{{/*
 Licensed to the Apache Software Foundation (ASF) under one
 or more contributor license agreements.  See the NOTICE file
 distributed with this work for additional information
 regarding copyright ownership.  The ASF licenses this file
 to you 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.
*/}}

################################
## Airflow Pgbouncer Deployment
#################################
{{- if .Values.pgbouncer.enabled }}
{{- $nodeSelector := or .Values.pgbouncer.nodeSelector .Values.nodeSelector }}
{{- $affinity := or .Values.pgbouncer.affinity .Values.affinity }}
{{- $tolerations := or .Values.pgbouncer.tolerations .Values.tolerations }}
{{- $topologySpreadConstraints := or .Values.pgbouncer.topologySpreadConstraints .Values.topologySpreadConstraints }}
{{- $revisionHistoryLimit := or .Values.pgbouncer.revisionHistoryLimit .Values.revisionHistoryLimit }}
{{- $securityContext := include "localPodSecurityContext" .Values.pgbouncer }}
{{- $containerSecurityContext := include "externalContainerSecurityContext" .Values.pgbouncer }}
{{- $containerSecurityContextMetricsExporter := include "externalContainerSecurityContext" .Values.pgbouncer.metricsExporterSidecar }}
{{- $containerLifecycleHooks := .Values.pgbouncer.containerLifecycleHooks }}
{{- $containerLifecycleHooksMetricsExporter := .Values.pgbouncer.metricsExporterSidecar.containerLifecycleHooks }}
apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ include "airflow.fullname" . }}-pgbouncer
  labels:
    tier: airflow
    component: pgbouncer
    release: {{ .Release.Name }}
    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
    heritage: {{ .Release.Service }}
    {{- with .Values.labels }}
      {{- toYaml . | nindent 4 }}
    {{- end }}
  {{- if .Values.pgbouncer.annotations }}
  annotations: {{- toYaml .Values.pgbouncer.annotations | nindent 4 }}
  {{- end }}
spec:
  replicas: {{ .Values.pgbouncer.replicas | default "1" }}
  {{- if $revisionHistoryLimit }}
  revisionHistoryLimit: {{ $revisionHistoryLimit }}
  {{- end }}
  strategy:
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  selector:
    matchLabels:
      tier: airflow
      component: pgbouncer
      release: {{ .Release.Name }}
  template:
    metadata:
      labels:
        tier: airflow
        component: pgbouncer
        release: {{ .Release.Name }}
        {{- with .Values.labels }}
          {{- toYaml . | nindent 8 }}
        {{- end }}
      annotations:
        checksum/pgbouncer-config-secret: {{ include (print $.Template.BasePath "/secrets/pgbouncer-config-secret.yaml") . | sha256sum }}
        checksum/pgbouncer-certificates-secret: {{ include (print $.Template.BasePath "/secrets/pgbouncer-certificates-secret.yaml") . | sha256sum }}
        {{- if .Values.pgbouncer.podAnnotations }}
          {{- toYaml .Values.pgbouncer.podAnnotations | nindent 8 }}
        {{- end }}
    spec:
      {{- if .Values.pgbouncer.priorityClassName }}
      priorityClassName: {{ .Values.pgbouncer.priorityClassName }}
      {{- end }}
      nodeSelector: {{- toYaml $nodeSelector | nindent 8 }}
      affinity: {{- toYaml $affinity | nindent 8 }}
      {{- if .Values.schedulerName }}
      schedulerName: {{ .Values.schedulerName }}
      {{- end }}
      tolerations: {{- toYaml $tolerations | nindent 8 }}
      topologySpreadConstraints: {{- toYaml $topologySpreadConstraints | nindent 8 }}
      serviceAccountName: {{ include "pgbouncer.serviceAccountName" . }}
      securityContext: {{ $securityContext | nindent 8 }}
      restartPolicy: Always
      {{- if or .Values.registry.secretName .Values.registry.connection }}
      imagePullSecrets:
        - name: {{ template "registry_secret" . }}
      {{- end }}
      containers:
        - name: pgbouncer
          image: {{ template "pgbouncer_image" . }}
          imagePullPolicy: {{ .Values.images.pgbouncer.pullPolicy }}
          securityContext: {{ $containerSecurityContext | nindent 12 }}
          {{- if .Values.pgbouncer.command }}
          command: {{ tpl (toYaml .Values.pgbouncer.command) . | nindent 12 }}
          {{- end }}
          {{- if .Values.pgbouncer.args }}
          args: {{ tpl (toYaml .Values.pgbouncer.args) . | nindent 12 }}
          {{- end }}
          resources: {{- toYaml .Values.pgbouncer.resources | nindent 12 }}
          {{- with .Values.pgbouncer.env }}
          env: {{- toYaml . | nindent 12 }}
          {{- end }}
          ports:
            - name: pgbouncer
              containerPort: {{ .Values.ports.pgbouncer }}
          livenessProbe:
            tcpSocket:
              port: {{ .Values.ports.pgbouncer }}
          readinessProbe:
            tcpSocket:
              port: {{ .Values.ports.pgbouncer }}
          volumeMounts:
            - name: pgbouncer-config
              subPath: pgbouncer.ini
              mountPath: /etc/pgbouncer/pgbouncer.ini
              readOnly: true
            - name: pgbouncer-config
              subPath: users.txt
              mountPath: /etc/pgbouncer/users.txt
              readOnly: true
            {{- if .Values.pgbouncer.ssl.ca }}
            - name: pgbouncer-certificates
              subPath: root.crt
              mountPath: /etc/pgbouncer/root.crt
              readOnly: true
            {{- end }}
            {{- if .Values.pgbouncer.ssl.cert }}
            - name: pgbouncer-certificates
              subPath: server.crt
              mountPath: /etc/pgbouncer/server.crt
              readOnly: true
            {{- end }}
            {{- if .Values.pgbouncer.ssl.key }}
            - name: pgbouncer-certificates
              subPath: server.key
              mountPath: /etc/pgbouncer/server.key
              readOnly: true
            {{- end }}
            {{- if .Values.volumeMounts }}
              {{- toYaml .Values.volumeMounts | nindent 12 }}
            {{- end }}
            {{- if .Values.pgbouncer.extraVolumeMounts }}
              {{- tpl (toYaml .Values.pgbouncer.extraVolumeMounts) . | nindent 12 }}
            {{- end }}
          {{- if $containerLifecycleHooks }}
          lifecycle: {{- tpl (toYaml $containerLifecycleHooks) . | nindent 12 }}
          {{- end }}
        - name: metrics-exporter
          resources: {{- toYaml .Values.pgbouncer.metricsExporterSidecar.resources | nindent 12 }}
          image: {{ template "pgbouncer_exporter_image" . }}
          imagePullPolicy: {{ .Values.images.pgbouncerExporter.pullPolicy }}
          securityContext: {{ $containerSecurityContextMetricsExporter | nindent 12 }}
          env:
            - name: DATABASE_URL
              valueFrom:
                secretKeyRef:
                  name: {{ template "pgbouncer_stats_secret" . }}
                  {{- if (and .Values.pgbouncer.metricsExporterSidecar.statsSecretName .Values.pgbouncer.metricsExporterSidecar.statsSecretKey) }}
                  key: {{ .Values.pgbouncer.metricsExporterSidecar.statsSecretKey }}
                  {{- else }}
                  key: "connection"
                  {{- end }}
          ports:
            - name: metrics
              containerPort: {{ .Values.ports.pgbouncerScrape }}
          livenessProbe:
            exec:
              command:
                - pgbouncer_exporter
                - health
            initialDelaySeconds: {{ .Values.pgbouncer.metricsExporterSidecar.livenessProbe.initialDelaySeconds }}
            periodSeconds: {{ .Values.pgbouncer.metricsExporterSidecar.livenessProbe.periodSeconds }}
            timeoutSeconds: {{ .Values.pgbouncer.metricsExporterSidecar.livenessProbe.timeoutSeconds }}
          readinessProbe:
            exec:
              command:
                - pgbouncer_exporter
                - health
            initialDelaySeconds: {{ .Values.pgbouncer.metricsExporterSidecar.readinessProbe.initialDelaySeconds }}
            periodSeconds: {{ .Values.pgbouncer.metricsExporterSidecar.readinessProbe.periodSeconds }}
            timeoutSeconds: {{ .Values.pgbouncer.metricsExporterSidecar.readinessProbe.timeoutSeconds }}
          {{- if $containerLifecycleHooksMetricsExporter }}
          lifecycle: {{- tpl (toYaml $containerLifecycleHooksMetricsExporter) . | nindent 12 }}
          {{- end }}
        {{- if .Values.pgbouncer.extraContainers }}
          {{- toYaml .Values.pgbouncer.extraContainers | nindent 8 }}
        {{- end }}
      volumes:
        - name: pgbouncer-config
          secret:
            secretName: {{ template "pgbouncer_config_secret" . }}
        {{- if or .Values.pgbouncer.ssl.ca  .Values.pgbouncer.ssl.cert .Values.pgbouncer.ssl.key }}
        - name: pgbouncer-certificates
          secret:
            secretName: {{ template "pgbouncer_certificates_secret" . }}
        {{- end }}
        {{- if .Values.volumes }}
          {{- toYaml .Values.volumes | nindent 8 }}
        {{- end }}
        {{- if .Values.pgbouncer.extraVolumes }}
          {{- tpl (toYaml .Values.pgbouncer.extraVolumes) . | nindent 8 }}
        {{- end }}
{{- end }}
