Add kube-state-metrics for k8s resource monitoring

argocd/apps/kube-state-metrics.yaml

@@ -0,0 +1,17 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: kube-state-metrics
+  namespace: argocd
+spec:
+  project: default
+  source:
+    repoURL: ssh://forgejo@indri.tail8d86e.ts.net:2200/eblume/blumeops.git
+    targetRevision: main
+    path: argocd/manifests/kube-state-metrics
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: monitoring
+  syncPolicy:
+    syncOptions:
+      - CreateNamespace=true

argocd/manifests/kube-state-metrics/deployment.yaml

@@ -0,0 +1,53 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: kube-state-metrics
+  namespace: monitoring
+  labels:
+    app: kube-state-metrics
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: kube-state-metrics
+  template:
+    metadata:
+      labels:
+        app: kube-state-metrics
+    spec:
+      serviceAccountName: kube-state-metrics
+      containers:
+        - name: kube-state-metrics
+          image: registry.k8s.io/kube-state-metrics/kube-state-metrics:v2.13.0
+          ports:
+            - containerPort: 8080
+              name: http-metrics
+            - containerPort: 8081
+              name: telemetry
+          livenessProbe:
+            httpGet:
+              path: /healthz
+              port: 8080
+            initialDelaySeconds: 5
+            timeoutSeconds: 5
+          readinessProbe:
+            httpGet:
+              path: /
+              port: 8080
+            initialDelaySeconds: 5
+            timeoutSeconds: 5
+          resources:
+            requests:
+              cpu: 10m
+              memory: 64Mi
+            limits:
+              cpu: 100m
+              memory: 256Mi
+          securityContext:
+            allowPrivilegeEscalation: false
+            readOnlyRootFilesystem: true
+            runAsNonRoot: true
+            runAsUser: 65534
+            capabilities:
+              drop:
+                - ALL

argocd/manifests/kube-state-metrics/kustomization.yaml

@@ -0,0 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - rbac.yaml
+  - deployment.yaml
+  - service.yaml

argocd/manifests/kube-state-metrics/rbac.yaml

@@ -0,0 +1,79 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: kube-state-metrics
+  namespace: monitoring
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: kube-state-metrics
+rules:
+  - apiGroups: [""]
+    resources:
+      - configmaps
+      - secrets
+      - nodes
+      - pods
+      - services
+      - serviceaccounts
+      - resourcequotas
+      - replicationcontrollers
+      - limitranges
+      - persistentvolumeclaims
+      - persistentvolumes
+      - namespaces
+      - endpoints
+    verbs: ["list", "watch"]
+  - apiGroups: ["apps"]
+    resources:
+      - statefulsets
+      - daemonsets
+      - deployments
+      - replicasets
+    verbs: ["list", "watch"]
+  - apiGroups: ["batch"]
+    resources:
+      - cronjobs
+      - jobs
+    verbs: ["list", "watch"]
+  - apiGroups: ["autoscaling"]
+    resources:
+      - horizontalpodautoscalers
+    verbs: ["list", "watch"]
+  - apiGroups: ["networking.k8s.io"]
+    resources:
+      - networkpolicies
+      - ingresses
+    verbs: ["list", "watch"]
+  - apiGroups: ["coordination.k8s.io"]
+    resources:
+      - leases
+    verbs: ["list", "watch"]
+  - apiGroups: ["certificates.k8s.io"]
+    resources:
+      - certificatesigningrequests
+    verbs: ["list", "watch"]
+  - apiGroups: ["storage.k8s.io"]
+    resources:
+      - storageclasses
+      - volumeattachments
+    verbs: ["list", "watch"]
+  - apiGroups: ["admissionregistration.k8s.io"]
+    resources:
+      - mutatingwebhookconfigurations
+      - validatingwebhookconfigurations
+    verbs: ["list", "watch"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: kube-state-metrics
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: kube-state-metrics
+subjects:
+  - kind: ServiceAccount
+    name: kube-state-metrics
+    namespace: monitoring

argocd/manifests/kube-state-metrics/service.yaml

@@ -0,0 +1,17 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: kube-state-metrics
+  namespace: monitoring
+  labels:
+    app: kube-state-metrics
+spec:
+  selector:
+    app: kube-state-metrics
+  ports:
+    - name: http-metrics
+      port: 8080
+      targetPort: http-metrics
+    - name: telemetry
+      port: 8081
+      targetPort: telemetry

argocd/manifests/prometheus/configmap.yaml

@@ -41,3 +41,8 @@ data:
       - job_name: "transmission"
         static_configs:
           - targets: ["transmission.torrent.svc.cluster.local:19091"]
+
+      # Kubernetes state metrics (pods, deployments, resource usage, etc.)
+      - job_name: "kube-state-metrics"
+        static_configs:
+          - targets: ["kube-state-metrics.monitoring.svc.cluster.local:8080"]