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feat(cluster): Adding topologySpreadConstraints support to the cluster #818

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feat(cluster): Adding topologySpreadConstraints support to the cluster
miquel-cala Feb 24, 2026
5237521
Merge branch 'main' into feat/topologySpreadConstraints-cluster
miquelpuigmena Mar 5, 2026
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1 change: 1 addition & 0 deletions charts/cluster/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -151,6 +151,7 @@ refer to the [CloudNativePG Documentation](https://cloudnative-pg.io/documentati
| backups.wal.maxParallel | int | `1` | Number of WAL files to be archived or restored in parallel. |
| cluster.additionalLabels | object | `{}` | |
| cluster.affinity | object | `{"topologyKey":"topology.kubernetes.io/zone"}` | Affinity/Anti-affinity rules for Pods. See: https://cloudnative-pg.io/documentation/current/cloudnative-pg.v1/#postgresql-cnpg-io-v1-AffinityConfiguration |
| cluster.topologySpreadConstraints | list | `[]` | TopologySpreadConstraints rules for the cluster. See: https://cloudnative-pg.io/documentation/current/cloudnative-pg.v1/#ClusterSpec |
| cluster.annotations | object | `{}` | |
| cluster.certificates | object | `{}` | The configuration for the CA and related certificates. See: https://cloudnative-pg.io/documentation/current/cloudnative-pg.v1/#postgresql-cnpg-io-v1-CertificatesConfiguration |
| cluster.console.enabled | bool | `false` | Deploys a console StatefulSet to run long-running commands against the cluster (e.g. `CREATE INDEX`). |
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4 changes: 4 additions & 0 deletions charts/cluster/templates/cluster.yaml
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Expand Up @@ -42,6 +42,10 @@ spec:
affinity:
{{- toYaml . | nindent 4 }}
{{- end }}
{{- with .Values.cluster.topologySpreadConstraints }}
topologySpreadConstraints:
{{- toYaml . | nindent 4 }}
{{- end }}
{{- with .Values.cluster.env }}
env:
{{- toYaml . | nindent 4 }}
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59 changes: 59 additions & 0 deletions charts/cluster/values.schema.json
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Expand Up @@ -181,6 +181,65 @@
}
}
},
"topologySpreadConstraints": {
"type": "array",
"items": {
"type": "object",
"properties": {
"maxSkew": {
"type": "integer"
},
"minDomains": {
"type": "integer"
},
"topologyKey": {
"type": "string"
},
"whenUnsatisfiable": {
"type": "string"
},
"labelSelector": {
"type": "object",
"properties": {
"matchLabels": {
"type": "object"
},
"matchExpressions": {
"type": "array",
"items": {
"type": "object",
"properties": {
"key": {
"type": "string"
}
}
}
}
}
},
"matchLabelKeys": {
"type": "array",
"items": {
"type": "string"
}
},
"nodeAffinityPolicy": {
"type": "string",
"enum": [
"Honor",
"Ignore"
]
},
"nodeTaintsPolicy": {
"type": "string",
"enum": [
"Honor",
"Ignore"
]
}
}
}
},
"annotations": {
"type": "object"
},
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10 changes: 10 additions & 0 deletions charts/cluster/values.yaml
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Expand Up @@ -249,6 +249,16 @@ cluster:
affinity:
topologyKey: topology.kubernetes.io/zone

# -- TopologySpreadConstraints for cluster.
# See: https://cloudnative-pg.io/documentation/current/cloudnative-pg.v1/#ClusterSpec
topologySpreadConstraints: []
# - maxSkew: 1
# topologyKey: topology.kubernetes.io/zone
# whenUnsatisfiable: DoNotSchedule
# labelSelector:
# matchLabels:
# cnpg.io/cluster: my-cluster

# -- Env follows the Env format to pass environment variables to the pods created in the cluster
env: []
# - name: MY_CUSTOM_FLAG
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