请参考以下链接：
https://www.elastic.co/guide/en/elasticsearch/reference/current/deb.html

这是用1个节点配置Elasticsearch集群时的安装步骤说明。下面的步骤是以root用户身份执行的。

1. 安装 Elasticsearch

wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | apt-key add -
echo "deb https://artifacts.elastic.co/packages/7.x/apt stable main" | tee -a /etc/apt/sources.list.d/elastic-7.x.list
apt update
apt install elasticsearch

2. 编辑jvm.options

将-XmsXX和-XmxXX参数更改为操作系统内存的一半（以4GB为例）。

-Xms2g
-Xmx2g

3. 编辑elasticsearch.yml文件

添加以下参数。

network.host: XX.XX.XX.XX # 自身のIPアドレス
discovery.type: single-node

4. 打开

systemctl start elasticsearch

5. 确认动作

curl http://XX.XX.XX.XX(network.hostに設定したIPアドレス):9200
{
  "name" : "cloudclt1",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "U1IGG-fURIWGXH1EcWYWtA",
  "version" : {
    "number" : "7.3.0",
    "build_flavor" : "default",
    "build_type" : "deb",
    "build_hash" : "de777fa",
    "build_date" : "2019-07-24T18:30:11.767338Z",
    "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"
}