Elasticsearch的安装

docker安装(推荐)

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docker run -d --name elasticsearch -p 9200:9200 -p 9300:9300 --restart=always -e "discovery.type=single-node" -e ES_JAVA_OPTS="-Xms128m -Xmx512m" docker.elastic.co/elasticsearch/elasticsearch:7.10.1

重置密码

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bin/elasticsearch-reset-password -u elastic

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bin/elasticsearch-setup-passwords interactive

手动安装

环境准备

1. 安装java环境

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2. 配置环境变量

update-alternatives --config java
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.292.b10-1.el7_9.aarch64
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
javac

下载地址

• elasticsearch
• 浏览器插件

elasticsearch安装

不能安装在root目录，会权限不足启动失败

1. yum -y install wget
2. wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.10.0-linux-x86_64.tar.gz
3. tar -zxvf elasticsearch-7.10.0-linux-x86_64.tar.gz -C /usr/local/

adduser es
passwd es
chown -R es elasticsearch-7.10.0
su es

vi  config/elasticsearch.yml
network.host:  0.0.0.0
discovery.type: single-node
jvm.options改内存
./bin/elasticsearch -d
curl http://localhost:9200/

中文分词器

https://github.com/medcl/elasticsearch-analysis-ik

用root账户安装

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smartcn分词器

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canal安装

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F&Q

1. 内存不足
   /usr/local/logstash-7.10.0/config/jvm.options 添加以下代码

-Xms512m
-Xmx512m

2. 启动权限问题
   不能使用root用户，新建一个用户

NODE API

https://www.elastic.co/guide/en/elasticsearch/client/javascript-api/current/get_examples.html https://blog.csdn.net/UbuntuTouch/article/details/122874932