systemctl enable 配置开机自启动-优快云博客

本文详细介绍了如何配置Nginx服务，包括创建nginx.service文件，执行systemd命令启动、重启和检查，以及配合Quagga、Keepalived的部署。还展示了如何用systemd管理jar包和自定义服务如lb-agent，适合运维与开发人员参考。

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下边以nginx为例

配置nginx.service文件

nginx 常用命令

/usr/local/nginx/sbin/nginx  #启动
/usr/local/nginx/sbin/nginx  -s reload  #重启
/usr/local/nginx/sbin/nginx  -s   stop    #关闭nginx

vim /usr/lib/systemd/system/nginx.service

[Unit]
Description=nginx
After=network.target

[Service]
Type=forking
ExecStart=/usr/local/nginx/sbin/nginx
ExecReload=/usr/local/nginx/sbin/nginx -s reload
ExecStop=/usr/local/nginx/sbin/nginx -s quit
PrivateTmp=true

[Install]
WantedBy=multi-user.target

执行systemctl enable nginx.service

执行reboot重启虚拟机

开机查看程序 ps aux | grep nginx 查看进程启动成功

查看系统服务文件是否被识别

systemctl list-unit-files|grep nginx
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systemctl 开机启动jar包

1，jar包运行命令

nohup /usr/java/jdk1.8.1/bin/java -jar /usr/sbin/lb-agent.jar >>/var/log/lb-agent.log 2>&1 &

2，创建一个可执行文件lb-agent.sh

source /etc/profile
jarName="lb-agent.jar"
workDir="/usr/sbin"

start(){
    nohup /usr/local/java/jdk1.8.1/bin/java -jar /usr/sbin/lb-agent.jar >>/var/log/lb-agent.log 2>&1 &
}
case $1 in
    start)
        start
        ;;
esac

3，创建lb-agent.service文件

[Unit]
Description=lb-agent server
Wants=network-online.target
After=network.target

[Service]
Type=forking
WorkingDirectory=/root
ExecStart=/bin/bash lb-agent.sh start

[Install]
WantedBy=multi-user.target

4，执行systemd命令

systemctl enable lb-agent.service

5，执行reboot重启，查看进程是否成功启动

配置quagga，keepalived

cd /usr/lib/systemd/system

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yum install quagga -y  安装后再次查看文件

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zebra.service

[Unit]
Description=GNU Zebra routing manager
Wants=network.target
Before=network.target
ConditionPathExists=/usr/local/etc/zebra.conf

[Service]
Type=forking
PIDFile=/run/quagga/zebra.pid
# ExecStartPre描述了启动当前服务之前执行的命令。
ExecStartPre=/sbin/ip route flush proto zebra
ExecStart=/usr/local/sbin/zebra -d -f /usr/local/etc/zebra.conf -A 127.0.0.1
Restart=on-abort

[Install]
WantedBy=multi-user.target

ospfd.service

[Unit]
Description=OSPF routing daemon
BindsTo=zebra.service
After=zebra.service
ConditionPathExists=/usr/local/etc/ospf.conf

[Service]
Type=forking
PIDFile=/run/quagga/ospfd.pid
ExecStart=/usr/local/sbin/ospfd  -d -f /usr/local/etc/ospf.conf -A 127.0.0.1
Restart=on-abort

[Install]
WantedBy=multi-user.target

yum install keepalived -y

[Unit]
Description=LVS and VRRP High Availability Monitor
After=syslog.target network-online.target

[Service]
Type=forking
PIDFile=/var/run/keepalived.pid
KillMode=process
ExecStart=/usr/local/keepalived/sbin/keepalived

[Install]
WantedBy=multi-user.target