Dashboard rendering fails if dashboard contains external images

Grafana
1

Hi All,

I am using Grafana with InfluxDB to visualize my OpenHab-Based SmartHome system which really rocks. But I am facing the following problem with the render plugin - rendering a dashboard works like a charm but when the dashboard contains a text visualization which I use to embed external webcam pictures (code example ) the rendering fails with a timeout.

Thanks

2

It sounds like Grafana does not have access to the external image. That’s the first thing I would check.

You might also turn on debug logging to see if you can get more information about the failure.

3

Hi Diana,

thanks for the hint - I enabled debug logging and I can see the following lines in the log

t=2020-09-21T17:11:08+0200 lvl=dbug msg=“Browser request finished” logger=plugins.backend pluginId=grafana-image-renderer url=https://www.foto-webcam.org/webcam/tegernseewest/current/816.jpg?1600365014 method=GET
t=2020-09-21T17:11:08+0200 lvl=dbug msg=“Browser request finished” logger=plugins.backend pluginId=grafana-image-renderer method=GET url=https://www.foto-webcam.org/webcam/wallberg/current/816.jpg
t=2020-09-21T17:11:08+0200 lvl=dbug msg=“Browser console warning” logger=plugins.backend pluginId=grafana-image-renderer msg="A cookie associated with a cross-site resource at http://192.168.0.250/ was set without the SameSite attribute. A future release of Chrome will only deliver cookies with cross-site requests if they are set with SameSite=None and Secure. You can review cookies in developer tools under Application>Storage>Cookies and see more details at https://www.chromestatus.com

4

Unfortunately, that hits the limit of my technical knowledge on this one. Hopefully this additional info helps you figure it out.