Merge branch 'nagyv-gitlab-master-patch-42782' into 'master'

Added available metrics to cluster cost management docs

See merge request gitlab-org/gitlab!44899

doc/user/clusters/cost_management.md

@@ -53,3 +53,20 @@ this dashboard.
 You can customize the cost dashboard by editing the `.gitlab/dashboards/default_costs.yml`
 file or creating similar dashboard configuration files. To learn more, read about
 [customizing dashboards in our documentation](/ee/operations/metrics/dashboards/).
+
+#### Available metrics
+
+Metrics contain both instance and node labels. The instance label will be deprecated in a future version.
+
+- `node_cpu_hourly_cost` - Hourly cost per vCPU on this node.
+- `node_gpu_hourly_cost` - Hourly cost per GPU on this node.
+- `node_ram_hourly_cost` - Hourly cost per gigabyte of memory on this node.
+- `node_total_hourly_cost` - Total node cost per hour.
+- `container_cpu_allocation` - Average number of CPUs requested/used over the previous minute.
+- `container_gpu_allocation` - Average number of GPUs requested over the previous minute.
+- `container_memory_allocation_bytes` - Average bytes of RAM requested/used over the previous minute.
+- `pod_pvc_allocation` - Bytes provisioned for a PVC attached to a pod.
+- `pv_hourly_cost` - Hourly cost per GP on a persistent volume.
+
+Some examples are provided in the
+[`kubecost-cost-model` repository](https://gitlab.com/gitlab-examples/kubecost-cost-model/-/blob/master/PROMETHEUS.md#example-queries).