{{/*
Copyright 2017 The Openstack-Helm Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/}}

{{- if .Values.manifests.daemonset }}
{{- $envAll := . }}

{{- $serviceAccountName := printf "%s-%s" .Release.Name "node-exporter" }}
{{ tuple $envAll "node_exporter" $serviceAccountName | include "helm-toolkit.snippets.kubernetes_pod_rbac_serviceaccount" }}
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: run-node-exporter
subjects:
  - kind: ServiceAccount
    name: {{ $serviceAccountName }}
    namespace: {{ .Release.Namespace }}
roleRef:
  kind: ClusterRole
  name: cluster-admin
  apiGroup: rbac.authorization.k8s.io
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: node-exporter
  annotations:
    {{ tuple $envAll | include "helm-toolkit.snippets.release_uuid" }}
  namespace: {{ .Values.endpoints.node_metrics.namespace }}
  labels:
{{ tuple $envAll "node_exporter" "metrics" | include "helm-toolkit.snippets.kubernetes_metadata_labels" | indent 4 }}
spec:
  selector:
    matchLabels:
{{ tuple $envAll "node_exporter" "metrics" | include "helm-toolkit.snippets.kubernetes_metadata_labels" | indent 6 }}
{{ tuple $envAll "node_exporter" | include "helm-toolkit.snippets.kubernetes_upgrades_daemonset" | indent 2 }}
  template:
    metadata:
      labels:
{{ tuple $envAll "node_exporter" "metrics" | include "helm-toolkit.snippets.kubernetes_metadata_labels" | indent 8 }}
      namespace: {{ .Values.endpoints.node_metrics.namespace }}
    spec:
      securityContext:
        readOnlyRootFilesystem: true
      serviceAccountName: {{ $serviceAccountName }}
{{ if .Values.pod.tolerations.node_exporter.enabled }}
{{ tuple $envAll "node_exporter" | include "helm-toolkit.snippets.kubernetes_tolerations" | indent 6 }}
{{ else }}
      nodeSelector:
        {{ .Values.labels.node_exporter.node_selector_key }}: {{ .Values.labels.node_exporter.node_selector_value | quote }}
{{ end }}
      hostNetwork: true
      hostPID: true
      initContainers:
{{ tuple $envAll "node_exporter" list | include "helm-toolkit.snippets.kubernetes_entrypoint_init_container" | indent 8 }}
      containers:
        - name: node-exporter
{{ tuple $envAll "node_exporter" | include "helm-toolkit.snippets.image" | indent 10 }}
{{ tuple $envAll $envAll.Values.pod.resources.node_exporter | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
          command:
            - /tmp/node-exporter.sh
          ports:
            - name: metrics
              containerPort: {{ tuple "node_metrics" "internal" "metrics" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
              hostPort: {{ tuple "node_metrics" "internal" "metrics" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
          readinessProbe:
            httpGet:
              port: {{ tuple "node_metrics" "internal" "metrics" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
            initialDelaySeconds: 20
            periodSeconds: 10
          volumeMounts:
            - name: proc
              mountPath: /host/proc
              readOnly:  true
            - name: sys
              mountPath: /host/sys
              readOnly:  true
{{ if .Values.conf.collectors.textfile.directory }}
            - name: stats-out
              mountPath: {{.Values.conf.collectors.textfile.directory }}
              readOnly:  true
{{ end }}
            - name: node-exporter-bin
              mountPath: /tmp/node-exporter.sh
              subPath: node-exporter.sh
              readOnly: true
      volumes:
        - name: proc
          hostPath:
            path: /proc
        - name: sys
          hostPath:
            path: /sys
{{ if .Values.conf.collectors.textfile.directory }}
        - name: stats-out
          hostPath:
            path: {{.Values.conf.collectors.textfile.directory }}
{{ end }}
        - name: node-exporter-bin
          configMap:
            name: node-exporter-bin
            defaultMode: 0555
{{- end }}