{{/*
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.statefulset_prometheus }}
{{- $envAll := . }}

{{- $mounts_prometheus := .Values.pod.mounts.prometheus.prometheus }}
{{- $mounts_prometheus_init := .Values.pod.mounts.prometheus.init_container }}
{{- $promUserSecret := .Values.secrets.prometheus.admin }}

{{- $serviceAccountName := printf "%s-%s" .Release.Name "prometheus" }}
{{ tuple $envAll "prometheus" $serviceAccountName | include "helm-toolkit.snippets.kubernetes_pod_rbac_serviceaccount" }}
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRole
metadata:
  name: {{ $serviceAccountName }}
rules:
  - apiGroups:
      - ""
    resources:
      - nodes
      - nodes/proxy
      - services
      - endpoints
      - pods
    verbs:
      - get
      - list
      - watch
  - apiGroups:
      - ""
    resources:
      - configmaps
    verbs:
      - get
  - nonResourceURLs:
      - "/metrics"
    verbs:
      - get
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: {{ $serviceAccountName }}
subjects:
  - kind: ServiceAccount
    name: {{ $serviceAccountName }}
    namespace: {{ .Release.Namespace }}
roleRef:
  kind: ClusterRole
  name: {{ $serviceAccountName }}
  apiGroup: rbac.authorization.k8s.io
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: prometheus
  annotations:
    {{ tuple $envAll | include "helm-toolkit.snippets.release_uuid" }}
  labels:
{{ tuple $envAll "prometheus" "api" | include "helm-toolkit.snippets.kubernetes_metadata_labels" | indent 4 }}
spec:
  serviceName: {{ tuple "monitoring" "internal" . | include "helm-toolkit.endpoints.hostname_short_endpoint_lookup" }}
  replicas: {{ .Values.pod.replicas.prometheus }}
  selector:
    matchLabels:
{{ tuple $envAll "prometheus" "api" | include "helm-toolkit.snippets.kubernetes_metadata_labels" | indent 6 }}
  template:
    metadata:
      labels:
{{ tuple $envAll "prometheus" "api" | include "helm-toolkit.snippets.kubernetes_metadata_labels" | indent 8 }}
      annotations:
        configmap-bin-hash: {{ tuple "configmap-bin.yaml" . | include "helm-toolkit.utils.hash" }}
        configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "helm-toolkit.utils.hash" }}
    spec:
      serviceAccountName: {{ $serviceAccountName }}
      affinity:
{{ tuple $envAll "prometheus" "api" | include "helm-toolkit.snippets.kubernetes_pod_anti_affinity" | indent 8 }}
      nodeSelector:
        {{ .Values.labels.prometheus.node_selector_key }}: {{ .Values.labels.prometheus.node_selector_value | quote }}
      terminationGracePeriodSeconds: {{ .Values.pod.lifecycle.termination_grace_period.prometheus.timeout | default "30" }}
      initContainers:
{{ tuple $envAll "prometheus" list | include "helm-toolkit.snippets.kubernetes_entrypoint_init_container" | indent 8 }}
        - name: prometheus-perms
{{ tuple $envAll "prometheus" | include "helm-toolkit.snippets.image" | indent 10 }}
{{ tuple $envAll $envAll.Values.pod.resources.prometheus | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
          securityContext:
            runAsUser: 0
          command:
            - chown
            - -R
            - "nobody:"
            - /var/lib/prometheus/data
          volumeMounts:
            - name: storage
              mountPath: /var/lib/prometheus/data
      containers:
        - name: apache-proxy
{{ tuple $envAll "apache_proxy" | include "helm-toolkit.snippets.image" | indent 10 }}
{{ tuple $envAll $envAll.Values.pod.resources.apache_proxy | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
          command:
            - /tmp/apache.sh
            - start
          ports:
            - name: http
              containerPort: 80
          env:
            - name: PROMETHEUS_PORT
              value: {{ tuple "monitoring" "internal" "api" . | include "helm-toolkit.endpoints.endpoint_port_lookup" | quote }}
            - name: PROMETHEUS_ADMIN_USERNAME
              valueFrom:
                secretKeyRef:
                  name: {{ $promUserSecret }}
                  key: PROMETHEUS_ADMIN_USERNAME
            - name: PROMETHEUS_ADMIN_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: {{ $promUserSecret }}
                  key: PROMETHEUS_ADMIN_PASSWORD
          volumeMounts:
            - name: prometheus-bin
              mountPath: /tmp/apache.sh
              subPath: apache.sh
              readOnly: true
            - name: prometheus-etc
              mountPath: /usr/local/apache2/conf/httpd.conf
              subPath: httpd.conf
              readOnly: true
        - name: prometheus
{{ tuple $envAll "prometheus" | include "helm-toolkit.snippets.image" | indent 10 }}
{{ tuple $envAll $envAll.Values.pod.resources.prometheus | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
          command:
            - /tmp/prometheus.sh
            - start
          lifecycle:
            preStop:
              exec:
                command:
                  - /tmp/prometheus.sh
                  - stop
          ports:
            - name: prom-metrics
              containerPort: {{ tuple "monitoring" "internal" "api" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
          readinessProbe:
            httpGet:
              path: /status
              port: {{ tuple "monitoring" "internal" "api" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
            initialDelaySeconds: 30
            timeoutSeconds: 30
          volumeMounts:
            - name: etcprometheus
              mountPath: /etc/config
            - name: rulesprometheus
              mountPath: /etc/config/rules
            {{- range $key, $value := .Values.conf.prometheus.rules }}
            - name: prometheus-etc
              mountPath: /etc/config/rules/{{ $key }}.rules
              subPath: {{ $key }}.rules
              readOnly: true
            {{- end }}
            - name: prometheus-etc
              mountPath: /etc/config/prometheus.yml
              subPath: prometheus.yml
              readOnly: true
            - name: prometheus-bin
              mountPath: /tmp/prometheus.sh
              subPath: prometheus.sh
              readOnly: true
            - name: storage
              mountPath: /var/lib/prometheus/data
{{ if $mounts_prometheus.volumeMounts }}{{ toYaml $mounts_prometheus.volumeMounts | indent 12 }}{{ end }}
      volumes:
        - name: pod-etc-apache
          emptyDir: {}
        - name: etcprometheus
          emptyDir: {}
        - name: rulesprometheus
          emptyDir: {}
        - name: prometheus-etc
          secret:
            secretName: prometheus-etc
            defaultMode: 0444
        - name: prometheus-bin
          configMap:
            name: prometheus-bin
            defaultMode: 0555
{{ if $mounts_prometheus.volumes }}{{ toYaml $mounts_prometheus.volumes | indent 8 }}{{ end }}
{{- if not .Values.storage.enabled }}
        - name: storage
          emptyDir: {}
{{- else }}
  volumeClaimTemplates:
    - metadata:
        name: storage
      spec:
        accessModes: {{ .Values.storage.pvc.access_mode }}
        resources:
          requests:
            storage: {{ .Values.storage.requests.storage  }}
        storageClassName: {{ .Values.storage.storage_class }}
{{- end }}
{{- end }}