ElasticSearch是一个可高度扩展的开源数据存储、全文检索和数据分析的引擎,主要用于实现复杂搜索功能和数据分析需求的应用程序的底层引擎。
ElasticSearch是一个近实时(Near Real Time)的数据搜索和分析平台。从构建索引文档到可搜索文档会有一段微小的延迟,通常是1s以内。
1.站内产品搜索
电商平台上,可以使用elasticsearch来存储整个产品目录和库存,并为他们提供搜索和搜索词自定补全功能,允许客户搜索平台上销售的产品。
2. 收集并分析日志数据
可以使用Logstash(Elastic Static的一个组件)来收集、聚合和分析日志或事务数据,发现数据中隐藏的趋势、统计特性等。
3.海量商业数据可视化
如果想对TB甚至PB级的商业数据进行快速研究、分析、可视化并提出特定问题,可以使用ElasticSearch集群来存储数据,然后使用Kibana(Elastic Stack的一个组件)来构建自定义仪表盘(dashboard),可视化重要的数据维度。
构建集群用到的Linux系统及IP,其中节点node-1和node-2分别位于win10系统内的两台CentOS7虚拟机(VMware构建),node-3所在的Ubuntu系统是单独的一台电脑。
该节点使用ElasticSearch Linux系统安装包安装,
配置文件elasticsearch.yml如下:
---------------------------------- Cluster ----------------------------------- # # Use a descriptive name for your cluster: # cluster.name: my-application # # ------------------------------------ Node ------------------------------------ # # Use a descriptive name for the node: # node.name: node-1 # ---------------------------------- Network ----------------------------------- # # By default Elasticsearch is only accessible on localhost. Set a different # address here to expose this node on the network: # network.host: 192.168.2.130 # # By default Elasticsearch listens for HTTP traffic on the first free port it # finds starting at 9200. Set a specific HTTP port here: # http.port: 9200 # # For more information, consult the network module documentation. # --------------------------------- Discovery ---------------------------------- # # Pass an initial list of hosts to perform discovery when this node is started: # The default list of hosts is ["127.0.0.1", "[::1]"] # discovery.seed_hosts: ["192.168.2.130", "192.168.2.133","192.168.2.204"] # # Bootstrap the cluster using an initial set of master-eligible nodes: # cluster.initial_master_nodes: ["node-1","node-2","node-3"] # # For more information, consult the discovery and cluster formation module documentation. #配置允许跨域访问,否则elasticsearch-head无法访问集群信息 http.cors.enabled: true http.cors.allow-origin: "*"node-2
cluster.name: my-application node.name: node-2 network.host: 0.0.0.0 network.publish_host: 192.168.2.133 http.port: 9200 discovery.seed_hosts: ["192.168.2.130","192.168.2.133","192.168.2.204"] cluster.initial_master_nodes: ["192.168.2.130","192.168.2.133","192.168.2.204"]node-3
cluster.name: my-application node.name: node-3 network.host: 0.0.0.0 network.publish_host: 192.168.2.204 http.port: 9200 discovery.seed_hosts: ["192.168.2.130","192.168.2.133","192.168.2.204"] cluster.initial_master_nodes: ["192.168.2.130","192.168.2.133","192.168.2.204"] #Ubuntu20.04.2 需要增加如下配置,xpack.ml.enabled设置为false禁用X-Pack机器学习功能,否则启动失败 xpack.ml.enabled: falseElasticsearch-head查看集群信息
elasticsearch-head 安装在win10系统上,连接集群主节点node-1,只有该节点配置了允许ajax跨域访问,
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