Add Grafana

grafana/README.md

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+# Grafana
+
+```
+kubectl create namespace grafana
+kubectl apply -n grafana -f application.yml
+```
+
+## OIDC secret
+
+See Authelia README on provisioning and updating OIDC secrets for Grafana
+
+## Grafana post deployment steps
+
+* Configure Prometheus datasource with URL set to
+  `http://prometheus-operated.prometheus-operator.svc.cluster.local:9090`
+* Configure Elasticsearch datasource with URL set to
+  `http://elasticsearch.elastic-system.svc.cluster.local`,
+  Time field name set to `timestamp` and
+  ElasticSearch version set to `7.10+`

grafana/application.yml

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+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: grafana-config
+data:
+  grafana.ini: |
+    [log]
+    level = warn
+    [server]
+    domain = grafana.k-space.ee
+    root_url = https://%(domain)s/
+    [auth.generic_oauth]
+    name = OAuth
+    icon = signin
+    enabled = true
+    client_id = grafana
+    scopes = openid profile email groups
+    empty_scopes = false
+    auth_url = https://auth.k-space.ee/api/oidc/authorize
+    token_url = https://auth.k-space.ee/api/oidc/token
+    api_url = https://auth.k-space.ee/api/oidc/userinfo
+    allow_sign_up = true
+    role_attribute_path = contains(groups[*], 'Grafana Admins') && 'Admin' || 'Viewer'
+---
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  labels:
+    app: grafana
+  name: grafana
+spec:
+  revisionHistoryLimit: 0
+  serviceName: grafana
+  selector:
+    matchLabels:
+      app: grafana
+  template:
+    metadata:
+      labels:
+        app: grafana
+    spec:
+      securityContext:
+        fsGroup: 472
+      containers:
+        - name: grafana
+          image: grafana/grafana:8.5.0
+          securityContext:
+            readOnlyRootFilesystem: true
+            runAsNonRoot: true
+            runAsUser: 472
+          envFrom:
+            - secretRef:
+                name: oidc-secret
+          ports:
+            - containerPort: 3000
+              name: http-grafana
+              protocol: TCP
+          readinessProbe:
+            failureThreshold: 3
+            httpGet:
+              path: /robots.txt
+              port: 3000
+              scheme: HTTP
+            initialDelaySeconds: 10
+            periodSeconds: 30
+            successThreshold: 1
+            timeoutSeconds: 2
+          livenessProbe:
+            failureThreshold: 3
+            initialDelaySeconds: 30
+            periodSeconds: 10
+            successThreshold: 1
+            tcpSocket:
+              port: 3000
+            timeoutSeconds: 1
+          resources:
+            requests:
+              cpu: 250m
+              memory: 750Mi
+          volumeMounts:
+            - mountPath: /var/lib/grafana
+              name: grafana-data
+            - mountPath: /etc/grafana
+              name: grafana-config
+      volumes:
+        - name: grafana-config
+          configMap:
+            name: grafana-config
+  volumeClaimTemplates:
+    - metadata:
+        name: grafana-data
+      spec:
+        storageClassName: longhorn
+        accessModes:
+          - ReadWriteOnce
+        resources:
+          requests:
+            storage: 1Gi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: grafana
+spec:
+  ports:
+    - port: 80
+      protocol: TCP
+      targetPort: http-grafana
+  selector:
+    app: grafana
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: grafana
+  annotations:
+    traefik.ingress.kubernetes.io/router.entrypoints: websecure
+    traefik.ingress.kubernetes.io/router.tls: "true"
+    external-dns.alpha.kubernetes.io/target: traefik.k-space.ee
+spec:
+  rules:
+  - host: grafana.k-space.ee
+    http:
+      paths:
+      - pathType: Prefix
+        path: "/"
+        backend:
+          service:
+            name: grafana
+            port:
+              number: 80
+  tls:
+  - hosts:
+    - "*.k-space.ee"