new driver: kubernetes

Tested with `kind` and GKE.

Note: "nodes" shown in `docker buildx ls` are unrelated to Kubernetes "nodes".
Probably buildx should come up with an alternative term.

Usage:

  $ kind create cluster
  $ export KUBECONFIG="$(kind get kubeconfig-path --name="kind")"

  $ docker buildx create --driver kubernetes --driver-opt replicas=3 --use
  $ docker buildx build -t foo --load .

`--load` loads the image into the local Docker.

Driver opts:

  - `image=IMAGE` - Sets the container image to be used for running buildkit.
  - `namespace=NS` - Sets the Kubernetes namespace. Defaults to the current namespace.
  - `replicas=N` - Sets the number of `Pod` replicas. Defaults to 1.
  - `rootless=(true|false)` - Run the container as a non-root user without `securityContext.privileged`. Defaults to false.
  - `loadbalance=(sticky|random)` - Load-balancing strategy. If set to "sticky", the pod is chosen using the hash of the context path. Defaults to "sticky"

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

vendor/k8s.io/api/authentication/v1beta1/doc.go

@@ -0,0 +1,20 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+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.
+*/
+
+// +k8s:deepcopy-gen=package
+// +groupName=authentication.k8s.io
+// +k8s:openapi-gen=true
+package v1beta1 // import "k8s.io/api/authentication/v1beta1"

vendor/k8s.io/api/authentication/v1beta1/generated.proto

@@ -0,0 +1,99 @@
+/*
+Copyright The Kubernetes Authors.
+
+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.
+*/
+
+
+// This file was autogenerated by go-to-protobuf. Do not edit it manually!
+
+syntax = 'proto2';
+
+package k8s.io.api.authentication.v1beta1;
+
+import "k8s.io/apimachinery/pkg/apis/meta/v1/generated.proto";
+import "k8s.io/apimachinery/pkg/runtime/generated.proto";
+import "k8s.io/apimachinery/pkg/runtime/schema/generated.proto";
+import "k8s.io/apimachinery/pkg/util/intstr/generated.proto";
+
+// Package-wide variables from generator "generated".
+option go_package = "v1beta1";
+
+// ExtraValue masks the value so protobuf can generate
+// +protobuf.nullable=true
+// +protobuf.options.(gogoproto.goproto_stringer)=false
+message ExtraValue {
+  // items, if empty, will result in an empty slice
+
+  repeated string items = 1;
+}
+
+// TokenReview attempts to authenticate a token to a known user.
+// Note: TokenReview requests may be cached by the webhook token authenticator
+// plugin in the kube-apiserver.
+message TokenReview {
+  // +optional
+  optional k8s.io.apimachinery.pkg.apis.meta.v1.ObjectMeta metadata = 1;
+
+  // Spec holds information about the request being evaluated
+  optional TokenReviewSpec spec = 2;
+
+  // Status is filled in by the server and indicates whether the request can be authenticated.
+  // +optional
+  optional TokenReviewStatus status = 3;
+}
+
+// TokenReviewSpec is a description of the token authentication request.
+message TokenReviewSpec {
+  // Token is the opaque bearer token.
+  // +optional
+  optional string token = 1;
+}
+
+// TokenReviewStatus is the result of the token authentication request.
+message TokenReviewStatus {
+  // Authenticated indicates that the token was associated with a known user.
+  // +optional
+  optional bool authenticated = 1;
+
+  // User is the UserInfo associated with the provided token.
+  // +optional
+  optional UserInfo user = 2;
+
+  // Error indicates that the token couldn't be checked
+  // +optional
+  optional string error = 3;
+}
+
+// UserInfo holds the information about the user needed to implement the
+// user.Info interface.
+message UserInfo {
+  // The name that uniquely identifies this user among all active users.
+  // +optional
+  optional string username = 1;
+
+  // A unique value that identifies this user across time. If this user is
+  // deleted and another user by the same name is added, they will have
+  // different UIDs.
+  // +optional
+  optional string uid = 2;
+
+  // The names of groups this user is a part of.
+  // +optional
+  repeated string groups = 3;
+
+  // Any additional information provided by the authenticator.
+  // +optional
+  map<string, ExtraValue> extra = 4;
+}
+

vendor/k8s.io/api/authentication/v1beta1/register.go

@@ -0,0 +1,51 @@
+/*
+Copyright 2015 The Kubernetes Authors.
+
+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 v1beta1
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+// GroupName is the group name use in this package
+const GroupName = "authentication.k8s.io"
+
+// SchemeGroupVersion is group version used to register these objects
+var SchemeGroupVersion = schema.GroupVersion{Group: GroupName, Version: "v1beta1"}
+
+// Resource takes an unqualified resource and returns a Group qualified GroupResource
+func Resource(resource string) schema.GroupResource {
+	return SchemeGroupVersion.WithResource(resource).GroupResource()
+}
+
+var (
+	// TODO: move SchemeBuilder with zz_generated.deepcopy.go to k8s.io/api.
+	// localSchemeBuilder and AddToScheme will stay in k8s.io/kubernetes.
+	SchemeBuilder      = runtime.NewSchemeBuilder(addKnownTypes)
+	localSchemeBuilder = &SchemeBuilder
+	AddToScheme        = localSchemeBuilder.AddToScheme
+)
+
+// Adds the list of known types to the given scheme.
+func addKnownTypes(scheme *runtime.Scheme) error {
+	scheme.AddKnownTypes(SchemeGroupVersion,
+		&TokenReview{},
+	)
+	metav1.AddToGroupVersion(scheme, SchemeGroupVersion)
+	return nil
+}

vendor/k8s.io/api/authentication/v1beta1/types.go

@@ -0,0 +1,92 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+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 v1beta1
+
+import (
+	"fmt"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// +genclient
+// +genclient:nonNamespaced
+// +genclient:noVerbs
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
+
+// TokenReview attempts to authenticate a token to a known user.
+// Note: TokenReview requests may be cached by the webhook token authenticator
+// plugin in the kube-apiserver.
+type TokenReview struct {
+	metav1.TypeMeta `json:",inline"`
+	// +optional
+	metav1.ObjectMeta `json:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`
+
+	// Spec holds information about the request being evaluated
+	Spec TokenReviewSpec `json:"spec" protobuf:"bytes,2,opt,name=spec"`
+
+	// Status is filled in by the server and indicates whether the request can be authenticated.
+	// +optional
+	Status TokenReviewStatus `json:"status,omitempty" protobuf:"bytes,3,opt,name=status"`
+}
+
+// TokenReviewSpec is a description of the token authentication request.
+type TokenReviewSpec struct {
+	// Token is the opaque bearer token.
+	// +optional
+	Token string `json:"token,omitempty" protobuf:"bytes,1,opt,name=token"`
+}
+
+// TokenReviewStatus is the result of the token authentication request.
+type TokenReviewStatus struct {
+	// Authenticated indicates that the token was associated with a known user.
+	// +optional
+	Authenticated bool `json:"authenticated,omitempty" protobuf:"varint,1,opt,name=authenticated"`
+	// User is the UserInfo associated with the provided token.
+	// +optional
+	User UserInfo `json:"user,omitempty" protobuf:"bytes,2,opt,name=user"`
+	// Error indicates that the token couldn't be checked
+	// +optional
+	Error string `json:"error,omitempty" protobuf:"bytes,3,opt,name=error"`
+}
+
+// UserInfo holds the information about the user needed to implement the
+// user.Info interface.
+type UserInfo struct {
+	// The name that uniquely identifies this user among all active users.
+	// +optional
+	Username string `json:"username,omitempty" protobuf:"bytes,1,opt,name=username"`
+	// A unique value that identifies this user across time. If this user is
+	// deleted and another user by the same name is added, they will have
+	// different UIDs.
+	// +optional
+	UID string `json:"uid,omitempty" protobuf:"bytes,2,opt,name=uid"`
+	// The names of groups this user is a part of.
+	// +optional
+	Groups []string `json:"groups,omitempty" protobuf:"bytes,3,rep,name=groups"`
+	// Any additional information provided by the authenticator.
+	// +optional
+	Extra map[string]ExtraValue `json:"extra,omitempty" protobuf:"bytes,4,rep,name=extra"`
+}
+
+// ExtraValue masks the value so protobuf can generate
+// +protobuf.nullable=true
+// +protobuf.options.(gogoproto.goproto_stringer)=false
+type ExtraValue []string
+
+func (t ExtraValue) String() string {
+	return fmt.Sprintf("%v", []string(t))
+}

vendor/k8s.io/api/authentication/v1beta1/types_swagger_doc_generated.go

@@ -0,0 +1,72 @@
+/*
+Copyright The Kubernetes Authors.
+
+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 v1beta1
+
+// This file contains a collection of methods that can be used from go-restful to
+// generate Swagger API documentation for its models. Please read this PR for more
+// information on the implementation: https://github.com/emicklei/go-restful/pull/215
+//
+// TODOs are ignored from the parser (e.g. TODO(andronat):... || TODO:...) if and only if
+// they are on one line! For multiple line or blocks that you want to ignore use ---.
+// Any context after a --- is ignored.
+//
+// Those methods can be generated by using hack/update-generated-swagger-docs.sh
+
+// AUTO-GENERATED FUNCTIONS START HERE. DO NOT EDIT.
+var map_TokenReview = map[string]string{
+	"":       "TokenReview attempts to authenticate a token to a known user. Note: TokenReview requests may be cached by the webhook token authenticator plugin in the kube-apiserver.",
+	"spec":   "Spec holds information about the request being evaluated",
+	"status": "Status is filled in by the server and indicates whether the request can be authenticated.",
+}
+
+func (TokenReview) SwaggerDoc() map[string]string {
+	return map_TokenReview
+}
+
+var map_TokenReviewSpec = map[string]string{
+	"":      "TokenReviewSpec is a description of the token authentication request.",
+	"token": "Token is the opaque bearer token.",
+}
+
+func (TokenReviewSpec) SwaggerDoc() map[string]string {
+	return map_TokenReviewSpec
+}
+
+var map_TokenReviewStatus = map[string]string{
+	"":              "TokenReviewStatus is the result of the token authentication request.",
+	"authenticated": "Authenticated indicates that the token was associated with a known user.",
+	"user":          "User is the UserInfo associated with the provided token.",
+	"error":         "Error indicates that the token couldn't be checked",
+}
+
+func (TokenReviewStatus) SwaggerDoc() map[string]string {
+	return map_TokenReviewStatus
+}
+
+var map_UserInfo = map[string]string{
+	"":         "UserInfo holds the information about the user needed to implement the user.Info interface.",
+	"username": "The name that uniquely identifies this user among all active users.",
+	"uid":      "A unique value that identifies this user across time. If this user is deleted and another user by the same name is added, they will have different UIDs.",
+	"groups":   "The names of groups this user is a part of.",
+	"extra":    "Any additional information provided by the authenticator.",
+}
+
+func (UserInfo) SwaggerDoc() map[string]string {
+	return map_UserInfo
+}
+
+// AUTO-GENERATED FUNCTIONS END HERE

vendor/k8s.io/api/authentication/v1beta1/zz_generated.deepcopy.go

@@ -0,0 +1,139 @@
+// +build !ignore_autogenerated
+
+/*
+Copyright The Kubernetes Authors.
+
+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.
+*/
+
+// Code generated by deepcopy-gen. DO NOT EDIT.
+
+package v1beta1
+
+import (
+	runtime "k8s.io/apimachinery/pkg/runtime"
+)
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in ExtraValue) DeepCopyInto(out *ExtraValue) {
+	{
+		in := &in
+		*out = make(ExtraValue, len(*in))
+		copy(*out, *in)
+		return
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new ExtraValue.
+func (in ExtraValue) DeepCopy() ExtraValue {
+	if in == nil {
+		return nil
+	}
+	out := new(ExtraValue)
+	in.DeepCopyInto(out)
+	return *out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TokenReview) DeepCopyInto(out *TokenReview) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	in.ObjectMeta.DeepCopyInto(&out.ObjectMeta)
+	out.Spec = in.Spec
+	in.Status.DeepCopyInto(&out.Status)
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TokenReview.
+func (in *TokenReview) DeepCopy() *TokenReview {
+	if in == nil {
+		return nil
+	}
+	out := new(TokenReview)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *TokenReview) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TokenReviewSpec) DeepCopyInto(out *TokenReviewSpec) {
+	*out = *in
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TokenReviewSpec.
+func (in *TokenReviewSpec) DeepCopy() *TokenReviewSpec {
+	if in == nil {
+		return nil
+	}
+	out := new(TokenReviewSpec)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *TokenReviewStatus) DeepCopyInto(out *TokenReviewStatus) {
+	*out = *in
+	in.User.DeepCopyInto(&out.User)
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new TokenReviewStatus.
+func (in *TokenReviewStatus) DeepCopy() *TokenReviewStatus {
+	if in == nil {
+		return nil
+	}
+	out := new(TokenReviewStatus)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *UserInfo) DeepCopyInto(out *UserInfo) {
+	*out = *in
+	if in.Groups != nil {
+		in, out := &in.Groups, &out.Groups
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	if in.Extra != nil {
+		in, out := &in.Extra, &out.Extra
+		*out = make(map[string]ExtraValue, len(*in))
+		for key, val := range *in {
+			if val == nil {
+				(*out)[key] = nil
+			} else {
+				(*out)[key] = make([]string, len(val))
+				copy((*out)[key], val)
+			}
+		}
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new UserInfo.
+func (in *UserInfo) DeepCopy() *UserInfo {
+	if in == nil {
+		return nil
+	}
+	out := new(UserInfo)
+	in.DeepCopyInto(out)
+	return out
+}