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K8s: Gate distributed component replicas on external datastore #3175

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Merged
VietND96 merged 1 commit into from
Jul 13, 2026
Merged

K8s: Gate distributed component replicas on external datastore #3175

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16 changes: 16 additions & 0 deletions charts/selenium-grid/templates/_helpers.tpl
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Original file line number Diff line number Diff line change
Expand Up @@ -340,6 +340,22 @@ Component update strategy template
{{ $spec | nindent 4 }}
{{- end -}}

{{/*
Replica count for a distributed component (Distributor, SessionQueue, SessionMap).
The value from `.replicas` is honored only when the component's external datastore is
enabled, since replicas share state through it. Without an external datastore, running
multiple replicas would break the grid (no shared state), so the count is forced to 1.
Pass the component config, e.g. `.Values.components.distributor`.
*/}}
{{- define "seleniumGrid.component.replicaCount" -}}
{{- $component := . -}}
{{- if (dig "externalDatastore" "enabled" false $component) -}}
{{- max 1 ($component.replicas | int) -}}
{{- else -}}
1
{{- end -}}
{{- end -}}

{{/*
Common pod template
*/}}
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2 changes: 1 addition & 1 deletion charts/selenium-grid/templates/distributor-deployment.yaml
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Expand Up @@ -11,7 +11,7 @@ metadata:
spec:
strategy:
{{- template "seleniumGrid.updateStrategy" (list $.Values.components.distributor $.Values.global.seleniumGrid) }}
replicas: {{ max 1 (.Values.components.distributor.replicas | int) }}
replicas: {{ include "seleniumGrid.component.replicaCount" .Values.components.distributor }}
revisionHistoryLimit: {{ .Values.global.seleniumGrid.revisionHistoryLimit }}
selector:
matchLabels:
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2 changes: 1 addition & 1 deletion charts/selenium-grid/templates/session-map-deployment.yaml
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Expand Up @@ -11,7 +11,7 @@ metadata:
spec:
strategy:
{{- template "seleniumGrid.updateStrategy" (list $.Values.components.sessionMap $.Values.global.seleniumGrid) }}
replicas: {{ max 1 (.Values.components.sessionMap.replicas | int) }}
replicas: {{ include "seleniumGrid.component.replicaCount" .Values.components.sessionMap }}
revisionHistoryLimit: {{ .Values.global.seleniumGrid.revisionHistoryLimit }}
selector:
matchLabels:
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2 changes: 1 addition & 1 deletion charts/selenium-grid/templates/session-queue-deployment.yaml
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Expand Up @@ -11,7 +11,7 @@ metadata:
spec:
strategy:
{{- template "seleniumGrid.updateStrategy" (list $.Values.components.sessionQueue $.Values.global.seleniumGrid) }}
replicas: {{ max 1 (.Values.components.sessionQueue.replicas | int) }}
replicas: {{ include "seleniumGrid.component.replicaCount" .Values.components.sessionQueue }}
revisionHistoryLimit: {{ .Values.global.seleniumGrid.revisionHistoryLimit }}
selector:
matchLabels:
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