linux部署es8.0版本以及启动了浏览器访问不了

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
http://127.0.0.1:9200/
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