Add Topology Spread Constraints support

bundle/manifests/rc.app.stacks_runtimecomponents.yaml

@@ -3455,6 +3455,56 @@ spec:
                         type: string
                     type: object
                 type: object
+              topologySpreadConstraints:
+                items:
+                  description: TopologySpreadConstraint specifies how to spread matching pods among the given topology.
+                  properties:
+                    labelSelector:
+                      description: LabelSelector is used to find matching pods. Pods that match this label selector are counted to determine the number of pods in their corresponding topology domain.
+                      properties:
+                        matchExpressions:
+                          description: matchExpressions is a list of label selector requirements. The requirements are ANDed.
+                          items:
+                            description: A label selector requirement is a selector that contains values, a key, and an operator that relates the key and values.
+                            properties:
+                              key:
+                                description: key is the label key that the selector applies to.
+                                type: string
+                              operator:
+                                description: operator represents a key's relationship to a set of values. Valid operators are In, NotIn, Exists and DoesNotExist.
+                                type: string
+                              values:
+                                description: values is an array of string values. If the operator is In or NotIn, the values array must be non-empty. If the operator is Exists or DoesNotExist, the values array must be empty. This array is replaced during a strategic merge patch.
+                                items:
+                                  type: string
+                                type: array
+                            required:
+                            - key
+                            - operator
+                            type: object
+                          type: array
+                        matchLabels:
+                          additionalProperties:
+                            type: string
+                          description: matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels map is equivalent to an element of matchExpressions, whose key field is "key", the operator is "In", and the values array contains only "value". The requirements are ANDed.
+                          type: object
+                      type: object
+                    maxSkew:
+                      description: 'MaxSkew describes the degree to which pods may be unevenly distributed. When `whenUnsatisfiable=DoNotSchedule`, it is the maximum permitted difference between the number of matching pods in the target topology and the global minimum. For example, in a 3-zone cluster, MaxSkew is set to 1, and pods with the same labelSelector spread as 1/1/0: | zone1 | zone2 | zone3 | |   P   |   P   |       | - if MaxSkew is 1, incoming pod can only be scheduled to zone3 to become 1/1/1; scheduling it onto zone1(zone2) would make the ActualSkew(2-0) on zone1(zone2) violate MaxSkew(1). - if MaxSkew is 2, incoming pod can be scheduled onto any zone. When `whenUnsatisfiable=ScheduleAnyway`, it is used to give higher precedence to topologies that satisfy it. It''s a required field. Default value is 1 and 0 is not allowed.'
+                      format: int32
+                      type: integer
+                    topologyKey:
+                      description: TopologyKey is the key of node labels. Nodes that have a label with this key and identical values are considered to be in the same topology. We consider each <key, value> as a "bucket", and try to put balanced number of pods into each bucket. It's a required field.
+                      type: string
+                    whenUnsatisfiable:
+                      description: 'WhenUnsatisfiable indicates how to deal with a pod if it doesn''t satisfy the spread constraint. - DoNotSchedule (default) tells the scheduler not to schedule it. - ScheduleAnyway tells the scheduler to schedule the pod in any location,   but giving higher precedence to topologies that would help reduce the   skew. A constraint is considered "Unsatisfiable" for an incoming pod if and only if every possible node assignment for that pod would violate "MaxSkew" on some topology. For example, in a 3-zone cluster, MaxSkew is set to 1, and pods with the same labelSelector spread as 3/1/1: | zone1 | zone2 | zone3 | | P P P |   P   |   P   | If WhenUnsatisfiable is set to DoNotSchedule, incoming pod can only be scheduled to zone2(zone3) to become 3/2/1(3/1/2) as ActualSkew(2-1) on zone2(zone3) satisfies MaxSkew(1). In other words, the cluster can still be imbalanced, but scheduler won''t make it *more* imbalanced. It''s a required field.'
+                      type: string
+                  required:
+                  - maxSkew
+                  - topologyKey
+                  - whenUnsatisfiable
+                  type: object
+                type: array
               volumeMounts:
                 description: Represents where to mount the volumes into the application container.
                 items: