add subset minReplicas&maxReplicas api for UnitedDeployment

Signed-off-by: mingzhou.swx <[email protected]>

apis/apps/v1alpha1/uniteddeployment_types.go

@@ -189,8 +189,23 @@ type Subset struct {
 	// percentage like '10%', which means 10% of UnitedDeployment replicas of pods will be distributed
 	// under this subset. If nil, the number of replicas in this subset is determined by controller.
 	// Controller will try to keep all the subsets with nil replicas have average pods.
+	// Replicas and MinReplicas/MaxReplicas are mutually exclusive in a UnitedDeployment.
 	// +optional
 	Replicas *intstr.IntOrString `json:"replicas,omitempty"`
+
+	// Indicates the lower bounded replicas of the subset.
+	// MinReplicas must be more than or equal to 0.
+	// Spec.Replicas must be more than or equal the sum of MinReplicas of all subsets.
+	// Defaults to 0.
+	MinReplicas *intstr.IntOrString `json:"minReplicas"`
+
+	// Indicates the upper bounded replicas of the subset.
+	// MaxReplicas must be more than or equal to MinReplicas.
+	// MaxReplicas == nil means no limitation.
+	// Please ensure that at least one subset has empty MaxReplicas(no limitation) to avoid stuck scaling.
+	// Defaults to nil.
+	MaxReplicas *intstr.IntOrString `json:"maxReplicas,omitempty"`
+
 	// Patch indicates patching to the templateSpec.
 	// Patch takes precedence over other fields
 	// If the Patch also modifies the Replicas, NodeSelectorTerm or Tolerations, use value in the Patch

config/crd/bases/apps.kruise.io_uniteddeployments.yaml

@@ -975,6 +975,25 @@ spec:
                     items:
                       description: Subset defines the detail of a subset.
                       properties:
+                        maxReplicas:
+                          anyOf:
+                          - type: integer
+                          - type: string
+                          description: Indicates the upper bounded replicas of the
+                            subset. MaxReplicas must be more than or equal to MinReplicas.
+                            MaxReplicas == nil means no limitation. Please ensure
+                            that at least one subset has empty MaxReplicas(no limitation)
+                            to avoid stuck scaling. Defaults to nil.
+                          x-kubernetes-int-or-string: true
+                        minReplicas:
+                          anyOf:
+                          - type: integer
+                          - type: string
+                          description: Indicates the lower bounded replicas of the
+                            subset. MinReplicas must be more than or equal to 0. Spec.Replicas
+                            must be more than or equal the sum of MinReplicas of all
+                            subsets. Defaults to 0.
+                          x-kubernetes-int-or-string: true
                         name:
                           description: Indicates subset name as a DNS_LABEL, which
                             will be used to generate subset workload name prefix in
@@ -1072,7 +1091,8 @@ spec:
                             pods will be distributed under this subset. If nil, the
                             number of replicas in this subset is determined by controller.
                             Controller will try to keep all the subsets with nil replicas
-                            have average pods.
+                            have average pods. Replicas and MinReplicas/MaxReplicas
+                            are mutually exclusive in a UnitedDeployment.
                           x-kubernetes-int-or-string: true
                         tolerations:
                           description: Indicates the tolerations the pods under this
@@ -1120,6 +1140,7 @@ spec:
                             type: object
                           type: array
                       required:
+                      - minReplicas
                       - name
                       type: object
                     type: array