apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: {{ template "prometheus-node-exporter.fullname" . }}
  labels: {{ include "prometheus-node-exporter.labels" . | indent 4 }}
spec:
  selector:
    matchLabels:
      app: {{ template "prometheus-node-exporter.name" . }}
      release: {{ .Release.Name }}
  updateStrategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
  template:
    metadata:
      labels: {{ include "prometheus-node-exporter.labels" . | indent 8 }}
    spec:
{{- if and .Values.rbac.create .Values.serviceAccount.create }}
      serviceAccountName: {{ template "prometheus-node-exporter.serviceAccountName" . }}
{{- end }}
{{- if .Values.securityContext }}
      securityContext:
{{ toYaml .Values.securityContext | indent 8 }}
{{- end }}
{{- if .Values.priorityClassName }}
      priorityClassName: {{ .Values.priorityClassName }}
{{- end }}
      containers:
        - name: node-exporter
          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
          imagePullPolicy: {{ .Values.image.pullPolicy }}
          args:
            - --path.procfs=/host/proc
            - --path.sysfs=/host/sys
            - --web.listen-address=0.0.0.0:{{ .Values.service.port }}
{{- if .Values.extraArgs }}
{{ toYaml .Values.extraArgs | indent 12 }}
{{- end }}
          ports:
            - name: metrics
              containerPort: {{ .Values.service.targetPort }}
              protocol: TCP
          livenessProbe:
            httpGet:
              path: /
              port: {{ .Values.service.port }}
          readinessProbe:
            httpGet:
              path: /
              port: {{ .Values.service.port }}
          resources:
{{ toYaml .Values.resources | indent 12 }}
          volumeMounts:
            - name: proc
              mountPath: /host/proc
              readOnly:  true
            - name: sys
              mountPath: /host/sys
              readOnly: true
            {{- if .Values.extraHostVolumeMounts }}
            {{- range $_, $mount := .Values.extraHostVolumeMounts }}
            - name: {{ $mount.name }}
              mountPath: {{ $mount.mountPath }}
              readOnly: {{ $mount.readOnly }}
            {{- if $mount.mountPropagation }}
              mountPropagation: {{ $mount.mountPropagation }}
            {{- end }}
            {{- end }}
            {{- end }}
      hostNetwork: true
      hostPID: true
{{- if .Values.affinity }}
      affinity:
{{ toYaml .Values.affinity | indent 8 }}
{{- end }}
{{- if .Values.nodeSelector }}
      nodeSelector:
{{ toYaml .Values.nodeSelector | indent 8 }}
{{- end }}
    {{- with .Values.tolerations }}
      tolerations:
{{ toYaml . | indent 8 }}
    {{- end }}
      volumes:
        - name: proc
          hostPath:
            path: /proc
        - name: sys
          hostPath:
            path: /sys
        {{- if .Values.extraHostVolumeMounts }}
        {{- range $_, $mount := .Values.extraHostVolumeMounts }}
        - name: {{ $mount.name }}
          hostPath:
            path: {{ $mount.hostPath }}
        {{- end }}
        {{- end }}