grafana自动截图

本文主要是介绍grafana自动截图，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

    Grafana支持将面板自动呈现为PNG图像。这允许Grafana自动生成面板的图像，以便将其包含在警报通知中。需要安装grafana-image-renderer插件，安装可以参考官网https://grafana.com/grafana/plugins/grafana-image-renderer/

docker模式运行yml

  grafana:
    container_name: grafana
    depends_on:
      - prometheus
    image: grafana/grafana:7.5.7
    volumes:
      - type: bind
        source: /etc/localtime
        target: /etc/localtime
      - type: volume
        source: grafana
        target: /var/lib/grafana
    environment:
      GF_SERVER_DOMAIN: 127.0.0.1
      GF_RENDERING_SERVER_URL: http://127.0.0.1:8081/render
      GF_RENDERING_CALLBACK_URL: http://127.0.0.1:7000/
      GF_LOG_FILTERS: rendering:debug
    ports:
      - "7000:3000"
    networks:
      - prom

  renderer:
    container_name: renderer
    image: grafana/grafana-image-renderer:latest
    ports:
      - "8081:8081"
    networks:
      - prom

然后打开grafan，选择share，点击 Direct link rendered image，可以看到图片和对应的url

 在呈现图像时，PNG图像被临时写入文件系统。当图像呈现时，PNG图像被临时写入Grafana数据文件夹中的PNG文件夹。

url格式如下

http://127.0.0.1:8300/render/d-solo/ZypwSrZnz/xxxx?orgId=1&from=1645077536501&to=1645099136501&panelId=30&width=1000&height=500&tz=Asia%2FShanghai

然后就可以通过python请求下载和保存图片，下载时需要认证，可以通过grafana生成api key，用来做认证授权

# 获取时间戳
def get_time():
    t = datetime.datetime.now()
    # 当前日期
    t1 = t.strftime('%Y-%m-%d %H:%M:%S')
    # 转为秒级时间戳
    ts1 = time.mktime(time.strptime(t1, '%Y-%m-%d %H:%M:%S'))
    # 转为毫秒级
    end_time = int(str(ts1 * 1000).split(".")[0])

    # 1小时前
    t2 = (t - datetime.timedelta(hours=1)).strftime("%Y-%m-%d %H:%M:%S")
    # 转为秒级时间戳
    ts2 = time.mktime(time.strptime(t2, '%Y-%m-%d %H:%M:%S'))
    # 转为毫秒级
    start_time = int(str(ts2 * 1000).split(".")[0])
    return str(start_time), str(end_time)

# 下载pic
def download_pic():

    grafana_server = "xxxxx"
    url = (grafana_server + '/render/d-solo/xxx' +
                '?orgId=1&from=' +
               get_time()[0] + '&to=' + get_time()[1] +
                 "&panelId=30&width=1000&height=500&tz=Asia%2FShanghai"
                )
    print(url)
 
    header = {"Content-Type": "application/json","Authorization": "Bearer  xxxx"} # 用管理员去Grafana生成API Key
    res = requests.get(url,headers=header)
    time_now = int(time.time())
    time_local = time.localtime(time_now)
    dt = time.strftime("%Y-%m-%d",time_local)
    img_name = "img"+dt+".jpg"
    filename =  img_name
    with open(filename, "wb") as f:
        f.write(res.content)

        return filename


download_pic()

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