How to find version of grafana-image-renderer in the container

Grafana Installation
,
1

Hi everyone,

I suspect this is a very easy question:
How can I verify which version of the image is running in the docker container?

I am running the grafana-image-renderer in a docker (well podman) container and am pulling the latest image.
When I do an update, how can I verify that the latest image is indeed the desired version (at time of this post 4.1.4)?
I found the plugin.js file in the /…/storage/overlay/…/home/nonroot/ directory but there surely is a way to ask the container itself.
Or a curl request?

If not, maybe it could be possible to print the version into the log-file? podman container logs renderer

Best regards
Frank

2

There is plugin.json, where you have details. E.g. this latest is 4.1.4:

docker run --rm -ti --entrypoint cat grafana/grafana-image-renderer:latest "plugin.json"
{
  "type": "renderer",
  "name": "Grafana Image Renderer",
  "id": "grafana-image-renderer",
  "backend": true,
  "info": {
    "description": "Grafana Backend Image Renderer that uses headless chrome to capture images.",
    "author": {
      "name": "Grafana Labs",
      "url": "https://grafana.com"
    },
    "keywords": ["renderer", "png", "backend", "image"],
    "logos": {
      "small": "img/icon.png",
      "large": "img/icon.png"
    },
    "links": [
      {
        "name": "Project site",
        "url": "https://github.com/grafana/grafana-image-renderer"
      },
      {
        "name": "Apache License",
        "url": "https://github.com/grafana/grafana-image-renderer/blob/master/LICENSE"
      }
    ],
    "version": "4.1.4",
    "updated": "2025-10-30"
  },
  "dependencies": {
    "grafanaDependency": ">=11.3.8"
  }
}

IMHO: professionals don’t use image latest tag usually, but version tag explicitly.

3

Thank you.
This produces the same result as viewing the plugin.js from the overlay directory but with your solution at least I ask the container, what it thinks this file contains.

A simpler solution would be greatly appreciated, like an information in the logs or a --version command. Maybe one of the maintainer can put that in for a future release.

When it comes to docker and container (or even Linux for that matter) I would not describe myself as professional.
But I followed the instructions provided by the grafana / renderer documentation.
If it is bad practice to go for latest, maybe the documentation should mention this or should provide different solutions for the installation.