Include ImageID in Resource attributes detected by k8sattributes processor

[evantorrie]

Component(s)

k8sattributes procesor

Is your feature request related to a problem? Please describe.

We currently make use of the k8sattributes processor to augment Resource attributes from pods running in our k8s clusters.

We are interested in obtaining the full sha256 digest version of the image associated with the container in a Kubernetes pod that is emitting telemetry, rather than relying on just the image name + tag.

Describe the solution you'd like

If we include container.id in the k8sattributes::metadata array, we'd like to get not only container.image.name, container.image.tag, but also container.image.digest added to the resource for that signal.

Describe alternatives you've considered

Scrape information from kube-state-metrics (which does provide the image digest) and somehow cross-join that with the resource attributes determined by k8sattributes processor?

Additional context

Currently it seems like the k8sattributes processor extracts the image name and image tag from the v1.Pod.Spec.Containers data structure. The image digest is available in v1.Pod.Status.ContainerStatuses[].ImageID.

[github-actions]

Pinging code owners for processor/k8sattributes: @dmitryax @rmfitzpatrick @fatsheep9146 @TylerHelmuth. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[TylerHelmuth]

This seems reasonable to me