ElasticSearch7.2(Linux Centos 单节点)安装及启动报错解决

1、官网下载ElasticSearch7.2

      打开官⽹链接 https://www.elastic.co/guide/en/elastic-stack/7.2/index.html

      选择你要下载的版本

      下载完成之后，解压到自己想放的路径下

2、JDK环境配置。。。省略

      注意：ElasticSearch对jdk版本要求很严格，我用的jdk11对应ES7.2

3、修改配置文件：/opt/es/elasticsearch-7.2.0/config/elasticsearch.yml   

network.host: 192.168.164.26
http.port: 9200

4、启动

     进入到|/opt/es/elasticsearch-7.2.0/bin/，启动命令：./elasticsearch

     或者守护进程的方式可以使用sh elasticsearch.sh -d -p pid 

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启动问题处理：

ERROR: [5] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
[2]: memory locking requested for elasticsearch process but memory is not locked
[3]: max number of threads [1024] for user [wangxiang] is too low, increase to at least [4096]
[4]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[5]: system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk

1.修改vi /etc/security/limits.conf文件，增加配置

*               soft    nofile          65536
*               hard    nofile          65536

2.  切换到root用户，编辑vi /etc/security/limits.conf配置文件，添加如下内容: 

* soft memlock unlimited 
* hard memlock unlimited 

     备注：* 代表Linux所有用户名称

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3. 最大线程个数太低。修改配置文件 vi /etc/security/limits.d/90-nproc.conf

*               soft    nproc           4096
*               hard    nproc           4096

4. 修改/etc/sysctl.conf文件，增加配置

vm.max_map_count=262144
或者
vm.max_map_count=655360

    执行命令sysctl -p生效

5. 在elasticsearch.yml中添加配置项

bootstrap.memory_lock: false
bootstrap.system_call_filter: false

6、在elasticsearch.yml中修改配置项

node.name: node-1
cluster.initial_master_nodes: ["node-1"]

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