Rendered image with context Grafana Image Renderer not the png

[Huimintai]

What happened:
The image render can not generate a png but a text file:

When check the download image file:

# file Pipelines_Day.png
Pipelines_Day.png: ASCII text, with no line terminators

# cat Pipelines_Day.png
Grafana Image Renderer

What you expected to happen:
Render the png images.

Anything else we need to know?:
The image render deployment:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: grafana-image-renderer
  labels:
    app: grafana-image-renderer    
spec:
  replicas: 1
  selector:
    matchLabels:
      app: grafana-image-renderer  
  template:
    metadata:
      labels:
        app: grafana-image-renderer 
    spec:
      containers:
      - name: renderer
        image: grafana/grafana-image-renderer:latest
        ports:
        - name: http
          containerPort: 8081
        env:
        - name: ENABLE_METRICS
          value: "true"
        - name: IGNORE_HTTPS_ERRORS
          value: "true"
        - name: LOG_LEVEL
          value: debug
        resources:
          limits:
            cpu: 1000m
            memory: 1000Mi
          requests:
            cpu: 100m
            memory: 100Mi
---
apiVersion: v1
kind: Service
metadata:
  name: grafana-image-renderer
  labels:
    app: grafana-image-renderer   
spec:
  ports:
  - port: 8081
    targetPort: 8081
    name: http
  selector:
    app: grafana-image-renderer    

grafana env:

        - name: GF_RENDERING_SERVER_URL
          value: http://grafana-image-renderer:8081
        - name: GF_RENDERING_CALLBACK_URL
          value: http://grafana:80

grafana log :

logger=rendering renderer=http t=2025-03-07T06:58:54.048557399Z level=info msg=Rendering path="d-solo/fe84xuzicu6f4b?orgId=1&from=2025-02-28T06:58:30.306Z&to=2025-03-07T06:58:30.306Z&timezone=UTC&var-datasource=P23BF0D244A4CB62C&var-pipelinetype=PR&var-stagetype=Integration%20Tests&var-branch=develop&var-taskname=Post%20upgrade%20tests&panelId=panel-1&__feature.dashboardSceneSolo&width=1000&height=500&scale=1&tz=UTC" userID=1
logger=rendering renderer=http t=2025-03-07T06:58:54.050524376Z level=debug msg="calling remote rendering service" url="http://grafana-image-renderer:8081?deviceScaleFactor=1.000000&domain=grafana&encoding=png&height=500&renderKey=kw3hpOYyZ6UVWBkhUzNRh9Nn4LpQp5Pn&timeout=60&timezone=UTC&url=http%3A%2F%2Fgrafana%3A80%2Fd-solo%2Ffe84xuzicu6f4b%3ForgId%3D1%26from%3D2025-02-28T06%3A58%3A30.306Z%26to%3D2025-03-07T06%3A58%3A30.306Z%26timezone%3DUTC%26var-datasource%3DP23BF0D244A4CB62C%26var-pipelinetype%3DPR%26var-stagetype%3DIntegration%2520Tests%26var-branch%3Ddevelop%26var-taskname%3DPost%2520upgrade%2520tests%26panelId%3Dpanel-1%26__feature.dashboardSceneSolo%26width%3D1000%26height%3D500%26scale%3D1%26tz%3DUTC%26render%3D1&width=1000"
logger=rendering renderer=http t=2025-03-07T06:58:54.05511352Z level=debug msg="Successfully rendered image" path="d-solo/fe84xuzicu6f4b?orgId=1&from=2025-02-28T06:58:30.306Z&to=2025-03-07T06:58:30.306Z&timezone=UTC&var-datasource=P23BF0D244A4CB62C&var-pipelinetype=PR&var-stagetype=Integration%20Tests&var-branch=develop&var-taskname=Post%20upgrade%20tests&panelId=panel-1&__feature.dashboardSceneSolo&width=1000&height=500&scale=1&tz=UTC"

image render log:

{"level":"debug","message":"::ffff:10.244.0.21 - - [07/Mar/2025:07:02:19 +0000] \"GET /?deviceScaleFactor=1.000000&domain=grafana&encoding=png&height=500&renderKey=zZCNp2Q7LraeIsMu4lKSndRy5LjZEDIw&timeout=60&timezone=UTC&url=http%3A%2F%2Fgrafana%3A80%2Fd-solo%2Ffe84xuzicu6f4b%3ForgId%3D1%26from%3D2025-02-28T06%3A58%3A30.306Z%26to%3D2025-03-07T06%3A58%3A30.306Z%26timezone%3DUTC%26var-datasource%3DP23BF0D244A4CB62C%26var-pipelinetype%3DPR%26var-stagetype%3DIntegration%2520Tests%26var-branch%3Ddevelop%26var-taskname%3DPost%2520upgrade%2520tests%26panelId%3Dpanel-1%26__feature.dashboardSceneSolo%26width%3D1000%26height%3D500%26scale%3D1%26tz%3DUTC%26render%3D1&width=1000 HTTP/1.1\" 200 22 \"-\" \"Grafana/11.5.1\"\n"}

Environment:

• Grafana Image Renderer version: latest
• Grafana version: 11.5.1
• Installed plugin or remote renderer service: remote
• OS Grafana Image Renderer is installed on:
• User OS & Browser: Chrome
• Others:

[evictorero]

Hi @Huimintai, which image renderer version are you using, or which was the latest at the time when you tested?
Was this working before, or is it a brand-new installation?
Can you try adding /render at the end of your GF_RENDERING_SERVER_URL value ?

[Huimintai]

Hi @Huimintai, which image renderer version are you using, or which was the latest at the time when you tested? Was this working before, or is it a brand-new installation? Can you try adding /render at the end of your GF_RENDERING_SERVER_URL value ?

This is the image: grafana/grafana-image-renderer:latest which I used and this is the first time I try to test the remote call.

[evictorero]

Yes, but latest depends on the moment where you download it, it is not a version itself.
However, I don't think this is related to the version, I think the configuration is wrong, please update the GF_RENDERING_SERVER_URL and try again.

[evictorero]

I couldn't reproduce it. Feel free to open a new issue if the problem persists.