Add topologySpreadConstraints to Deployment (#859)

aws · Jul 24, 2023 · 2e82ab1 · 2e82ab1
1 parent 3c86896
commit 2e82ab1
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Showing 3 changed files with 7 additions and 1 deletion.
diff --git a/config/helm/aws-node-termination-handler/README.md b/config/helm/aws-node-termination-handler/README.md
@@ -119,7 +119,7 @@ The configuration in this table applies to AWS Node Termination Handler in queue
 | `checkASGTagBeforeDraining`  | [DEPRECATED](Use `checkTagBeforeDraining` instead) If `true`, check that the instance is tagged with the `managedAsgTag` before draining the node. If `false`, disables calls ASG API.                                                                          | `true`                                 |
 | `managedAsgTag`              | [DEPRECATED](Use `managedTag` instead) The node tag to check if `checkASGTagBeforeDraining` is `true`.     
 | `useProviderId`              | If `true`, fetch node name through Kubernetes node spec ProviderID instead of AWS event PrivateDnsHostname.                                                               | `false`                                |
-
+| `topologySpreadConstraints`  | [Topology Spread Constraints](https://kubernetes.io/docs/concepts/scheduling-eviction/topology-spread-constraints/) for pod scheduling. Useful with a highly available deployment to reduce the risk of running multiple replicas on the same Node      | `[]`                                   |
 ### IMDS Mode Configuration
 
 The configuration in this table applies to AWS Node Termination Handler in IMDS mode.

diff --git a/config/helm/aws-node-termination-handler/templates/deployment.yaml b/config/helm/aws-node-termination-handler/templates/deployment.yaml
@@ -210,4 +210,8 @@ spec:
       tolerations:
         {{- toYaml . | nindent 8 }}
       {{- end }}
+      {{- with .Values.topologySpreadConstraints }}
+      topologySpreadConstraints:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
 {{- end }}
diff --git a/config/helm/aws-node-termination-handler/values.yaml b/config/helm/aws-node-termination-handler/values.yaml
@@ -52,6 +52,8 @@ affinity: {}
 
 tolerations: []
 
+topologySpreadConstraints: []
+
 # Extra environment variables
 extraEnv: []