feat: imagePullSecret functionality

manifests/postgresql.crd.yaml

@@ -136,6 +136,16 @@ spec:
               connectionPooler:
                 type: object
                 properties:
+                  imagePullSecrets:
+                    type: array
+                    nullable: true
+                    items:
+                      type: object
+                      required:
+                        - name
+                      properties:
+                        name:
+                          type: string
                   dockerImage:
                     type: string
                   maxDBConnections:

pkg/apis/acid.zalan.do/v1/postgresql_type.go

@@ -242,12 +242,13 @@ type PostgresStatus struct {
 // makes sense to expose. E.g. pool size (min/max boundaries), max client
 // connections etc.
 type ConnectionPooler struct {
-	NumberOfInstances *int32 `json:"numberOfInstances,omitempty"`
-	Schema            string `json:"schema,omitempty"`
-	User              string `json:"user,omitempty"`
-	Mode              string `json:"mode,omitempty"`
-	DockerImage       string `json:"dockerImage,omitempty"`
-	MaxDBConnections  *int32 `json:"maxDBConnections,omitempty"`
+	NumberOfInstances *int32                    `json:"numberOfInstances,omitempty"`
+	Schema            string                    `json:"schema,omitempty"`
+	User              string                    `json:"user,omitempty"`
+	Mode              string                    `json:"mode,omitempty"`
+	DockerImage       string                    `json:"dockerImage,omitempty"`
+	MaxDBConnections  *int32                    `json:"maxDBConnections,omitempty"`
+	ImagePullSecrets  []v1.LocalObjectReference `json:"imagePullSecrets,omitempty"`
 
 	*Resources `json:"resources,omitempty"`
 }

pkg/cluster/connection_pooler.go

@@ -412,6 +412,10 @@ func (c *Cluster) generateConnectionPoolerPodTemplate(role PostgresRole) (
 		},
 	}
 
+	if len(connectionPoolerSpec.ImagePullSecrets) > 0 {
+		podTemplate.Spec.ImagePullSecrets = connectionPoolerSpec.ImagePullSecrets
+	}
+
 	nodeAffinity := c.nodeAffinity(c.OpConfig.NodeReadinessLabel, spec.NodeAffinity)
 	if c.OpConfig.EnablePodAntiAffinity {
 		labelsSet := labels.Set(c.connectionPoolerLabels(role, false).MatchLabels)