add support for cross-namespace sourceRef in ImageUpdateAutomation

ImageUpdateAutomation objects can now refer to GitRepository objects in other
namespaces. Implemented by switching sourceRef from a SourceReference to a
dependency.CrossNamespaceDependencyReference.

Signed-off-by: Sanskar Jaiswal <sanskar.jaiswal@weave.works>

api/v1beta1/imageupdateautomation_types.go

@@ -29,7 +29,7 @@ type ImageUpdateAutomationSpec struct {
 	// SourceRef refers to the resource giving access details
 	// to a git repository.
 	// +required
-	SourceRef SourceReference `json:"sourceRef"`
+	SourceRef CrossNamespaceSourceReference `json:"sourceRef"`
 	// GitSpec contains all the git-specific definitions. This is
 	// technically optional, but in practice mandatory until there are
 	// other kinds of source allowed.

api/v1beta1/reference.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2020 The Flux authors
+Copyright 2020, 2021 The Flux authors
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -16,20 +16,33 @@ limitations under the License.
 
 package v1beta1
 
-// SourceReference contains enough information to let you locate the
-// typed, referenced source object.
-type SourceReference struct {
-	// API version of the referent
+import "fmt"
+
+// CrossNamespaceSourceReference contains enough information to let you locate the
+// typed Kubernetes resource object at cluster level.
+type CrossNamespaceSourceReference struct {
+	// API version of the referent.
 	// +optional
 	APIVersion string `json:"apiVersion,omitempty"`
 
-	// Kind of the referent
+	// Kind of the referent.
 	// +kubebuilder:validation:Enum=GitRepository
 	// +kubebuilder:default=GitRepository
 	// +required
 	Kind string `json:"kind"`
 
-	// Name of the referent
+	// Name of the referent.
 	// +required
 	Name string `json:"name"`
+
+	// Namespace of the referent, defaults to the namespace of the Kubernetes resource object that contains the reference.
+	// +optional
+	Namespace string `json:"namespace,omitempty"`
+}
+
+func (s *CrossNamespaceSourceReference) String() string {
+	if s.Namespace != "" {
+		return fmt.Sprintf("%s/%s/%s", s.Kind, s.Namespace, s.Name)
+	}
+	return fmt.Sprintf("%s/%s", s.Kind, s.Name)
 }

api/v1beta1/zz_generated.deepcopy.go

@@ -62,6 +62,21 @@ func (in *CommitUser) DeepCopy() *CommitUser {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *CrossNamespaceSourceReference) DeepCopyInto(out *CrossNamespaceSourceReference) {
+	*out = *in
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new CrossNamespaceSourceReference.
+func (in *CrossNamespaceSourceReference) DeepCopy() *CrossNamespaceSourceReference {
+	if in == nil {
+		return nil
+	}
+	out := new(CrossNamespaceSourceReference)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *GitCheckoutSpec) DeepCopyInto(out *GitCheckoutSpec) {
 	*out = *in
@@ -252,21 +267,6 @@ func (in *SigningKey) DeepCopy() *SigningKey {
 	return out
 }
 
-// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
-func (in *SourceReference) DeepCopyInto(out *SourceReference) {
-	*out = *in
-}
-
-// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new SourceReference.
-func (in *SourceReference) DeepCopy() *SourceReference {
-	if in == nil {
-		return nil
-	}
-	out := new(SourceReference)
-	in.DeepCopyInto(out)
-	return out
-}
-
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *UpdateStrategy) DeepCopyInto(out *UpdateStrategy) {
 	*out = *in

config/crd/bases/image.toolkit.fluxcd.io_imageupdateautomations.yaml

@@ -645,16 +645,20 @@ spec:
                   to a git repository.
                 properties:
                   apiVersion:
-                    description: API version of the referent
+                    description: API version of the referent.
                     type: string
                   kind:
                     default: GitRepository
-                    description: Kind of the referent
+                    description: Kind of the referent.
                     enum:
                     - GitRepository
                     type: string
                   name:
-                    description: Name of the referent
+                    description: Name of the referent.
+                    type: string
+                  namespace:
+                    description: Namespace of the referent, defaults to the namespace
+                      of the Kubernetes resource object that contains the reference.
                     type: string
                 required:
                 - kind

controllers/imageupdateautomation_controller.go

@@ -162,22 +162,27 @@ func (r *ImageUpdateAutomationReconciler) Reconcile(ctx context.Context, req ctr
 	if kind := auto.Spec.SourceRef.Kind; kind != sourcev1.GitRepositoryKind {
 		return failWithError(fmt.Errorf("source kind %q not supported", kind))
 	}
+
 	gitSpec := auto.Spec.GitSpec
 	if gitSpec == nil {
 		return failWithError(fmt.Errorf("source kind %s neccessitates field .spec.git", sourcev1.GitRepositoryKind))
 	}
 
 	var origin sourcev1.GitRepository
+	gitRepoNamespace := req.Namespace
+	if auto.Spec.SourceRef.Namespace != "" {
+		gitRepoNamespace = auto.Spec.SourceRef.Namespace
+	}
 	originName := types.NamespacedName{
 		Name:      auto.Spec.SourceRef.Name,
-		Namespace: auto.GetNamespace(),
+		Namespace: gitRepoNamespace,
 	}
 	debuglog.Info("fetching git repository", "gitrepository", originName)
 
 	if err := r.Get(ctx, originName, &origin); err != nil {
 		if client.IgnoreNotFound(err) == nil {
 			imagev1.SetImageUpdateAutomationReadiness(&auto, metav1.ConditionFalse, imagev1.GitNotAvailableReason, "referenced git repository is missing")
-			log.Error(err, "referenced git repository does not exist")
+			log.Error(err, fmt.Sprintf("referenced git repository %s does not exist.", originName.String()))
 			if err := r.patchStatus(ctx, req, auto.Status); err != nil {
 				return ctrl.Result{Requeue: true}, err
 			}

controllers/update_test.go

@@ -238,9 +238,189 @@ Images:
 				},
 				Spec: imagev1.ImageUpdateAutomationSpec{
 					Interval: metav1.Duration{Duration: 2 * time.Hour}, // this is to ensure any subsequent run should be outside the scope of the testing
-					SourceRef: imagev1.SourceReference{
-						Kind: "GitRepository",
-						Name: gitRepoKey.Name,
+					SourceRef: imagev1.CrossNamespaceSourceReference{
+						Kind:      "GitRepository",
+						Name:      gitRepoKey.Name,
+						Namespace: gitRepoKey.Namespace,
+					},
+					GitSpec: &imagev1.GitSpec{
+						Checkout: &imagev1.GitCheckoutSpec{
+							Reference: sourcev1.GitRepositoryRef{
+								Branch: branch,
+							},
+						},
+						Commit: imagev1.CommitSpec{
+							MessageTemplate: commitTemplate,
+							Author: imagev1.CommitUser{
+								Name:  authorName,
+								Email: authorEmail,
+							},
+						},
+					},
+					Update: &imagev1.UpdateStrategy{
+						Strategy: imagev1.UpdateStrategySetters,
+					},
+				},
+			}
+			Expect(k8sClient.Create(context.Background(), updateBySetters)).To(Succeed())
+			// wait for a new commit to be made by the controller
+			waitForNewHead(localRepo, branch)
+		})
+
+		AfterEach(func() {
+			Expect(k8sClient.Delete(context.Background(), namespace)).To(Succeed())
+		})
+
+		It("formats the commit message as in the template", func() {
+			head, _ := localRepo.Head()
+			commit, err := localRepo.CommitObject(head.Hash())
+			Expect(err).ToNot(HaveOccurred())
+			Expect(commit.Message).To(Equal(commitMessage))
+		})
+
+		It("has the commit author as given", func() {
+			head, _ := localRepo.Head()
+			commit, err := localRepo.CommitObject(head.Hash())
+			Expect(err).ToNot(HaveOccurred())
+			Expect(commit.Author).NotTo(BeNil())
+			Expect(commit.Author.Name).To(Equal(authorName))
+			Expect(commit.Author.Email).To(Equal(authorEmail))
+		})
+	})
+
+	Context("ref cross-ns GitRepository", func() {
+		var (
+			localRepo     *git.Repository
+			commitMessage string
+		)
+
+		const (
+			authorName     = "Flux B Ot"
+			authorEmail    = "fluxbot@example.com"
+			commitTemplate = `Commit summary
+
+Automation: {{ .AutomationObject }}
+
+Files:
+{{ range $filename, $_ := .Updated.Files -}}
+- {{ $filename }}
+{{ end -}}
+
+Objects:
+{{ range $resource, $_ := .Updated.Objects -}}
+{{ if eq $resource.Kind "Deployment" -}}
+- {{ $resource.Kind | lower }} {{ $resource.Name | lower }}
+{{ else -}}
+- {{ $resource.Kind }} {{ $resource.Name }}
+{{ end -}}
+{{ end -}}
+
+Images:
+{{ range .Updated.Images -}}
+- {{.}} ({{.Policy.Name}})
+{{ end -}}
+`
+			commitMessageFmt = `Commit summary
+
+Automation: %s/update-test
+
+Files:
+- deploy.yaml
+Objects:
+- deployment test
+Images:
+- helloworld:v1.0.0 (%s)
+`
+		)
+
+		BeforeEach(func() {
+			Expect(initGitRepo(gitServer, "testdata/appconfig", branch, repositoryPath)).To(Succeed())
+			repoURL := gitServer.HTTPAddressWithCredentials() + repositoryPath
+			var err error
+			localRepo, err = git.Clone(memory.NewStorage(), memfs.New(), &git.CloneOptions{
+				URL:           repoURL,
+				RemoteName:    "origin",
+				ReferenceName: plumbing.NewBranchReferenceName(branch),
+			})
+			Expect(err).ToNot(HaveOccurred())
+
+			// A different namespace for the GitRepository.
+			gitRepoNamespace := &corev1.Namespace{}
+			gitRepoNamespace.Name = "cross-ns-git-repo" + randStringRunes(5)
+			Expect(k8sClient.Create(context.Background(), gitRepoNamespace)).To(Succeed())
+
+			gitRepoKey := types.NamespacedName{
+				Name:      "image-auto-" + randStringRunes(5),
+				Namespace: gitRepoNamespace.Name,
+			}
+			gitRepo := &sourcev1.GitRepository{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      gitRepoKey.Name,
+					Namespace: gitRepoKey.Namespace,
+				},
+				Spec: sourcev1.GitRepositorySpec{
+					URL:      repoURL,
+					Interval: metav1.Duration{Duration: time.Minute},
+				},
+			}
+			Expect(k8sClient.Create(context.Background(), gitRepo)).To(Succeed())
+			policyKey := types.NamespacedName{
+				Name:      "policy-" + randStringRunes(5),
+				Namespace: namespace.Name,
+			}
+			// NB not testing the image reflector controller; this
+			// will make a "fully formed" ImagePolicy object.
+			policy := &imagev1_reflect.ImagePolicy{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      policyKey.Name,
+					Namespace: policyKey.Namespace,
+				},
+				Spec: imagev1_reflect.ImagePolicySpec{
+					ImageRepositoryRef: meta.NamespacedObjectReference{
+						Name: "not-expected-to-exist",
+					},
+					Policy: imagev1_reflect.ImagePolicyChoice{
+						SemVer: &imagev1_reflect.SemVerPolicy{
+							Range: "1.x",
+						},
+					},
+				},
+			}
+			Expect(k8sClient.Create(context.Background(), policy)).To(Succeed())
+			policy.Status.LatestImage = "helloworld:v1.0.0"
+			Expect(k8sClient.Status().Update(context.Background(), policy)).To(Succeed())
+
+			// Format the expected message given the generated values
+			commitMessage = fmt.Sprintf(commitMessageFmt, namespace.Name, policyKey.Name)
+
+			// Insert a setter reference into the deployment file,
+			// before creating the automation object itself.
+			commitInRepo(repoURL, branch, "Install setter marker", func(tmp string) {
+				Expect(replaceMarker(tmp, policyKey)).To(Succeed())
+			})
+
+			// pull the head commit we just pushed, so it's not
+			// considered a new commit when checking for a commit
+			// made by automation.
+			waitForNewHead(localRepo, branch)
+
+			// now create the automation object, and let it (one
+			// hopes!) make a commit itself.
+			updateKey := types.NamespacedName{
+				Namespace: namespace.Name,
+				Name:      "update-test",
+			}
+			updateBySetters := &imagev1.ImageUpdateAutomation{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      updateKey.Name,
+					Namespace: updateKey.Namespace,
+				},
+				Spec: imagev1.ImageUpdateAutomationSpec{
+					Interval: metav1.Duration{Duration: 2 * time.Hour}, // this is to ensure any subsequent run should be outside the scope of the testing
+					SourceRef: imagev1.CrossNamespaceSourceReference{
+						Kind:      "GitRepository",
+						Name:      gitRepoKey.Name,
+						Namespace: gitRepoKey.Namespace,
 					},
 					GitSpec: &imagev1.GitSpec{
 						Checkout: &imagev1.GitCheckoutSpec{
@@ -380,9 +560,10 @@ Images:
 						Strategy: imagev1.UpdateStrategySetters,
 						Path:     "./yes",
 					},
-					SourceRef: imagev1.SourceReference{
-						Kind: "GitRepository",
-						Name: gitRepoKey.Name,
+					SourceRef: imagev1.CrossNamespaceSourceReference{
+						Kind:      "GitRepository",
+						Name:      gitRepoKey.Name,
+						Namespace: gitRepoKey.Namespace,
 					},
 					GitSpec: &imagev1.GitSpec{
 						Checkout: &imagev1.GitCheckoutSpec{
@@ -524,9 +705,10 @@ Images:
 					Namespace: updateKey.Namespace,
 				},
 				Spec: imagev1.ImageUpdateAutomationSpec{
-					SourceRef: imagev1.SourceReference{
-						Kind: "GitRepository",
-						Name: gitRepoKey.Name,
+					SourceRef: imagev1.CrossNamespaceSourceReference{
+						Kind:      "GitRepository",
+						Name:      gitRepoKey.Name,
+						Namespace: gitRepoKey.Namespace,
 					},
 					Interval: metav1.Duration{Duration: 2 * time.Hour}, // this is to ensure any subsequent run should be outside the scope of the testing
 					GitSpec: &imagev1.GitSpec{
@@ -720,9 +902,10 @@ Images:
 
 					update = &imagev1.ImageUpdateAutomation{
 						Spec: imagev1.ImageUpdateAutomationSpec{
-							SourceRef: imagev1.SourceReference{
-								Kind: "GitRepository",
-								Name: gitRepoKey.Name,
+							SourceRef: imagev1.CrossNamespaceSourceReference{
+								Kind:      "GitRepository",
+								Name:      gitRepoKey.Name,
+								Namespace: gitRepoKey.Namespace,
 							},
 							Update: &imagev1.UpdateStrategy{
 								Strategy: imagev1.UpdateStrategySetters,
@@ -838,9 +1021,10 @@ Images:
 						},
 						Spec: imagev1.ImageUpdateAutomationSpec{
 							Interval: metav1.Duration{Duration: 2 * time.Hour}, // this is to ensure any subsequent run should be outside the scope of the testing
-							SourceRef: imagev1.SourceReference{
-								Kind: "GitRepository",
-								Name: gitRepoKey.Name,
+							SourceRef: imagev1.CrossNamespaceSourceReference{
+								Kind:      "GitRepository",
+								Name:      gitRepoKey.Name,
+								Namespace: gitRepoKey.Namespace,
 							},
 							Update: &imagev1.UpdateStrategy{
 								Strategy: imagev1.UpdateStrategySetters,
@@ -960,9 +1144,10 @@ Images:
 					Namespace: key.Namespace,
 				},
 				Spec: imagev1.ImageUpdateAutomationSpec{
-					SourceRef: imagev1.SourceReference{
-						Kind: "GitRepository",
-						Name: "garbage",
+					SourceRef: imagev1.CrossNamespaceSourceReference{
+						Kind:      "GitRepository",
+						Name:      "garbage",
+						Namespace: key.Namespace,
 					},
 					Interval: metav1.Duration{Duration: 2 * time.Hour}, // this is to ensure any subsequent run should be outside the scope of the testing
 					GitSpec: &imagev1.GitSpec{

docs/api/image-automation.md

@@ -119,6 +119,74 @@ string
 </table>
 </div>
 </div>
+<h3 id="image.toolkit.fluxcd.io/v1beta1.CrossNamespaceSourceReference">CrossNamespaceSourceReference
+</h3>
+<p>
+(<em>Appears on:</em>
+<a href="#image.toolkit.fluxcd.io/v1beta1.ImageUpdateAutomationSpec">ImageUpdateAutomationSpec</a>)
+</p>
+<p>CrossNamespaceSourceReference contains enough information to let you locate the
+typed Kubernetes resource object at cluster level.</p>
+<div class="md-typeset__scrollwrap">
+<div class="md-typeset__table">
+<table>
+<thead>
+<tr>
+<th>Field</th>
+<th>Description</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td>
+<code>apiVersion</code><br>
+<em>
+string
+</em>
+</td>
+<td>
+<em>(Optional)</em>
+<p>API version of the referent.</p>
+</td>
+</tr>
+<tr>
+<td>
+<code>kind</code><br>
+<em>
+string
+</em>
+</td>
+<td>
+<p>Kind of the referent.</p>
+</td>
+</tr>
+<tr>
+<td>
+<code>name</code><br>
+<em>
+string
+</em>
+</td>
+<td>
+<p>Name of the referent.</p>
+</td>
+</tr>
+<tr>
+<td>
+<code>namespace</code><br>
+<em>
+string
+</em>
+</td>
+<td>
+<em>(Optional)</em>
+<p>Namespace of the referent, defaults to the namespace of the Kubernetes resource object that contains the reference.</p>
+</td>
+</tr>
+</tbody>
+</table>
+</div>
+</div>
 <h3 id="image.toolkit.fluxcd.io/v1beta1.GitCheckoutSpec">GitCheckoutSpec
 </h3>
 <p>
@@ -262,8 +330,8 @@ ImageUpdateAutomationSpec
 <td>
 <code>sourceRef</code><br>
 <em>
-<a href="#image.toolkit.fluxcd.io/v1beta1.SourceReference">
-SourceReference
+<a href="#image.toolkit.fluxcd.io/v1beta1.CrossNamespaceSourceReference">
+CrossNamespaceSourceReference
 </a>
 </em>
 </td>
@@ -370,8 +438,8 @@ ImageUpdateAutomationStatus
 <td>
 <code>sourceRef</code><br>
 <em>
-<a href="#image.toolkit.fluxcd.io/v1beta1.SourceReference">
-SourceReference
+<a href="#image.toolkit.fluxcd.io/v1beta1.CrossNamespaceSourceReference">
+CrossNamespaceSourceReference
 </a>
 </em>
 </td>
@@ -616,62 +684,6 @@ ImageUpdateAutomation.</p>
 </table>
 </div>
 </div>
-<h3 id="image.toolkit.fluxcd.io/v1beta1.SourceReference">SourceReference
-</h3>
-<p>
-(<em>Appears on:</em>
-<a href="#image.toolkit.fluxcd.io/v1beta1.ImageUpdateAutomationSpec">ImageUpdateAutomationSpec</a>)
-</p>
-<p>SourceReference contains enough information to let you locate the
-typed, referenced source object.</p>
-<div class="md-typeset__scrollwrap">
-<div class="md-typeset__table">
-<table>
-<thead>
-<tr>
-<th>Field</th>
-<th>Description</th>
-</tr>
-</thead>
-<tbody>
-<tr>
-<td>
-<code>apiVersion</code><br>
-<em>
-string
-</em>
-</td>
-<td>
-<em>(Optional)</em>
-<p>API version of the referent</p>
-</td>
-</tr>
-<tr>
-<td>
-<code>kind</code><br>
-<em>
-string
-</em>
-</td>
-<td>
-<p>Kind of the referent</p>
-</td>
-</tr>
-<tr>
-<td>
-<code>name</code><br>
-<em>
-string
-</em>
-</td>
-<td>
-<p>Name of the referent</p>
-</td>
-</tr>
-</tbody>
-</table>
-</div>
-</div>
 <h3 id="image.toolkit.fluxcd.io/v1beta1.UpdateStrategy">UpdateStrategy
 </h3>
 <p>