Drop excessive cAdvisor metrics from kube-prometheus-stack helm chart.

kubeApiServer_values.yaml

# Taken from https://bugzilla.redhat.com/show_bug.cgi?id=1801154
kubeApiServer:
  serviceMonitor:
    metricRelabelings:
    - action: drop
      regex: apiserver_request_duration_seconds_bucket;(0.15|0.25|0.3|0.35|0.4|0.45|0.6|0.7|0.8|0.9|1.25|1.5|1.75|2.5|3|3.5|4.5|6|7|8|9|15|25|30|50)
      sourceLabels:
      - __name__
      - le

values.yaml

kubelet:
  serviceMonitor:
    cAdvisorMetricRelabelings:
      # Drop less useful container CPU metrics.
      - sourceLabels: [__name__]
        action: drop
        regex: 'container_cpu_(cfs_throttled_seconds_total|load_average_10s|system_seconds_total|user_seconds_total)'
      # Drop less useful container / always zero filesystem metrics.
      - sourceLabels: [__name__]
        action: drop
        regex: 'container_fs_(io_current|io_time_seconds_total|io_time_weighted_seconds_total|reads_merged_total|sector_reads_total|sector_writes_total|writes_merged_total)'
      # Drop less useful / always zero  container memory metrics.
      - sourceLabels: [__name__]
        action: drop
        regex: 'container_memory_(mapped_file|swap)'
      # Drop less useful container process metrics.
      - sourceLabels: [__name__]
        action: drop
        regex: 'container_(file_descriptors|tasks_state|threads_max)'
      # Drop container spec metrics that overlap with kube-state-metrics.
      - sourceLabels: [__name__]
        action: drop
        regex: 'container_spec.*'
      # Drop cgroup metrics with no pod.
      - sourceLabels: [id, pod]
        action: drop
        regex: '.+;'
      # Drop cgroup metrics with no container.
      - sourceLabels: [id, container]
        action: drop
        regex: '.+;'