安装elasticsearch

授予用户某个文件夹权限 

https://www.jianshu.com/p/4860932a5ede

[root@localhost ~]# useradd es
[root@localhost ~]# passwd es
Changing password for user es.
New password: 123456
Retype new password:
[root@localhost ~]# chmod 777 /usr/local 【授予es⽤户/usr/local⽬录可读可写可执⾏权限】
[root@localhost ~]# su - es
[es@localhost ~]$

检查JDK版本(需要JDK1.8+)

[es@localhost ~]# java -version
openjdk version "1.8.0_222-ea"
OpenJDK Runtime Environment (build 1.8.0_222-ea-b03)
OpenJDK 64-Bit Server VM (build 25.222-b03, mixed mode)

将ES的压缩包上传⾄/usr/local ⽬录并解压

[es@localhost local]$ tar -zxvf elasticsearch-7.6.1-linuxx86_
64.tar.gz

查看配置⽂件

[es@localhost local]# cd elasticsearch-7.6.1/config/
[es@localhost config]# ls
elasticsearch.yml jvm.options log4j2.properties role_mapping.yml
roles.yml users users_roles

修改 jvm.options
Elasticsearch基于Lucene的，⽽Lucene底层是java实现，因此我们需要配置jvm参数

[es@localhost config]# vim jvm.options
# 默认配置如下
# Xms represents the initial size of total heap space
# Xmx represents the maximum size of total heap space
-Xms1g
-Xmx1g

修改 elasticsearch.yml
修改集群节点信息

# ---------------------------------- Cluster -----------------------
------------17
cluster.name: my-application
# ------------------------------------ Node ------------------------
------------23
node.name: node-1
# --------------------------------- Discovery ----------------------
------------72
cluster.initial_master_nodes: ["node-1"]

修改数据⽂件和⽇志⽂件存储⽬录路径（如果⽬录不存在则需创建

[root@localhost config]# vim elasticsearch.yml
# ---------------------------- Paths ------------------------------
path.data: /usr/local/elasticsearch-7.6.1/data
path.logs: /usr/local/elasticsearch-7.6.1/logs

修改绑定的ip，默认只允许本机访问，修改为0.0.0.0后则可以远程访问

# ---------------------------- Network -----------------------------
-
# 默认只允许本机访问，修改为0.0.0.0后则可以远程访问
network.host: 0.0.0.0

⾸先⽤root⽤户登录,然后修改配置⽂件:

vim /etc/security/limits.conf

添加下⾯的内容：

* soft nofile 65536
* hard nofile 131072
* soft nproc 4096
* hard nproc 4096

vm.max_map_count：限制⼀个进程可以拥有的VMA(虚拟内存区域)的数量

继续修改配置⽂件， vim /etc/sysctl.conf 添加下⾯内容：

vm.max_map_count=655360

修改完成之后在终端执⾏

##然后执⾏命令
sysctl -p

重新返回es用户

su es

进⼊elasticsearch/bin⽬录运⾏

[es@localhost elasticsearch-7.6.1]# cd /usr/local/elasticsearch-
7.6.1/bin
[es@localhost elasticsearch-7.6.1]# ./elasticsearch

---

es8启动成功后会有一个密码记录下来后面登录要用

还有run kibana 那个密钥30分钟也要用

样子大概是这样的

-> Elasticsearch security features have been automatically configured!
-> Authentication is enabled and cluster connections are encrypted.
 
->  Password for the elastic user (reset with `bin/elasticsearch-reset-password -u elastic`):
  RGiwCn4abvxC4CYHNqvU
 
->  HTTP CA certificate SHA-256 fingerprint:
  d19444a525f78eb2d2cc54dd176a5ba19d622d6f140e172c86efeaccdac3fd3b
 
->  Configure Kibana to use this cluster:
* Run Kibana and click the configuration link in the terminal when Kibana starts.
* Copy the following enrollment token and paste it into Kibana in your browser (valid for the next 30 minutes):
  eyJ2ZXIiOiI4LjAuMCIsImFkciI6WyIxNzIuMTkuNTEuNjU6OTIwMCIsIjE5Mi4xNjguMzEuMTE6OTIwMCIsIjE5Mi4xNjguMTA2LjE6OTIwMCIsIjE5Mi4xNjguMjMuMTo5MjAwIl0sImZnciI6ImQxOTQ0NGE1MjVmNzhlYjJkMmNjNTRkZDE3NmE1YmExOWQ2MjJkNmYxNDBlMTcyYzg2ZWZlYWNjZGFjM2ZkM2IiLCJrZXkiOiJ6TGhPOTM0QlBfcEVPS3pnVlhocTpNUmg0TnFqcVJvNm45R1ZHSFNPRllnIn0=
 
->  Configure other nodes to join this cluster:
* On this node:
  - Create an enrollment token with `bin/elasticsearch-create-enrollment-token -s node`.
  - Uncomment the transport.host setting at the end of config/elasticsearch.yml.
  - Restart Elasticsearch.
* On other nodes:
  - Start Elasticsearch with `bin/elasticsearch --enrollment-token <token>`, using the enrollment token that you generated.

第三个--->是密码

第五个 -->是密钥

真tm麻烦，记录一下