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feat(helm): make gateway PVC size and StorageClass configurable

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Seit 29.9.2026.

  • #3854 von @lunarwhite — offen

Bewertung

Schwierigkeit
4/5
Geschätzter Aufwand
3-5 Tage
Anfängerfreundlichkeit
52/100
Issue-Typ
Feature
Klarheit
Größtenteils klar
Aktivitätsstatus
Aktiv
Tech-Stack
helm, kubernetes

Rechercherichtung

Beginne damit, die volumeClaimTemplates des gateway StatefulSet und die vorhandenen workspace-PVC-Werte im Helm-Chart zu lokalisieren, wobei das veröffentlichte Chart 0.0.116 als Baseline verwendet wird. Führe helm template mit Standardwerten und überschriebenen Werten aus, um die Claim-Größe und StorageClass des gateway zu überprüfen, und decke diese Fälle anschließend in Helm-Tests ab. Dokumentiere außerdem die Auswirkungen der Unveränderlichkeit von StatefulSet/PVC bei Upgrades.

Vom Indexierungsmodell aus dem Issue-Text verfasst.

Beschreibung

state:accepted

User Story

As a Kubernetes platform operator deploying the OpenShell gateway through Helm, I want to select the gateway PVC's size and StorageClass, so that encrypted gateway state lands on the cluster's retained stateful storage with capacity appropriate to the deployment.

Problem Statement

OpenShell Helm chart 0.0.116 hard-codes the StatefulSet volumeClaimTemplates request to 1Gi and does not set or expose storageClassName. The chart exposes workspace PVC size/class values, but not the gateway database claim.

Impact / Why This Matters

Without chart values, operators must accept the cluster's default StorageClass and fixed capacity or carry a post-render patch. This can put the gateway's encrypted credential database and control-plane state on an unintended storage tier. A later correction may require StatefulSet/PVC migration because volumeClaimTemplates fields are immutable in common upgrade paths. Post-render patches are also coupled to the template's claim order.

Proposed Design

Expose a small gateway persistence block in Helm values, for example:

persistence:
  size: 1Gi
  storageClassName: ""

The existing observable behavior should remain the default: a 1Gi claim using the cluster's default StorageClass when no values are set. Setting these values should render the requested capacity and storageClassName into the gateway StatefulSet. Naming is illustrative; the important user workflow is being able to declare both fields without a post-renderer.

Acceptance Criteria

  • The gateway PVC request size is configurable through a documented chart value.
  • The gateway PVC StorageClass is configurable through a documented chart value.
  • Omitting the new values preserves the current 1Gi/default-StorageClass behavior.
  • helm template tests cover default and overridden values.
  • Upgrade documentation notes the StatefulSet/PVC immutability implications for existing releases.

Alternatives Considered

  • Use the cluster's default StorageClass and expand the claim later. This does not guarantee the required retention/storage tier and depends on expansion support.
  • Pre-create a PVC. The StatefulSet currently owns a volumeClaimTemplate and has no existing-claim workflow.
  • Carry a Flux/Helm post-render patch. This works, but is coupled to the StatefulSet resource name and claim index, and it shifts a normal storage choice out of the chart's supported interface.

Agent Investigation

  • Verified the behavior against the released chart 0.0.116 at OCI digest sha256:df55cd1538bdfb7836834c30dfcf8373b85ffea83bbfd70d50dbe69407a0d2b3.
  • Rendering with production values still produces resources.requests.storage: 1Gi and no storageClassName until a post-render patch is applied.
  • Searched open and closed issues for Helm persistence, volumeClaimTemplates, storage size, and StorageClass; no existing issue matched this gateway PVC gap.

Checklist

  • I've reviewed existing issues and the architecture docs
  • This is a design proposal, not a "please build this" request
Vorherrschende Sprache
Rust
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1 T. 21 Std.
Gemergte PRs (30 T.)
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Entwicklungsumgebung

Erste Schritte

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  3. Forken Sie das Repository und arbeiten Sie in einem Branch.
  4. Öffnen Sie einen Pull Request, der die Issue-Nummer nennt.

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