elasticsearch7.5安装遇到的坑

database

没错,从零开始的elasticsearch搭建教程开始了!h"h **

原文:https://www.cnblogs.com/heermayou/p/12670662.html

那么首先假设 你已经装好了一个CentOS系统 ,我的是centos6.7的

 

1.到官网下载Elasticsearch

地址: https://www.elastic.co/cn/downloads/past-releases#elasticsearch

我下的是7.5.2

2.上传压缩包到Linux服务器(略)

3.安装

  3.1 解压上传好的安装包

tar -zxvf elasticsearch-7.5.2-linux-x86_64.tar.gz 
  

  3.2 尝试启动

linux中 elasticsearch不能以root用户启动
所以先建一个普通用户

adduser username

更改文件夹所属权

chown -R username ./elasticsearch-7.5.2 


进入已经解压好的elasticsearch 的目录中

cd elasticsearch-7.5.2/

切换用户:

su username

启动elasticsearch

./bin/elasticsearch

这里来说一般都会成功,如果本的配置了JAVA_HOME的环境路径,
而且java的版本比较低的话启动就会失败,elasticsearch中有jdk的版本最好使用该版本的jdk

vi bin/elasticsearch

在开始的位置加入:
export JAVA_HOME=/opt/program/elasticsarch/elasticsearch-7.5.2/jdk      #(此处es的jdk所在目录)
export PATH=$JAVA_HOME/bin:$PATH
:wq 保存并退出

然后再次启动,完美成功!
ctrl + c 关闭运行

 

3.3 开放远程连接

修改 config下的 elasticsearch.yml
vi config/elasticsearch.yml

修改下面配置:

network.host: 0.0.0.0 #改为0.0.0.0对外开放,如对特定ip开放则改为指定ip

http.port: 9200 #可更改端口不为9200

 

启动可能会报错:

1virtual65530is262144vi /etc/sysctl.conf

加入:

vm.max_map_count=655360

 

然后加载参数

sysctl -p

继续启动可能报的错误:

[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]

[2]: max number of threads [1024] for user [elastic] is too low, increase to at least [4096]

[3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

[4]: system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk

[5]: 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

 

.打开/etc/security/limits.conf,在里面添加如下内容

 

* soft nofile 65536

* hard nofile 65536

 

此处不行还要修改 /etc/security/limits.d/90-nproc.conf

* soft nproc 1024

将上面修改为:

* soft nproc 2048

 其中*表示所有用户  nofile表示最大文件句柄数,表示能够打开的最大文件数目

再次启动出现下列错误时:

ERROR: [2] bootstrap checks failed

[1]: system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk

[2]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] mu

修改elastic search.yml文件加入:
bootstrap.memory_lock: false

bootstrap.system_call_filter: false

再次出现以下错误时:

ERROR: [1] bootstrap checks failed

[1]: 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

修改elasticsearch.yml文件加入:

cluster.initial_master_nodes: ["node-1"]

 

再次启动应该就ok了。。。

 

3.4 elasticsearch 后台启动

./bin/elasticsearch -d

 

以上是 elasticsearch7.5安装遇到的坑 的全部内容, 来源链接: utcz.com/z/533088.html

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