1.在/etc/systemd/system目录下创建elasticsearch1.service

注意:如果您的系统使用的不是Systemd，请根据您的init系统调整命令（如Upstart或SysVinit）。
如果在同一台机器启动多个节点，就按照本文再创建elasticsearch2.service就行了。

下面是elasticsearch1.service脚本内容
把目录/opt/app/middles/es/elasticsearch-7.8.0/替换成你的es安装目录

[Unit]
Description=es-node-1
Documentation=https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html
Wants=network-online.target
After=network.target network-online.target

[Service]
Type=simple
User=es
Group=es
WorkingDirectory=/opt/app/middles/es/elasticsearch-7.8.0/
ExecStart=/opt/app/middles/es/elasticsearch-7.8.0/bin/elasticsearch -p /opt/app/middles/es/elasticsearch-7.8.0/elasticsearch.pid
ExecStop=/bin/kill -TERM $MAINPID
ExecReload=/bin/kill -HUP $MAINPID
Restart=always
RestartSec=10

# Set environment variables
Environment=ES_HOME=/opt/app/middles/es/elasticsearch-7.8.0/
Environment=ES_PATH_CONF=/opt/app/middles/es/elasticsearch-7.8.0/config

# Specifies the maximum file descriptor number that can be opened by this process
LimitNOFILE=65536

# Specifies the maximum number of processes
LimitNPROC=4096

# Specifies the maximum size of virtual memory
LimitAS=infinity

# Specifies the maximum file size
LimitFSIZE=infinity

# Disable timeout logic and wait until process is stopped
TimeoutStopSec=0

# SIGTERM signal is used to stop the Java process
KillSignal=SIGTERM

# Send the signal only to the JVM rather than its control group
KillMode=process

# Java process is never killed
SendSIGKILL=no

# When a JVM receives a SIGTERM signal it exits with code 143
SuccessExitStatus=143

RuntimeDirectory=elasticsearch
RuntimeDirectoryMode=0755

[Install]
WantedBy=multi-user.target

2.重新加载

systemctl daemon-reload

3.常用命令

#设置开机启动
systemctl enable elasticsearch1.service 

#启动es
systemctl start elasticsearch1.service 
#停止es
systemctl stop elasticsearch1.service 
#查看es状态
systemctl status elasticsearch1.service