Add container.health and container.status to container attributes

[Markus78]

Area(s)

area:container

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

It is usefull to be able to the tell the health and status of running containers in docker or podman. These attributes would make it easier to keep track of the status of containers and their health.

Describe the solution you'd like

I would like 2 new attributes for containers

Name: container.health integer with the following definitions

Value	Description
-1	unknown ( no healthcheck exists )
0	healthy
1	unhealthy
2	starting

Name: container.status integer with the following definitions

Value	Description
-1	unknown
0	created
1	error
2	exited
3	paused
4	running
5	degraded
6	stopped

These 2 attributes makes overview of running containers possible. Inspiration from prometheus-podman-exporter

Describe alternatives you've considered

No response

Additional context

No response

[ChrsMark]

Hey @Markus78!

Could these be modeled as metrics like the hw.status in https://opentelemetry.io/docs/specs/semconv/system/hardware-metrics/#hwbattery---battery-metrics as it was suggested at #1032 (comment)?

My second question is if these two metrics could be re-used as K8s related metrics as well. For example there is https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/receiver/k8sclusterreceiver/documentation.md#k8scontainerready but I'm not sure if we could expand here and have a common set of metrics for both K8s and generic containers. Also there is open-telemetry/opentelemetry-collector-contrib#35668. @povilasv do you have any thoughts on this?

/cc @open-telemetry/semconv-container-approvers @open-telemetry/semconv-k8s-approvers