Add custom postgresql configuration in helm chart

charts/postgresql-ha/templates/_configuration.tpl

@@ -0,0 +1,88 @@
+{{/*
+Return Postgresql - memory
+*/}}
+{{- define "postgresql-ha.configuration.postgresql.memory" -}}
+{{- $memory := required "postgresql.resources.limits.memory is required" .Values.postgresql.resources.limits.memory | trim -}}
+{{- if hasSuffix "Gi" $memory -}}
+    {{ mul (int (trimSuffix "Gi" $memory)) 1024 }}
+{{- else if hasSuffix "GB" $memory  -}}
+    {{ mul (int (trimSuffix "GB" $memory)) 1000 }}
+{{- else if hasSuffix "Mi" $memory  -}}
+    {{ int (trimSuffix "Mi" $memory) }}
+{{- else if hasSuffix "MB" $memory -}}
+    {{ int (trimSuffix "MB" $memory) }}
+{{- else -}}
+    {{ fail "`postgresql.resources.limits.memory` 값이 올바른 형식으로 설정되지 않았습니다. (예: '10Gi', '512Mi')" }}
+{{- end -}}
+{{- end }}
+
+{{/*
+Return Postgresql - shared memory.
+*/}}
+{{- define "postgresql-ha.configuration.postgresql.sharedMemory" -}}
+{{- $memory := include "postgresql-ha.configuration.postgresql.memory" . | int -}}
+{{- if gt $memory 256 -}}
+    {{ div $memory 4 }}Mi
+{{- end }}
+{{- "" -}}
+{{- end }}
+
+{{/*
+Return postgres.conf.
+*/}}
+{{- define "postgresql-ha.configuration.postgresConf" -}}
+{{- $memory := include "postgresql-ha.configuration.postgresql.memory" . | int -}}
+listen_addresses = '*'
+port = {{ .Values.postgresql.containerPorts.postgresql | quote }}
+password_encryption = md5              
+
+wal_level = 'replica'
+archive_mode = 'on'
+archive_command = '/bin/true'
+max_wal_senders = {{ add .Values.postgresql.replicaCount 2 }}
+max_replication_slots = '10'
+hot_standby = 'on'
+logging_collector = 'on'
+log_directory = '/opt/bitnami/postgresql/logs'
+log_filename = 'postgresql.log'
+log_connections = 'false'
+log_disconnections = 'false'
+log_hostname = 'true'
+client_min_messages = 'error'
+pg_stat_statements.max = 10000
+pg_stat_statements.track = all
+include_dir = 'conf.d'
+pgaudit.log_catalog = 'off'
+
+wal_buffers = -1
+max_wal_size = 10GB
+min_wal_size = 1GB
+
+shared_buffers = {{ div $memory 4 }}MB
+
+effective_cache_size = {{ mul (div $memory 4) 3 }}MB
+random_page_cost = 2.0
+
+{{- if ge $memory 16384 }}
+maintenance_work_mem = 2GB
+work_mem = {{ div (subf $memory (div $memory 4)  2048) .Values.postgresql.maxConnections }}MB
+{{- else if ge $memory 8192 }}
+maintenance_work_mem = 1GB
+work_mem = {{ div (subf $memory (div $memory 4)  1024) .Values.postgresql.maxConnections }}MB
+{{- else }}
+maintenance_work_mem = 512MB
+work_mem = {{ div (subf $memory (div $memory 4)  512) .Values.postgresql.maxConnections }}MB
+{{- end }}
+
+log_min_duration_statement = 3000
+
+{{- $tzEnv := "" }}
+{{- range .Values.postgresql.extraEnvVars -}}
+  {{- if eq  "TZ" .name -}}
+    {{- $tzEnv = .value -}}
+  {{- end -}}
+{{- end -}}
+{{- if $tzEnv }}
+timezone={{ $tzEnv }}
+{{- end -}}
+{{- end -}}

charts/postgresql-ha/templates/postgresql/configmap.yaml

@@ -27,4 +27,18 @@ data:
   pg_hba.conf: |-
     {{- include "common.tplvalues.render" ( dict "value" .Values.postgresql.pgHbaConfiguration "context" $ ) | nindent 4 }}
   {{- end }}
+{{- else }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ printf "%s-configuration" (include "postgresql-ha.postgresql" .) }}
+  namespace: {{ include "common.names.namespace" . | quote }}
+  labels: {{- include "common.labels.standard" ( dict "customLabels" .Values.commonLabels "context" $ ) | nindent 4 }}
+    app.kubernetes.io/component: postgresql
+  {{- if .Values.commonAnnotations }}
+  annotations: {{- include "common.tplvalues.render" ( dict "value" .Values.commonAnnotations "context" $ ) | nindent 4 }}
+  {{- end }}
+data:
+  postgresql.conf: |-
+    {{- include "postgresql-ha.configuration.postgresConf" . | nindent 4 }}
 {{- end }}

charts/postgresql-ha/templates/postgresql/statefulset.yaml

@@ -458,6 +458,10 @@ spec:
             {{- if .Values.postgresql.extraVolumeMounts }}
             {{- include "common.tplvalues.render" (dict "value" .Values.postgresql.extraVolumeMounts "context" $) | nindent 12 }}
             {{- end }}
+            {{- if ( include "postgresql-ha.configuration.postgresql.sharedMemory" . ) }}
+            - name: dshm
+              mountPath: /dev/shm
+            {{- end }}
         {{- if .Values.metrics.enabled }}
         - name: metrics
           image: {{ include "postgresql-ha.metrics.image" . }}
@@ -598,6 +602,12 @@ spec:
         - name: postgresql-certificates
           emptyDir: {}
         {{- end }}
+        {{- if ( include "postgresql-ha.configuration.postgresql.sharedMemory" . ) }}
+        - name: dshm
+          emptyDir:
+            medium: Memory
+            sizeLimit: {{ include "postgresql-ha.configuration.postgresql.sharedMemory" . }}
+        {{- end }}
       {{- if and .Values.persistence.enabled .Values.persistence.existingClaim }}
         - name: data
           persistentVolumeClaim: