群的搭建

1.Master准备

1.1 先创建Elasticsearch Master节点

1.2 然后在Elasticsearch中config目录中，找到elasticsearch.yml文件

1.3 然后elasticsearch.yml内添加内容

cluster.name: es-cluster
node.name: node-1
node.master: true
node.attr.rack: r1
network.host: localhost
http.port: 9201
transport.tcp.port: 9301
discovery.seed_hosts: ["localhost:9301", "localhost:9302", "localhost:9303"]
cluster.initial_master_nodes: ["node-1","node-2","node-3"]

1.4 然后进入Elasticsearch bin目录中启动

​ elasticsearch.bat

2.Elasticsearch DataNode节点1准备

2.1 先创建Elasticsearch DataNode节点

2.2 然后在Elasticsearch中config目录中，找到elasticsearch.yml文件

2.3 然后在elasticsearch.yml内添加内容

cluster.name: es-cluster
node.name: node-2
node.master: false
#node.master: true
node.attr.rack: r1
bootstrap.memory_lock: false
network.host: localhost
http.port: 9202
transport.tcp.port: 9302
discovery.seed_hosts: ["localhost:9301", "localhost:9302", "localhost:9303"]
cluster.initial_master_nodes: ["node-1","node-2","node-3"]

2.4 然后进入Elasticsearch bin目录中启动

​ elasticsearch.bat

3.Elasticsearch DataNode节点2准备

3.1 先创建Elasticsearch DataNode节点

3.2 然后在Elasticsearch中config目录中，找到elasticsearch.yml文件

3.3 然后在elasticsearch.yml内添加内容

cluster.name: es-cluster
node.name: node-3
node.master: false
#node.master: true
node.attr.rack: r1
bootstrap.memory_lock: false
network.host: localhost
http.port: 9203
transport.tcp.port: 9303
discovery.seed_hosts: ["localhost:9301", "localhost:9302", "localhost:9303"]
cluster.initial_master_nodes: ["node-1","node-2","node-3"]

3.4 然后进入Elasticsearch bin目录中启动

​ elasticsearch.bat

4.elasticsearch-head-master准备

4.1 elasticsearch-head-master前提

node.js 运行环境：http://nodejs.cn/download/

elasticsearch-head-master下载地址：https://github.com/mobz/elasticsearch-head/archive/refs/heads/master.zip

4.2 elasticsearch-head-master安装

4.1.1 进入到elasticsearch-head-master目录中

​ 4.2.2 然后使用cmd输入npm install，进行安装

4.3 elasticsearch-head-master运行

​ 然后使用cmd输入npm run start，进行运行

4.4 elasticsearch-head-master访问

​ 进入到浏览器输入http://localhost:9100进行访问

elasticsearch-head-master说明

• green：绿色，代表搭建成功
• red:红色，搭建失败
• yellow:黄色，只有一个节点可用，也算搭建失败

二、Elasticsearch集群的使用

Elasticsearch集群在微服务项目集成

   /// <summary>
    /// 商品服务实现
    /// </summary>
    public class ProductService : IProductService
    {
        private readonly ElasticClient elasticClient;
   public ProductService(/*IConfiguration configuration*/IOptions<ProductMongoDBOptions> options)
    {
        /* ProductMongoDBOptions productMongoDBOptions = options.Value;
         // 1、建立MongoDB连接
         var client = new MongoClient(productMongoDBOptions.ConnectionString);

         // 2、获取商品库
         var database = client.GetDatabase("productdb");

         // 3、获取商品表(集合)
         _products = database.GetCollection<Product>("Product");*/
        #region 1、单实例连接
        {
           /* var node = new Uri("http://localhost:9200");
            // var defaultIndex = "products";

            var settings = new ConnectionSettings(node);
            //.DefaultIndex(defaultIndex);

            elasticClient = new ElasticClient(settings);*/
        }
        #endregion

        #region 2、集群连接
        {
            var nodes = new Uri[]
            {
                new Uri("http://localhost:9201"),
                new Uri("http://localhost:9202"),
                new Uri("http://localhost:9203"),
            };
            var pool = new StaticConnectionPool(nodes);
            var settings = new ConnectionSettings(pool);

            elasticClient = new ElasticClient(settings);
        }
        #endregion

    }
}

进入到浏览器进行访问

然后进入elasticsearch-head-master中，查看数据