homelab-manifests/control-system/reloader.yaml

# Reloader - Automatically restarts pods when ConfigMaps/Secrets change
# https://github.com/stakater/Reloader
# Namespace: control-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: reloader
  namespace: control-system
  labels:
    app.kubernetes.io/name: reloader
    app.kubernetes.io/instance: reloader
---
# Role for Reloader's own namespace (for leader election configmap)
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: reloader-leader-election
  namespace: control-system
  labels:
    app.kubernetes.io/name: reloader
    app.kubernetes.io/instance: reloader
rules:
- apiGroups:
  - ""
  resources:
  - configmaps
  verbs:
  - list
  - get
  - watch
  - create
  - update
- apiGroups:
  - coordination.k8s.io
  resources:
  - leases
  verbs:
  - list
  - get
  - watch
  - create
  - update
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: reloader-leader-election
  namespace: control-system
  labels:
    app.kubernetes.io/name: reloader
    app.kubernetes.io/instance: reloader
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: reloader-leader-election
subjects:
- kind: ServiceAccount
  name: reloader
  namespace: control-system
---
# ClusterRole for watching ConfigMaps/Secrets and updating workloads across all namespaces
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: reloader
  labels:
    app.kubernetes.io/name: reloader
    app.kubernetes.io/instance: reloader
rules:
- apiGroups:
  - ""
  resources:
  - secrets
  - configmaps
  verbs:
  - list
  - get
  - watch
- apiGroups:
  - apps
  resources:
  - deployments
  - daemonsets
  - statefulsets
  verbs:
  - list
  - get
  - update
  - patch
- apiGroups:
  - extensions
  resources:
  - deployments
  - daemonsets
  verbs:
  - list
  - get
  - update
  - patch
- apiGroups:
  - batch
  resources:
  - cronjobs
  verbs:
  - list
  - get
- apiGroups:
  - batch
  resources:
  - jobs
  verbs:
  - create
  - delete
  - list
  - get
- apiGroups:
  - ""
  resources:
  - events
  verbs:
  - create
  - patch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: reloader
  labels:
    app.kubernetes.io/name: reloader
    app.kubernetes.io/instance: reloader
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: reloader
subjects:
- kind: ServiceAccount
  name: reloader
  namespace: control-system
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: reloader
  namespace: control-system
  labels:
    app.kubernetes.io/name: reloader
    app.kubernetes.io/instance: reloader
    app.kubernetes.io/version: "v1.4.12"
spec:
  replicas: 1
  revisionHistoryLimit: 3
  selector:
    matchLabels:
      app.kubernetes.io/name: reloader
      app.kubernetes.io/instance: reloader
  template:
    metadata:
      labels:
        app.kubernetes.io/name: reloader
        app.kubernetes.io/instance: reloader
        app.kubernetes.io/version: "v1.4.12"
    spec:
      serviceAccountName: reloader
      securityContext:
        runAsNonRoot: true
        runAsUser: 65534
        seccompProfile:
          type: RuntimeDefault
      containers:
      - name: reloader
        image: ghcr.io/stakater/reloader:v1.4.17
        imagePullPolicy: IfNotPresent
        env:
        - name: GOMAXPROCS
          valueFrom:
            resourceFieldRef:
              divisor: "1"
              resource: limits.cpu
        - name: GOMEMLIMIT
          valueFrom:
            resourceFieldRef:
              divisor: "1"
              resource: limits.memory
        - name: RELOADER_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        - name: RELOADER_DEPLOYMENT_NAME
          value: reloader
        ports:
        - name: http
          containerPort: 9090
          protocol: TCP
        resources:
          requests:
            cpu: 10m
            memory: 128Mi
          limits:
            cpu: 500m
            memory: 256Mi
        livenessProbe:
          httpGet:
            path: /live
            port: http
          initialDelaySeconds: 10
          periodSeconds: 10
          timeoutSeconds: 5
          failureThreshold: 5
        readinessProbe:
          httpGet:
            path: /metrics
            port: http
          initialDelaySeconds: 10
          periodSeconds: 10
          timeoutSeconds: 5
          failureThreshold: 5
        securityContext:
          allowPrivilegeEscalation: false
          readOnlyRootFilesystem: true
          capabilities:
            drop:
            - ALL