indirectproxy mode refreshes graphs

[prupert]

When using indirectproxy to load graphs it seems that the graphs get refreshed very frequently while the service page of Icingaweb2 is open in our browsers.

I could not find a way to disable this or change the frequency in the docs.

FYI, our config from /etc/icingaweb2/modules/grafana/config.ini:

[grafana]
username = "REDACTED"
password = "REDACTED"
host = "REDACTED"
protocol = "https"
height = "280"
width = "640"
enableLink = "yes"
defaultdashboard = "REDACTED"
defaultdashboardstore = "REDACTED"
datasource = "influxdb"
accessmode = "indirectproxy"
timeout = 2

[Mikesch-mp]

Yes it does, but far less then the normal proxy mode which will load the image every 10 seconds. Indirect proxy refreshs the image only after the normal check interval of the service/host. This is done by setting the image header "cache-control".

[prupert]

Is there a way to disable reloading from the module?

[Mikesch-mp]

The module doesn't reload. It's icingaweb2 that refreshes pages every 10 seconds. But give me some days I will add an option to set cache time of the images in indirect proxy mode.

[prupert]

Awesome!

[jhuebner79]

Sorry for commenting on an old issue, I would raise a new one if necessary. How would I start to debug if I see the image being re-rendered every ten seconds? Looking at the response headers, it seems the feature is not working in 1.4.2, or I may have a misconfiguration somewhere. (edit: I'm so sorry, it seems I was on master, not on v1.4.2 - with v1.3.6, which I now checked out manually, a version I know from another installation, everything seems okay now; I'll try v1.4.2 as well)

The setup is: AWS loadbalancer -> two targets in a group (two master servers each serving icingaweb2)

I'm using

protocol = "https"
accessmode = "indirectproxy"
authentication = "basic"
indirectproxyrefresh = "no" # I tried yes and no, but the behaviour did not change.

Response header of the .png
cache-control: no-store, no-cache, must-revalidate
content-type: image/png
date: Thu, 02 Feb 2023 08:49:53 GMT
expires: Thu, 19 Nov 1981 08:52:00 GMT
pragma: public
server: Apache/2.4.38 (Debian)
set-cookie: AWSALB=stuff; Expires=Thu, 09 Feb 2023 08:49:51 GMT; Path=/
set-cookie: AWSALBCORS=stuff; Expires=Thu, 09 Feb 2023 08:49:51 GMT; Path=/; SameSite=None; Secure

Request header
:authority: icinga2.ourdomain.de
:method: GET
:path: /grafana/img?host=builder&service=Memory%2520physical&panelid=3&timerange=now-12h&timerangeto=now&cachetime=57
:scheme: https
accept: image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8
accept-encoding: gzip, deflate, br
accept-language: en-GB,en-US;q=0.9,en;q=0.8,de;q=0.7
cookie: stuff
referer: https://icinga2.ourdomain.de/dashboard
sec-ch-ua: "Not_A Brand";v="99", "Google Chrome";v="109", "Chromium";v="109"
sec-ch-ua-mobile: ?0
sec-ch-ua-platform: "macOS"
sec-fetch-dest: image
sec-fetch-mode: no-cors
sec-fetch-site: same-origin
user-agent: stuff

Please advise on how I can help to get help with this, @Mikesch-mp, thanks for your time!