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feat: move x-k8s to apix and add v1 InferencePool to api/v1 (#1116)
* rename x-k8s to apix and add v1 InferencePool to api/v1 * updated docker file * fixed naming collision * added fake approved annotation * try to fix unit tests * fixed typo * added annotation * fixed annotation * Update api/v1/inferencepool_types.go Co-authored-by: Rob Scott <[email protected]> * Apply suggestions from code review Co-authored-by: Rob Scott <[email protected]> * use v1 type in v1alpha2 * clean unused depdendency * fixed code generator error * revert back * merge bob's change * upadted code-gen * remove deep copy needs * use codegen * revert to workable version * re-run generate * revert to workable version * change to use v1alpha2 back * resolve merge conflicts * fixed typo * fixed typo * fixed pipeline * fixed boilerplate Signed-off-by: Xiyue Yu <[email protected]> * updated missing dependency * fixed change * fixed format * fixed import issue * fixed format --------- Signed-off-by: Xiyue Yu <[email protected]> Co-authored-by: Rob Scott <[email protected]>
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‎Dockerfile‎

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@@ -20,6 +20,7 @@ RUN go mod download
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COPY cmd/epp ./cmd/epp
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COPY pkg/epp ./pkg/epp
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COPY internal ./internal
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COPY apix ./apix
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COPY api ./api
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COPY version ./version
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WORKDIR /src/cmd/epp

‎api/v1/doc.go‎

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/*
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Copyright 2025 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package v1 contains API Schema definitions for the
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// inference.networking.k8s.io API group.
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//
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// +k8s:openapi-gen=true
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// +kubebuilder:object:generate=true
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// +groupName=inference.networking.k8s.io
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// +groupGoName=Inference
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package v1

‎api/v1/inferencepool_types.go‎

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/*
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Copyright 2025 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package v1
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import (
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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)
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// InferencePool is the Schema for the InferencePools API.
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//
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// +kubebuilder:object:root=true
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// TODO: change the annotation once it gets officially approved
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// +kubebuilder:metadata:annotations="api-approved.kubernetes.io=unapproved, experimental-only"
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// +kubebuilder:subresource:status
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// +kubebuilder:storageversion
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// +genclient
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type InferencePool struct {
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metav1.TypeMeta `json:",inline"`
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metav1.ObjectMeta `json:"metadata,omitempty"`
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Spec InferencePoolSpec `json:"spec,omitempty"`
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// Status defines the observed state of InferencePool.
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//
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// +kubebuilder:default={parent: {{parentRef: {kind: "Status", name: "default"}, conditions: {{type: "Accepted", status: "Unknown", reason: "Pending", message: "Waiting for controller", lastTransitionTime: "1970-01-01T00:00:00Z"}}}}}
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Status InferencePoolStatus `json:"status,omitempty"`
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}
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// InferencePoolList contains a list of InferencePool.
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//
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// +kubebuilder:object:root=true
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type InferencePoolList struct {
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metav1.TypeMeta `json:",inline"`
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metav1.ListMeta `json:"metadata,omitempty"`
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Items []InferencePool `json:"items"`
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}
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// InferencePoolSpec defines the desired state of InferencePool
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type InferencePoolSpec struct {
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// Selector defines a map of labels to watch model server Pods
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// that should be included in the InferencePool.
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// In some cases, implementations may translate this field to a Service selector, so this matches the simple
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// map used for Service selectors instead of the full Kubernetes LabelSelector type.
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// If specified, it will be applied to match the model server pods in the same namespace as the InferencePool.
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// Cross namesoace selector is not supported.
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//
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// +kubebuilder:validation:Required
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Selector map[LabelKey]LabelValue `json:"selector"`
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// TargetPortNumber defines the port number to access the selected model server Pods.
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// The number must be in the range 1 to 65535.
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//
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// +kubebuilder:validation:Minimum=1
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// +kubebuilder:validation:Maximum=65535
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// +kubebuilder:validation:Required
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TargetPortNumber int32 `json:"targetPortNumber"`
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// EndpointPickerConfig specifies the configuration needed by the proxy to discover and connect to the endpoint
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// picker service that picks endpoints for the requests routed to this pool.
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EndpointPickerConfig `json:",inline"`
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}
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// EndpointPickerConfig specifies the configuration needed by the proxy to discover and connect to the endpoint picker extension.
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// This type is intended to be a union of mutually exclusive configuration options that we may add in the future.
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type EndpointPickerConfig struct {
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// Extension configures an endpoint picker as an extension service.
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//
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// +kubebuilder:validation:Required
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ExtensionRef *Extension `json:"extensionRef,omitempty"`
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}
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// Extension specifies how to configure an extension that runs the endpoint picker.
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type Extension struct {
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// Reference is a reference to a service extension. When ExtensionReference is invalid,
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// a 5XX status code MUST be returned for the request that would have otherwise been routed
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// to the invalid backend.
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ExtensionReference `json:",inline"`
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// ExtensionConnection configures the connection between the Gateway and the extension.
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ExtensionConnection `json:",inline"`
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}
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// ExtensionReference is a reference to the extension.
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//
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// If a reference is invalid, the implementation MUST update the `ResolvedRefs`
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// Condition on the InferencePool's status to `status: False`. A 5XX status code MUST be returned
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// for the request that would have otherwise been routed to the invalid backend.
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type ExtensionReference struct {
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// Group is the group of the referent.
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// The default value is "", representing the Core API group.
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//
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// +optional
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// +kubebuilder:default=""
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Group *Group `json:"group,omitempty"`
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// Kind is the Kubernetes resource kind of the referent.
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//
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// Defaults to "Service" when not specified.
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//
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// ExternalName services can refer to CNAME DNS records that may live
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// outside of the cluster and as such are difficult to reason about in
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// terms of conformance. They also may not be safe to forward to (see
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// CVE-2021-25740 for more information). Implementations MUST NOT
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// support ExternalName Services.
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//
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// +optional
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// +kubebuilder:default=Service
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Kind *Kind `json:"kind,omitempty"`
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// Name is the name of the referent.
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//
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// +kubebuilder:validation:Required
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Name ObjectName `json:"name"`
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// The port number on the service running the extension. When unspecified,
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// implementations SHOULD infer a default value of 9002 when the Kind is
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// Service.
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//
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// +optional
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PortNumber *PortNumber `json:"portNumber,omitempty"`
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}
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// ExtensionConnection encapsulates options that configures the connection to the extension.
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type ExtensionConnection struct {
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// Configures how the gateway handles the case when the extension is not responsive.
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// Defaults to failClose.
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//
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// +optional
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// +kubebuilder:default="FailClose"
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FailureMode *ExtensionFailureMode `json:"failureMode"`
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}
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// ExtensionFailureMode defines the options for how the gateway handles the case when the extension is not
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// responsive.
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// +kubebuilder:validation:Enum=FailOpen;FailClose
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type ExtensionFailureMode string
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const (
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// FailOpen specifies that the proxy should forward the request to an endpoint of its picking when the Endpoint Picker fails.
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FailOpen ExtensionFailureMode = "FailOpen"
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// FailClose specifies that the proxy should drop the request when the Endpoint Picker fails.
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FailClose ExtensionFailureMode = "FailClose"
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)
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// InferencePoolStatus defines the observed state of InferencePool.
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type InferencePoolStatus struct {
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// Parents is a list of parent resources (usually Gateways) that are
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// associated with the InferencePool, and the status of the InferencePool with respect to
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// each parent.
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//
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// A maximum of 32 Gateways will be represented in this list. When the list contains
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// `kind: Status, name: default`, it indicates that the InferencePool is not
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// associated with any Gateway and a controller must perform the following:
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//
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// - Remove the parent when setting the "Accepted" condition.
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// - Add the parent when the controller will no longer manage the InferencePool
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// and no other parents exist.
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//
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// +kubebuilder:validation:MaxItems=32
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Parents []PoolStatus `json:"parent,omitempty"`
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}
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// PoolStatus defines the observed state of InferencePool from a Gateway.
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type PoolStatus struct {
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// GatewayRef indicates the gateway that observed state of InferencePool.
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GatewayRef ParentGatewayReference `json:"parentRef"`
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// Conditions track the state of the InferencePool.
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//
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// Known condition types are:
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//
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// * "Accepted"
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// * "ResolvedRefs"
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//
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// +optional
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// +listType=map
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// +listMapKey=type
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// +kubebuilder:validation:MaxItems=8
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// +kubebuilder:default={{type: "Accepted", status: "Unknown", reason:"Pending", message:"Waiting for controller", lastTransitionTime: "1970-01-01T00:00:00Z"}}
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Conditions []metav1.Condition `json:"conditions,omitempty"`
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}
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// InferencePoolConditionType is a type of condition for the InferencePool
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type InferencePoolConditionType string
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// InferencePoolReason is the reason for a given InferencePoolConditionType
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type InferencePoolReason string
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const (
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// This condition indicates whether the InferencePool has been accepted or rejected
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// by a Gateway, and why.
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//
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// Possible reasons for this condition to be True are:
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//
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// * "Accepted"
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//
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// Possible reasons for this condition to be False are:
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//
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// * "NotSupportedByGateway"
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// * "HTTPRouteNotAccepted"
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//
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// Possible reasons for this condition to be Unknown are:
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//
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// * "Pending"
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//
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// Controllers MAY raise this condition with other reasons, but should
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// prefer to use the reasons listed above to improve interoperability.
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InferencePoolConditionAccepted InferencePoolConditionType = "Accepted"
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// This reason is used with the "Accepted" condition when the InferencePool has been
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// accepted by the Gateway.
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InferencePoolReasonAccepted InferencePoolReason = "Accepted"
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// This reason is used with the "Accepted" condition when the InferencePool
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// has not been accepted by a Gateway because the Gateway does not support
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// InferencePool as a backend.
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InferencePoolReasonNotSupportedByGateway InferencePoolReason = "NotSupportedByGateway"
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// This reason is used with the "Accepted" condition when the InferencePool is
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// referenced by an HTTPRoute that has been rejected by the Gateway. The user
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// should inspect the status of the referring HTTPRoute for the specific reason.
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InferencePoolReasonHTTPRouteNotAccepted InferencePoolReason = "HTTPRouteNotAccepted"
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// This reason is used with the "Accepted" when a controller has not yet
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// reconciled the InferencePool.
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InferencePoolReasonPending InferencePoolReason = "Pending"
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)
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const (
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// This condition indicates whether the controller was able to resolve all
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// the object references for the InferencePool.
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//
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// Possible reasons for this condition to be True are:
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//
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// * "ResolvedRefs"
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//
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// Possible reasons for this condition to be False are:
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//
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// * "InvalidExtensionRef"
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//
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// Controllers MAY raise this condition with other reasons, but should
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// prefer to use the reasons listed above to improve interoperability.
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InferencePoolConditionResolvedRefs InferencePoolConditionType = "ResolvedRefs"
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// This reason is used with the "ResolvedRefs" condition when the condition
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// is true.
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InferencePoolReasonResolvedRefs InferencePoolReason = "ResolvedRefs"
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// This reason is used with the "ResolvedRefs" condition when the
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// ExtensionRef is invalid in some way. This can include an unsupported kind
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// or API group, or a reference to a resource that can not be found.
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InferencePoolReasonInvalidExtensionRef InferencePoolReason = "InvalidExtensionRef"
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)
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// ParentGatewayReference identifies an API object including its namespace,
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// defaulting to Gateway.
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type ParentGatewayReference struct {
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// Group is the group of the referent.
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//
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// +optional
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// +kubebuilder:default="gateway.networking.k8s.io"
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Group *Group `json:"group"`
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// Kind is kind of the referent. For example "Gateway".
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//
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// +optional
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// +kubebuilder:default=Gateway
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Kind *Kind `json:"kind"`
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// Name is the name of the referent.
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Name ObjectName `json:"name"`
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// Namespace is the namespace of the referent. If not present,
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// the namespace of the referent is assumed to be the same as
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// the namespace of the referring object.
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//
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// +optional
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Namespace *Namespace `json:"namespace,omitempty"`
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}

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