Introduce APIs to support multiple ClusterCIDRs (#108290)

* Introduce networking/v1alpha1 api, ClusterCIDRConfig type

Introduce networking/v1alpha1 api group.

Add `ClusterCIDRConfig` type to networking/v1alpha1 api group, this type
will enable the NodeIPAM controller to support multiple ClusterCIDRs.

* Change ClusterCIDRConfig.NodeSelector type in api

* Fix review comments for API

* Update ClusterCIDRConfig API Spec

Introduce PerNodeHostBits field, remove PerNodeMaskSize

Kubernetes-commit: b9792a9daef4d978c5c30b6d10cbcdfa77a9b6ac

go.mod

@@ -7,7 +7,7 @@ go 1.16
 require (
  github.com/gogo/protobuf v1.3.2
  github.com/stretchr/testify v1.7.0
- k8s.io/apimachinery v0.0.0-20220330050810-00f071187c12
+ k8s.io/apimachinery v0.0.0-20220330050810-6550efdb7444
 )
 
-replace k8s.io/apimachinery => k8s.io/apimachinery v0.0.0-20220330050810-00f071187c12
+replace k8s.io/apimachinery => k8s.io/apimachinery v0.0.0-20220330050810-6550efdb7444

go.sum

@@ -221,8 +221,8 @@ gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-k8s.io/apimachinery v0.0.0-20220330050810-00f071187c12 h1:+Cp1h0ojFtOluw7Bgiju2A/LqoWzeYyaB+sY/YSflwE=
-k8s.io/apimachinery v0.0.0-20220330050810-00f071187c12/go.mod h1:82Bi4sCzVBdpYjyI4jY6aHX+YCUchUIrZrXKedjd2UM=
+k8s.io/apimachinery v0.0.0-20220330050810-6550efdb7444 h1:whQmS3GtF822OUer+LPJnMFKn6kPfuJOCM/3xUuATIY=
+k8s.io/apimachinery v0.0.0-20220330050810-6550efdb7444/go.mod h1:82Bi4sCzVBdpYjyI4jY6aHX+YCUchUIrZrXKedjd2UM=
 k8s.io/gengo v0.0.0-20210813121822-485abfe95c7c/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
 k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
 k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=

networking/v1alpha1/doc.go

@@ -0,0 +1,23 @@
+/*
+Copyright 2022 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
+// +k8s:protobuf-gen=package
+// +k8s:openapi-gen=true
+// +k8s:prerelease-lifecycle-gen=true
+// +groupName=networking.k8s.io
+
+package v1alpha1 // import "k8s.io/api/networking/v1alpha1"