实现目的：不需要打开Grafana查看监控图，自动根据告警将图片保存并发送
1）获取Grafana Service Token

2）获取面板ID，并构建图形URL

GRAFANA_API_URL = os.environ['GRAFANA_API_URL']
GRAFANA_SERVICE_TOKEN = GetDecryptToken(os.environ['GRAFANA_SERVICE_TOKEN'])
GRAFANA_SERVICE_USER = GetDecryptToken(os.environ['GRAFANA_SERVICE_USER'])

DNS_DASHBOARD_LIST = {
    "DNS1": "/render/d-solo/3hfXaZV7k/dns?orgId=1&panelId=120&tz=Asia%2FShanghai",
    "DNS2": "/render/d-solo/3hfXaZV7k/dns?orgId=1&panelId=108&tz=Asia%2FShanghai"
}

def Combine_Images_Vertically(images_list=[], output_path_filename=None):
    images = [Image.open(image) for image in images_list]
    widths, heights = zip(*(i.size for i in images))
    new_width = max(widths)
    new_height = sum(heights)
    new_image = Image.new('RGB', (new_width, new_height))
    y_offset = 0
    for img in images:
        new_image.paste(img, (0, y_offset))
        y_offset += img.height

    new_image.save(output_path_filename)
    if os.path.exists(output_path_filename):
        return True
    else:
        return False

def Show_Grafana_Dashboard(dashboard_url_list=None, dashboard_name=None, from_time=None, to_time=None, last_minutes=5, group_id=None, erp=None, image_combine=False):
    IMG_HEIGHT = 500
    IMG_WIDTH = 1500
    headers = {
        "Authorization" : f"Bearer {GRAFANA_SERVICE_TOKEN}"
    }

    if from_time is not None and to_time is not None:
        current_year = datetime.now().year
        from_time = f"{current_year}/{from_time}" 
        to_time = f"{current_year}/{to_time}" 
        from_time_obj = datetime.strptime(from_time, '%Y/%m/%d %H:%M')
        to_time_obj = datetime.strptime(to_time, '%Y/%m/%d %H:%M')
        from_time_unix = int(from_time_obj.timestamp() * 1000)
        to_time_unix = int(to_time_obj.timestamp() * 1000)

    elif last_minutes is not None and  0 < last_minutes < 60:
        to_time = datetime.now()
        from_time = to_time - timedelta(minutes=last_minutes)
        from_time_unix = int(from_time.timestamp() * 1000)
        to_time_unix = int(to_time.timestamp() * 1000)
   
    rendered_images_fullpath_list = []
    rendered_images_filename_list = []
    for dashboard_url in dashboard_url_list:
        URL = GRAFANA_API_URL + dashboard_url + f"&from={from_time_unix}&to={to_time_unix}&width={IMG_WIDTH}&height={IMG_HEIGHT}"
        timestamp = int(time.time())
        image_file_name =  f"grafana_images_{timestamp}.png"
        image_file_path = os.path.join(IMG_WEB_DIR, image_file_name)
        file_counter = 1
        
        while os.path.exists(image_file_path):
            image_file_name = f"grafana_images_{timestamp}_{file_counter}.png"
            image_file_path = os.path.join(IMG_WEB_DIR, image_file_name)
            file_counter += 1
        try:
            response = requests.get(URL, headers=headers, timeout=10)
            if response.status_code == 200:
                with open(image_file_path, 'wb') as f:
                    f.write(response.content) 
                rendered_images_fullpath_list.append(image_file_path)
                rendered_images_filename_list.append(image_file_name)
            else:
                running_logger.error(f'Server Error, {response.status_code},  Grafana获取图片失败')
        except Exception as e:
            running_logger.error(f'Server Error, {e},  Grafana获取图片失败')
            BotSendMessage(erp=erp,group_id=group,msg=f"【ERROR】Grafana API获取失败！")
            pass

    if rendered_images_fullpath_list is not None:
        if image_combine is True:
            timestamp_combine = int(time.time())
            image_file_name_combine =  f"grafana_combine_images_{timestamp}.png"
            image_file_path_combine = os.path.join(IMG_WEB_DIR, image_file_name_combine)
            file_counter = 1
            
            while os.path.exists(image_file_path_combine):
                image_file_name_combine = f"grafana_combine_images_{timestamp}_{file_counter}.png"
                image_file_path_combine = os.path.join(IMG_WEB_DIR, image_file_name_combine)
                file_counter += 1

            if Combine_Images_Vertically(rendered_images_fullpath_list, output_path_filename=image_file_path_combine):
                BotSendInteractiveCardsMessage(erp=erp, group_id=group_id, img=image_file_name_combine, title=dashboard_name, deeplink_url=None)
        else:
            for image_file in rendered_images_filename_list:
                BotSendInteractiveCardsMessage(erp=erp, group_id=group_id, img=image_file, title=dashboard_name, deeplink_url=None, deeplink_url_name=None)

dashboard_url_list = []
dashboard_url_list.append(f"{DNS_DASHBOARD_LIST ['DNS1']}&var-IP={ip}")
dashboard_url_list.append(f"{DNS_DASHBOARD_LIST ['DNS2']}&var-IP={ip}")
dashboard_title = f"最近5分钟 {IP} DNS解析峰值 {_peak}{_unit}"
Show_Grafana_Dashboard(dashboard_url_list=dashboard_url_list, dashboard_name=f"{dashboard_title}", last_minutes=5, group_id=group_id, erp=erp, image_combine=True)