feat(argo-workflows): add a sample HA config

- a `values-ha.yaml` as an example for how one would set-up HA according to the Argo Workflows docs

Signed-off-by: Anton Gilgur <agilgur5@gmail.com>

charts/argo-workflows/Chart.yaml

@@ -3,7 +3,7 @@ appVersion: v3.4.9
 name: argo-workflows
 description: A Helm chart for Argo Workflows
 type: application
-version: 0.32.1
+version: 0.33.0
 icon: https://argoproj.github.io/argo-workflows/assets/logo.png
 home: https://github.com/argoproj/argo-helm
 sources:
@@ -17,4 +17,4 @@ annotations:
     url: https://argoproj.github.io/argo-helm/pgp_keys.asc
   artifacthub.io/changes: |
     - kind: added
-      description: Add support for executor args
+      description: Add a sample HA config

charts/argo-workflows/values-ha.yaml

@@ -0,0 +1,23 @@
+# Sample values for High Availability configuration, following https://argoproj.github.io/argo-workflows/high-availability/
+
+controller:
+  # in v3.0+, a second controller can be ran as a hot-standby: https://argoproj.github.io/argo-workflows/high-availability/#workflow-controller
+  replicas: 2 # should be strictly greater than PDB minAvailable
+  # enable PDB with at least one Pod
+  pdb:
+    # -- Configure [Pod Disruption Budget] for the controller pods
+    enabled: true
+    minAvailable: 1
+
+server:
+  # enable HPA with at least two Pods
+  autoscaling:
+    # -- Enable Horizontal Pod Autoscaler ([HPA]) for the Argo Server
+    enabled: true
+    # -- Minimum number of replicas for the Argo Server [HPA]
+    minReplicas: 2 # should be strictly greater than PDB minAvailable
+  # enable PDB with at least one Pod
+  pdb:
+    # -- Configure [Pod Disruption Budget] for the controller pods
+    enabled: true
+    minAvailable: 1