chore(deps): update docker/login-action action to v4.2.0 (#16)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [docker/login-action](https://github.com/docker/login-action) | action | minor | `v4.1.0` → `v4.2.0` |

---

### Release Notes

<details>
<summary>docker/login-action (docker/login-action)</summary>

### [`v4.2.0`](https://github.com/docker/login-action/releases/tag/v4.2.0)

[Compare Source](https://github.com/docker/login-action/compare/v4.1.0...v4.2.0)

- Bump [@&#8203;actions/core](https://github.com/actions/core) from 3.0.0 to 3.0.1 in [#&#8203;976](https://github.com/docker/login-action/pull/976)
- Bump [@&#8203;aws-sdk/client-ecr](https://github.com/aws-sdk/client-ecr) and [@&#8203;aws-sdk/client-ecr-public](https://github.com/aws-sdk/client-ecr-public) to 3.1050.0 in [#&#8203;960](https://github.com/docker/login-action/pull/960)
- Bump [@&#8203;docker/actions-toolkit](https://github.com/docker/actions-toolkit) from 0.86.0 to 0.90.0 in [#&#8203;970](https://github.com/docker/login-action/pull/970)
- Bump brace-expansion from 2.0.1 to 5.0.6 in [#&#8203;993](https://github.com/docker/login-action/pull/993)
- Bump fast-xml-builder from 1.1.4 to 1.2.0 in [#&#8203;985](https://github.com/docker/login-action/pull/985)
- Bump fast-xml-parser from 5.3.6 to 5.8.0 in [#&#8203;963](https://github.com/docker/login-action/pull/963)
- Bump http-proxy-agent and https-proxy-agent to 9.0.0 in [#&#8203;961](https://github.com/docker/login-action/pull/961)
- Bump postcss from 8.5.6 to 8.5.10 in [#&#8203;979](https://github.com/docker/login-action/pull/979)
- Bump tar from 6.2.1 to 7.5.15 in [#&#8203;991](https://github.com/docker/login-action/pull/991)
- Bump vite from 7.3.1 to 7.3.3 in [#&#8203;986](https://github.com/docker/login-action/pull/986)

**Full Changelog**: <https://github.com/docker/login-action/compare/v4.1.0...v4.2.0>

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My41LjQiLCJ1cGRhdGVkSW5WZXIiOiI0My41LjQiLCJ0YXJnZXRCcmFuY2giOiJtYWluIiwibGFiZWxzIjpbImFjdGlvbiIsImRlcHMiXX0=-->

Reviewed-on: #16
Reviewed-by: t.behrendt <2+t.behrendt@noreply.localhost>
Co-authored-by: Renovate Bot <renovate@t00n.de>
Co-committed-by: Renovate Bot <renovate@t00n.de>

.dockerignore

@@ -1,6 +1,7 @@
 *
 
 !pkg
+!internal
 !controller.go
 !main.go
 !go.mod

.gitea/workflows/cd.yaml

@@ -28,9 +28,9 @@ jobs:
       - name: Checkout
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0
+        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
       - name: Login to Registry
-        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4.1.0
+        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4.2.0
         with:
           registry: ${{ env.DOCKER_REGISTRY }}
           username: ${{ secrets.REGISTRY_USER }}
@@ -41,7 +41,7 @@ jobs:
           echo REPO_NAME=$(echo ${GITHUB_REPOSITORY} | awk -F"/" '{print $2}' | tr '[:upper:]' '[:lower:]') >> $GITHUB_OUTPUT
           echo REPO_VERSION=$(git describe --tags --always | sed 's/^v//') >> $GITHUB_OUTPUT
       - name: Build and push
-        uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f # v7.1.0
+        uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7.2.0
         with:
           context: .
           file: ./Dockerfile
@@ -90,7 +90,7 @@ jobs:
           echo REPO_VERSION=$(git describe --tags --always | sed 's/^v//') >> $GITHUB_OUTPUT
 
       - name: Login to Registry
-        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4.1.0
+        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4.2.0
         with:
           registry: ${{ env.DOCKER_REGISTRY }}
           username: ${{ secrets.REGISTRY_USER }}

Makefile

@@ -20,7 +20,7 @@ codegen:
 test: test-unit test-coverage
 
 test-unit:
-	go test . -coverprofile=coverage.out
+	go test ./... -coverprofile=coverage.out
 
 test-coverage:
 	go tool gcov2lcov -infile coverage.out > lcov.info

README.md

@@ -34,9 +34,11 @@ spec:
   invalidation_flow: 7acac1ef-19e3-4a6f-8d8d-14ca7031d184
   # The external host of your application.
   external_host: https://example.t00n.de
+  # The ID of the outpost, which at current point in time can only be retrieved from Authentik directly. In this example: "Proxy-Forward-Auth-Auto"
+  outpost: e004ffe7-4af6-4ac1-9e9d-522354799e1f
 ```
 
-The ProxyProvider will be created in Authentik, but will not be assigned to an outpost or an application (Resources are TBD).
+The ProxyProvider will be created in Authentik and assigned to the configured outpost.
 
 ### Application
 

artifacts/crd/proxyProvider.yaml

@@ -16,6 +16,9 @@ spec:
         - name: PK
           type: string
           jsonPath: .status.pk
+        - name: Outpost
+          type: string
+          jsonPath: .spec.outpost
       schema:
         openAPIV3Schema:
           type: object
@@ -31,11 +34,15 @@ spec:
                   type: string
                 external_host:
                   type: string
+                outpost:
+                  type: string
+                  format: uuid
               required:
                 - name
                 - authorization_flow
                 - invalidation_flow
                 - external_host
+                - outpost
             status:
               type: object
               properties:

artifacts/examples/proxyProvider.yaml

@@ -9,3 +9,4 @@ spec:
   authorization_flow: 16896c6d-b326-42d1-8d3f-93f32921962e
   invalidation_flow: 7acac1ef-19e3-4a6f-8d8d-14ca7031d184
   external_host: https://example.t00n.de
+  outpost: ce8f74c0-88cd-47fe-96f5-d6507b739ceb

go.mod

@@ -7,9 +7,9 @@ godebug default=go1.26
 require (
 	goauthentik.io/api/v3 v3.2026020.16
 	golang.org/x/time v0.15.0
-	k8s.io/api v0.36.0
+	k8s.io/api v0.36.1
-	k8s.io/apimachinery v0.36.0
+	k8s.io/apimachinery v0.36.1
-	k8s.io/client-go v0.36.0
+	k8s.io/client-go v0.36.1
 	k8s.io/klog/v2 v2.140.0
 	k8s.io/kube-openapi v0.0.0-20260511211612-da4e56fe5676
 	sigs.k8s.io/structured-merge-diff/v6 v6.4.0

go.sum

@@ -123,14 +123,20 @@ k8s.io/api v0.0.0-20260509204538-0dfb117cc6ec h1:xf12Yh3ltN4fnNyP0CyyM0TwNVnZDfL
 k8s.io/api v0.0.0-20260509204538-0dfb117cc6ec/go.mod h1:C+fcNlNQ9TcKHspN+DD7UybdfnjDAGyBjfCd6W7ogbY=
 k8s.io/api v0.36.0 h1:SgqDhZzHdOtMk40xVSvCXkP9ME0H05hPM3p9AB1kL80=
 k8s.io/api v0.36.0/go.mod h1:m1LVrGPNYax5NBHdO+QuAedXyuzTt4RryI/qnmNvs34=
+k8s.io/api v0.36.1 h1:XbL/EMj8K2aJpJtePmqUyQMsM0D4QI2pvl7YKJ20FTY=
+k8s.io/api v0.36.1/go.mod h1:KOWo4ey3TINlXjeHVuwB3i+tXXnu+UcwFBHlI/9dvEo=
 k8s.io/apimachinery v0.0.0-20260513183604-f9371b815e42 h1:rWdGOTor3z0WSyZcRl9ms4dn9Cw9CqmNBqXuf2z0k1k=
 k8s.io/apimachinery v0.0.0-20260513183604-f9371b815e42/go.mod h1:hiubQ6UTHIdr0bS8ExXOJEywFVOoudnldm/l/NiNVlA=
 k8s.io/apimachinery v0.36.0 h1:jZyPzhd5Z+3h9vJLt0z9XdzW9VzNzWAUw+P1xZ9PXtQ=
 k8s.io/apimachinery v0.36.0/go.mod h1:FklypaRJt6n5wUIwWXIP6GJlIpUizTgfo1T/As+Tyxc=
+k8s.io/apimachinery v0.36.1 h1:G63Gjx2W+q0YD+72Vo8oY0nDnePVwnuzTmmy5ENrVSA=
+k8s.io/apimachinery v0.36.1/go.mod h1:ibYOR00vW/I1kzvi5SF0dRuJ52BvKtfvRdOn35GPQ+8=
 k8s.io/client-go v0.0.0-20260509205101-ca52b81a2940 h1:n5t5Jx3VpLdiAGxIvIHsZDmsExtZVwghUPLM3wFi6Go=
 k8s.io/client-go v0.0.0-20260509205101-ca52b81a2940/go.mod h1:0e7OLwg7kdXISVFwn7ishFdvxfVgi7wsqHqsQPHl61w=
 k8s.io/client-go v0.36.0 h1:pOYi7C4RHChYjMiHpZSpSbIM6ZxVbRXBy7CuiIwqA3c=
 k8s.io/client-go v0.36.0/go.mod h1:ZKKcpwF0aLYfkHFCjillCKaTK/yBkEDHTDXCFY6AS9Y=
+k8s.io/client-go v0.36.1 h1:FN/K8QIT2CEDt+2WB2HnWrUANZ50AP5GII43/SP2JR0=
+k8s.io/client-go v0.36.1/go.mod h1:s6rAnCtTGYDQnpNjEhSaISV+2O8jwruZ6m3QOYBFbtU=
 k8s.io/klog/v2 v2.140.0 h1:Tf+J3AH7xnUzZyVVXhTgGhEKnFqye14aadWv7bzXdzc=
 k8s.io/klog/v2 v2.140.0/go.mod h1:o+/RWfJ6PwpnFn7OyAG3QnO47BFsymfEfrz6XyYSSp0=
 k8s.io/kube-openapi v0.0.0-20260511211612-da4e56fe5676 h1:ahjrVu/DBcaAhw/GcblfaOvvQ2wi8kqXWvn62nud3UU=

internal/baseController/controller.go

@@ -1,4 +1,4 @@
-package controllers
+package baseController
 
 import (
 	"context"

internal/baseController/controller_test.go

@@ -1,5 +1,5 @@
 // AI generated tests and not yet reviewed.
-package controllers
+package baseController
 
 import (
 	"context"

pkg/apis/proxyprovider/v1alpha1/types.go

@@ -37,6 +37,7 @@ type ProxyProviderSpec struct {
 	AuthorizationFlow string `json:"authorization_flow"`
 	InvalidationFlow  string `json:"invalidation_flow"`
 	ExternalHost      string `json:"external_host"`
+	Outpost           string `json:"outpost"`
 }
 
 type ProxyProviderStatus struct {

pkg/controllers/application/controller.go

@@ -37,8 +37,8 @@ import (
 	"k8s.io/client-go/util/workqueue"
 	"k8s.io/klog/v2"
 
+	"gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/internal/baseController"
 	v1alpha1 "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/apis/application/v1alpha1"
-	controllers "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/controllers"
 	clientset "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/generated/clientset/versioned"
 	operatorscheme "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/generated/clientset/versioned/scheme"
 	informers "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/generated/informers/externalversions/application/v1alpha1"
@@ -68,7 +68,7 @@ type ApplicationController struct {
 
 	applicationListener listers.ApplicationLister
 
-	controller *controllers.Controller
+	controller *baseController.Controller
 }
 
 func NewController(
@@ -98,7 +98,7 @@ func NewController(
 		authentik:            authentik,
 		applicationListener:  applicationInformer.Lister(),
 	}
-	c.controller = controllers.NewController(
+	c.controller = baseController.NewController(
 		ctx,
 		workqueue.NewTypedRateLimitingQueue(ratelimiter),
 		recorder,
@@ -160,7 +160,7 @@ func (c *ApplicationController) ensureFinalizers(ctx context.Context, app *v1alp
 }
 
 func (c *ApplicationController) reconcileDelete(ctx context.Context, app *v1alpha1.Application) error {
-	r, err := c.authentik.CoreApi.CoreApplicationsDestroy(ctx, app.Status.PK).Execute()
+	r, err := c.authentik.CoreApi.CoreApplicationsDestroy(ctx, app.Spec.Slug).Execute()
 	if err != nil {
 		// This handles an edge-case, where when the Application on Authentik has already been deleted, but the finalizer is still present. We just remove the finalizer and return.
 		if r != nil && r.StatusCode != http.StatusNotFound {

pkg/controllers/application/controller_test.go

@@ -130,7 +130,7 @@ func TestController_syncHandler_delete(t *testing.T) {
 
 	var destroyCalled bool
 	server := newAuthentikTestServer(t, authentikTestHandlers{
-		proxyDestroy: func(w http.ResponseWriter, r *http.Request) {
+		applicationDestroy: func(w http.ResponseWriter, r *http.Request) {
 			destroyCalled = true
 			if r.Method != http.MethodDelete {
 				t.Errorf("destroy method = %s, want DELETE", r.Method)
@@ -165,7 +165,7 @@ func TestController_syncHandler_delete_providerAlreadyGone(t *testing.T) {
 	app.Finalizers = []string{DeleteAuthentikApplicationFinalizer}
 
 	server := newAuthentikTestServer(t, authentikTestHandlers{
-		proxyDestroy: func(w http.ResponseWriter, _ *http.Request) {
+		applicationDestroy: func(w http.ResponseWriter, _ *http.Request) {
 			http.NotFound(w, nil)
 		},
 	})
@@ -198,25 +198,31 @@ func TestController_syncHandler_notFound(t *testing.T) {
 	}
 }
 
-func TestController_syncHandler_invalidPK(t *testing.T) {
+func TestController_syncHandler_delete_usesSlugNotPK(t *testing.T) {
 	now := metav1.Now()
 	app := testApplication()
 	app.Status.PK = "not-a-number"
 	app.DeletionTimestamp = &now
 	app.Finalizers = []string{DeleteAuthentikApplicationFinalizer}
 
-	server := newAuthentikTestServer(t, authentikTestHandlers{})
+	var destroySlug string
+	server := newAuthentikTestServer(t, authentikTestHandlers{
+		applicationDestroy: func(w http.ResponseWriter, r *http.Request) {
+			destroySlug = strings.TrimSuffix(strings.TrimPrefix(r.URL.Path, "/api/v3/core/applications/"), "/")
+			w.WriteHeader(http.StatusNoContent)
+		},
+	})
 	t.Cleanup(server.Close)
 
 	ctrl, ctx, cancel := newTestController(t, app, server.URL)
 	t.Cleanup(cancel)
 
 	err := ctrl.syncHandler(ctx, cache.ObjectName{Namespace: app.Namespace, Name: app.Name})
-	if err == nil {
+	if err != nil {
-		t.Fatal("syncHandler() error = nil, want parse error")
+		t.Fatalf("syncHandler() error = %v", err)
 	}
-	if !strings.Contains(err.Error(), "error parsing PK") {
+	if destroySlug != app.Spec.Slug {
-		t.Fatalf("syncHandler() error = %v, want PK parse error", err)
+		t.Fatalf("destroy slug = %q, want %q (delete must use spec.slug, not status.pk)", destroySlug, app.Spec.Slug)
 	}
 }
 
@@ -295,7 +301,7 @@ type authentikTestHandlers struct {
 	applicationCreate        http.HandlerFunc
 	applicationRetrieve      http.HandlerFunc
 	applicationPartialUpdate http.HandlerFunc
-	proxyDestroy             http.HandlerFunc
+	applicationDestroy       http.HandlerFunc
 }
 
 func newAuthentikTestServer(t *testing.T, handlers authentikTestHandlers) *httptest.Server {
@@ -331,26 +337,16 @@ func newAuthentikTestServer(t *testing.T, handlers authentikTestHandlers) *httpt
 					return
 				}
 				http.NotFound(w, r)
+			case http.MethodDelete:
+				if handlers.applicationDestroy != nil {
+					handlers.applicationDestroy(w, r)
+					return
+				}
+				http.NotFound(w, r)
 			default:
 				http.Error(w, "unexpected method on application instance", http.StatusMethodNotAllowed)
 			}
 
-		case strings.HasPrefix(path, "/api/v3/providers/proxy/") && strings.HasSuffix(path, "/"):
-			idPath := strings.TrimPrefix(path, "/api/v3/providers/proxy/")
-			if idPath == "" {
-				http.NotFound(w, r)
-				return
-			}
-			if r.Method == http.MethodDelete {
-				if handlers.proxyDestroy != nil {
-					handlers.proxyDestroy(w, r)
-					return
-				}
-				http.NotFound(w, r)
-				return
-			}
-			http.Error(w, "unexpected method on proxy instance", http.StatusMethodNotAllowed)
-
 		default:
 			http.NotFound(w, r)
 		}

pkg/controllers/policybinding/controller.go

@@ -37,8 +37,8 @@ import (
 	"k8s.io/client-go/util/workqueue"
 	"k8s.io/klog/v2"
 
+	"gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/internal/baseController"
 	v1alpha1 "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/apis/policybinding/v1alpha1"
-	controllers "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/controllers"
 	clientset "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/generated/clientset/versioned"
 	operatorscheme "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/generated/clientset/versioned/scheme"
 	informers "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/generated/informers/externalversions/policybinding/v1alpha1"
@@ -68,7 +68,7 @@ type PolicyBindingController struct {
 
 	policyBindingListener listers.PolicyBindingLister
 
-	controller *controllers.Controller
+	controller *baseController.Controller
 }
 
 func NewController(
@@ -98,7 +98,7 @@ func NewController(
 		authentik:              authentik,
 		policyBindingListener:  policyBindingInformer.Lister(),
 	}
-	c.controller = controllers.NewController(
+	c.controller = baseController.NewController(
 		ctx,
 		workqueue.NewTypedRateLimitingQueue(ratelimiter),
 		recorder,

pkg/controllers/proxyprovider/controller.go

@@ -38,8 +38,8 @@ import (
 	"k8s.io/client-go/util/workqueue"
 	"k8s.io/klog/v2"
 
+	"gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/internal/baseController"
 	v1alpha1 "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/apis/proxyprovider/v1alpha1"
-	controllers "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/controllers"
 	clientset "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/generated/clientset/versioned"
 	operatorscheme "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/generated/clientset/versioned/scheme"
 	informers "gitea.t000-n.de/t.behrendt/authentik-kubernetes-operator/pkg/generated/informers/externalversions/proxyprovider/v1alpha1"
@@ -69,7 +69,7 @@ type ProxyProviderController struct {
 
 	proxyLister listers.ProxyProviderLister
 
-	controller *controllers.Controller
+	controller *baseController.Controller
 }
 
 func NewController(
@@ -99,7 +99,7 @@ func NewController(
 		authentik:              authentik,
 		proxyLister:            proxyInformer.Lister(),
 	}
-	c.controller = controllers.NewController(
+	c.controller = baseController.NewController(
 		ctx,
 		workqueue.NewTypedRateLimitingQueue(ratelimiter),
 		recorder,
@@ -166,6 +166,12 @@ func (c *ProxyProviderController) reconcileDelete(ctx context.Context, pp *v1alp
 		return fmt.Errorf("error parsing PK: %v", err)
 	}
 
+	err = c.reconcileOutpost(ctx, pp.Spec.Outpost, int32(pk), ReconcileOutpostModeRemove)
+	if err != nil {
+		return fmt.Errorf("error when calling `reconcileOutpost`: %w", err)
+	}
+
+	// Delete ProxyProvider
 	r, err := c.authentik.ProvidersApi.ProvidersProxyDestroy(ctx, int32(pk)).Execute()
 	if err != nil {
 		// This handles an edge-case, where when the ProxyProvider on Authentik has already been deleted, but the finalizer is still present. We just remove the finalizer and return.
@@ -206,9 +212,13 @@ func (c *ProxyProviderController) reconcileUpdate(ctx context.Context, pp *v1alp
 	if err != nil {
 		return fmt.Errorf("error when calling `ProvidersAPI.ProvidersProxyPartialUpdate`: %w with response %v", err, r)
 	}
-
 	pp.Status.PK = strconv.Itoa(int(resp.Pk))
 
+	err = c.reconcileOutpost(ctx, pp.Spec.Outpost, int32(pk), ReconcileOutpostModeAdd)
+	if err != nil {
+		return fmt.Errorf("error when calling `reconcileOutpost`: %w", err)
+	}
+
 	return c.updateProxyProviderStatus(ctx, pp)
 }
 
@@ -225,6 +235,11 @@ func (c *ProxyProviderController) reconcileCreate(ctx context.Context, pp *v1alp
 		return fmt.Errorf("error when calling `ProvidersAPI.ProvidersProxyCreate`: %w with response %v", err, r)
 	}
 
+	err = c.reconcileOutpost(ctx, pp.Spec.Outpost, resp.Pk, ReconcileOutpostModeAdd)
+	if err != nil {
+		return fmt.Errorf("error when calling `reconcileOutpost`: %w", err)
+	}
+
 	pp.Status.PK = strconv.Itoa(int(resp.Pk))
 	return c.updateProxyProviderStatus(ctx, pp)
 }
@@ -244,3 +259,51 @@ func (c *ProxyProviderController) updateProxyProvider(ctx context.Context, pp *v
 	}
 	return nil
 }
+
+type ReconcileOutpostMode string
+
+const (
+	ReconcileOutpostModeAdd    ReconcileOutpostMode = "add"
+	ReconcileOutpostModeRemove ReconcileOutpostMode = "remove"
+)
+
+func (c *ProxyProviderController) reconcileOutpost(ctx context.Context, outpostId string, providerPk int32, mode ReconcileOutpostMode) error {
+	logger := klog.LoggerWithValues(klog.FromContext(ctx), "outpostId", outpostId, "providerPk", providerPk, "mode", mode)
+
+	outpost, r, err := c.authentik.OutpostsApi.OutpostsInstancesRetrieve(ctx, outpostId).Execute()
+	if err != nil {
+		return fmt.Errorf("error when calling `OutpostsAPI.OutpostsInstancesRetrieve`: %w with response %v", err, r)
+	}
+	updated := false
+
+	switch mode {
+	case ReconcileOutpostModeAdd:
+		if !slices.Contains(outpost.Providers, providerPk) {
+			outpost.Providers = append(outpost.Providers, providerPk)
+			updated = true
+		} else {
+			logger.V(4).Info("Provider already in outpost")
+		}
+	case ReconcileOutpostModeRemove:
+		if slices.Contains(outpost.Providers, providerPk) {
+			outpost.Providers = slices.Delete(outpost.Providers, slices.Index(outpost.Providers, providerPk), 1)
+			updated = true
+		}
+	default:
+		return fmt.Errorf("invalid mode: %s", mode)
+	}
+
+	if !updated {
+		return nil
+	}
+
+	outpostPartialUpdateRequest := &authentikapi.PatchedOutpostRequest{
+		Providers: outpost.Providers,
+	}
+	_, r, err = c.authentik.OutpostsApi.OutpostsInstancesPartialUpdate(ctx, outpostId).PatchedOutpostRequest(*outpostPartialUpdateRequest).Execute()
+	if err != nil {
+		return fmt.Errorf("error when calling `OutpostsAPI.OutpostsInstancesPartialUpdate`: %w with response %v", err, r)
+	}
+
+	return nil
+}

pkg/controllers/proxyprovider/controller_test.go

@@ -21,13 +21,30 @@ import (
 	"k8s.io/client-go/tools/cache"
 )
 
+const testOutpostID = "550e8400-e29b-41d4-a716-446655440000"
+
 func TestController_syncHandler_create(t *testing.T) {
 	const wantPK = 42
 
+	var outpostPartialUpdateCalled bool
 	server := newAuthentikTestServer(t, authentikTestHandlers{
 		proxyCreate: func(w http.ResponseWriter, _ *http.Request) {
 			writeJSON(t, w, http.StatusCreated, map[string]any{"pk": wantPK})
 		},
+		outpostRetrieve: outpostRetrieveHandler(t, nil),
+		outpostPartialUpdate: func(w http.ResponseWriter, r *http.Request) {
+			outpostPartialUpdateCalled = true
+			var body struct {
+				Providers []int32 `json:"providers"`
+			}
+			if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+				t.Fatalf("decode outpost patch body: %v", err)
+			}
+			if !slices.Contains(body.Providers, wantPK) {
+				t.Fatalf("patched providers = %v, want to contain %d", body.Providers, wantPK)
+			}
+			writeJSON(t, w, http.StatusOK, map[string]any{"pk": testOutpostID, "providers": body.Providers})
+		},
 	})
 	t.Cleanup(server.Close)
 
@@ -38,6 +55,41 @@ func TestController_syncHandler_create(t *testing.T) {
 	if err != nil {
 		t.Fatalf("syncHandler() error = %v", err)
 	}
+	if !outpostPartialUpdateCalled {
+		t.Fatal("expected Authentik outpost partial update call")
+	}
+
+	got := getProxyProvider(t, ctrl, "default", "test-pp")
+	if got.Status.PK != "42" {
+		t.Fatalf("status.pk = %q, want 42", got.Status.PK)
+	}
+}
+
+func TestController_syncHandler_create_providerAlreadyInOutpost(t *testing.T) {
+	const wantPK = 42
+
+	var outpostPartialUpdateCalled bool
+	server := newAuthentikTestServer(t, authentikTestHandlers{
+		proxyCreate: func(w http.ResponseWriter, _ *http.Request) {
+			writeJSON(t, w, http.StatusCreated, map[string]any{"pk": wantPK})
+		},
+		outpostRetrieve: outpostRetrieveHandler(t, []int32{wantPK}),
+		outpostPartialUpdate: func(w http.ResponseWriter, _ *http.Request) {
+			outpostPartialUpdateCalled = true
+		},
+	})
+	t.Cleanup(server.Close)
+
+	ctrl, ctx, cancel := newTestController(t, testProxyProvider(), server.URL)
+	t.Cleanup(cancel)
+
+	err := ctrl.syncHandler(ctx, cache.ObjectName{Namespace: "default", Name: "test-pp"})
+	if err != nil {
+		t.Fatalf("syncHandler() error = %v", err)
+	}
+	if outpostPartialUpdateCalled {
+		t.Fatal("did not expect Authentik outpost partial update when provider is already present")
+	}
 
 	got := getProxyProvider(t, ctrl, "default", "test-pp")
 	if got.Status.PK != "42" {
@@ -71,6 +123,7 @@ func TestController_syncHandler_update(t *testing.T) {
 	pp.Status.PK = "42"
 	pp.Finalizers = []string{DeleteAuthentikProxyProviderFinalizer}
 
+	var outpostPartialUpdateCalled bool
 	server := newAuthentikTestServer(t, authentikTestHandlers{
 		allRetrieve: func(w http.ResponseWriter, _ *http.Request) {
 			writeJSON(t, w, http.StatusOK, map[string]any{"pk": 42})
@@ -78,6 +131,20 @@ func TestController_syncHandler_update(t *testing.T) {
 		proxyPartialUpdate: func(w http.ResponseWriter, _ *http.Request) {
 			writeJSON(t, w, http.StatusOK, map[string]any{"pk": 42})
 		},
+		outpostRetrieve: outpostRetrieveHandler(t, nil),
+		outpostPartialUpdate: func(w http.ResponseWriter, r *http.Request) {
+			outpostPartialUpdateCalled = true
+			var body struct {
+				Providers []int32 `json:"providers"`
+			}
+			if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+				t.Fatalf("decode outpost patch body: %v", err)
+			}
+			if !slices.Contains(body.Providers, 42) {
+				t.Fatalf("patched providers = %v, want to contain 42", body.Providers)
+			}
+			writeJSON(t, w, http.StatusOK, map[string]any{"pk": testOutpostID, "providers": body.Providers})
+		},
 	})
 	t.Cleanup(server.Close)
 
@@ -88,6 +155,9 @@ func TestController_syncHandler_update(t *testing.T) {
 	if err != nil {
 		t.Fatalf("syncHandler() error = %v", err)
 	}
+	if !outpostPartialUpdateCalled {
+		t.Fatal("expected Authentik outpost partial update call")
+	}
 
 	got := getProxyProvider(t, ctrl, pp.Namespace, pp.Name)
 	if got.Status.PK != "42" {
@@ -122,14 +192,29 @@ func TestController_syncHandler_update_providerNotFound(t *testing.T) {
 }
 
 func TestController_syncHandler_delete(t *testing.T) {
+	const wantPK int32 = 42
 	now := metav1.Now()
 	pp := testProxyProvider()
 	pp.Status.PK = "42"
 	pp.DeletionTimestamp = &now
 	pp.Finalizers = []string{DeleteAuthentikProxyProviderFinalizer}
 
-	var destroyCalled bool
+	var outpostPartialUpdateCalled, destroyCalled bool
 	server := newAuthentikTestServer(t, authentikTestHandlers{
+		outpostRetrieve: outpostRetrieveHandler(t, []int32{wantPK}),
+		outpostPartialUpdate: func(w http.ResponseWriter, r *http.Request) {
+			outpostPartialUpdateCalled = true
+			var body struct {
+				Providers []int32 `json:"providers"`
+			}
+			if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+				t.Fatalf("decode outpost patch body: %v", err)
+			}
+			if slices.Contains(body.Providers, wantPK) {
+				t.Fatalf("patched providers = %v, want provider %d removed", body.Providers, wantPK)
+			}
+			writeJSON(t, w, http.StatusOK, map[string]any{"pk": testOutpostID, "providers": body.Providers})
+		},
 		proxyDestroy: func(w http.ResponseWriter, r *http.Request) {
 			destroyCalled = true
 			if r.Method != http.MethodDelete {
@@ -147,6 +232,49 @@ func TestController_syncHandler_delete(t *testing.T) {
 	if err != nil {
 		t.Fatalf("syncHandler() error = %v", err)
 	}
+	if !outpostPartialUpdateCalled {
+		t.Fatal("expected Authentik outpost partial update call")
+	}
+	if !destroyCalled {
+		t.Fatal("expected Authentik destroy call")
+	}
+
+	got := getProxyProvider(t, ctrl, pp.Namespace, pp.Name)
+	if slices.Contains(got.Finalizers, DeleteAuthentikProxyProviderFinalizer) {
+		t.Fatalf("finalizers = %v, want finalizer removed", got.Finalizers)
+	}
+}
+
+func TestController_syncHandler_delete_providerNotInOutpost(t *testing.T) {
+	now := metav1.Now()
+	pp := testProxyProvider()
+	pp.Status.PK = "42"
+	pp.DeletionTimestamp = &now
+	pp.Finalizers = []string{DeleteAuthentikProxyProviderFinalizer}
+
+	var outpostPartialUpdateCalled, destroyCalled bool
+	server := newAuthentikTestServer(t, authentikTestHandlers{
+		outpostRetrieve: outpostRetrieveHandler(t, nil),
+		outpostPartialUpdate: func(w http.ResponseWriter, _ *http.Request) {
+			outpostPartialUpdateCalled = true
+		},
+		proxyDestroy: func(w http.ResponseWriter, _ *http.Request) {
+			destroyCalled = true
+			w.WriteHeader(http.StatusNoContent)
+		},
+	})
+	t.Cleanup(server.Close)
+
+	ctrl, ctx, cancel := newTestController(t, pp, server.URL)
+	t.Cleanup(cancel)
+
+	err := ctrl.syncHandler(ctx, cache.ObjectName{Namespace: pp.Namespace, Name: pp.Name})
+	if err != nil {
+		t.Fatalf("syncHandler() error = %v", err)
+	}
+	if outpostPartialUpdateCalled {
+		t.Fatal("did not expect Authentik outpost partial update when provider is not in outpost")
+	}
 	if !destroyCalled {
 		t.Fatal("expected Authentik destroy call")
 	}
@@ -158,6 +286,7 @@ func TestController_syncHandler_delete(t *testing.T) {
 }
 
 func TestController_syncHandler_delete_providerAlreadyGone(t *testing.T) {
+	const wantPK int32 = 42
 	now := metav1.Now()
 	pp := testProxyProvider()
 	pp.Status.PK = "42"
@@ -165,6 +294,16 @@ func TestController_syncHandler_delete_providerAlreadyGone(t *testing.T) {
 	pp.Finalizers = []string{DeleteAuthentikProxyProviderFinalizer}
 
 	server := newAuthentikTestServer(t, authentikTestHandlers{
+		outpostRetrieve: outpostRetrieveHandler(t, []int32{wantPK}),
+		outpostPartialUpdate: func(w http.ResponseWriter, r *http.Request) {
+			var body struct {
+				Providers []int32 `json:"providers"`
+			}
+			if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+				t.Fatalf("decode outpost patch body: %v", err)
+			}
+			writeJSON(t, w, http.StatusOK, map[string]any{"pk": testOutpostID, "providers": body.Providers})
+		},
 		proxyDestroy: func(w http.ResponseWriter, _ *http.Request) {
 			http.NotFound(w, nil)
 		},
@@ -235,6 +374,7 @@ func testProxyProvider() *v1alpha1.ProxyProvider {
 			AuthorizationFlow: "flow-auth",
 			InvalidationFlow:  "flow-invalidate",
 			ExternalHost:      "https://app.example.com",
+			Outpost:           testOutpostID,
 		},
 	}
 }
@@ -295,6 +435,18 @@ type authentikTestHandlers struct {
 	proxyDestroy         http.HandlerFunc
 	proxyPartialUpdate   http.HandlerFunc
 	allRetrieve          http.HandlerFunc
+	outpostRetrieve      http.HandlerFunc
+	outpostPartialUpdate http.HandlerFunc
+}
+
+func outpostRetrieveHandler(t *testing.T, providers []int32) http.HandlerFunc {
+	t.Helper()
+	return func(w http.ResponseWriter, _ *http.Request) {
+		writeJSON(t, w, http.StatusOK, map[string]any{
+			"pk":        testOutpostID,
+			"providers": providers,
+		})
+	}
 }
 
 func newAuthentikTestServer(t *testing.T, handlers authentikTestHandlers) *httptest.Server {
@@ -341,6 +493,30 @@ func newAuthentikTestServer(t *testing.T, handlers authentikTestHandlers) *httpt
 			}
 			http.NotFound(w, r)
 
+		case strings.HasPrefix(path, "/api/v3/outposts/instances/") && strings.HasSuffix(path, "/"):
+			idPath := strings.TrimPrefix(path, "/api/v3/outposts/instances/")
+			idPath = strings.TrimSuffix(idPath, "/")
+			if idPath == "" || strings.Contains(idPath, "/") {
+				http.NotFound(w, r)
+				return
+			}
+			switch r.Method {
+			case http.MethodGet:
+				if handlers.outpostRetrieve != nil {
+					handlers.outpostRetrieve(w, r)
+					return
+				}
+				http.NotFound(w, r)
+			case http.MethodPatch:
+				if handlers.outpostPartialUpdate != nil {
+					handlers.outpostPartialUpdate(w, r)
+					return
+				}
+				http.NotFound(w, r)
+			default:
+				http.Error(w, "unexpected method on outpost instance", http.StatusMethodNotAllowed)
+			}
+
 		default:
 			http.NotFound(w, r)
 		}

pkg/generated/applyconfiguration/proxyprovider/v1alpha1/proxyproviderspec.go

@@ -25,6 +25,7 @@ type ProxyProviderSpecApplyConfiguration struct {
 	AuthorizationFlow *string `json:"authorization_flow,omitempty"`
 	InvalidationFlow  *string `json:"invalidation_flow,omitempty"`
 	ExternalHost      *string `json:"external_host,omitempty"`
+	Outpost           *string `json:"outpost,omitempty"`
 }
 
 // ProxyProviderSpecApplyConfiguration constructs a declarative configuration of the ProxyProviderSpec type for use with
@@ -64,3 +65,11 @@ func (b *ProxyProviderSpecApplyConfiguration) WithExternalHost(value string) *Pr
 	b.ExternalHost = &value
 	return b
 }
+
+// WithOutpost sets the Outpost field in the declarative configuration to the given value
+// and returns the receiver, so that objects can be built by chaining "With" function invocations.
+// If called multiple times, the Outpost field is set to the value of the last call.
+func (b *ProxyProviderSpecApplyConfiguration) WithOutpost(value string) *ProxyProviderSpecApplyConfiguration {
+	b.Outpost = &value
+	return b
+}

pkg/generated/openapi/zz_generated.openapi.go

@@ -536,8 +536,15 @@ func schema_pkg_apis_proxyprovider_v1alpha1_ProxyProviderSpec(ref common.Referen
 							Format:  "",
 						},
 					},
+					"outpost": {
+						SchemaProps: spec.SchemaProps{
+							Default: "",
+							Type:    []string{"string"},
+							Format:  "",
 						},
-				Required: []string{"name", "authorization_flow", "invalidation_flow", "external_host"},
+					},
+				},
+				Required: []string{"name", "authorization_flow", "invalidation_flow", "external_host", "outpost"},
 			},
 		},
 	}
@@ -3056,7 +3063,7 @@ func schema_k8sio_apimachinery_pkg_runtime_RawExtension(ref common.ReferenceCall
 	return common.OpenAPIDefinition{
 		Schema: spec.Schema{
 			SchemaProps: spec.SchemaProps{
-				Description: "RawExtension is used to hold extensions in external versions.\n\nTo use this, make a field which has RawExtension as its type in your external, versioned struct, and Object in your internal struct. You also need to register your various plugin types.\n\n// Internal package:\n\n\ttype MyAPIObject struct {\n\t\truntime.TypeMeta `json:\"\"`\n\t\tMyPlugin runtime.Object `json:\"myPlugin\"`\n\t}\n\n\ttype PluginA struct {\n\t\tAOption string `json:\"aOption\"`\n\t}\n\n// External package:\n\n\ttype MyAPIObject struct {\n\t\truntime.TypeMeta `json:\"\"`\n\t\tMyPlugin runtime.RawExtension `json:\"myPlugin\"`\n\t}\n\n\ttype PluginA struct {\n\t\tAOption string `json:\"aOption\"`\n\t}\n\n// On the wire, the JSON will look something like this:\n\n\t{\n\t\t\"kind\":\"MyAPIObject\",\n\t\t\"apiVersion\":\"v1\",\n\t\t\"myPlugin\": {\n\t\t\t\"kind\":\"PluginA\",\n\t\t\t\"aOption\":\"foo\",\n\t\t},\n\t}\n\nSo what happens? Decode first uses json or yaml to unmarshal the serialized data into your external MyAPIObject. That causes the raw JSON to be stored, but not unpacked. The next step is to copy (using pkg/conversion) into the internal struct. The runtime package's DefaultScheme has conversion functions installed which will unpack the JSON stored in RawExtension, turning it into the correct object type, and storing it in the Object. (TODO: In the case where the object is of an unknown type, a runtime.Unknown object will be created and stored.)",
+				Description: "RawExtension is used to hold extensions in external versions.\n\nTo use this, make a field which has RawExtension as its type in your external, versioned struct, and Object in your internal struct. You also need to register your various plugin types.\n\n// Internal package:\n\n\ttype MyAPIObject struct {\n\t\truntime.TypeMeta `json:\",inline\"`\n\t\tMyPlugin runtime.Object `json:\"myPlugin\"`\n\t}\n\n\ttype PluginA struct {\n\t\tAOption string `json:\"aOption\"`\n\t}\n\n// External package:\n\n\ttype MyAPIObject struct {\n\t\truntime.TypeMeta `json:\",inline\"`\n\t\tMyPlugin runtime.RawExtension `json:\"myPlugin\"`\n\t}\n\n\ttype PluginA struct {\n\t\tAOption string `json:\"aOption\"`\n\t}\n\n// On the wire, the JSON will look something like this:\n\n\t{\n\t\t\"kind\":\"MyAPIObject\",\n\t\t\"apiVersion\":\"v1\",\n\t\t\"myPlugin\": {\n\t\t\t\"kind\":\"PluginA\",\n\t\t\t\"aOption\":\"foo\",\n\t\t},\n\t}\n\nSo what happens? Decode first uses json or yaml to unmarshal the serialized data into your external MyAPIObject. That causes the raw JSON to be stored, but not unpacked. The next step is to copy (using pkg/conversion) into the internal struct. The runtime package's DefaultScheme has conversion functions installed which will unpack the JSON stored in RawExtension, turning it into the correct object type, and storing it in the Object. (TODO: In the case where the object is of an unknown type, a runtime.Unknown object will be created and stored.)",
 				Type:        []string{"object"},
 			},
 		},
@@ -3067,7 +3074,7 @@ func schema_k8sio_apimachinery_pkg_runtime_TypeMeta(ref common.ReferenceCallback
 	return common.OpenAPIDefinition{
 		Schema: spec.Schema{
 			SchemaProps: spec.SchemaProps{
-				Description: "TypeMeta is shared by all top level objects. The proper way to use it is to inline it in your type, like this:\n\n\ttype MyAwesomeAPIObject struct {\n\t     runtime.TypeMeta    `json:\"\"`\n\t     ... // other fields\n\t}\n\nfunc (obj *MyAwesomeAPIObject) SetGroupVersionKind(gvk *metav1.GroupVersionKind) { metav1.UpdateTypeMeta(obj,gvk) }; GroupVersionKind() *GroupVersionKind\n\nTypeMeta is provided here for convenience. You may use it directly from this package or define your own with the same fields.",
+				Description: "TypeMeta is shared by all top level objects. The proper way to use it is to inline it in your type, like this:\n\n\ttype MyAwesomeAPIObject struct {\n\t     runtime.TypeMeta    `json:\",inline\"`\n\t     ... // other fields\n\t}\n\nfunc (obj *MyAwesomeAPIObject) SetGroupVersionKind(gvk *metav1.GroupVersionKind) { metav1.UpdateTypeMeta(obj,gvk) }; GroupVersionKind() *GroupVersionKind\n\nTypeMeta is provided here for convenience. You may use it directly from this package or define your own with the same fields.",
 				Type:        []string{"object"},
 				Properties: map[string]spec.Schema{
 					"apiVersion": {