From c09c81dd3f37e56e1b5013a97e48f0a848c53c7d Mon Sep 17 00:00:00 2001
From: Elliot Courant <me@elliotcourant.dev>
Date: Fri, 30 Aug 2024 20:24:40 -0500
Subject: [PATCH] feat(cnpg): Adding `topologySpreadConstraints` support to the
 deployment

This adds support for specifying
[`topologySpreadConstraints`](https://kubernetes.io/docs/concepts/scheduling-eviction/topology-spread-constraints/)
for the cloudnative-pg operator deployment.

Resolves #371

Signed-off-by: Elliot Courant <me@elliotcourant.dev>
---
 charts/cloudnative-pg/README.md                 | 1 +
 charts/cloudnative-pg/templates/deployment.yaml | 4 ++++
 charts/cloudnative-pg/values.schema.json        | 3 +++
 charts/cloudnative-pg/values.yaml               | 3 +++
 4 files changed, 11 insertions(+)

diff --git a/charts/cloudnative-pg/README.md b/charts/cloudnative-pg/README.md
index 3083109e8..6d9a689bc 100644
--- a/charts/cloudnative-pg/README.md
+++ b/charts/cloudnative-pg/README.md
@@ -73,5 +73,6 @@ CloudNativePG Operator Helm Chart
 | serviceAccount.create | bool | `true` | Specifies whether the service account should be created. |
 | serviceAccount.name | string | `""` | The name of the service account to use. If not set and create is true, a name is generated using the fullname template. |
 | tolerations | list | `[]` | Tolerations for the operator to be installed. |
+| topologySpreadConstraints | list | `[]` | [Topology Spread Constraints](https://kubernetes.io/docs/concepts/scheduling-eviction/topology-spread-constraints/) for the operator to be installed. |
 | webhook | object | `{"livenessProbe":{"initialDelaySeconds":3},"mutating":{"create":true,"failurePolicy":"Fail"},"port":9443,"readinessProbe":{"initialDelaySeconds":3},"validating":{"create":true,"failurePolicy":"Fail"}}` | The webhook configuration. |
 
diff --git a/charts/cloudnative-pg/templates/deployment.yaml b/charts/cloudnative-pg/templates/deployment.yaml
index 569752007..9d590c656 100644
--- a/charts/cloudnative-pg/templates/deployment.yaml
+++ b/charts/cloudnative-pg/templates/deployment.yaml
@@ -127,6 +127,10 @@ spec:
       nodeSelector:
         {{- toYaml . | nindent 8 }}
       {{- end }}
+      {{- with .Values.topologySpreadConstraints }}
+      topologySpreadConstraints:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
       {{- with .Values.affinity }}
       affinity:
         {{- toYaml . | nindent 8 }}
diff --git a/charts/cloudnative-pg/values.schema.json b/charts/cloudnative-pg/values.schema.json
index 63fba0454..784463cf1 100644
--- a/charts/cloudnative-pg/values.schema.json
+++ b/charts/cloudnative-pg/values.schema.json
@@ -11,6 +11,9 @@
         "affinity": {
             "type": "object"
         },
+        "topologySpreadConstraints": {
+            "type": "array"
+        },
         "commonAnnotations": {
             "type": "object"
         },
diff --git a/charts/cloudnative-pg/values.yaml b/charts/cloudnative-pg/values.yaml
index a95165ffd..39c1fd764 100644
--- a/charts/cloudnative-pg/values.yaml
+++ b/charts/cloudnative-pg/values.yaml
@@ -141,6 +141,9 @@ resources: {}
 # -- Nodeselector for the operator to be installed.
 nodeSelector: {}
 
+# -- Topology Spread Constraints for the operator to be installed.
+topologySpreadConstraints: []
+
 # -- Tolerations for the operator to be installed.
 tolerations: []