feat: add support for kserve with authorino

* Activate extauth for grpc traffic
* Set host on requests from activator to trigger authconfig
* Temp Authorization header fix to workaround https://issues.redhat.com/browse/OSSM-4873

Related to: opendatahub-io#614

components/kserve/kserve.go

@@ -3,13 +3,16 @@ package kserve
 
 import (
 	"fmt"
+	"path"
 	"path/filepath"
 	"strings"
 
 	dsci "github.com/opendatahub-io/opendatahub-operator/v2/apis/dscinitialization/v1"
 	"github.com/opendatahub-io/opendatahub-operator/v2/components"
 	"github.com/opendatahub-io/opendatahub-operator/v2/pkg/cluster"
 	"github.com/opendatahub-io/opendatahub-operator/v2/pkg/deploy"
+	"github.com/opendatahub-io/opendatahub-operator/v2/pkg/feature"
+	"github.com/opendatahub-io/opendatahub-operator/v2/pkg/feature/servicemesh"
 	operatorv1 "github.com/openshift/api/operator/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"sigs.k8s.io/controller-runtime/pkg/client"
@@ -124,7 +127,7 @@ func (k *Kserve) ReconcileComponent(cli client.Client, owner metav1.Object, dsci
 		if err := cluster.UpdatePodSecurityRolebinding(cli, dscispec.ApplicationsNamespace, "odh-model-controller"); err != nil {
 			return err
 		}
-		// Update image parameters for odh-maodel-controller
+		// Update image parameters for odh-model-controller
 		if dscispec.DevFlags.ManifestsUri == "" && len(k.DevFlags.Manifests) == 0 {
 			if err := deploy.ApplyParams(DependentPath, k.SetImageParamsMap(dependentParamMap), false); err != nil {
 				return err
@@ -140,10 +143,62 @@ func (k *Kserve) ReconcileComponent(cli client.Client, owner metav1.Object, dsci
 		}
 	}
 
+	if enabled {
+		if err := k.configureServiceMesh(cli, dscispec); err != nil {
+			return err
+		}
+	}
+
 	return nil
 }
 
 func (k *Kserve) DeepCopyInto(target *Kserve) {
 	*target = *k
 	target.Component = k.Component
 }
+
+func (k *Kserve) configureServiceMesh(cli client.Client, dscispec *dsci.DSCInitializationSpec) error {
+	shouldConfigureServiceMesh, err := deploy.ShouldConfigureServiceMesh(cli, dscispec)
+	if err != nil {
+		return err
+	}
+
+	if shouldConfigureServiceMesh {
+		serviceMeshInitializer := servicemesh.NewServiceMeshInitializer(dscispec, k.defineServiceMeshFeatures(dscispec))
+
+		if err := serviceMeshInitializer.Prepare(); err != nil {
+			return err
+		}
+
+		if err := serviceMeshInitializer.Apply(); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (k *Kserve) defineServiceMeshFeatures(dscispec *dsci.DSCInitializationSpec) servicemesh.DefineFeatures {
+	return func(s *servicemesh.ServiceMeshInitializer) error {
+		var rootDir = filepath.Join(feature.BaseOutputDir, dscispec.ApplicationsNamespace)
+		if err := feature.CopyEmbeddedFiles("templates", rootDir); err != nil {
+			return err
+		}
+
+		kserve, err := feature.CreateFeature("configure-kserve-for-external-authz").
+			For(dscispec).
+			Manifests(
+				path.Join(rootDir, feature.KServeDir),
+			).
+			WithData(servicemesh.ClusterDetails).
+			Load()
+
+		if err != nil {
+			return err
+		}
+
+		s.Features = append(s.Features, kserve)
+
+		return nil
+	}
+}

pkg/feature/manifest.go

@@ -2,17 +2,19 @@ package feature
 
 import (
 	"fmt"
-	"github.com/pkg/errors"
 	"html/template"
 	"os"
 	"path/filepath"
 	"strings"
+
+	"github.com/pkg/errors"
 )
 
 const (
 	BaseDir         = "templates/servicemesh/"
 	ControlPlaneDir = BaseDir + "control-plane"
 	AuthDir         = BaseDir + "authorino"
+	KServeDir       = BaseDir + "kserve"
 	BaseOutputDir   = "/tmp/servicemesh-manifests/"
 )
 

pkg/feature/templates/servicemesh/kserve/activator-envoyfilter.tmpl

@@ -0,0 +1,42 @@
+apiVersion: networking.istio.io/v1alpha3
+kind: EnvoyFilter
+metadata:
+  labels:
+    app: odh
+  name: activator-host-header
+  namespace: {{ .Mesh.Namespace }}
+spec:
+  priority: 20
+  workloadSelector:
+    labels:
+      component: predictor
+  configPatches:
+  - applyTo: HTTP_FILTER
+    match:
+      listener:
+        filterChain:
+          filter:
+            name: envoy.filters.network.http_connection_manager
+    patch:
+      operation: INSERT_BEFORE
+      value:
+        name: envoy.filters.http.lua
+        typed_config:
+          '@type': type.googleapis.com/envoy.extensions.filters.http.lua.v3.Lua
+          inlineCode: |
+           function envoy_on_request(request_handle)
+              local headers = request_handle:headers()
+              if not headers then
+                return
+              end
+
+              local original_host = headers:get("k-original-host")
+              if original_host then
+
+                port_seperator = string.find(original_host, ":", 7)
+                if port_seperator then
+                  original_host = string.sub(original_host, 0, port_seperator-1)
+                end
+                headers:replace('host', original_host)
+              end
+            end

pkg/feature/templates/servicemesh/kserve/envoy-oauth-temp-fix.tmpl

@@ -0,0 +1,79 @@
+# https://issues.redhat.com/browse/OSSM-4873
+apiVersion: networking.istio.io/v1alpha3
+kind: EnvoyFilter
+metadata:
+  name: envoy-oauth-temp-fix-before
+  namespace: {{ .Mesh.Namespace }}
+  labels:
+    app: odh
+    temp: hack
+spec:
+  workloadSelector:
+    labels:
+      istio: ingressgateway
+  priority: 20
+  configPatches:
+  - applyTo: HTTP_FILTER
+    match:
+      listener:
+        filterChain:
+          filter:
+            name: envoy.filters.network.http_connection_manager
+    patch:
+      operation: INSERT_BEFORE
+      value:
+        name: envoy.filters.http.lua
+        typed_config:
+          "@type": type.googleapis.com/envoy.extensions.filters.http.lua.v3.Lua
+          inlineCode: |
+           function envoy_on_request(request_handle)
+              local headers = request_handle:headers()
+              if not headers then
+                return
+              end
+
+              local auth = headers:get("authorization")
+              if auth then
+                headers:replace("x-authorization", auth)
+              end
+            end
+---
+apiVersion: networking.istio.io/v1alpha3
+kind: EnvoyFilter
+metadata:
+  name: envoy-oauth-temp-fix-after
+  namespace: {{ .Mesh.Namespace }}
+  labels:
+    app: odh
+    temp: hack
+spec:
+  workloadSelector:
+    labels:
+      istio: ingressgateway
+  priority: 5
+  configPatches:
+  - applyTo: HTTP_FILTER
+    match:
+      listener:
+        filterChain:
+          filter:
+            name: envoy.filters.network.http_connection_manager
+    patch:
+      operation: INSERT_BEFORE
+      value:
+        name: envoy.filters.http.lua
+        typed_config:
+          "@type": type.googleapis.com/envoy.extensions.filters.http.lua.v3.Lua
+          inlineCode: |
+           function envoy_on_request(request_handle)
+              local headers = request_handle:headers()
+              if not headers then
+                return
+              end
+
+              local xauth = headers:get("x-authorization")
+              if xauth then
+                headers:replace("authorization", xauth)
+                headers.remove("x-authorization")
+              end
+            end

pkg/feature/templates/servicemesh/kserve/grpc-authorizationpolicy.tmpl

@@ -0,0 +1,19 @@
+apiVersion: security.istio.io/v1beta1
+kind: AuthorizationPolicy
+metadata:
+  name: kserve-predicator
+  namespace: {{ .Mesh.Namespace }}
+spec:
+  action: CUSTOM
+  provider:
+    name: opendatahub-odh-auth-provider
+  rules:
+  - to:
+    - operation:
+        notPaths:
+        - /healthz*
+        ports:
+        - "8013"
+  selector:
+    matchLabels:
+      component: predictor