[k8s_events] label support for namespace related events

[fc92]

Component(s)

No response

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

k8s_events related to namespaces are currently missing labels, which are important for filters in the context of Kubernetes.

Describe the solution you'd like

Use k8s_cluster and k8s_events receivers, and k8s_atributes processor to inject labels to k8s_events logs related to a given k8s.object.type

Example: inject namespace labels on logs related to namespaces

Describe alternatives you've considered

An alternative could be to configure k8s_events directly to collect labels, without k8s_cluster receiver and k8s_attributes processor

Additional context

No response

[github-actions]

Pinging code owners for receiver/k8sobjects: @dmitryax @hvaghani221 @TylerHelmuth @ChrsMark. See Adding Labels via Comments if you do not have permissions to add labels yourself. For example, comment '/label priority:p2 -needs-triaged' to set the priority and remove the needs-triaged label.

[github-actions]

Pinging code owners for receiver/k8sevents: @dmitryax @TylerHelmuth @ChrsMark. See Adding Labels via Comments if you do not have permissions to add labels yourself. For example, comment '/label priority:p2 -needs-triaged' to set the priority and remove the needs-triaged label.

[ChrsMark]

Probably that would be doable at

opentelemetry-collector-contrib/receiver/k8seventsreceiver/k8s_event_to_logdata.go

Line 32 in d86dc34

func k8sEventToLogData(logger *zap.Logger, ev *corev1.Event) plog.Logs {

by retrieving the labels from the Event's ObjectMeta: https://github.com/kubernetes/api/blob/f78f1754d9369a889faaef4f9b7655bd857c0607/events/v1beta1/types.go#L41.

The labels should go under k8s.pod.label.* when object kind is Pod. For other type of objects we don't have a SemConv attribute defined yet so I would keep that part out for now.