add celSelector in placement (#365)

Signed-off-by: Qing Hao <[email protected]>

Author: haoqing0110

cluster/v1beta1/0000_02_clusters.open-cluster-management.io_placements.crd.yaml

@@ -121,6 +121,16 @@ spec:
                               description: LabelSelector to select clusters subset
                                 by label.
                               properties:
+                                celSelector:
+                                  description: CelSelector represents a selector of
+                                    ManagedClusters by CEL expressions on ManagedCluster
+                                    fields
+                                  properties:
+                                    celExpressions:
+                                      items:
+                                        type: string
+                                      type: array
+                                  type: object
                                 claimSelector:
                                   description: ClaimSelector represents a selector
                                     of ManagedClusters by clusterClaims in status
@@ -251,6 +261,15 @@ spec:
                         3) If a ManagedCluster (not selected previously) starts to match the selector, it will either
                            be selected or at least has a chance to be selected (when NumberOfClusters is specified);
                       properties:
+                        celSelector:
+                          description: CelSelector represents a selector of ManagedClusters
+                            by CEL expressions on ManagedCluster fields
+                          properties:
+                            celExpressions:
+                              items:
+                                type: string
+                              type: array
+                          type: object
                         claimSelector:
                           description: ClaimSelector represents a selector of ManagedClusters
                             by clusterClaims in status

cluster/v1beta1/types_placement.go

@@ -173,6 +173,16 @@ type ClusterSelector struct {
 	// ClaimSelector represents a selector of ManagedClusters by clusterClaims in status
 	// +optional
 	ClaimSelector ClusterClaimSelector `json:"claimSelector,omitempty"`
+
+	// CelSelector represents a selector of ManagedClusters by CEL expressions on ManagedCluster fields
+	// +optional
+	CelSelector ClusterCelSelector `json:"celSelector,omitempty"`
+}
+
+// ClusterCelSelector is a list of CEL expressions. The expressions are ANDed.
+type ClusterCelSelector struct {
+	// +optional
+	CelExpressions []string `json:"celExpressions,omitempty"`
 }
 
 // ClusterClaimSelector is a claim query over a set of ManagedClusters. An empty cluster claim