---
# For more information refer to https://www.elastic.co/guide/en/fleet/current/running-on-kubernetes-managed-by-fleet.html
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: elastic-agent
  namespace: kube-system
  labels:
    app: elastic-agent
spec:
  selector:
    matchLabels:
      app: elastic-agent
  template:
    metadata:
      labels:
        app: elastic-agent
    spec:
      # Tolerations are needed to run Elastic Agent on Kubernetes master nodes.
      # Agents running on master nodes collect metrics from the control plane components (scheduler, controller manager) of Kubernetes
      tolerations:
        - key: node-role.kubernetes.io/master
          effect: NoSchedule
      serviceAccountName: elastic-agent
      hostNetwork: true
      # 'hostPID: true' enables the Elastic Security integration to observe all process exec events on the host.
      # Sharing the host process ID namespace gives visibility of all processes running on the same host.
      hostPID: true
      dnsPolicy: ClusterFirstWithHostNet
      containers:
        - name: k8smd
          image: docker.elastic.co/endpoint/k8smd:8.4.0
        - name: endpoint-security
          image: docker.elastic.co/endpoint/endpoint-security:8.4.0
          securityContext:
            runAsUser: 0
            privileged: true
          volumeMounts:
            - name: boot
              mountPath: /boot
            - name: debug
              mountPath: /sys/kernel/debug
            - name: bpf
              mountPath: /sys/fs/bpf
            - name: etc-passwd
              mountPath: /mnt/host/etc/passwd
              readOnly: true
            - name: etc-group
              mountPath: /mnt/host/etc/group
              readOnly: true
          env:
            - name: ELASTIC_ENDPOINT_K8S
              value: "true"
        - name: elastic-agent
          image: docker.elastic.co/beats/elastic-agent:8.4.0
          env:
            - name: ELASTIC_ENDPOINT_K8S
              value: "true"
            # Set to 1 for enrollment into Fleet server. If not set, Elastic Agent is run in standalone mode
            - name: FLEET_ENROLL
              value: "1"
            # Set to true to communicate with Fleet with either insecure HTTP or unverified HTTPS
            - name: FLEET_INSECURE
              value: "true"
            # Fleet Server URL to enroll the Elastic Agent into
            # FLEET_URL can be found in Kibana, go to Management > Fleet > Settings
            - name: FLEET_URL
              value: ""
            # Elasticsearch API key used to enroll Elastic Agents in Fleet (https://www.elastic.co/guide/en/fleet/current/fleet-enrollment-tokens.html#fleet-enrollment-tokens)
            # If FLEET_ENROLLMENT_TOKEN is empty then KIBANA_HOST, KIBANA_FLEET_USERNAME, KIBANA_FLEET_PASSWORD are needed
            - name: FLEET_ENROLLMENT_TOKEN
              value: ""
            - name: KIBANA_HOST
              value: ""
            # The basic authentication username used to connect to Kibana and retrieve a service_token to enable Fleet
            - name: KIBANA_FLEET_USERNAME
              value: "" # elastic
            # The basic authentication password used to connect to Kibana and retrieve a service_token to enable Fleet
            - name: KIBANA_FLEET_PASSWORD
              value: "" # changeme
            - name: NODE_NAME
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
            - name: POD_NAME
              valueFrom:
                fieldRef:
                  fieldPath: metadata.name
          securityContext:
            runAsUser: 0
          resources:
            limits:
              memory: 700Mi
            requests:
              cpu: 100m
              memory: 400Mi
          volumeMounts:
            - name: proc
              mountPath: /hostfs/proc
              readOnly: true
            - name: etc-kubernetes
              mountPath: /hostfs/etc/kubernetes
              readOnly: true
            - name: var-lib
              mountPath: /hostfs/var/lib
              readOnly: true
            - name: cgroup
              mountPath: /hostfs/sys/fs/cgroup
              readOnly: true
            - name: varlibdockercontainers
              mountPath: /var/lib/docker/containers
              readOnly: true
            - name: varlog
              mountPath: /var/log
              readOnly: true
            - name: passwd
              mountPath: /hostfs/etc/passwd
              readOnly: true
            - name: group
              mountPath: /hostfs/etc/group
              readOnly: true
            - name: etcsysmd
              mountPath: /hostfs/etc/systemd
              readOnly: true
            - name: etc-mid
              mountPath: /etc/machine-id
              readOnly: true
      volumes:
        - name: proc
          hostPath:
            path: /proc
        - name: cgroup
          hostPath:
            path: /sys/fs/cgroup
        - name: varlibdockercontainers
          hostPath:
            path: /var/lib/docker/containers
        - name: varlog
          hostPath:
            path: /var/log
        # Needed for cloudbeat
        - name: etc-kubernetes
          hostPath:
            path: /etc/kubernetes
        # Needed for cloudbeat
        - name: var-lib
          hostPath:
            path: /var/lib
        # Needed for cloudbeat
        - name: passwd
          hostPath:
            path: /etc/passwd
        # Needed for cloudbeat
        - name: group
          hostPath:
            path: /etc/group
        # Needed for cloudbeat
        - name: etcsysmd
          hostPath:
            path: /etc/systemd
        # Mount /etc/machine-id from the host to determine host ID
        # Needed for Elastic Security integration
        - name: etc-mid
          hostPath:
            path: /etc/machine-id
            type: File
        - name: etc-passwd
          hostPath:
            path: /etc/passwd
            type: File
        - name: etc-group
          hostPath:
            path: /etc/group
            type: File
        - name: boot
          hostPath:
            path: /boot
        - name: debug
          hostPath:
            path: /sys/kernel/debug
        - name: bpf
          hostPath:
            path: /sys/fs/bpf
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: elastic-agent
subjects:
  - kind: ServiceAccount
    name: elastic-agent
    namespace: kube-system
roleRef:
  kind: ClusterRole
  name: elastic-agent
  apiGroup: rbac.authorization.k8s.io
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  namespace: kube-system
  name: elastic-agent
subjects:
  - kind: ServiceAccount
    name: elastic-agent
    namespace: kube-system
roleRef:
  kind: Role
  name: elastic-agent
  apiGroup: rbac.authorization.k8s.io
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: elastic-agent-kubeadm-config
  namespace: kube-system
subjects:
  - kind: ServiceAccount
    name: elastic-agent
    namespace: kube-system
roleRef:
  kind: Role
  name: elastic-agent-kubeadm-config
  apiGroup: rbac.authorization.k8s.io
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: elastic-agent
  labels:
    k8s-app: elastic-agent
rules:
  - apiGroups: [""]
    resources:
      - nodes
      - namespaces
      - events
      - pods
      - services
      - configmaps
      # Needed for cloudbeat
      - serviceaccounts
      - persistentvolumes
      - persistentvolumeclaims
    verbs: ["get", "list", "watch"]
  # Enable this rule only if planing to use kubernetes_secrets provider
  #- apiGroups: [""]
  #  resources:
  #  - secrets
  #  verbs: ["get"]
  - apiGroups: ["extensions"]
    resources:
      - replicasets
    verbs: ["get", "list", "watch"]
  - apiGroups: ["apps"]
    resources:
      - statefulsets
      - deployments
      - replicasets
      - daemonsets
    verbs: ["get", "list", "watch"]
  - apiGroups:
      - ""
    resources:
      - nodes/stats
    verbs:
      - get
  - apiGroups: [ "batch" ]
    resources:
      - jobs
      - cronjobs
    verbs: [ "get", "list", "watch" ]
  # Needed for apiserver
  - nonResourceURLs:
      - "/metrics"
    verbs:
      - get
  # Needed for cloudbeat
  - apiGroups: ["rbac.authorization.k8s.io"]
    resources:
      - clusterrolebindings
      - clusterroles
      - rolebindings
      - roles
    verbs: ["get", "list", "watch"]
  # Needed for cloudbeat
  - apiGroups: ["policy"]
    resources:
      - podsecuritypolicies
    verbs: ["get", "list", "watch"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: elastic-agent
  # Should be the namespace where elastic-agent is running
  namespace: kube-system
  labels:
    k8s-app: elastic-agent
rules:
  - apiGroups:
      - coordination.k8s.io
    resources:
      - leases
    verbs: ["get", "create", "update"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: elastic-agent-kubeadm-config
  namespace: kube-system
  labels:
    k8s-app: elastic-agent
rules:
  - apiGroups: [""]
    resources:
      - configmaps
    resourceNames:
      - kubeadm-config
    verbs: ["get"]
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: elastic-agent
  namespace: kube-system
  labels:
    k8s-app: elastic-agent
---
