Big Data Elasticsearch of linux system installed Elasticsearch

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Three steps (linux system can)

1. Install the Java environment
2. Install and configure elasticsearch
3. Start elasticsearch

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1. Installation JDK1.8 +

Install version 1.8 or above jdk

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2. Install and configure elasticsearch

Download the compressed package (version 7.3.2 is used in the article)

$ wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.3.2-linux-x86_64.tar.gz
$ tar -zxvf elasticsearch-7.3.2-linux-x86_64.tar.gz

Or use the new general user

To run as a normal user can

useradd es
passwd es
chown -R es elasticsearch-7.3.2

Configuration

Opening step - configured in the initialization parameters in the configuration file elasticsearch.yml

$ vim /config/elasticsearch.yml

Add the following configuration file

#配置节点名
node.name: node-1
#配置远程访问
network.host: 0.0.0.0
#配置端口
http.port: 9200
#配置跨域访问
http.cors.enabled: true
http.cors.allow-origin: "*"
#配置集群主节点
cluster.initial_master_nodes: ["node-1"]
#关闭机器学习
xpack.ml.enabled: false

Configuring resource usage limits

# Increase the limit of available resources (after re-logged-on user to take effect)

vim /etc/security/limits.conf

Add the following configuration file in the final table

* soft nofile 65536
* hard nofile 65536
* soft nproc 4096
* hard nproc 4096

Increase the available resource limits

$ vim /etc/sysctl.conf

In the file add the following

vm.max_map_count=262144

View Configuration

$ sysctl -p

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3. Start elasticsearch

Start elasticsearch (if required after running daemon mode, add the parameter -d)

$ ./bin/elasticsearch

To interact with JSON format data RESTful API, based on the HTTP protocol through the communication port 9200 and Elasticsearch.
Such as access http: // ipaddress: 9200 /
get less returns

{
  "name" : "master1",
  "cluster_name" : "cluster1",
  "cluster_uuid" : "Fo9Qwp_FS8i-8lbZu0A6tA",
  "version" : {
    "number" : "7.3.2",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "1c1faf1",
    "build_date" : "2019-09-06T14:40:30.409026Z",
    "build_snapshot" : false,
    "lucene_version" : "8.1.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}