108 lines
1.8 KiB
Markdown
108 lines
1.8 KiB
Markdown
---
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title: ElasticSearch
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description: 安装以及使用文档
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published: true
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date: 2021-10-23T09:14:15.263Z
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tags: elk
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editor: markdown
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dateCreated: 2021-10-23T09:14:15.263Z
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---
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> 版本：7.15.1，内存至少4G，7之前的版本需要安装jdk，7之后用自带的jdk11
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# 部署
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## 单机部署
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CentOS
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1. 创建用户组以及用户：elasticsearch不允许root用户启动
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```bash
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$ addgroup esg
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$ adduser es -g esg
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$ passwd es
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```
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2. 修改elasticsearch文件夹及下所有文件的权限
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```bash
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$ chown -R es:esg elasticsearch-7.15.1
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```
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3. 切换用户
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```bash
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$ su es
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```
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4. 修改配置文件（如果不对外开放，不需要配置）
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```bash
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vim elasticsearch-7.15.1/config/elasticsearch.yml
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```
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修改内容
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```yml
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# 默认为localhost
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network.host: 192.168.0.156
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# 默认为9200
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http.port: 9200
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# ["127.0.0.1", "[::1]"]
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discovery.seed_hosts: ["192.168.0.156"]
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```
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5. 启动
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```bash
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# 前台启动
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$ ./bin/elasticsearch
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# 帮助
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$ ./bin/elasticsearch -h
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# 后台启动
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$ ./bin/elasticsearch -d
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# 退出
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$ ./bin/elasticsearch -q
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# 查看版本
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$ ./bin/elasticsearch -V
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```
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6. 查看结果
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```bash
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curl http://127.0.0.1:9200
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或
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curl http://192.168.0.156:9200
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```
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> 报错：max virtual memory areas vm.max_map_count [65530] is too low...
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{.is-warning}
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以上错误表示用户的内存使用权限不够
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解决办法
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```bash
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# 切换回root用户
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$ su root
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# 设置参数，这里的262144为错误提示的最小值，可根据实际情况调整，但不能超过最大内存
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sysctl -w vm.max_map_count=262144
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# 查看设置结果，有值代表设置成功
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sysctl -a|grep vm.max_map_count
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# 修改配置文件
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vim /etc/sysctl.conf
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```
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/etc/sysctl.conf文件最后一行添加
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```vim
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vm.max_map_count=262144
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```
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立即生效
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```bash
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sysctl -p
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```
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切换回es用户，启动服务
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