[grafana] Implement Gateway API

Signed-off-by: Jan-Otto Kröpke <mail@jkroepke.de>

.github/workflows/lint-test.yaml

@@ -72,6 +72,10 @@ jobs:
           kubectl_version: ${{ inputs.kind_kubectl_version }}
           node_image: ${{ inputs.kind_node_image }}
 
+      - name: Apply Gateway API CRDs
+        if: steps.list-changed.outputs.changed == 'true'
+        run: kubectl apply -k https://github.com/kubernetes-sigs/gateway-api/config/crd
+
       - name: Run chart-testing (install)
         run: |
           changed=$(ct list-changed --config "${CT_CONFIGFILE}")

charts/grafana/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
 name: grafana
-version: 8.5.11
+version: 8.6.0
 appVersion: 11.3.0
 kubeVersion: "^1.8.0-0"
 description: The leading tool for querying and visualizing time series and metrics.

charts/grafana/ci/with-nondefault-values.yaml

@@ -4,3 +4,29 @@ ingress:
   enabled: true
   hosts:
     - monitoring-{{ .Values.global.environment }}.example.com
+
+route:
+  main:
+    enabled: true
+    labels:
+      app: monitoring-prometheus
+    hostnames:
+      - "*.example.com"
+      - "{{ .Values.global.environment }}.example.com"
+    filters:
+      - type: RequestHeaderModifier
+        requestHeaderModifier:
+          set:
+            - name: my-header-name
+              value: my-new-header-value
+    additionalRules:
+      - filters:
+          - type: RequestHeaderModifier
+            requestHeaderModifier:
+              set:
+                - name: my-header-name
+                  value: my-new-header-value
+        matches:
+          - path:
+              type: PathPrefix
+              value: /foo/

charts/grafana/templates/route.yaml

@@ -0,0 +1,44 @@
+{{- range $name, $route := .Values.route }}
+  {{- if $route.enabled -}}
+---
+apiVersion: {{ $route.apiVersion | default "gateway.networking.k8s.io/v1" }}
+kind: {{ $route.kind | default "HTTPRoute" }}
+metadata:
+  {{- with $route.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+  name: {{ template "grafana.fullname" $ }}{{ if ne $name "main" }}-{{ $name }}{{ end }}
+  namespace: {{ template "grafana.namespace" $ }}
+  labels:
+    app: {{ template "grafana.name" $ }}-prometheus
+    {{- include "grafana.labels" $ | nindent 4 }}
+    {{- with $route.labels }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
+spec:
+  {{- with $route.parentRefs }}
+  parentRefs:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+  {{- with $route.hostnames }}
+  hostnames:
+    {{- tpl (toYaml .) $ | nindent 4 }}
+  {{- end }}
+  rules:
+    {{- if $route.additionalRules }}
+    {{- tpl (toYaml $route.additionalRules) $ | nindent 4 }}
+    {{- end }}
+    - backendRefs:
+        - name: {{ include "grafana.fullname" $ }}
+          port: {{ $.Values.service.port }}
+      {{- with $route.filters }}
+      filters:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with $route.matches }}
+      matches:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+  {{- end }}
+{{- end }}

charts/grafana/values.yaml

@@ -311,6 +311,42 @@ ingress:
   #    hosts:
   #      - chart-example.local
 
+# -- BETA: Configure the gateway routes for the chart here.
+# More routes can be added by adding a dictionary key like the 'main' route.
+# Be aware that this is an early beta of this feature,
+# kube-prometheus-stack does not guarantee this works and is subject to change.
+# Being BETA this can/will change in the future without notice, do not use unless you want to take that risk
+# [[ref]](https://gateway-api.sigs.k8s.io/references/spec/#gateway.networking.k8s.io%2fv1alpha2)
+route:
+  main:
+    # -- Enables or disables the route
+    enabled: false
+
+    # -- Set the route apiVersion, e.g. gateway.networking.k8s.io/v1 or gateway.networking.k8s.io/v1alpha2
+    apiVersion: gateway.networking.k8s.io/v1
+    # -- Set the route kind
+    # Valid options are GRPCRoute, HTTPRoute, TCPRoute, TLSRoute, UDPRoute
+    kind: HTTPRoute
+
+    annotations: {}
+    labels: {}
+
+    hostnames: []
+    # - my-filter.example.com
+    parentRefs: []
+    # - name: acme-gw
+
+    matches:
+      - path:
+          type: PathPrefix
+          value: /
+
+    ## Filters define the filters that are applied to requests that match this rule.
+    filters: []
+
+    ## Additional custom rules that can be added to the route
+    additionalRules: []
+
 resources: {}
 #  limits:
 #    cpu: 100m