Supports Host Process Container metrics

[laozc]

Problem Statement

Currently the container metrics only collects HCS container.
https://github.com/prometheus-community/windows_exporter/blob/master/internal/collector/container/container.go#L220-L223

HPC is supported since 1.26 in Kubernetes
https://kubernetes.io/docs/tasks/configure-pod-container/create-hostprocess-pod/

HPC container not implemented in HCS container on Windows
so the user won't be able to get any metrics if the container is deployed as HPC.

Proposed Solution

No response

Additional information

No response

Acceptance Criteria

No response

[jkroepke]

Thats currently expected and unknown, how to gain metrics about everything.

Additionally, it unknown to me, if the V1 API supports Job containers

ref: microsoft/hcsshim#2370

[jkroepke]

It turns out that Host Process Containers are Win32 Job Objects. It's not in the responsibility of the HCS. containerd/runc binary directly invoke the Win32 Job Object API. the hcsshim library handle the host process containers internally as job container.

Not sure, if I should add a generic collector for job objects, since Job objects are used by other software components, e.g. kubelet and MSSQL. That may confused end-users, but from Windows point of view, normal containers and hostprocess containers are using distinct Windows APIs.