Upgrade Grafana to v6.0.0-beta2 and enable Explore UI

* Upgrade Grafana from v5.4.3 to v6.0.0-beta2
* Enable Grafana Explore UI while still using only the Viewer
role (inspect/edit without saving)
* http://docs.grafana.org/guides/whats-new-in-v6-0/

CHANGES.md

@@ -19,6 +19,9 @@ Notable changes between versions.
 * Improve Prometheus metrics labels and drop extraneous metrics ([#397](https://github.com/poseidon/typhoon/pull/397))
   * Add `pod` name label to metrics discovered via service endpoints
   * Rename `kubernetes_namespace` label to `namespace`
+* Revamp the Grafana addon ([#403](https://github.com/poseidon/typhoon/pull/403))
+  * Upgrade Grafana from v5.4.3 to 6.0.0-beta2
+  * Enable Grafana [Explore](http://docs.grafana.org/guides/whats-new-in-v6-0/#explore) UI as a Viewer (inspect/edit without saving)
 
 ## v1.13.3
 

addons/grafana/config.yaml

@@ -0,0 +1,36 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: grafana-config
+  namespace: monitoring
+data:
+  custom.ini: |+
+    [server]
+    http_port = 8080
+
+    [paths]
+    data    = /var/lib/grafana
+    plugins = /var/lib/grafana/plugins
+    provisioning = /etc/grafana/provisioning
+
+    [users]
+    allow_sign_up    = false
+    allow_org_create = false
+    # viewers can edit/inspect, but not save
+    viewers_can_edit = true
+
+    # Disable login form, since Grafana always creates an admin user
+    [auth]
+    disable_login_form = true
+
+    # Disable the user/pass login system
+    [auth.basic]
+    enabled = false
+
+    # Allow anonymous authentication with view-only authorization
+    [auth.anonymous]
+    enabled = true
+    org_role = Viewer
+
+    [analytics]
+    reporting_enabled = false

addons/grafana/datasources.yaml

@@ -10,7 +10,15 @@ data:
     - name: prometheus
       type: prometheus
       access: proxy
-      orgId: 1
       url: http://prometheus.monitoring.svc.cluster.local
       version: 1
       editable: false
+  loki.yaml: |+
+    apiVersion: 1
+    datasources:
+    - name: loki
+      type: loki
+      access: proxy
+      url: http://loki.monitoring.svc.cluster.local
+      version: 1
+      editable: false

addons/grafana/deployment.yaml

@@ -23,20 +23,10 @@ spec:
     spec:
       containers:
         - name: grafana
-          image: grafana/grafana:5.4.3
+          image: grafana/grafana:6.0.0-beta2
           env:
-            - name: GF_SERVER_HTTP_PORT
-              value: "8080"
-            - name: GF_AUTH_BASIC_ENABLED
-              value: "false"
-            - name: GF_AUTH_DISABLE_LOGIN_FORM
-              value: "true"
-            - name: GF_AUTH_ANONYMOUS_ENABLED
-              value: "true"
-            - name: GF_AUTH_ANONYMOUS_ORG_ROLE
-              value: Viewer
-            - name: GF_ANALYTICS_REPORTING_ENABLED
-              value: "false"
+            - name: GF_PATHS_CONFIG
+              value: "/etc/grafana/custom.ini"
           ports:
             - name: http
               containerPort: 8080
@@ -48,19 +38,24 @@ spec:
               memory: 200Mi
               cpu: 200m
           volumeMounts:
+            - name: config
+              mountPath: /etc/grafana
             - name: datasources
               mountPath: /etc/grafana/provisioning/datasources
-            - name: dashboard-providers
+            - name: providers
               mountPath: /etc/grafana/provisioning/dashboards
             - name: dashboards
-              mountPath: /var/lib/grafana/dashboards
+              mountPath: /etc/grafana/dashboards
       volumes:
+        - name: config
+          configMap:
+            name: grafana-config
         - name: datasources
           configMap:
             name: grafana-datasources
-        - name: dashboard-providers
+        - name: providers
           configMap:
-            name: grafana-dashboard-providers
+            name: grafana-providers
         - name: dashboards
           configMap:
             name: grafana-dashboards

addons/grafana/providers.yaml

@@ -1,10 +1,10 @@
 apiVersion: v1
 kind: ConfigMap
 metadata:
-  name: grafana-dashboard-providers
+  name: grafana-providers
   namespace: monitoring
 data:
-  dashboard-providers.yaml: |+
+  providers.yaml: |+
     apiVersion: 1
     providers:
     - name: 'default'
@@ -12,4 +12,4 @@ data:
       folder: ''
       type: file
       options:
-        path: /var/lib/grafana/dashboards
+        path: /etc/grafana/dashboards