feat(argo-workflows): add loadBalancerClass field for Service resources

Most users of ArgoCD may use `Ingress` (and soon `HTTPRoute`), but for those who may want to use `Service` of type `LoadBalancer`, this would be useful.
The `loadBalancerClass` field would allow for a `CloudProvider` agnostic way of offloading the reconciliation for Kubernetes Service resources of type `LoadBalancer` to an external controller.

Signed-off-by: Gazal Gafoor <gazal.gafoor@rea-group.com>

charts/argo-workflows/Chart.yaml

@@ -3,7 +3,7 @@ appVersion: v3.5.8
 name: argo-workflows
 description: A Helm chart for Argo Workflows
 type: application
-version: 0.41.11
+version: 0.41.12
 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: fixed
+    - kind: changed
-      description: Add `app:` label to components to match upstream
+      description: add loadBalancerClass field for Service resources

charts/argo-workflows/README.md

@@ -167,6 +167,7 @@ Fields to note:
 | controller.kubeConfig | object | `{}` (See [values.yaml]) | Configure when workflow controller runs in a different k8s cluster with the workflow workloads, or needs to communicate with the k8s apiserver using an out-of-cluster kubeconfig secret. |
 | controller.links | list | `[]` | Configure Argo Server to show custom [links] |
 | controller.livenessProbe | object | See [values.yaml] | Configure liveness [probe] for the controller |
+| controller.loadBalancerClass | string | `""` | The class of the load balancer implementation |
 | controller.loadBalancerSourceRanges | list | `[]` | Source ranges to allow access to service from. Only applies to service type `LoadBalancer` |
 | controller.logging.format | string | `"text"` | Set the logging format (one of: `text`, `json`) |
 | controller.logging.globallevel | string | `"0"` | Set the glog logging level |
@@ -301,6 +302,7 @@ Fields to note:
 | server.ingress.pathType | string | `"Prefix"` | Ingress path type. One of `Exact`, `Prefix` or `ImplementationSpecific` |
 | server.ingress.paths | list | `["/"]` | List of ingress paths |
 | server.ingress.tls | list | `[]` | Ingress TLS configuration |
+| server.loadBalancerClass | string | `""` | The class of the load balancer implementation |
 | server.loadBalancerIP | string | `""` | Static IP address to assign to loadBalancer service type `LoadBalancer` |
 | server.loadBalancerSourceRanges | list | `[]` | Source ranges to allow access to service from. Only applies to service type `LoadBalancer` |
 | server.logging.format | string | `"text"` | Set the logging format (one of: `text`, `json`) |

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

@@ -35,8 +35,13 @@ spec:
   {{- if and (eq .Values.controller.serviceType "ClusterIP") .Values.controller.metricsConfig.headlessService }}
   clusterIP: None
   {{- end }}
-  {{- if and (eq .Values.controller.serviceType "LoadBalancer") .Values.controller.loadBalancerSourceRanges }}
+  {{- if eq .Values.controller.serviceType "LoadBalancer" }}
+  {{- with .Values.controller.loadBalancerClass }}
+  loadBalancerClass: {{ . }}
+  {{- end }}
+  {{- if .Values.controller.loadBalancerSourceRanges }}
   loadBalancerSourceRanges:
     {{- toYaml .Values.controller.loadBalancerSourceRanges | nindent 4 }}
   {{- end }}
+  {{- end }}
 {{- end -}}

charts/argo-workflows/templates/server/server-service.yaml

@@ -28,11 +28,16 @@ spec:
     {{- include "argo-workflows.selectorLabels" (dict "context" . "name" .Values.server.name) | nindent 4 }}
   sessionAffinity: None
   type: {{ .Values.server.serviceType }}
-  {{- if and (eq .Values.server.serviceType "LoadBalancer") .Values.server.loadBalancerIP }}
+  {{- if eq .Values.server.serviceType "LoadBalancer" }}
-  loadBalancerIP: {{ .Values.server.loadBalancerIP | quote }}
+  {{- with .Values.controller.loadBalancerClass }}
+  loadBalancerClass: {{ . }}
   {{- end }}
-  {{- if and (eq .Values.server.serviceType "LoadBalancer") .Values.server.loadBalancerSourceRanges }}
+  {{- with .Values.server.loadBalancerIP }}
+  loadBalancerIP: {{ . | quote }}
+  {{- end }}
+  {{- if .Values.server.loadBalancerSourceRanges }}
   loadBalancerSourceRanges:
     {{- toYaml .Values.server.loadBalancerSourceRanges | nindent 4 }}
   {{- end }}
+  {{- end }}
 {{- end -}}

charts/argo-workflows/values.yaml

@@ -295,6 +295,8 @@ controller:
   serviceAnnotations: {}
   # -- Optional labels to add to the controller Service
   serviceLabels: {}
+  # -- The class of the load balancer implementation
+  loadBalancerClass: ""
   # -- Source ranges to allow access to service from. Only applies to service type `LoadBalancer`
   loadBalancerSourceRanges: []
 
@@ -506,6 +508,8 @@ server:
   serviceAnnotations: {}
   # -- Optional labels to add to the UI Service
   serviceLabels: {}
+  # -- The class of the load balancer implementation
+  loadBalancerClass: ""
   # -- Static IP address to assign to loadBalancer service type `LoadBalancer`
   loadBalancerIP: ""
   # -- Source ranges to allow access to service from. Only applies to service type `LoadBalancer`