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 -}}