feat: Add Workstation controller and mockgcp

apis/workstations/v1alpha1/config_identity.go

@@ -23,8 +23,7 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/client"
 )
 
-// WorkstationConfigIdentity defines the resource reference to WorkstationConfig, which "External" field
-// holds the GCP identifier for the KRM object.
+// WorkstationConfigIdentity defines the resource reference to WorkstationConfig.
 type WorkstationConfigIdentity struct {
 	parent *WorkstationConfigParent
 	id     string

apis/workstations/v1alpha1/workstation_identity.go

@@ -0,0 +1,141 @@
+// Copyright 2024 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package v1alpha1
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"github.com/GoogleCloudPlatform/k8s-config-connector/apis/common"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+)
+
+// WorkstationIdentity defines the resource reference to Workstation.
+type WorkstationIdentity struct {
+	parent *WorkstationParent
+	id     string
+}
+
+func (i *WorkstationIdentity) String() string {
+	return i.parent.String() + "/workstations/" + i.id
+}
+
+func (i *WorkstationIdentity) ID() string {
+	return i.id
+}
+
+func (i *WorkstationIdentity) Parent() *WorkstationParent {
+	return i.parent
+}
+
+type WorkstationParent struct {
+	ProjectID string
+	Location  string
+	Cluster   string
+	Config    string
+}
+
+func (p *WorkstationParent) String() string {
+	return "projects/" + p.ProjectID + "/locations/" + p.Location + "/workstationClusters/" + p.Cluster + "/workstationConfigs/" + p.Config
+}
+
+// New builds a WorkstationIdentity from the Config Connector Workstation object.
+func NewWorkstationIdentity(ctx context.Context, reader client.Reader, obj *Workstation) (*WorkstationIdentity, error) {
+	// Get Parent
+	configRef := obj.Spec.Parent
+	if configRef == nil {
+		return nil, fmt.Errorf("no parent config")
+	}
+	configExternal, err := configRef.NormalizedExternal(ctx, reader, obj.Namespace)
+	if err != nil {
+		return nil, fmt.Errorf("cannot resolve config: %w", err)
+	}
+	configParent, config, err := ParseWorkstationConfigExternal(configExternal)
+	if err != nil {
+		return nil, fmt.Errorf("cannot parse external config: %w", err)
+	}
+	projectID := configParent.ProjectID
+	if projectID == "" {
+		return nil, fmt.Errorf("cannot resolve project")
+	}
+	location := configParent.Location
+	if location == "" {
+		return nil, fmt.Errorf("cannot resolve location")
+	}
+	cluster := configParent.Cluster
+	if cluster == "" {
+		return nil, fmt.Errorf("cannot resolve cluster")
+	}
+
+	// Get desired ID
+	resourceID := common.ValueOf(obj.Spec.ResourceID)
+	if resourceID == "" {
+		resourceID = obj.GetName()
+	}
+	if resourceID == "" {
+		return nil, fmt.Errorf("cannot resolve resource ID")
+	}
+
+	// Use approved External
+	externalRef := common.ValueOf(obj.Status.ExternalRef)
+	if externalRef != "" {
+		// Validate desired with actual
+		actualParent, actualResourceID, err := ParseWorkstationExternal(externalRef)
+		if err != nil {
+			return nil, err
+		}
+		if actualParent.ProjectID != projectID {
+			return nil, fmt.Errorf("spec.projectRef changed, expect %s, got %s", actualParent.ProjectID, projectID)
+		}
+		if actualParent.Location != location {
+			return nil, fmt.Errorf("spec.location changed, expect %s, got %s", actualParent.Location, location)
+		}
+		if actualParent.Cluster != cluster {
+			return nil, fmt.Errorf("spec.cluster changed, expect %s, got %s", actualParent.Cluster, cluster)
+		}
+		if actualParent.Config != config {
+			return nil, fmt.Errorf("spec.config changed, expect %s, got %s", actualParent.Config, config)
+		}
+		if actualResourceID != resourceID {
+			return nil, fmt.Errorf("cannot reset `metadata.name` or `spec.resourceID` to %s, since it has already assigned to %s",
+				resourceID, actualResourceID)
+		}
+	}
+	return &WorkstationIdentity{
+		parent: &WorkstationParent{
+			ProjectID: projectID,
+			Location:  location,
+			Cluster:   cluster,
+			Config:    config,
+		},
+		id: resourceID,
+	}, nil
+}
+
+func ParseWorkstationExternal(external string) (parent *WorkstationParent, resourceID string, err error) {
+	tokens := strings.Split(external, "/")
+	if len(tokens) != 10 || tokens[0] != "projects" || tokens[2] != "locations" || tokens[4] != "workstationClusters" || tokens[6] != "workstationConfigs" || tokens[8] != "workstations" {
+		return nil, "", fmt.Errorf("format of Workstation external=%q was not known (use projects/<projectID>/locations/<location>/workstationClusters/<workstationclusterID>/workstationConfigs/<workstationconfigID>/workstations/<workstationID>)", external)
+	}
+	parent = &WorkstationParent{
+		ProjectID: tokens[1],
+		Location:  tokens[3],
+		Cluster:   tokens[5],
+		Config:    tokens[7],
+	}
+	resourceID = tokens[9]
+	return parent, resourceID, nil
+}

apis/workstations/v1alpha1/workstation_reference.go

@@ -0,0 +1,83 @@
+// Copyright 2024 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package v1alpha1
+
+import (
+	"context"
+	"fmt"
+
+	refsv1beta1 "github.com/GoogleCloudPlatform/k8s-config-connector/apis/refs/v1beta1"
+	"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/k8s"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/types"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+)
+
+var _ refsv1beta1.ExternalNormalizer = &WorkstationRef{}
+
+// WorkstationRef defines the resource reference to Workstation, which "External" field
+// holds the GCP identifier for the KRM object.
+type WorkstationRef struct {
+	// A reference to an externally managed Workstation resource.
+	// Should be in the format "projects/<projectID>/locations/<location>/workstationClusters/<workstationclusterID>/workstationConfigs/<workstationconfigID>/workstations/<workstationID>".
+	External string `json:"external,omitempty"`
+
+	// The name of a Workstation resource.
+	Name string `json:"name,omitempty"`
+
+	// The namespace of a Workstation resource.
+	Namespace string `json:"namespace,omitempty"`
+}
+
+// NormalizedExternal provision the "External" value for other resource that depends on Workstation.
+// If the "External" is given in the other resource's spec.WorkstationRef, the given value will be used.
+// Otherwise, the "Name" and "Namespace" will be used to query the actual Workstation object from the cluster.
+func (r *WorkstationRef) NormalizedExternal(ctx context.Context, reader client.Reader, otherNamespace string) (string, error) {
+	if r.External != "" && r.Name != "" {
+		return "", fmt.Errorf("cannot specify both name and external on %s reference", WorkstationGVK.Kind)
+	}
+	// From given External
+	if r.External != "" {
+		if _, _, err := ParseWorkstationExternal(r.External); err != nil {
+			return "", err
+		}
+		return r.External, nil
+	}
+
+	// From the Config Connector object
+	if r.Namespace == "" {
+		r.Namespace = otherNamespace
+	}
+	key := types.NamespacedName{Name: r.Name, Namespace: r.Namespace}
+	u := &unstructured.Unstructured{}
+	u.SetGroupVersionKind(WorkstationGVK)
+	if err := reader.Get(ctx, key, u); err != nil {
+		if apierrors.IsNotFound(err) {
+			return "", k8s.NewReferenceNotFoundError(u.GroupVersionKind(), key)
+		}
+		return "", fmt.Errorf("reading referenced %s %s: %w", WorkstationGVK, key, err)
+	}
+	// Get external from status.externalRef. This is the most trustworthy place.
+	actualExternalRef, _, err := unstructured.NestedString(u.Object, "status", "externalRef")
+	if err != nil {
+		return "", fmt.Errorf("reading status.externalRef: %w", err)
+	}
+	if actualExternalRef == "" {
+		return "", k8s.NewReferenceNotReadyError(u.GroupVersionKind(), key)
+	}
+	r.External = actualExternalRef
+	return r.External, nil
+}