feat: 初始化 controller 状态机

internal/controller/postgresqlinstance_controller.go

@@ -18,7 +18,9 @@ package controller
 
 import (
 	"context"
+	"reflect"
 
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/runtime"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/client"
@@ -47,9 +49,30 @@ type PostgreSQLInstanceReconciler struct {
 // For more details, check Reconcile and its Result here:
 // - https://pkg.go.dev/sigs.k8s.io/[email protected]/pkg/reconcile
 func (r *PostgreSQLInstanceReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
-	_ = logf.FromContext(ctx)
+	logger := logf.FromContext(ctx)
+	instance := &databasev1alpha1.PostgreSQLInstance{}
+	if err := r.Get(ctx, req.NamespacedName, instance); err != nil {
+		return ctrl.Result{}, client.IgnoreNotFound(err)
+	}
 
-	// TODO(user): your logic here
+	before := instance.DeepCopy()
+
+	if !instance.DeletionTimestamp.IsZero() {
+		instance.Status.Phase = databasev1alpha1.PostgreSQLInstancePhaseDeleting
+		setReconcilingCondition(&instance.Status.Conditions, instance.Generation, "instance deletion is reconciling")
+	} else if instance.Status.Phase == "" {
+		instance.Status.Phase = databasev1alpha1.PostgreSQLInstancePhaseValidating
+		setReconcilingCondition(&instance.Status.Conditions, instance.Generation, "instance dependencies are being validated")
+	}
+
+	if !reflect.DeepEqual(before.Status, instance.Status) {
+		if err := r.Status().Patch(ctx, instance, client.MergeFrom(before)); err != nil {
+			if apierrors.IsConflict(err) {
+				logger.V(1).Info("instance status changed concurrently; retrying")
+			}
+			return ctrl.Result{}, err
+		}
+	}
 
 	return ctrl.Result{}, nil
 }