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[postgresql-ha] Use pgpool service as db connection proxy (#542)

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### Description of the change

The `postgresql-ha` provides a dedicated deployment and service called `pgpool`. This application is a proxy that routes the db queries to the active database replica. There's a note about that in their README[^1].

Issue #502 is a side-effect of not using that proxy.

### Possible drawbacks

Using the Charts' default configuration, the `pgpool` deployment has 1 replica, making this a single-point of failure. But users can change the related `postgresql-ha.pgpool.replicaCount` to their needs.

### Applicable issues

- fixes #502

### Checklist

- [x] Templating unittests are added

[^1]: https://github.com/bitnami/charts/blob/main/bitnami/postgresql-ha/templates/postgresql/statefulset.yaml#introduction

Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/542
Reviewed-by: pat-s <pat-s@noreply.gitea.com>
Co-authored-by: justusbunsi <sk.bunsenbrenner@gmail.com>
Co-committed-by: justusbunsi <sk.bunsenbrenner@gmail.com>
This commit is contained in:
justusbunsi
2023-10-14 16:05:59 +00:00
committed by pat-s
parent 0cc8c6d558
commit b68b9d91cf
3 changed files with 61 additions and 1 deletions
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2
templates/_helpers.tpl
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@ -119,7 +119,7 @@ app.kubernetes.io/instance: {{ .Release.Name }}
{{- define "postgresql-ha.dns" -}}
{{- if (index .Values "postgresql-ha").enabled -}}
{{- printf "%s-postgresql-ha-postgresql.%s.svc.%s:%g" .Release.Name .Release.Namespace .Values.clusterDomain (index .Values "postgresql-ha" "service" "ports" "postgresql") -}}
{{- printf "%s-postgresql-ha-pgpool.%s.svc.%s:%g" .Release.Name .Release.Namespace .Values.clusterDomain (index .Values "postgresql-ha" "service" "ports" "postgresql") -}}
{{- end -}}
{{- end -}}