feat(argo-rollout): Add configurable deployment strategy for Argo Rollouts controller

Signed-off-by: Nedal Eskaif <Nedal.Eskaif@goto.com>

charts/argo-rollouts/Chart.yaml

@@ -1,8 +1,8 @@
 apiVersion: v2
-appVersion: v1.6.4
+appVersion: v1.6.6
 description: A Helm chart for Argo Rollouts
 name: argo-rollouts
-version: 2.34.0
+version: 2.35.0
 home: https://github.com/argoproj/argo-helm
 icon: https://argoproj.github.io/argo-rollouts/assets/logo.png
 keywords:
@@ -18,5 +18,5 @@ annotations:
     fingerprint: 2B8F22F57260EFA67BE1C5824B11F800CD9D2252
     url: https://argoproj.github.io/argo-helm/pgp_keys.asc
   artifacthub.io/changes: |
-    - kind: changed
-      description: Allow setting log config for rollouts dashboard
+    - kind: added
+      description: Allow configuring deployment strategy for the Argo Rollouts controller

charts/argo-rollouts/README.md

@@ -80,6 +80,9 @@ For full list of changes please check ArtifactHub [changelog].
 | controller.containerPorts.healthz | int | `8080` | Healthz container port |
 | controller.containerPorts.metrics | int | `8090` | Metrics container port |
 | controller.createClusterRole | bool | `true` | flag to enable creation of cluster controller role (requires cluster RBAC) |
+| controller.deploymentStrategy.type | string | `""` | Deployment strategy type. Options: "Recreate" or "RollingUpdate". If not specified, defaults to "RollingUpdate". |
+| controller.deploymentStrategy.rollingUpdate.maxSurge | int or string | `0` | Maximum number or percentage of additional pods that can be created during an update. |
+| controller.deploymentStrategy.rollingUpdate.maxUnavailable | int or string | `0` | Maximum number or percentage of pods that can be unavailable during an update. |
 | controller.deploymentAnnotations | object | `{}` | Annotations to be added to the controller deployment |
 | controller.extraArgs | list | `[]` | Additional command line arguments to pass to rollouts-controller.  A list of flags. |
 | controller.extraContainers | list | `[]` | Literal yaml for extra containers to be added to controller deployment. |

charts/argo-rollouts/templates/controller/deployment.yaml

@@ -17,8 +17,13 @@ spec:
     matchLabels:
       app.kubernetes.io/component: {{ .Values.controller.component }}
       {{- include "argo-rollouts.selectorLabels" . | nindent 6 }}
+  {{- if .Values.controller.deploymentStrategy }}
   strategy:
-    type: Recreate
+    {{- toYaml .Values.controller.deploymentStrategy | nindent 4 }}
+  {{- else }}
+  strategy:
+    type: RollingUpdate
+  {{- end }}
   replicas: {{ .Values.controller.replicas }}
   template:
     metadata:

charts/argo-rollouts/values.yaml

@@ -45,6 +45,14 @@ global:
 controller:
   # -- Value of label `app.kubernetes.io/component`
   component: rollouts-controller
+
+  # -- Configuration for the deployment strategy defaults to RollingUpdate
+  deploymentStrategy: {}
+    # type: RollingUpdate
+    # rollingUpdate:
+    #   maxSurge: 25%
+    #   maxUnavailable: 25%
+
   # -- Annotations to be added to the controller deployment
   deploymentAnnotations: {}
   # -- Annotations to be added to application controller pods