centos7注冊gohttp開機自啟動

先上go http 服務代碼

package main

import (

"fmt"
"net"
"net/http"
"os"
"strconv"
"time"           

)

var (

g_localip string           

func main() {

var (
    port      = 8080
    host_addr string
    err       error
)
if len(os.Args) >= 2 {
    if port, err = strconv.Atoi(os.Args[1]); err != nil {
        fmt.Printf("param2 [%s] must in (1~65535)", os.Args[1])
        return
    }
}
g_localip = getLocalIP()
host_addr = fmt.Sprintf(":%d", port)
fmt.Printf("%s start httpsvr at [%s]", g_localip, host_addr)
http.HandleFunc("/", mainHandle)

http.ListenAndServe(host_addr, nil)           

}

func mainHandle(w http.ResponseWriter, r *http.Request) {

var (
    temp string
)
temp = fmt.Sprintf("%s, welcome! \ncurrent service machie is [%s], service time is [%s]",
    r.RemoteAddr, g_localip, formatTime())
w.Write([]byte(temp))           

func formatTime() string {

return fmt.Sprintf("%04d-%02d-%02d %02d:%02d:%02d.%03d", time.Now().Year(),
    time.Now().Month(), time.Now().Day(), time.Now().Hour(), time.Now().Minute(),
    time.Now().Second(), time.Now().Nanosecond()/1e6)           

func getLocalIP() string {

var (
    addrs   []net.Addr
    err     error
    address net.Addr
    ipnet   *net.IPNet
    ok      bool
)

if addrs, err = net.InterfaceAddrs(); err != nil {
    return ""
}
for _, address = range addrs {
    if ipnet, ok = address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
        if ipnet.IP.To4() != nil {
            return ipnet.IP.String()
        }
    }
}
return ""           

将上面的代碼編譯成http_test并放到/opt/http_test/目錄下

進入下面目錄

cd /etc/systemd/system/

建立一個名為httptest.service檔案，内容填寫如下

[Unit]

Description=httptest service

After=network.target

[Service]

Type=simple

ExecStart=/opt/http_test/http_test 8080 &

ExecStop=/bin/kill-s QUIT $MAINPID

User=root

Restart=on-abort

[Install]

WantedBy=multi-user.target

針對剛剛建立的檔案添加執行權限

chmod 754 httptest.service

上面節點的含義分别如下

Description服務的簡單描述

After依賴，僅當依賴的服務啟動之後再啟動自定義的服務單元

ExecStart 預設開啟8080端口

sudo systemctl daemon-reload

sudo systemctl enable httptest.service

sudo systemctl start httptest.service

--permanent永久生效，沒有此參數重新開機後失效,防火牆打開8080端口，同時重新整理防火牆

firewall-cmd --zone=public --add-port=8080/tcp --permanent

firewall-cmd --reload