#独家

防火墙问题Another app is currently holding the xtables lock. Perhaps you want to use the -w opt？

目前有两台服务器操作必现，其他服务器没发现问题，这可能是什么原因
命令类似：
iptables -A INPUT -s xx.xx.xx.xx/32 -p tcp -m multiport -j ACCEPT –dports 10101,10102,10103
简化后的代码如下

package main

import (
    "bufio"
    "bytes"
    "log"
    "os"
    "os/exec"
)

const (
    FILENAME = "info.txt"
)

func main() {
    iptableList, err := getInfo()
    if err != nil {
        log.Println(err)
        return
    }
    for _, cmd := range *iptableList {
        var stdout, stderr bytes.Buffer
        command := exec.Command("bash", "-c", "iptables"+cmd)
        command.Stderr = &stderr
        command.Stdout = &stdout
        err := command.Run()
        if err != nil {
            log.Println(err, cmd)
            return
        }
    }

}

// 读取文件的内容，一共100多条
func getInfo() (*[]string, error) {

    file, err := os.Open(FILENAME)
    if err != nil {
        log.Fatal(err)
    }
    defer file.Close()

    scanner := bufio.NewScanner(file)
    var lines []string

    for scanner.Scan() {
        lines = append(lines, scanner.Text())
    }

    if err := scanner.Err(); err != nil {
        return &lines, err
    }
    return &lines, nil
}

Another app is currently holding the xtables lock。 应该是有其他程序占用，可以通过ps -fp $(pidof iptables)或者lsof -p $(pidof iptables)或者 lsof -n 2>/dev/null | grep xtables.lock 找到指定的进程，并处理掉，再重新执行命令

另外代码优化了一下，仅供参考。原代码”iptables” + cmd可能会有空格问题

package main

import (
    "bufio"
    "log"
    "os"
    "os/exec"
    "strings"
)

const (
    FILENAME = "info.txt"
)

func main() {
    iptableList, err := getInfo()

    if err != nil {
        log.Println(err)
        return
    }
    for _, cmd := range iptableList {
        output, err := exec.Command("iptables", strings.Split(cmd, " ")...).Output()
        if err != nil {
            log.Printf("cmd: %s, err: %s, output: %s\n", cmd, err, output)
            return
        }
    }
}

func getInfo() ([]string, error) {

    file, err := os.Open(FILENAME)
    if err != nil {
        log.Fatal(err)
    }
    defer file.Close()

    scanner := bufio.NewScanner(file)
    var lines []string

    for scanner.Scan() {
        lines = append(lines, scanner.Text())
    }

    if err := scanner.Err(); err != nil {
        return lines, err
    }
    return lines, nil
}