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：https://github.com/silenceshell/docker_mirror

查找国内最快的docker镜像源。

使用方法非常简单，下载 docker_mirror.py 文件到本地，执行下面的命令即可，脚本会自动从Azure, Tencent, Aliyun, Netease, ustc尝试下载registry:2镜像，并计算使用的时间；按使用时间最少的镜像设置docker配置，并重启docker进程。

sudo apt install python-pipsudo pip install docker -i https://mirrors.aliyun.com/pypi/simplesudo python ./docker_mirror.py

docker_mirror.py

#!/usr/bin/python# coding=utf8from __future__ import print_functionfrom __future__ import unicode_literalsimport platformimport reimport timeimport osimport dockerimport jsonmirror_prefix = "--registry-mirror="mirrors = {
       "azure": "http://dockerhub.azk8s.cn",    "tencent": "https://mirror.ccs.tencentyun.com",    "netease": "http://hub-mirror.c.163.com",    "ustc": "https://docker.mirrors.ustc.edu.cn",    "aliyun": "https://2h3po24q.mirror.aliyuncs.com"  # use your own aliyun mirror url instead.}docker_config_map = {
       "Ubuntu": {
           "config": "/etc/default/docker",        "prefix": "DOCKER_OPTS="    },    "CentOS Linux": {
           "config": "/etc/sysconfig/docker",        "prefix": "OPTIONS="    },    "Deepin": {
           "config": "/etc/default/docker",        "prefix": "DOCKER_OPTS="    }}docker_ce_config_map = {
       "Ubuntu": {
           "config": "/etc/docker/daemon.json",    },    "Deepin": {
           "config": "/etc/docker/daemon.json",    },    "Arch": {
           "config": "/etc/docker/daemon.json",    }}def get_dist():    return platform.linux_distribution()[0]def get_config(dist):    return docker_config_map[dist]["config"]def get_config_ce(dist):    return docker_ce_config_map[dist]["config"]def get_prefix(dist):    return docker_config_map[dist]["prefix"]def get_new_options(option, mirror):    option = option.strip()    quota = option[len(option) - 1]    if mirror_prefix in option:        r1 = re.compile('[\'\"]')        results1 = r1.split(option)        r2 = re.compile('[\s]')        results2 = r2.split(results1[1].strip())        for i in range(len(results2)):            if results2[i].startswith(mirror_prefix):                results2[i] = mirror_prefix + mirror        new_option = results1[0] + quota + " ".join(results2) + quota    else:        new_option = option[:-1] + " " + mirror_prefix + mirror + quota    new_option += "\n"    return new_optiondef execute_sys_cmd(cmd):    result = os.system(cmd)    return resultdef set_docker_config(mirror):    dist = get_dist()    docker_config = get_config(dist)    prefix = get_prefix(dist)    new_line = ""    options = ""    with open(docker_config, "r") as f:        for line in f:            if line.startswith(prefix):                options = get_new_options(line, mirror)            else:                new_line += line        if options == "":            options = prefix + "\'" + mirror_prefix + mirror + "\'"    with open(docker_config, "w") as f:        f.write(new_line)        f.writelines(options)def set_docker_config_ce(mirror):    dist = get_dist()    docker_config = get_config_ce(dist)    config_dict={
   }    if os.path.exists(docker_config) != True:        # if file not exist, create it first.        os.mknod(docker_config, 0o644)    else:        with open(docker_config, "r") as f:            config_dict = json.load(f)    config_dict[u'registry-mirrors'] = [mirror]    with open(docker_config, "w") as f:        json.dump(config_dict, f)def restart_docker_daemon():    execute_sys_cmd("systemctl restart docker")def get_speed(mirror, mirror_url):    client = docker.from_env()    version = client.version()[u'Version']    if "ce" in version:        set_docker_config_ce(mirror_url)    else:        set_docker_config(mirror_url)        restart_docker_daemon()    # try to delete busybox image in case.    execute_sys_cmd("docker rmi registry:2 -f 1> /dev/null 2>&1")    print("pulling registry:2 from {mirror}".format(mirror=mirror))    begin_time = time.time()    execute_sys_cmd("docker pull registry:2 1> /dev/null 2>&1")    end_time = time.time()    cost_time = end_time - begin_time    print("mirror {mirror} cost time: {cost_time}\n".format(mirror=mirror, cost_time=cost_time))    # delete centos images every time.    execute_sys_cmd("docker rmi registry:2 -f 1> /dev/null 2>&1")    return cost_time    #return 204800 / cost_timeif __name__ == "__main__":    print("restart docker daemon")    restart_docker_daemon()    max_speed = 0    total_time = 0    restart_count = 0    best_mirror = ""    best_mirror_url = ""    for k, v in mirrors.items():        cost_time = get_speed(k, v)        speed = 204800 / cost_time        if speed > max_speed:            max_speed = speed            best_mirror = k            best_mirror_url = v        restart_count += 1        total_time += cost_time        if restart_count >= 2 and total_time < 60:           #to avoid the error of docker daeom: Start request repeated too quickly           print("oh.. docker daemon restart too quickly, have a rest")           restart_count = 0           total_time = 0           time.sleep(60-total_time)    print("best mirror is: {mirror}, set docker config and restart docker daemon now.".format(mirror=best_mirror))    set_docker_config(best_mirror_url)    restart_docker_daemon()

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