---
- name: Deploy Kubernetes Dashboard to k3s cluster
  hosts: master
  become: yes
  vars:
    dashboard_namespace: "kubernetes-dashboard"
    dashboard_version: "v2.7.0"
    metrics_scraper_version: "v1.0.8"

  tasks:
    - name: Create kubernetes dashboard namespace
      shell: |
        kubectl create namespace {{ dashboard_namespace }} --dry-run=client -o yaml | kubectl apply -f -
      register: namespace_result
      failed_when: false

    - name: Apply Kubernetes Dashboard manifests
      shell: |
        kubectl apply -f - << 'EOF'
apiVersion: v1
kind: ServiceAccount
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: {{ dashboard_namespace }}
---
apiVersion: v1
kind: Service
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: {{ dashboard_namespace }}
spec:
  ports:
    - port: 443
      targetPort: 8443
  selector:
    k8s-app: kubernetes-dashboard
  type: ClusterIP
---
apiVersion: v1
kind: Secret
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard-certs
  namespace: {{ dashboard_namespace }}
type: Opaque
---
apiVersion: v1
kind: Secret
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard-csrf
  namespace: {{ dashboard_namespace }}
type: Opaque
data:
  csrf: ""
---
apiVersion: v1
kind: Secret
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard-key-holder
  namespace: {{ dashboard_namespace }}
type: Opaque
---
apiVersion: v1
kind: ConfigMap
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard-settings
  namespace: {{ dashboard_namespace }}
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: {{ dashboard_namespace }}
rules:
  - apiGroups: [""]
    resources: ["secrets"]
    resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs", "kubernetes-dashboard-csrf"]
    verbs: ["get", "update", "delete"]
  - apiGroups: [""]
    resources: ["configmaps"]
    resourceNames: ["kubernetes-dashboard-settings"]
    verbs: ["get", "update"]
  - apiGroups: [""]
    resources: ["services"]
    resourceNames: ["heapster", "dashboard-metrics-scraper"]
    verbs: ["proxy"]
  - apiGroups: [""]
    resources: ["services/proxy"]
    resourceNames: ["heapster", "http:heapster:", "https:heapster:"]
    verbs: ["get"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
rules:
  - apiGroups: ["metrics.k8s.io"]
    resources: ["pods", "nodes"]
    verbs: ["get", "list", "watch"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: {{ dashboard_namespace }}
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: kubernetes-dashboard
subjects:
  - kind: ServiceAccount
    name: kubernetes-dashboard
    namespace: {{ dashboard_namespace }}
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: kubernetes-dashboard
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: kubernetes-dashboard
subjects:
  - kind: ServiceAccount
    name: kubernetes-dashboard
    namespace: {{ dashboard_namespace }}
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: {{ dashboard_namespace }}
spec:
  replicas: 1
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      k8s-app: kubernetes-dashboard
  template:
    metadata:
      labels:
        k8s-app: kubernetes-dashboard
    spec:
      securityContext:
        seccompProfile:
          type: RuntimeDefault
      containers:
        - name: kubernetes-dashboard
          image: kubernetesui/dashboard:{{ dashboard_version }}
          imagePullPolicy: Always
          ports:
            - containerPort: 8443
              protocol: TCP
          args:
            - --auto-generate-certificates
            - --namespace={{ dashboard_namespace }}
            - --enable-skip-login
            - --enable-insecure-login
          volumeMounts:
            - name: kubernetes-dashboard-certs
              mountPath: /certs
            - mountPath: /tmp
              name: tmp-volume
          livenessProbe:
            httpGet:
              scheme: HTTPS
              path: /
              port: 8443
            initialDelaySeconds: 30
            timeoutSeconds: 30
            periodSeconds: 10
            failureThreshold: 3
          securityContext:
            allowPrivilegeEscalation: false
            readOnlyRootFilesystem: false
            runAsUser: 1001
            runAsGroup: 2001
      volumes:
        - name: kubernetes-dashboard-certs
          secret:
            secretName: kubernetes-dashboard-certs
        - name: tmp-volume
          emptyDir: {}
      serviceAccountName: kubernetes-dashboard
      nodeSelector:
        "kubernetes.io/os": linux
      tolerations:
        - key: node-role.kubernetes.io/master
          effect: NoSchedule
        - key: node-role.kubernetes.io/control-plane
          effect: NoSchedule
---
apiVersion: v1
kind: Service
metadata:
  labels:
    k8s-app: dashboard-metrics-scraper
  name: dashboard-metrics-scraper
  namespace: {{ dashboard_namespace }}
spec:
  ports:
    - port: 8000
      targetPort: 8000
  selector:
    k8s-app: dashboard-metrics-scraper
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    k8s-app: dashboard-metrics-scraper
  name: dashboard-metrics-scraper
  namespace: {{ dashboard_namespace }}
spec:
  replicas: 1
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      k8s-app: dashboard-metrics-scraper
  template:
    metadata:
      labels:
        k8s-app: dashboard-metrics-scraper
    spec:
      securityContext:
        seccompProfile:
          type: RuntimeDefault
      containers:
        - name: dashboard-metrics-scraper
          image: kubernetesui/metrics-scraper:{{ metrics_scraper_version }}
          ports:
            - containerPort: 8000
              protocol: TCP
          livenessProbe:
            httpGet:
              scheme: HTTP
              path: /
              port: 8000
            initialDelaySeconds: 30
            timeoutSeconds: 30
            periodSeconds: 10
            failureThreshold: 3
          volumeMounts:
          - mountPath: /tmp
            name: tmp-volume
          securityContext:
            allowPrivilegeEscalation: false
            readOnlyRootFilesystem: false
            runAsUser: 1001
            runAsGroup: 2001
      volumes:
        - name: tmp-volume
          emptyDir: {}
      serviceAccountName: kubernetes-dashboard
      nodeSelector:
        "kubernetes.io/os": linux
      tolerations:
        - key: node-role.kubernetes.io/master
          effect: NoSchedule
        - key: node-role.kubernetes.io/control-plane
          effect: NoSchedule
EOF
      register: dashboard_result

    - name: Create admin user for dashboard
      shell: |
        kubectl apply -f - << 'EOF'
apiVersion: v1
kind: ServiceAccount
metadata:
  name: admin-user
  namespace: {{ dashboard_namespace }}
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: admin-user
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: admin-user
  namespace: {{ dashboard_namespace }}
EOF
      register: admin_user_result

    - name: Wait for dashboard pods to be ready
      shell: |
        kubectl wait --for=condition=ready pod -l k8s-app=kubernetes-dashboard -n {{ dashboard_namespace }} --timeout=120s
      register: wait_result
      failed_when: false

    - name: Get dashboard service info
      shell: |
        kubectl get svc kubernetes-dashboard -n {{ dashboard_namespace }}
      register: svc_info

    - name: Display dashboard service info
      debug:
        msg: "{{ svc_info.stdout_lines }}"

    - name: Display deployment status
      debug:
        msg: "Kubernetes Dashboard deployed successfully in namespace {{ dashboard_namespace }}"