Add image rendering sidecar

This PS is to add a sidecar for the grafana image renderer. Starting
with Grafana v10 it will be necessary to use an image rendering plugin
or remote renderer.

https://grafana.com/docs/grafana/latest/setup-grafana/image-rendering/

Change-Id: I4ebdac84769a646fa8154f80aaa2692c9f89eeb8

grafana/Chart.yaml

@@ -15,7 +15,7 @@ apiVersion: v1
 appVersion: v9.2.10
 description: OpenStack-Helm Grafana
 name: grafana
-version: 0.1.23
+version: 0.1.24
 home: https://grafana.com/
 sources:
   - https://github.com/grafana/grafana

grafana/templates/deployment.yaml

@@ -51,6 +51,18 @@ spec:
         {{ .Values.labels.grafana.node_selector_key }}: {{ .Values.labels.grafana.node_selector_value | quote }}
       initContainers:
 {{ tuple $envAll "grafana" list | include "helm-toolkit.snippets.kubernetes_entrypoint_init_container"  | indent 8 }}
+{{- if .Values.conf.grafana.image_rendering_sidecar.enabled }}
+        - name: grafana-image-renderer
+{{ tuple $envAll "grafana_image_renderer" | include "helm-toolkit.snippets.image" | indent 10 }}
+          restartPolicy: Always
+          ports:
+            - containerPort: {{ tuple "grafana" "image_rendering" "grafana" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
+          readinessProbe:
+            tcpSocket:
+              port: {{ tuple "grafana" "image_rendering" "grafana" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
+            initialDelaySeconds: 15
+            periodSeconds: 10
+{{- end }}
       containers:
         - name: grafana
 {{ tuple $envAll "grafana" | include "helm-toolkit.snippets.image" | indent 10 }}
@@ -88,6 +100,12 @@ spec:
                   key: ca.crt
                   name: prometheus-tls-api
 {{- end }}
+{{- if .Values.conf.grafana.image_rendering_sidecar.enabled }}
+            - name: GF_RENDERING_SERVER_URL
+              value: "http://localhost:{{ tuple "grafana" "image_rendering" "grafana" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}/render"
+            - name: GF_RENDERING_CALLBACK_URL
+              value: "http://localhost:{{ tuple "grafana" "internal" "grafana" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}"
+{{- end }}
 {{- if .Values.pod.env.grafana }}
 {{ include "helm-toolkit.utils.to_k8s_env_vars" .Values.pod.env.grafana | indent 12 }}
 {{- end }}

grafana/values.yaml

@@ -24,6 +24,7 @@ images:
     grafana_db_session_sync: docker.io/openstackhelm/heat:stein-ubuntu_bionic
     selenium_tests: docker.io/openstackhelm/osh-selenium:latest-ubuntu_focal
     image_repo_sync: docker.io/library/docker:17.07.0
+    grafana_image_renderer: docker.io/grafana/grafana-image-renderer:3.10.5
   pull_policy: IfNotPresent
   local_registry:
     active: false
@@ -287,6 +288,7 @@ endpoints:
       grafana:
         default: 3000
         public: 80
+        image_rendering: 8081
   monitoring:
     name: prometheus
     namespace: null
@@ -503,6 +505,8 @@ conf:
       enabled: false
     unified_alerting:
       enabled: true
+    image_rendering_sidecar:
+      enabled: false
     analytics:
       reporting_enabled: false
       check_for_updates: false

releasenotes/notes/grafana.yaml

@@ -24,4 +24,5 @@ grafana:
   - 0.1.21 Fix run migrator job deployment condition
   - 0.1.22 Make selenium v4 syntax optional
   - 0.1.23 Modified selenium test for compatibility
+  - 0.1.24 Add image rendering sidecar
 ...