Add Kubernetes attributes to OpenTelemetry data

[AlanMasciangelo]

Description

Add Kubernetes attributes to telemetry data when using the Quarkus Kubernetes and OpenTelemetry plugins.

OpenTelemetry defines a set of attributes useful for telemetry data for Kubernetes workloads as part of their "Kubernetes Collector". The attributes included with spans to understand where the span came from and additional context. Default attributes are:

• k8s.namespace.name
• k8s.pod.name
• k8s.pod.uid
• k8s.pod.start_time
• k8s.deployment.name
• k8s.node.name

Currently, otel resource attributes can be used to add some of this data. For example, setting quarkus.otel.resource.attributes="k8s.pod.name=${HOSTNAME}".

Implementation ideas

This could be implemented as a Resource which retrieves the necessary information via the kube api

[quarkus-bot]

/cc @brunobat (opentelemetry), @geoand (kubernetes), @iocanel (kubernetes), @radcortez (opentelemetry)

[geoand]

@AlanMasciangelo would you be willing to contribute this feature?