apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: {{ include "invy.fullname" . }}-db
  labels:
    {{- include "invy.labels" . | nindent 4 }}
    app.kubernetes.io/component: database
spec:
  serviceName: {{ include "invy.fullname" . }}-db-headless
  replicas: 1
  selector:
    matchLabels:
      {{- include "invy.selectorLabels" . | nindent 6 }}
      app.kubernetes.io/component: database
  template:
    metadata:
      labels:
        {{- include "invy.selectorLabels" . | nindent 8 }}
        app.kubernetes.io/component: database
    spec:
      containers:
      - name: postgres
        image: "{{ .Values.postgres.image.repository }}:{{ .Values.postgres.image.tag }}"
        imagePullPolicy: {{ .Values.postgres.image.pullPolicy }}
        ports:
        - name: postgres
          containerPort: {{ .Values.postgres.port }}
          protocol: TCP
        env:
        - name: POSTGRES_USER
          valueFrom:
            secretKeyRef:
              name: {{ include "invy.fullname" . }}-secrets
              key: postgres-user
        - name: POSTGRES_PASSWORD
          valueFrom:
            secretKeyRef:
              name: {{ include "invy.fullname" . }}-secrets
              key: postgres-password
        - name: POSTGRES_DB
          valueFrom:
            secretKeyRef:
              name: {{ include "invy.fullname" . }}-secrets
              key: postgres-database
        - name: PGDATA
          value: /var/lib/postgresql/data/pgdata
        - name: POSTGRES_INITDB_ARGS
          value: "--encoding=UTF8 --lc-collate=en_US.UTF-8 --lc-ctype=en_US.UTF-8"
        command:
          - postgres
          - -c
          - max_connections=200
          - -c
          - shared_buffers=256MB
          - -c
          - effective_cache_size=1GB
          - -c
          - maintenance_work_mem=64MB
          - -c
          - checkpoint_completion_target=0.9
          - -c
          - wal_buffers=16MB
          - -c
          - default_statistics_target=100
          - -c
          - random_page_cost=1.1
          - -c
          - effective_io_concurrency=200
          - -c
          - work_mem=2621kB
          - -c
          - huge_pages=off
          - -c
          - min_wal_size=1GB
          - -c
          - max_wal_size=4GB
          - -c
          - statement_timeout=30000
          - -c
          - idle_in_transaction_session_timeout=60000
          - -c
          - tcp_keepalives_idle=60
          - -c
          - tcp_keepalives_interval=10
          - -c
          - tcp_keepalives_count=10
        volumeMounts:
        - name: postgres-data
          mountPath: /var/lib/postgresql/data
        - name: init-script
          mountPath: /docker-entrypoint-initdb.d
        resources:
          {{- toYaml .Values.postgres.resources | nindent 12 }}
        livenessProbe:
          exec:
            command:
            - pg_isready
            - -U
            - $(POSTGRES_USER)
          initialDelaySeconds: 30
          periodSeconds: 10
        readinessProbe:
          exec:
            command:
            - pg_isready
            - -U
            - $(POSTGRES_USER)
          initialDelaySeconds: 5
          periodSeconds: 5
      volumes:
      - name: init-script
        configMap:
          name: {{ include "invy.fullname" . }}-db-schema
  {{- if .Values.postgres.persistence.enabled }}
  volumeClaimTemplates:
  - metadata:
      name: postgres-data
    spec:
      accessModes:
        - {{ .Values.postgres.persistence.accessMode }}
      {{- if .Values.postgres.persistence.storageClass }}
      storageClassName: {{ .Values.postgres.persistence.storageClass }}
      {{- end }}
      resources:
        requests:
          storage: {{ .Values.postgres.persistence.size }}
  {{- else }}
      - name: postgres-data
        emptyDir: {}
  {{- end }}