思路

• 主要思路就是先拿到数据，通过执行docker images 写入到一个文件中
• 从文件中拿出数据，进行排序【这部分需要根据自己的需求来自定义编写，可以留言交流】
• 删除需要删除的镜像。

脚本内容

#coding:utf-8def get_date_time(date_list,date_range,version_date_range):    '''    获取列表中最大的时间    date_list: 时间列表,[20181109-11,20181110-1,20181110-2,20181111-4,20181111-5]    date_range: 每个项目保留的天数,如上保留两天,[20181109-11,20181110-1,20181110-2]    version_date_range: 每个项目保留的天数，其中每天保留几个版本,如上保留两天每天保留一个版本:[20181109-11,20181110-1]    '''    new_num_dict = {}    for i in date_list:        try:            date_time = int(i.split('-')[0])            version_num = int(i.split('-')[1])            if date_time not in new_num_dict.keys():                new_num_dict[date_time] = [version_num]            else:                new_num_dict[date_time].append(version_num)        except Exception:            pass    new_date_time_list = []    for i in new_num_dict.keys():        new_date_time_list.append(i)    new_date_time_list=sorted(new_date_time_list,reverse=True)    if len(new_date_time_list) > date_range:        keep_date_time_list = new_date_time_list[0:date_range]        delete_date_time_list = new_date_time_list[-(len(new_date_time_list)-date_range):]    else:        keep_date_time_list = new_date_time_list        delete_date_time_list = []    #print "天数保留的结果: %s" % keep_date_time_list    #print "天数删除的结果: %s" % delete_date_time_list    keep_version_num_list = []    delete_version_num_list = []    result = {}    for i in keep_date_time_list:        # 降序        sort_version_num_list = sorted(new_num_dict[i],reverse=True)        print (i,sort_version_num_list)        if len(sort_version_num_list) > version_date_range:            for n in range(version_date_range):                keep_version_num_list.append("{}-{}".format(i,sort_version_num_list[n]))            for n in range(1,(len(sort_version_num_list)-version_date_range)):                delete_version_num_list.append("{}-{}".format(i, sort_version_num_list[-n]))        else:            for n in range(len(sort_version_num_list)):                keep_version_num_list.append("{}-{}".format(i,sort_version_num_list[n]))    for i in delete_date_time_list:        sort_version_num_list = sorted(new_num_dict[i], reverse=True)        for n in sort_version_num_list:            delete_version_num_list.append("{}-{}".format(i,n))    result['keep'] = keep_version_num_list    result['delete'] = delete_version_num_list    #print '保留:',keep_version_num_list    #print '删除:',delete_version_num_list    return resultdef get_docker_images_info(filename,date_range,version_date_range):'''filename: 通过在registry服务器上执行会生成一个文本文件date_range: 每个项目保留的天数,如上保留两天,[20181109-11,20181110-1,20181110-2] version_date_range: 每个项目保留的天数，其中每天保留几个版本,如上保留两天每天保留一个版本:[20181109-11,20181110-1]'''    readlines_list=[]    with open(filename,'rb+') as f:            data = f.readlines()            for line in data:                if line:                    readlines_list.append(line)    f.close()    readlines_dict={}    for i in readlines_list:        readline_list = i.split()     #print (readline_list)        if readline_list[0] not in readlines_dict.keys():            readlines_dict[readline_list[0]] = [readline_list[1]]        else:            readlines_dict[readline_list[0]].append(readline_list[1])    result = {}    for k,v in readlines_dict.items():        # print "%s------------%s" % (k,v)        delete_date_list = get_date_time(v,date_range,version_date_range)        result[k] = delete_date_list    return resultif __name__ == "__main__":    import os    import datetime    home_path = '.'        #生成的文件    os.system("docker images > 1.txt")    ret=get_docker_images_info("1.txt",5,2)        #生成一个日志记录    with open("%s/logs/delete.%s.log" % (home_path,datetime.datetime.now().strftime('%Y-%m-%d')),'w+') as f:        for k,v in ret.items():            if len(v['delete']) > 0:                f.write("[%s] [%s] docker delete images:%s\n" % ((datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')),k,v['delete']))                for i in v['delete']:                    delete_docker_image_tag = ("{}:{}".format(k,i))                    print ('删除: %s' % delete_docker_image_tag)                    os.system("docker rmi %s " % delete_docker_image_tag)            if len(v['keep']) > 0:                f.write('[%s] [%s] docker keep images: %s\n' % ((datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')), k, v['keep']))                for i in v['keep']:                    keep_docker_image_tag = ("{}:{}".format(k,i))                    print ('保留: %s ' % keep_docker_image_tag)        f.close()