Automatic postgresql host discovery

kubernetes/templates/_helpers.tpl

@@ -14,3 +14,14 @@ We truncate at 63 chars because some Kubernetes name fields are limited to this
 {{- $name := default .Chart.Name .Values.nameOverride -}}
 {{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
 {{- end -}}
+
+{{/*
+Return postgresql host (autogenerated if `postgresql.enabled, user provided else)
+*/}}
+{{- define "invidious.pghost" -}}
+{{- if empty .Values.config.db.host -}}
+{{ .Release.Name }}-postgresql
+{{- else -}}
+{{ .Values.config.db.host }}
+{{- end -}}
+{{- end -}}

kubernetes/templates/configmap.yaml

@@ -1,3 +1,12 @@
+{{- define "invidious.pghost_inject" -}}
+{{- if empty .Values.config.db.host -}}
+config:
+  db:
+    host: {{ template "invidious.pghost" . }}
+{{- end -}}
+{{- end -}}
+{{ $_ := mergeOverwrite .Values (include "invidious.pghost_inject" . | fromYaml) -}}
+
 apiVersion: v1
 kind: ConfigMap
 metadata:

kubernetes/templates/deployment.yaml

@@ -29,7 +29,7 @@ spec:
           args:
           - /bin/sh
           - -c
-          - until pg_isready -h {{ .Values.config.db.host }} -p {{ .Values.config.db.port }} -U {{ .Values.config.db.user }}; do echo waiting for database; sleep 2; done;
+          - until pg_isready -h {{ template "invidious.pghost" . }} -p {{ .Values.config.db.port }} -U {{ .Values.config.db.user }}; do echo waiting for database; sleep 2; done;
         - name: db-migration
           image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
           imagePullPolicy: {{ .Values.image.pullPolicy }}

kubernetes/values.yaml

@@ -65,7 +65,8 @@ config:
   db:
     user: kemal
     password: kemal
-    host: invidious-postgresql
+    #-- Leave empty if you use embeded postgresql server
+    host:
     port: 5432
     dbname: invidious
   full_refresh: false