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### 一、安装 $ES$
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**1、下载安装包**
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进入官网下载$linux$安装包 [下载地址](https://www.elastic.co/cn/downloads/elasticsearch)
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**2、安装$JDK$$21$**
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```sh
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sudo yum install java-21-openjdk-devel
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echo 'export JAVA_HOME=/usr/lib/jvm/java-21-openjdk
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export PATH=$JAVA_HOME/bin:$PATH' >> ~/.bashrc
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source ~/.bashrc
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```
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**3、上传文件到$linux$服务器**
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```sh
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# 如果没有 rz 命令 先安装
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yum -y install lrzsz
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# rz 打开弹窗 选择下载好的文件 确认 在哪个目录下执行,就会上传到该目录下
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rz -be
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```
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**4、新建用户并设置密码**
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```sh
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# 创建用户
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useradd elauser
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# 设置密码 符合密码规范 大写 + 小写 + 数字 + 特殊字符 + 大于八位
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passwd elauser
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#输入密码:
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DsideaL@123
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tar -zxvf elasticsearch-9.0.2-linux-x86_64.tar.gz
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sudo chown -R elauser:elauser /usr/local/elasticsearch-9.0.2
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# 进入解压文件并编辑配置文件
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cd elasticsearch-9.0.2/config
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vi elasticsearch.yml
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# 修改数据目录和日志目录
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mkdir -p /usr/local/elasticsearch-9.0.2/data
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mkdir -p /usr/local/elasticsearch-9.0.2/logs
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```
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设置允许所有IP进行访问,在添加下面参数让$elasticsearch-head$插件可以访问$es$
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```yaml
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network.host: 0.0.0.0
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http.cors.enabled: true
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http.cors.allow-origin: "*"
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```
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**5、修改系统配置**
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```sh
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# m.max_map_count 值太低
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# 临时解决方案(需要root权限)
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sudo sysctl -w vm.max_map_count=262144
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# 永久解决方案(需要root权限)
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echo "vm.max_map_count=262144" | sudo tee -a /etc/sysctl.conf
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sudo sysctl -p
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# 验证是否有效
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sysctl vm.max_map_count
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```
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**6、启动**
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```sh
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# 启动
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su - elauser
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cd /usr/local/elasticsearch-9.0.2/bin
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# ./elasticsearch-keystore create
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# 启动 -d = damon 守护进程
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./elasticsearch -d
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# 访问地址
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https://10.10.14.206:9200
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# 日志文件
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/usr/local/elasticsearch-9.0.2/logs/elasticsearch.log
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```
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弹出输入账号密码,这里需要重置下密码,再登录 进入安装目录的bin目录下
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执行下面命令 就会在控制台打印出新密码 账号就是 elastic
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```
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./elasticsearch-reset-password -u elastic
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```
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登录成功,完活。
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```sh
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elastic
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jv9h8uwRrRxmDi1dq6u8
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```
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> **注意**:如果访问不到,请检查是否开启了$VPN$
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### 二、安装$ik$中文分词插件
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```bash
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# 安装分词插件
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./bin/elasticsearch-plugin install https://get.infini.cloud/elasticsearch/analysis-ik/9.0.2
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# 检查插件列表
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[elauser@maxkb elasticsearch-9.0.2]$ ./bin/elasticsearch-plugin list
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analysis-ik
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```
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