feat(argo-workflows): Disable leader election on single repl controllers (#2565)

Signed-off-by: Tim Collins <tim@thecollins.team>
Co-authored-by: Aikawa <yu.croco@gmail.com>

charts/argo-workflows/Chart.yaml

@@ -3,7 +3,7 @@ appVersion: v3.5.5
 name: argo-workflows
 description: A Helm chart for Argo Workflows
 type: application
-version: 0.40.12
+version: 0.40.13
 icon: https://argo-workflows.readthedocs.io/en/stable/assets/logo.png
 home: https://github.com/argoproj/argo-helm
 sources:
@@ -16,5 +16,5 @@ annotations:
     fingerprint: 2B8F22F57260EFA67BE1C5824B11F800CD9D2252
     url: https://argoproj.github.io/argo-helm/pgp_keys.asc
   artifacthub.io/changes: |
-    - kind: changed
-      description: Bump argo-workflows to v3.5.5
+    - kind: added
+      description: Disable leader election if only 1 repl of the Workflow Controller

charts/argo-workflows/templates/controller/workflow-controller-deployment.yaml

@@ -89,6 +89,10 @@ spec:
                 fieldRef:
                   apiVersion: v1
                   fieldPath: metadata.name
+          {{- if eq (int .Values.controller.replicas) 1 }}
+            - name: LEADER_ELECTION_DISABLE
+              value: "true"
+          {{- end }}
           {{- with .Values.controller.extraEnv }}
             {{- toYaml . | nindent 12 }}
           {{- end }}