helm install prometheus-stack and prometheus-adapter

This is how to install prometheus-stack and prometheus-adapter without alert manager.

1. create helm values file for prometheus-stack: server.yaml

#server.yaml
defaultRules:
  create: true
  rules:
    alertmanager: false
    etcd: false
    configReloaders: true
    general: true
    k8s: true
    kubeApiserver: true
    kubeApiserverAvailability: true
    kubeApiserverSlos: false
    kubelet: true
    kubeProxy: false
    kubePrometheusGeneral: true
    kubePrometheusNodeRecording: false
    kubernetesApps: true
    kubernetesResources: true
    kubernetesStorage: true
    kubernetesSystem: true
    kubeScheduler: true
    kubeStateMetrics: true
    network: true
    node: true
    nodeExporterAlerting: false
    nodeExporterRecording: false
    prometheus: true
    prometheusOperator: false
kubeProxy:
  enabled: false
alertmanager:
  enabled: false
prometheus:
  prometheusSpec:
    retention: 3d
    retentionSize: 2GB
    storageSpec:
      volumeClaimTemplate:
        spec:
          accessModes:
          - ReadWriteOnce
          resources:
            requests:
              storage: 5Gi

2. create helm values file for prometheus-adapter: adapter.yaml

prometheus:
  url: http://nick-prometheus-stack-kube-prometheus.monitor.svc.cluster.local
  port: 9090
rules:
  resource:
    cpu:
      containerLabel: container
      containerQuery: sum(rate(container_cpu_usage_seconds_total{<<.LabelMatchers>>,
        container!=""}[3m])) by (<<.GroupBy>>)
      nodeQuery: sum(rate(container_cpu_usage_seconds_total{<<.LabelMatchers>>, id='/'}[3m]))
        by (<<.GroupBy>>)
      resources:
        overrides:
          namespace:
            resource: namespace
          node:
            resource: node
          pod:
            resource: pod
    memory:
      containerLabel: container
      containerQuery: sum(container_memory_working_set_bytes{<<.LabelMatchers>>, container!=""})
        by (<<.GroupBy>>)
      nodeQuery: sum(container_memory_working_set_bytes{<<.LabelMatchers>>,id='/'})
        by (<<.GroupBy>>)
      resources:
        overrides:
          namespace:
            resource: namespace
          node:
            resource: node
          pod:
            resource: pod
    window: 3m

note1: update prometheus URL to your setting

last step: helm install

helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
helm install nick-prometheus-stack -f server.yaml prometheus-community/kube-prometheus-stack --create-namespace -n monitor
helm install nick-prometheus-adapter -f adapter.yaml prometheus-community/prometheus-adapter  --create-namespace -n monitor

result:

$ k top node --use-protocol-buffers
NAME            CPU(cores)   CPU%   MEMORY(bytes)   MEMORY%   
nick-nmt-0001   270m         18%    1886Mi          66%       
nick-nmt-0002   117m         7%     1669Mi          58%