*: add peer VPN support

This commit adds support for defining arbitrary peers that should have
access to the VPN. In k8s, this is accomplished using the new Peer CRD.

pkg/k8s/informers/kilo/interface.go

@@ -0,0 +1,44 @@
+// Copyright 2019 the Kilo 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 informer-gen. DO NOT EDIT.
+
+package kilo
+
+import (
+	internalinterfaces "github.com/squat/kilo/pkg/k8s/informers/internalinterfaces"
+	v1alpha1 "github.com/squat/kilo/pkg/k8s/informers/kilo/v1alpha1"
+)
+
+// Interface provides access to each of this group's versions.
+type Interface interface {
+	// V1alpha1 provides access to shared informers for resources in V1alpha1.
+	V1alpha1() v1alpha1.Interface
+}
+
+type group struct {
+	factory          internalinterfaces.SharedInformerFactory
+	namespace        string
+	tweakListOptions internalinterfaces.TweakListOptionsFunc
+}
+
+// New returns a new Interface.
+func New(f internalinterfaces.SharedInformerFactory, namespace string, tweakListOptions internalinterfaces.TweakListOptionsFunc) Interface {
+	return &group{factory: f, namespace: namespace, tweakListOptions: tweakListOptions}
+}
+
+// V1alpha1 returns a new v1alpha1.Interface.
+func (g *group) V1alpha1() v1alpha1.Interface {
+	return v1alpha1.New(g.factory, g.namespace, g.tweakListOptions)
+}

pkg/k8s/informers/kilo/v1alpha1/interface.go

@@ -0,0 +1,43 @@
+// Copyright 2019 the Kilo 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 informer-gen. DO NOT EDIT.
+
+package v1alpha1
+
+import (
+	internalinterfaces "github.com/squat/kilo/pkg/k8s/informers/internalinterfaces"
+)
+
+// Interface provides access to all the informers in this group version.
+type Interface interface {
+	// Peers returns a PeerInformer.
+	Peers() PeerInformer
+}
+
+type version struct {
+	factory          internalinterfaces.SharedInformerFactory
+	namespace        string
+	tweakListOptions internalinterfaces.TweakListOptionsFunc
+}
+
+// New returns a new Interface.
+func New(f internalinterfaces.SharedInformerFactory, namespace string, tweakListOptions internalinterfaces.TweakListOptionsFunc) Interface {
+	return &version{factory: f, namespace: namespace, tweakListOptions: tweakListOptions}
+}
+
+// Peers returns a PeerInformer.
+func (v *version) Peers() PeerInformer {
+	return &peerInformer{factory: v.factory, tweakListOptions: v.tweakListOptions}
+}

pkg/k8s/informers/kilo/v1alpha1/peer.go

@@ -0,0 +1,86 @@
+// Copyright 2019 the Kilo 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 informer-gen. DO NOT EDIT.
+
+package v1alpha1
+
+import (
+	time "time"
+
+	kilov1alpha1 "github.com/squat/kilo/pkg/k8s/apis/kilo/v1alpha1"
+	versioned "github.com/squat/kilo/pkg/k8s/clientset/versioned"
+	internalinterfaces "github.com/squat/kilo/pkg/k8s/informers/internalinterfaces"
+	v1alpha1 "github.com/squat/kilo/pkg/k8s/listers/kilo/v1alpha1"
+	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	runtime "k8s.io/apimachinery/pkg/runtime"
+	watch "k8s.io/apimachinery/pkg/watch"
+	cache "k8s.io/client-go/tools/cache"
+)
+
+// PeerInformer provides access to a shared informer and lister for
+// Peers.
+type PeerInformer interface {
+	Informer() cache.SharedIndexInformer
+	Lister() v1alpha1.PeerLister
+}
+
+type peerInformer struct {
+	factory          internalinterfaces.SharedInformerFactory
+	tweakListOptions internalinterfaces.TweakListOptionsFunc
+}
+
+// NewPeerInformer constructs a new informer for Peer type.
+// Always prefer using an informer factory to get a shared informer instead of getting an independent
+// one. This reduces memory footprint and number of connections to the server.
+func NewPeerInformer(client versioned.Interface, resyncPeriod time.Duration, indexers cache.Indexers) cache.SharedIndexInformer {
+	return NewFilteredPeerInformer(client, resyncPeriod, indexers, nil)
+}
+
+// NewFilteredPeerInformer constructs a new informer for Peer type.
+// Always prefer using an informer factory to get a shared informer instead of getting an independent
+// one. This reduces memory footprint and number of connections to the server.
+func NewFilteredPeerInformer(client versioned.Interface, resyncPeriod time.Duration, indexers cache.Indexers, tweakListOptions internalinterfaces.TweakListOptionsFunc) cache.SharedIndexInformer {
+	return cache.NewSharedIndexInformer(
+		&cache.ListWatch{
+			ListFunc: func(options v1.ListOptions) (runtime.Object, error) {
+				if tweakListOptions != nil {
+					tweakListOptions(&options)
+				}
+				return client.KiloV1alpha1().Peers().List(options)
+			},
+			WatchFunc: func(options v1.ListOptions) (watch.Interface, error) {
+				if tweakListOptions != nil {
+					tweakListOptions(&options)
+				}
+				return client.KiloV1alpha1().Peers().Watch(options)
+			},
+		},
+		&kilov1alpha1.Peer{},
+		resyncPeriod,
+		indexers,
+	)
+}
+
+func (f *peerInformer) defaultInformer(client versioned.Interface, resyncPeriod time.Duration) cache.SharedIndexInformer {
+	return NewFilteredPeerInformer(client, resyncPeriod, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc}, f.tweakListOptions)
+}
+
+func (f *peerInformer) Informer() cache.SharedIndexInformer {
+	return f.factory.InformerFor(&kilov1alpha1.Peer{}, f.defaultInformer)
+}
+
+func (f *peerInformer) Lister() v1alpha1.PeerLister {
+	return v1alpha1.NewPeerLister(f.Informer().GetIndexer())
+}