Add kube-prometheus-stack helm chart

cluster/apps/kustomization.yaml

@@ -8,3 +8,4 @@ resources:
 - ./management
 - ./tools
 - ./irc
+- ./monitoring

cluster/apps/monitoring/kube-prometheus-stack/helm-release.yaml

@@ -0,0 +1,79 @@
+apiVersion: helm.toolkit.fluxcd.io/v2beta1
+kind: HelmRelease
+metadata:
+  name: kube-prometheus-stack
+  namespace: monitoring
+spec:
+  interval: 5m
+  chart:
+    spec:
+      chart: kube-prometheus-stack
+      version: 45.10.x
+      sourceRef:
+        kind: HelmRepository
+        name: prometheus-community-charts
+        namespace: flux-system
+
+  values:
+
+    # Temporarily disable
+    alertmanager:
+      ingress:
+        enabled: true
+        annotations:
+          cert-manager.io/cluster-issuer: letsencrypt-production
+          traefik.ingress.kubernetes.io/router.entrypoints: websecure
+          traefik.ingress.kubernetes.io/router.middlewares: traefik-authentik@kubernetescrd
+        hosts:
+          - host: &alertmanager-host alertmanager.${SECRET_NEW_DOMAIN}
+            paths:
+              - path: /
+                pathType: Prefix
+                service:
+                  number: 9093
+        tls:
+          - hosts:
+              - *alertmanager-host
+            secretName: wildcard-main-tls
+
+    grafana:
+      ingress:
+        enabled: true
+        annotations:
+          cert-manager.io/cluster-issuer: letsencrypt-production
+          traefik.ingress.kubernetes.io/router.entrypoints: websecure
+          traefik.ingress.kubernetes.io/router.middlewares: traefik-authentik@kubernetescrd
+        hosts:
+          - host: &grafana-host grafana.${SECRET_NEW_DOMAIN}
+            paths:
+              - path: /
+                pathType: Prefix
+                service:
+                  name: http-web
+        tls:
+          - hosts:
+              - *grafana-host
+            secretName: wildcard-main-tls
+
+    # Enable this when the cluster expands to have more than a single node
+    kubeEtcd:
+      enabled: false
+
+    prometheus:
+      ingress:
+        enabled: true
+        annotations:
+          cert-manager.io/cluster-issuer: letsencrypt-production
+          traefik.ingress.kubernetes.io/router.entrypoints: websecure
+          traefik.ingress.kubernetes.io/router.middlewares: traefik-authentik@kubernetescrd
+        hosts:
+          - host: &prometheus-host metrics.${SECRET_NEW_DOMAIN}
+            paths:
+              - path: /
+                pathType: Prefix
+                service:
+                  port: 9090
+        tls:
+          - hosts:
+              - *prometheus-host
+            secretName: wildcard-main-tls

cluster/apps/monitoring/kube-prometheus-stack/helm-repository.yaml

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

cluster/apps/monitoring/kube-prometheus-stack/kustomization.yaml

@@ -0,0 +1,5 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+- ./helm-repository.yaml
+- ./helm-release.yaml

cluster/apps/monitoring/kustomization.yaml

@@ -0,0 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+- ./namespace.yaml
+- ./network_policy.yaml
+- ./kube-prometheus-stack

cluster/apps/monitoring/namespace.yaml

@@ -0,0 +1,6 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: monitoring
+  labels:
+    name: monitoring

cluster/apps/monitoring/network_policy.yaml

@@ -0,0 +1,25 @@
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: deny-most-allow-some
+  namespace: monitoring
+spec:
+  # Apply to all pods in this namespace
+  podSelector: {}
+  ingress:
+  - from:
+    # Allow all pods in this namespace
+    - namespaceSelector:
+        matchLabels:
+          name: "monitoring"
+#    - podSelector: {}
+
+    # Allow traefik pods
+    - namespaceSelector:
+        matchLabels:
+          name: "traefik"
+
+    # Allow all pods with this label
+    - podSelector:
+        matchLabels:
+          needsMonitoring: "yes"