# Copyright 2023 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

apiVersion: apps/v1
kind: StatefulSet
metadata:
  labels:
    app.kubernetes.io/name: kube-state-metrics
    app.kubernetes.io/version: 2.3.0
  namespace: gmp-public
  name: kube-state-metrics
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: kube-state-metrics
  serviceName: kube-state-metrics
  template:
    metadata:
      labels:
        app.kubernetes.io/name: kube-state-metrics
        app.kubernetes.io/version: 2.3.0
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
            - matchExpressions:
              - key: kubernetes.io/arch
                operator: In
                values:
                - arm64
                - amd64
              - key: kubernetes.io/os
                operator: In
                values:
                - linux
      containers:
      - name: kube-state-metric
        image: k8s.gcr.io/kube-state-metrics/kube-state-metrics:v2.3.0
        env:
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        args:
        - --pod=$(POD_NAME)
        - --pod-namespace=$(POD_NAMESPACE)
        - --port=8080
        - --telemetry-port=8081
        ports:
        - name: metrics
          containerPort: 8080
        - name: metrics-self
          containerPort: 8081
        resources:
          requests:
            cpu: 250m
            memory: 500Mi
          limits:
            memory: 500Mi
        securityContext:
          allowPrivilegeEscalation: false
          privileged: false
          capabilities:
            drop:
            - all
          runAsUser: 1000
          runAsGroup: 1000
        livenessProbe:
          httpGet:
            path: /healthz
            port: 8080
          initialDelaySeconds: 5
          timeoutSeconds: 5
        readinessProbe:
          httpGet:
            path: /
            port: 8081
          initialDelaySeconds: 5
          timeoutSeconds: 5
      serviceAccountName: kube-state-metrics
---
apiVersion: v1
kind: Service
metadata:
  labels:
    app.kubernetes.io/name: kube-state-metrics
    app.kubernetes.io/version: 2.3.0
  namespace: gmp-public
  name: kube-state-metrics
spec:
  clusterIP: None
  ports:
  - name: metrics
    port: 8080
    targetPort: metrics
  - name: metrics-self
    port: 8081
    targetPort: metrics-self
  selector:
    app.kubernetes.io/name: kube-state-metrics
---
apiVersion: v1
kind: ServiceAccount
metadata:
  namespace: gmp-public
  name: kube-state-metrics
  labels:
    app.kubernetes.io/name: kube-state-metrics
    app.kubernetes.io/version: 2.3.0
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: gmp-public:kube-state-metrics
  labels:
    app.kubernetes.io/name: kube-state-metrics
    app.kubernetes.io/version: 2.3.0
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: gmp-public:kube-state-metrics
subjects:
- kind: ServiceAccount
  namespace: gmp-public
  name: kube-state-metrics
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: gmp-public:kube-state-metrics
  labels:
    app.kubernetes.io/name: kube-state-metrics
    app.kubernetes.io/version: 2.3.0
rules:
- apiGroups:
  - ""
  resources:
  - configmaps
  - secrets
  - nodes
  - pods
  - services
  - resourcequotas
  - replicationcontrollers
  - limitranges
  - persistentvolumeclaims
  - persistentvolumes
  - namespaces
  - endpoints
  verbs:
  - list
  - watch
- apiGroups:
  - ""
  resources:
  - pods
  verbs:
  - get
- apiGroups:
  - extensions
  resources:
  - daemonsets
  - deployments
  - replicasets
  - ingresses
  verbs:
  - list
  - watch
- apiGroups:
  - apps
  resources:
  - statefulsets
  - daemonsets
  - deployments
  - replicasets
  verbs:
  - list
  - watch
- apiGroups:
  - apps
  resources:
  - statefulsets
  verbs:
  - get 
- apiGroups:
  - batch
  resources:
  - cronjobs
  - jobs
  verbs:
  - list
  - watch
- apiGroups:
  - autoscaling
  resources:
  - horizontalpodautoscalers
  verbs:
  - list
  - watch
- apiGroups:
  - authentication.k8s.io
  resources:
  - tokenreviews
  verbs:
  - create
- apiGroups:
  - authorization.k8s.io
  resources:
  - subjectaccessreviews
  verbs:
  - create
- apiGroups:
  - policy
  resources:
  - poddisruptionbudgets
  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
- apiGroups:
  - networking.k8s.io
  resources:
  - networkpolicies
  - ingresses
  verbs:
  - list
  - watch
- apiGroups:
  - coordination.k8s.io
  resources:
  - leases
  verbs:
  - list
  - watch
---
# TODO(pintohutch): bump to autoscaling/v2 when 1.23 is the default in the GKE
# stable release channel.
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: kube-state-metrics
  namespace: gmp-public
spec:
  maxReplicas: 10
  minReplicas: 1
  scaleTargetRef:
    apiVersion: apps/v1
    kind: StatefulSet
    name: kube-state-metrics
  metrics:
  - type: Resource
    resource:
      name: memory
      target:
        type: Utilization
        averageUtilization: 60
  behavior:
    scaleDown:
      policies:
      - type: Pods
        value: 1
        # Under-utilization needs to persist for `periodSeconds` before any action can be taken.
        # Current supported max from https://kubernetes.io/docs/reference/kubernetes-api/workload-resources/horizontal-pod-autoscaler-v2beta2/.
        periodSeconds: 1800
      # Current supported max from https://kubernetes.io/docs/reference/kubernetes-api/workload-resources/horizontal-pod-autoscaler-v2beta2/.
      stabilizationWindowSeconds: 3600
---
apiVersion: monitoring.googleapis.com/v1
kind: ClusterPodMonitoring
metadata:
  name: kube-state-metrics
  labels:
    app.kubernetes.io/name: kube-state-metrics
    app.kubernetes.io/part-of: google-cloud-managed-prometheus
spec:
  selector:
    matchLabels:
      app.kubernetes.io/name: kube-state-metrics
  endpoints:
  - port: metrics
    interval: 30s
    metricRelabeling:
    - action: keep
      regex: kube_(daemonset|deployment|pod|namespace|node|statefulset)_.+
      sourceLabels: [__name__]
  targetLabels:
    metadata: [] # explicitly empty so the metric labels are respected
---
apiVersion: monitoring.googleapis.com/v1
kind: PodMonitoring
metadata:
  namespace: gmp-public
  name: kube-state-metrics
  labels:
    app.kubernetes.io/name: kube-state-metrics
    app.kubernetes.io/part-of: google-cloud-managed-prometheus
spec:
  selector:
    matchLabels:
      app.kubernetes.io/name: kube-state-metrics
  endpoints:
  - port: metrics-self
    interval: 30s