Area(s)

area:k8s

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

At the moment, there are no Semantic Conventions defined for k8s metrics.

Describe the solution you'd like

Even if we cannot consider the k8s metrics as stable we can start considering adding metrics that are not controversial to get some progress here. This issue aims to collect the existing k8s metrics that exist in the Collector and keep track of any related work.
Bellow I'm providing an initial list with metrics coming from the kubeletstats and k8scluster receivers. Note that these are matter to change with the time being, so we should be getting back to the Collector to verify the current state.

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

Describe alternatives you've considered

No response

Additional context

Below there are some metrics from namespaces other than k8s.* as well. I leave them in there intentionally in order to take them into account accordingly.

kubeletstats metrics

cpu metrics: #1489 ✅
memory metrics: #1490 ✅
filesystem metrics: #1488 ✅
network metrics: #1487 ✅
uptime metrics: #1486 ✅
volume metrics: #1485 ✅

k8scluster metrics

deployment metrics: #1636 ✅

cronjob metrics: #1660 ✅

k8s.cronjob.active_jobs

daemonset metrics: #1649 ✅

k8s.daemonset.current_scheduled_nodes
k8s.daemonset.desired_scheduled_nodes
k8s.daemonset.misscheduled_nodes
k8s.daemonset.ready_nodes

hpa metrics: #1644 ✅

k8s.hpa.max_replicas
k8s.hpa.min_replicas
k8s.hpa.current_replicas
k8s.hpa.desired_replicas

job metrics: #1660 ✅

k8s.job.active_pods
k8s.job.desired_successful_pods
k8s.job.failed_pods
k8s.job.max_parallel_pods
k8s.job.successful_pods

namespace metrics: #1668 ✅

k8s.namespace.phase

replicaset metrics: #1636 ✅

k8s.replicaset.desired
k8s.replicaset.available

replication_controller metrics #1636 ✅

k8s.replication_controller.desired
k8s.replication_controller.available

statefulset metrics: #1637 ✅

k8s.statefulset.desired_pods
k8s.statefulset.ready_pods
k8s.statefulset.current_pods
k8s.statefulset.updated_pods

container metrics #2074 ✅

k8s.container.cpu_request
k8s.container.cpu_limit
k8s.container.memory_request
k8s.container.memory_limit
k8s.container.storage_request
k8s.container.storage_limit
k8s.container.ephemeralstorage_request
k8s.container.ephemeralstorage_limit
k8s.container.restarts
k8s.container.ready

pod metrics #2075 ✅

k8s.pod.phase
k8s.pod.status_reason

resource_quota metrics #2076 ✅

k8s.resource_quota.hard_limit
k8s.resource_quota.used

node metrics #2077 ✅

k8s.node.condition

related issue: open-telemetry/opentelemetry-collector-contrib#33760

Openshift metrics #2078 ✅

openshift.clusterquota.limit
openshift.clusterquota.used
openshift.appliedclusterquota.limit
openshift.appliedclusterquota.used

Related issues

TBA