下载地址
https://www.elastic.co/cn/downloads/past-releases/elasticsearch-8-0-0
解压安装包
tar -zxvf elasticsearch-8.0.0-linux-x86_64.tar.gz
移动到指定文件夹
mv elasticsearch-8.0.0 /usr/local/elasticsearch-8.0
进入文件夹
cd /usr/local/elasticsearch-8.0/
新建data和log文件夹用于存放数据
mkdir data
mkdir log
进入config文件夹cd config/
修改elasticsearch.yml
vim elasticsearch.yml
path.logs: /usr/local/elasticsearch-8.0/log
#开启xpack
xpack.security.enabled: false
xpack.security.transport.ssl.enabled: false
#允许跨域
http.cors.enabled: true
http.cors.allow-origin: "*"
http.cors.allow-headers: Authorization,X-Requested-With,Content-Type,Content-Length
#配置
network.host: 0.0.0.0
http.port: 9200
cd /usr/local/elasticsearch-8.0/bin/
启动
./elasticsearch
1
出现错误：
因为es默认不能用root用户启动，也不推荐使用root启动es,通常需要去创建一个新用户
adduser es
passwd es
chown -R es:es /usr/local/elasticsearch-8.0/
chmod 770 /usr/local/elasticsearch-8.0/
切换用户，重新启动es
su es
./elasticsearch
开放端口：
firewall-cmd --zone=public --add-port=9200/tcp --permanent
firewall-cmd --reload
访问
#ip是配置文件中network.host会报错
ERROR: [3] bootstrap checks failed. You must address the points described in the following [3] lines before starting Elasticsearch.bootstrap check failure [1] of [3]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
bootstrap check failure [2] of [3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
bootstrap check failure [3] of [3]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured
ERROR: Elasticsearch did not exit normally - check the logs at /usr/local/elasticsearch-8.0/log/es8.log
主要是文件权限与内存大小问题：
elasticsearch用户拥有的可创建文件描述的权限太低，至少需要65536,
#切换到root用户修改
vim /etc/security/limits.conf # 在最后面追加下面内容
es hard nofile 65536
es soft nofile 65536 #es是启动elasticsearch的用户
max_map_count文件包含限制一个进程可以拥有的VMA(虚拟内存区域)的数量
#切换到root用户修改
vim /etc/sysctl.conf # 在最后面追加下面内容
vm.max_map_count=655360
执行 sysctl -p