# Deployment for the node-pool-controller
apiVersion: apps/v1
kind: Deployment
metadata:
  name: node-pool-controller
  namespace: kube-system
spec:
  replicas: 1
  selector:
    matchLabels:
      app: node-pool-controller
  template:
    metadata:
      labels:
        app: node-pool-controller
    spec:
      nodeSelector:
        node.kubernetes.io/microk8s-controlplane: microk8s-controlplane
      serviceAccountName: node-pool-controller
      containers:
      - name: node-pool-controller
        image: allardkrings/node-pool-controller:2.1
        imagePullPolicy: Always
        env:
        - name: NODE_POOL_FILE_NAME
          value: /mnt/nfs/node-pool.yaml
        - name: NODE_SSH_USER
          valueFrom:
            secretKeyRef:
              name: node-ssh-secret
              key: username
        - name: NODE_SSH_PASS
          valueFrom:
            secretKeyRef:
              name: node-ssh-secret
              key: password
        - name: MIN_CPU
          value: "40"
        - name: MAX_CPU
          value: "80"
        - name: MIN_MEM
          value: "60"
        - name: MAX_MEM
          value: "80"
        - name: DEACTIVATE_WAIT_SEC
          value: "180"
        - name: DESIRED_CONTROL_PLANES
          value: "3"
        - name: CLUSTER_NAME
          value: PROD
        volumeMounts:
        - name: nodes-nfs
          mountPath: /mnt/nfs
      volumes:
      - name: nodes-nfs
        persistentVolumeClaim:
          claimName: node-pool-controller-pvc
---
# Secret containing the SSH credentials for all nodes
apiVersion: v1
kind: Secret
metadata:
  name: node-ssh-secret
  namespace: kube-system
type: Opaque
stringData:
  username: ubuntu
  password: Heleen0515
---
# Serviceaccount to add and remove nodes
apiVersion: v1
kind: ServiceAccount
metadata:
  name: node-pool-controller
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: node-pool-controller
rules:
  - apiGroups: [""]
    resources: ["nodes", "pods"]
    verbs: ["get", "list", "watch", "update", "patch", "delete"]
  - apiGroups: ["metrics.k8s.io"]
    resources: ["nodes"]
    verbs: ["get", "list", "watch"]
---
# Binding or role to account
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: node-pool-controller
subjects:
  - kind: ServiceAccount
    name: node-pool-controller
    namespace: kube-system
roleRef:
  kind: ClusterRole
  name: node-pool-controller
  apiGroup: rbac.authorization.k8s.io
---
apiVersion: v1
kind: Service
metadata:
  name: node-pool-controller
  namespace: kube-system
  labels:
    app: node-pool-controller
spec:
  ports:
  - port: 8080
    protocol: TCP
  selector:
    app: node-pool-controller
  type: ClusterIP
---
apiVersion: traefik.io/v1alpha1
kind: IngressRoute
metadata:
  name: node-pool-controller-tls
  namespace: kube-system
spec:
  entryPoints:
    - websecure
  routes:
  - match: Host(`nodepool-prod.allarddcs.nl`) && PathPrefix(`/`)
    kind: Rule
    services:
    - name: node-pool-controller
      port: 8080
  tls:
    certResolver: letsencrypt
---
# PersistentVolume for the NFS node list
apiVersion: v1
kind: PersistentVolume
metadata:
  name: node-pool-controller-pv
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  storageClassName: ""
  mountOptions:
    - hard
    - nfsvers=4.1
  nfs:
    server: 192.168.2.111
    path: /mnt/nfs_share/prod/node-pool
    readOnly: false
---
# PersistentVolumeClaim to mount into the controller
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: node-pool-controller-pvc
  namespace: kube-system
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 1Gi
  storageClassName: ""
  volumeName: node-pool-controller-pv