add prometheus stack

Signed-off-by: Michael Thomson <michael@michaelthomson.dev>

bootstrap/helmrepositories/helmrepository-prometheus-community.yaml

@@ -0,0 +1,8 @@
+apiVersion: source.toolkit.fluxcd.io/v1beta2
+kind: HelmRepository
+metadata:
+  name: prometheus-community
+  namespace: flux-system
+spec:
+  interval: 15m
+  url: https://prometheus-community.github.io/helm-charts

bootstrap/kustomizations/kustomization-kube-prometheus-stack.yaml

@@ -0,0 +1,18 @@
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: kube-prometheus-stack
+  namespace: flux-system
+spec:
+  interval: 15m
+  path: ./kube-prometheus-stack
+  prune: true # remove any elements later removed from the above path
+  timeout: 2m # if not set, this defaults to interval duration, which is 1h
+  sourceRef:
+    kind: GitRepository
+    name: flux-system
+  healthChecks:
+    - apiVersion: helm.toolkit.fluxcd.io/v2beta1
+      kind: HelmRelease
+      name: kube-prometheus-stack
+      namespace: kube-prometheus-stack

bootstrap/namespaces/namespace-kube-prometheus-stack.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: kube-prometheus-stack

kube-prometheus-stack/dns-endpoint-grafana.yaml

@@ -0,0 +1,12 @@
+apiVersion: externaldns.k8s.io/v1alpha1
+kind: DNSEndpoint
+metadata:
+  name: grafana.michaelthomson.dev
+  namespace: kube-prometheus-stack
+spec:
+  endpoints:
+  - dnsName: grafana.michaelthomson.dev
+    recordTTL: 180
+    recordType: CNAME
+    targets:
+    - server.michaelthomson.dev

kube-prometheus-stack/helmrelease-kube-prometheus-stack.yaml

@@ -0,0 +1,32 @@
+apiVersion: helm.toolkit.fluxcd.io/v2beta1
+kind: HelmRelease
+metadata:
+  name: kube-prometheus-stack
+  namespace: kube-prometheus-stack
+spec:
+  chart:
+    spec:
+      chart: kube-prometheus-stack
+      version: 63.x
+      sourceRef:
+        kind: HelmRepository
+        name: prometheus-community
+        namespace: flux-system
+  interval: 15m
+  timeout: 5m
+  releaseName: kube-prometheus-stack
+  values:
+    grafana:
+      ingress:
+        enabled: true
+        annotations:
+          traefik.ingress.kubernetes.io/router.tls: "true"
+          traefik.ingress.kubernetes.io/router.entrypoints: websecure
+          traefik.ingress.kubernetes.io/router.middlewares: traefik-authentik@kubernetescrd
+        hosts:
+        - grafana.michaelthomson.dev
+        path: /
+        tls:
+          - secretName: letsencrypt-wildcard-cert-michaelthomson.dev
+            hosts:
+              - grafana.michaelthomson.dev