将应用程序制作成服务启动

1、编写一个简单的服务

package main

import (
	"net/http"
)

func main() {
	http.HandleFunc("/hello", func(w http.ResponseWriter, r *http.Request) {
		w.Write([]byte("hello world!"))
	})
	http.ListenAndServe(":8090", nil)
}

2、制作makefile进行编译

# 命令必须以tab键开头
linux:
	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o server server.go
mac:
	CGO_ENABLED=0 GOOS=darwin GOARCH=amd64 go build -o server server.go
windows:
	CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build -o server server.go

$  make linux
CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o server server.go

$ mkdir -p /opt/myserver
$ cp server /opt/myserver/
$ touch /opt/myserver/config

3、做成服务

# 以服务启动
$ vim /lib/systemd/system/myserver.service

# 内容
[Unit]
Description=myserver
After=network.target
StartLimitIntervalSec=0
[Service]
Type=simple
Restart=always
RestartSec=1
WorkingDirectory=/opt/myserver
EnvironmentFile=/opt/myserver/config
ExecStart=/opt/myserver/server

[Install]
WantedBy=multi-user.target

# 常用命令
# 重新加载
systemctl daemon-reload
# 启动
systemctl start myserver.service
# 查看状态
systemctl status myserver.service
# 停止
systemctl stop myserver.service
# 开机启动和关闭
systemctl enable/disable myserver.service
# 重启
systemctl restart myserver.service
# 查看启动的服务
systemctl list-units --type=service | grep myserver.service

$ systemctl daemon-reload
$ systemctl start myserver.service
$ systemctl status myserver.service
● myserver.service - myserver
   Loaded: loaded (/usr/lib/systemd/system/myserver.service; disabled; vendor preset: disabled)
   Active: active (running) since Wed 2023-06-28 22:55:17 EDT; 4s ago
 Main PID: 21939 (server)
    Tasks: 5
   Memory: 740.0K
   CGroup: /system.slice/myserver.service
           └─21939 /opt/myserver/server

Jun 28 22:55:17 omdev systemd[1]: Started myserver.

# 发送请求
$ curl 192.168.43.150:8090/hello
hello world!