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Install Grafana

Install Grafana

Install

  1. valuesファイルの修正

    • Ephemeral Storageの storageClass を OpenEBSのjiva storageのものとする( e.g. openebs-jiva-csi-default)

      Info

    • Grafana WebUIへのアクセスにMetalLBのexternal IPアドレスを使用する

      • service.type: LoadBalancer
      • annotations に metallb.universe.tf/address-pool: ip-pool
    mkdir -p ~/work/prometheus/grafana
curl -so ~/work/prometheus/grafana/grafana.yaml https://raw.githubusercontent.com/grafana/helm-charts/main/charts/grafana/values.yaml
vim ~/work/prometheus/grafana/grafana.yaml

    grafana.yaml 修正後のdiff 
    $ diff -u <(curl -s https://raw.githubusercontent.com/grafana/helm-charts/main/charts/grafana/values.yaml) <(cat ~/work/prometheus/grafana/grafana.yaml)
--- /dev/fd/63  2022-10-30 15:05:32.554153834 +0000
+++ /dev/fd/62  2022-10-30 15:05:32.566153656 +0000
@@ -157,12 +157,13 @@
 ##
 service:
   enabled: true
-  type: ClusterIP
+  type: LoadBalancer
   port: 80
   targetPort: 3000
     # targetPort: 4181 To be used with a proxy extraContainer
   ## Service annotations. Can be templated.
-  annotations: {}
+  annotations:
+    metallb.universe.tf/address-pool: ip-pool
   labels: {}
   portName: service
   # Adds the appProtocol field to the service. This allows to work with istio protocol selection. Ex: "http" or "tcp"
@@ -297,10 +297,10 @@
 persistence:
   type: pvc
   enabled: false
-  # storageClassName: default
+  storageClassName: openebs-jiva-csi-default
   accessModes:
     - ReadWriteOnce
-  size: 10Gi
+  size: 5Gi
   # annotations: {}
   finalizers:
     - kubernetes.io/pvc-protection
@@ -507,15 +507,14 @@
 ## Configure grafana datasources
 ## ref: http://docs.grafana.org/administration/provisioning/#datasources
 ##
-datasources: {}
-#  datasources.yaml:
-#    apiVersion: 1
-#    datasources:
-#    - name: Prometheus
-#      type: prometheus
-#      url: http://prometheus-prometheus-server
-#      access: proxy
-#      isDefault: true
+datasources:
+  datasources.yaml:
+    apiVersion: 1
+    datasources:
+    - name: Prometheus
+      type: prometheus
+      url: http://prometheus-server.monitoring.svc.cluster.local
+      isDefault: true
 #    - name: CloudWatch
 #      type: cloudwatch
 #      access: proxy

  2. install

    helm upgrade -i grafana grafana/grafana -n monitoring -f ~/work/prometheus/grafana/grafana.yaml

    実行ログ 
    $ helm upgrade -i grafana grafana/grafana -n monitoring -f ~/work/prometheus/grafana/grafana.yaml
Release "grafana" does not exist. Installing it now.
W1030 15:08:59.041312  221007 warnings.go:70] policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+
W1030 15:08:59.265293  221007 warnings.go:70] policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+
NAME: grafana
LAST DEPLOYED: Sun Oct 30 15:08:54 2022
NAMESPACE: monitoring
STATUS: deployed
REVISION: 1
NOTES:
1. Get your 'admin' user password by running:

   kubectl get secret --namespace monitoring grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo

2. The Grafana server can be accessed via port 80 on the following DNS name from within your cluster:

   grafana.monitoring.svc.cluster.local

   Get the Grafana URL to visit by running these commands in the same shell:
NOTE: It may take a few minutes for the LoadBalancer IP to be available.
        You can watch the status of by running 'kubectl get svc --namespace monitoring -w grafana'
     export SERVICE_IP=$(kubectl get svc --namespace monitoring grafana -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
     http://$SERVICE_IP:80

3. Login with the password from step 1 and the username: admin
#################################################################################
######   WARNING: Persistence is disabled!!! You will lose your data when   #####
######            the Grafana pod is terminated.                            #####
#################################################################################

  3. grafana ServiceのMetalLBで払い出されたExternal IPアドレスを確認する 

    kubectl get service -n monitoring grafana -o jsonpath='{.status.loadBalancer.ingress[0].ip}'

  4. ブラウザからアクセス

    1. ログイン画面
      username admin
      password grafanaインストール時の表示を参考に以下コマンドでadmin の password を取得

      kubectl get secret --namespace monitoring grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo

    2. ログイン成功

Install Node Exporter Full Dashboards

grafanaと一緒にインストールする場合

Info

  1. valuesファイルの修正 

    vim ~/work/prometheus/grafana/grafana.yaml

    grafana.yaml 修正後のdiff(cadvisor-exporter Dashboardも入れている例です) 
    $ diff -u <(curl -s https://raw.githubusercontent.com/grafana/helm-charts/main/charts/grafana/values.yaml) <(cat ~/work/prometheus/grafana/grafana.yaml)

~ snip ~

@@ -632,7 +632,17 @@
 ##
 ## dashboards per provider, use provider name as key.
 ##
-dashboards: {}
+dashboards:
+  default:
+    node-exporter-full:
+      # https://grafana.com/grafana/dashboards/1860-node-exporter-full/
+      gnetId: 1860
+      datasource: Prometheus
+    cadvisor-exporter:
+      # https://grafana.com/grafana/dashboards/14282-cadvisor-exporter/
+      gnetId: 14282
+      datasource: Prometheus
+
   # default:
   #   some-dashboard:
   #     json: |

  2. install 

    helm upgrade -i grafana grafana/grafana -n monitoring -f ~/work/prometheus/grafana/grafana.yaml

  3. grafanaコンテナ:/var/lib/grafana/dashboards/default/ に Dashboard定義であるjsonファイルが配置済みであることを確認 

    $ kubectl exec -it -c grafana -n monitoring grafana-5f4c7d46db-xtktb -- ls -l /var/lib/grafana/dashboards/default/
total 232
-rw-r--r--    1 grafana  472          18484 Nov  8 16:03 cadvisor-exporter.json
-rw-r--r--    1 grafana  472         215154 Nov  8 16:03 node-exporter-full.json

手動でインストールする場合

  1. Dashboardsページにアクセス
  2. New -> New Dashboard -> Import を選択
  3. Node Exporter Full の Dashboard IDを入力
  4. Import を実行する
  5. Node Exporter Full が表示されることを確認