change to yum mirror repository to korea ISP.

yum-mirror-change.php

<?php

// mirror list
$mirror_list = [
    'cdnetworks' => 'http://centos.mirror.cdnetworks.com/$releasever/os/$basearch/',
    'naver' => 'http://mirror.navercorp.com/centos/$releasever/os/$basearch/',
    'kakao' => 'http://mirror.kakao.com/centos/$releasever/os/$basearch/',
];

// root 가 아니면 현재 폴더에 생성
$dryrun = true;

if (is_root_user()) {
    $dryrun = false;
}

$opt = "f:rhkcno:";

$options = getopt($opt);

if (count($options) === 0 || isset($options['h'])) {
    help($argc, $argv, $mirror_list);
}

$file = $options['f'] ?? '/etc/yum.repos.d/CentOS-Base.repo';

$mirror = null;

if (isset($options['n'])) {
    $mirror[] = 'naver';
    $mirror[] = $mirror_list['naver'];
} elseif (isset($options['k'])) {
    $mirror[] = 'kakao';
    $mirror[] = $mirror_list['kakao'];
} else {
    // default
    $mirror[] = 'cdnetworks';
    $mirror[] = $mirror_list['cdnetworks'];
}

if (isset($options['r'])) {
    restore_repos_file();
}

// generate repository file.
change_mirror($dryrun, $file, $mirror);

/**
 * 저장소 파일 생성 & 변경
 * 
 * @param $dryrun
 * @param $repositoryFile
 * @param $mirror
 */
function change_mirror($dryrun, $repositoryFile, $mirror)
{
    if (! file_exists($repositoryFile)) {
        die("'$repositoryFile' File not found: ");
    }

    // 저장할 파일
    $outFile = $mirror[0].".repos";
    $pi = pathinfo($repositoryFile);
    $target = null;

    // root 로 실행중이면 repos 폴더에 저장
    if ($dryrun) {
        $outFile = fopen($outFile, "w+");
    } else {
        $target = $pi['dirname'] . DIRECTORY_SEPARATOR . $outFile;
        $outFile = fopen($target, "w+");
    }

    // INI_SCANNER_RAW 가 아니면 hash mark 를 주석으로 처리하지 않음.
    $ini = parse_ini_file($repositoryFile, true, INI_SCANNER_RAW);

    foreach ($ini as $section => $lines){
        // 주석 건너 뜀
        if (substr($section,0, 1) === '#') {
            continue;
        }

        $properties = [];

        fwrite($outFile, PHP_EOL . "[$section]" . PHP_EOL);

        foreach ($lines as $key => $value) {
            if (substr($key,0, 1) === '#') {
                continue;
            }

            if (substr($key, 0, strlen('mirrorlist')) === 'mirrorlist') {

                $key = '#' . $key;
            }

            $properties[$key] = $value;
        }

        $properties['baseurl'] = $mirror[1];

        foreach ($properties as $key => $value) {
            fwrite($outFile, $key . '=' . $value . PHP_EOL);
        }
    }

    fclose($outFile);

    if (! $dryrun) {
        if (is_link ($repositoryFile)) {
            unlink($repositoryFile);
        } 

       // backup 
       if (file_exists($repositoryFile)) {
            if (file_exists($repositoryFile . ".org")) {
                rename($repositoryFile, $repositoryFile . ".org-".mt_rand(1,100));
            } else {
                rename($repositoryFile, $repositoryFile . ".org");
            }
        }
        //symlink($pi['dirname'] . DIRECTORY_SEPARATOR . $pi['basename'], $outFile);
        $link = $pi['dirname'] . DIRECTORY_SEPARATOR . $pi['basename'];
        symlink($target, $link);

        print("you need to disable fastmirror plugin(enabled=0) in the '/etc/yum/pluginconf.d/fastestmirror.conf' file" . PHP_EOL);
    }
}

/**
 * print help
 *
 * @param $argc
 * @param $argv
 * @param $mirror_list
 */
function help($argc, $argv, $mirror_list)
{
    print "USAGE: php $argv[0] [OPTION]" . PHP_EOL;

    $cwd = getcwd();

    $usage =<<< USAGE
    -f REPOSITORY_FILE specify the repository file(default '/etc/yum.repos.d/CentOS-Base.repo')
    -o OUTPUT_FILE specify the modified repository file
        (if the user is root then save to '/etc/yum.repos.d/cdnetworks.repos' otherwise 
        {$cwd}/cdnetworks.repos)
    -r restore to origin repository file
    -c use cdnetwork mirror({$mirror_list['cdnetworks']})
    -n use naver mirror({$mirror_list['naver']})
    -k use kakao mirror({$mirror_list['kakao']})
USAGE;

    print $usage . PHP_EOL;

    exit(1);
}

/**
 * 원래 저장소 파일로 복구
 *
 */
function restore_repos_file()
{
    die("Not yet implemented.");
}

/**
 * root 로 실행 여부
 *
 * @return bool
 */
function is_root_user()
{
    if (function_exists('posix_getuid')) {
        if (posix_getuid() === 0) {
            return true;
        }
    }

    return false;
}

사용법

kakao 로 변경

sudo php yum-mirror-change.php -k

/etc/yum.repos.d/CentOS-Base.repo 을 cdnetwork으로 변경

sudo php yum-mirror-change.php -c -f /etc/yum.repos.d/CentOS-Base.repo

현재 폴더에 naver.repos 를 생성

php yum-mirror-change.php -n

참고

우분투 mirror 변경은 change-ubuntu-mirror.sh 를 참고