elasticsearch-7.6.2安装

CentOS 7.9

$ tar xvf elasticsearch-7.6.2.tar.gz -C /data/elasticsearch-7.6.2  

修改config/elasticsearch.yaml文件

cluster.name: my-es  
node.name: node-1  
network.host: 0.0.0.0  
http.port: 9200  
discovery.seed_hosts: ["0.0.0.0", "[::1]"]  
cluster.initial_master_nodes: ["node-1"]  

修改/etc/sysctl.conf文件配置

不修改的话启动会提示 max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

$ vim /etc/sysctl.conf  

vm.max_map_count = 262144

启动sysctl配置

$ sysctl -p  

设置环境变量

####### elasticsearch ######  
export ES_HOME=/data/elasticsearch-7.6.2  
export PATH=$PATH:$ES_HOME/bin  

切换用户

es不能使用root启动 data目录授权

$ groupadd  es  
$ useradd -g es es  
$ chown -R es:es /data/elasticsearch-7.6.2  

创建elasticsearch服务

$ vim /usr/lib/systemd/system/elasticsearch.service  

[Unit]  
Description=elasticsearch  
After=network.target  

[Service]  
Type=forking  
User=es  
Group=es  
ExecStart=/data/elasticsearch-7.6.2/bin/elasticsearch -d  
PrivateTmp=true  


# 指定此进程可以打开的最大文件数  
LimitNOFILE=65535  
# 指定此进程可以打开的最大进程数  
LimitNPROC=65535  
# 最大虚拟内存  
LimitAS=infinity  
# 最大文件大小  
LimitFSIZE=infinity  
# 超时设置 0-永不超时  
TimeoutStopSec=0  
# SIGTERM是停止java进程的信号  
KillSignal=SIGTERM  
# 信号只发送给给JVM  
KillMode=process  
# java进程不会被杀掉  
SendSIGKILL=no  
# 正常退出状态  
SuccessExitStatus=143  

[Install]  
WantedBy=multi-user.target

给脚本赋权限：

$ chmod +x /usr/lib/systemd/system/elasticsearch.service  

重新加载systemd的守护线程

$ sudo systemctl daemon-reload  

开机启动生效

$ sudo systemctl enable elasticsearch.service  

启动elasticsearch.service

$ sudo systemctl start elasticsearch.service  

查看elasticsearch.serivce状态

$ sudo systemctl status elasticsearch.service  

如果出现错误可以使用如下命令查看日志

$ sudo journalctl -u elaticsearch.service  

测试es

$ curl http://127.0.0.1:9200  

{  
  "name" : "node-1",  
  "cluster_name" : "my-es",  
  "cluster_uuid" : "dDwggAe9RfqyVRAp5s1Wzg",  
  "version" : {  
    "number" : "7.6.2",  
    "build_flavor" : "default",  
    "build_type" : "tar",  
    "build_hash" : "ef48eb35cf30adf4db14086e8aabd07ef6fb113f",  
    "build_date" : "2020-03-26T06:34:37.794943Z",  
    "build_snapshot" : false,  
    "lucene_version" : "8.4.0",  
    "minimum_wire_compatibility_version" : "6.8.0",  
    "minimum_index_compatibility_version" : "6.0.0-beta1"  
  },  
  "tagline" : "You Know, for Search"  
}  