mirror of
https://github.com/k3s-io/kubernetes.git
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539 lines
17 KiB
Go
539 lines
17 KiB
Go
/*
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Copyright 2016 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 ipam
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import (
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"net"
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"testing"
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"time"
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"k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/client-go/informers"
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coreinformers "k8s.io/client-go/informers/core/v1"
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"k8s.io/client-go/kubernetes/fake"
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"k8s.io/kubernetes/pkg/controller"
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"k8s.io/kubernetes/pkg/controller/testutil"
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)
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const (
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nodePollInterval = 100 * time.Millisecond
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)
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var alwaysReady = func() bool { return true }
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func waitForUpdatedNodeWithTimeout(nodeHandler *testutil.FakeNodeHandler, number int, timeout time.Duration) error {
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return wait.Poll(nodePollInterval, timeout, func() (bool, error) {
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if len(nodeHandler.GetUpdatedNodesCopy()) >= number {
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return true, nil
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}
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return false, nil
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})
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}
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// Creates a fakeNodeInformer using the provided fakeNodeHandler.
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func getFakeNodeInformer(fakeNodeHandler *testutil.FakeNodeHandler) coreinformers.NodeInformer {
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fakeClient := &fake.Clientset{}
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fakeInformerFactory := informers.NewSharedInformerFactory(fakeClient, controller.NoResyncPeriodFunc())
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fakeNodeInformer := fakeInformerFactory.Core().V1().Nodes()
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for _, node := range fakeNodeHandler.Existing {
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fakeNodeInformer.Informer().GetStore().Add(node)
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}
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return fakeNodeInformer
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}
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type testCase struct {
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description string
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fakeNodeHandler *testutil.FakeNodeHandler
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clusterCIDRs []*net.IPNet
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serviceCIDR *net.IPNet
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secondaryServiceCIDR *net.IPNet
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subNetMaskSize int
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// key is index of the cidr allocated
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expectedAllocatedCIDR map[int]string
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allocatedCIDRs map[int][]string
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}
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func TestAllocateOrOccupyCIDRSuccess(t *testing.T) {
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// all tests operate on a single node
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testCases := []testCase{
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{
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description: "When there's no ServiceCIDR return first CIDR in range",
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fakeNodeHandler: &testutil.FakeNodeHandler{
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Existing: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node0",
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},
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},
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},
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Clientset: fake.NewSimpleClientset(),
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},
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clusterCIDRs: func() []*net.IPNet {
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_, clusterCIDR, _ := net.ParseCIDR("127.123.234.0/24")
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return []*net.IPNet{clusterCIDR}
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}(),
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serviceCIDR: nil,
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secondaryServiceCIDR: nil,
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subNetMaskSize: 30,
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expectedAllocatedCIDR: map[int]string{
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0: "127.123.234.0/30",
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},
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},
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{
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description: "Correctly filter out ServiceCIDR",
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fakeNodeHandler: &testutil.FakeNodeHandler{
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Existing: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node0",
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},
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},
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},
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Clientset: fake.NewSimpleClientset(),
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},
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clusterCIDRs: func() []*net.IPNet {
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_, clusterCIDR, _ := net.ParseCIDR("127.123.234.0/24")
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return []*net.IPNet{clusterCIDR}
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}(),
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serviceCIDR: func() *net.IPNet {
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_, serviceCIDR, _ := net.ParseCIDR("127.123.234.0/26")
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return serviceCIDR
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}(),
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secondaryServiceCIDR: nil,
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subNetMaskSize: 30,
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// it should return first /30 CIDR after service range
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expectedAllocatedCIDR: map[int]string{
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0: "127.123.234.64/30",
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},
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},
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{
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description: "Correctly ignore already allocated CIDRs",
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fakeNodeHandler: &testutil.FakeNodeHandler{
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Existing: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node0",
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},
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},
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},
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Clientset: fake.NewSimpleClientset(),
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},
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clusterCIDRs: func() []*net.IPNet {
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_, clusterCIDR, _ := net.ParseCIDR("127.123.234.0/24")
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return []*net.IPNet{clusterCIDR}
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}(),
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serviceCIDR: func() *net.IPNet {
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_, serviceCIDR, _ := net.ParseCIDR("127.123.234.0/26")
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return serviceCIDR
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}(),
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secondaryServiceCIDR: nil,
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subNetMaskSize: 30,
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allocatedCIDRs: map[int][]string{
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0: {"127.123.234.64/30", "127.123.234.68/30", "127.123.234.72/30", "127.123.234.80/30"},
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},
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expectedAllocatedCIDR: map[int]string{
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0: "127.123.234.76/30",
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},
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},
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{
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description: "Dualstack CIDRs v4,v6",
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fakeNodeHandler: &testutil.FakeNodeHandler{
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Existing: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node0",
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},
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},
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},
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Clientset: fake.NewSimpleClientset(),
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},
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clusterCIDRs: func() []*net.IPNet {
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_, clusterCIDRv4, _ := net.ParseCIDR("127.123.234.0/8")
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_, clusterCIDRv6, _ := net.ParseCIDR("ace:cab:deca::/8")
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return []*net.IPNet{clusterCIDRv4, clusterCIDRv6}
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}(),
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serviceCIDR: func() *net.IPNet {
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_, serviceCIDR, _ := net.ParseCIDR("127.123.234.0/26")
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return serviceCIDR
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}(),
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secondaryServiceCIDR: nil,
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},
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{
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description: "Dualstack CIDRs v6,v4",
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fakeNodeHandler: &testutil.FakeNodeHandler{
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Existing: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node0",
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},
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},
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},
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Clientset: fake.NewSimpleClientset(),
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},
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clusterCIDRs: func() []*net.IPNet {
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_, clusterCIDRv4, _ := net.ParseCIDR("127.123.234.0/8")
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_, clusterCIDRv6, _ := net.ParseCIDR("ace:cab:deca::/8")
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return []*net.IPNet{clusterCIDRv6, clusterCIDRv4}
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}(),
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serviceCIDR: func() *net.IPNet {
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_, serviceCIDR, _ := net.ParseCIDR("127.123.234.0/26")
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return serviceCIDR
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}(),
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secondaryServiceCIDR: nil,
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},
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{
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description: "Dualstack CIDRs, more than two",
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fakeNodeHandler: &testutil.FakeNodeHandler{
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Existing: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node0",
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},
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},
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},
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Clientset: fake.NewSimpleClientset(),
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},
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clusterCIDRs: func() []*net.IPNet {
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_, clusterCIDRv4, _ := net.ParseCIDR("127.123.234.0/8")
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_, clusterCIDRv6, _ := net.ParseCIDR("ace:cab:deca::/8")
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_, clusterCIDRv4_2, _ := net.ParseCIDR("10.0.0.0/8")
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return []*net.IPNet{clusterCIDRv4, clusterCIDRv6, clusterCIDRv4_2}
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}(),
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serviceCIDR: func() *net.IPNet {
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_, serviceCIDR, _ := net.ParseCIDR("127.123.234.0/26")
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return serviceCIDR
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}(),
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secondaryServiceCIDR: nil,
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},
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}
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// test function
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testFunc := func(tc testCase) {
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// Initialize the range allocator.
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allocator, err := NewCIDRRangeAllocator(tc.fakeNodeHandler, getFakeNodeInformer(tc.fakeNodeHandler), tc.clusterCIDRs, tc.serviceCIDR, tc.secondaryServiceCIDR, tc.subNetMaskSize, nil)
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if err != nil {
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t.Errorf("%v: failed to create CIDRRangeAllocator with error %v", tc.description, err)
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return
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}
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rangeAllocator, ok := allocator.(*rangeAllocator)
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if !ok {
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t.Logf("%v: found non-default implementation of CIDRAllocator, skipping white-box test...", tc.description)
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return
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}
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rangeAllocator.nodesSynced = alwaysReady
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rangeAllocator.recorder = testutil.NewFakeRecorder()
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go allocator.Run(wait.NeverStop)
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// this is a bit of white box testing
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// pre allocate the cidrs as per the test
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for idx, allocatedList := range tc.allocatedCIDRs {
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for _, allocated := range allocatedList {
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_, cidr, err := net.ParseCIDR(allocated)
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if err != nil {
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t.Fatalf("%v: unexpected error when parsing CIDR %v: %v", tc.description, allocated, err)
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}
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if err = rangeAllocator.cidrSets[idx].Occupy(cidr); err != nil {
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t.Fatalf("%v: unexpected error when occupying CIDR %v: %v", tc.description, allocated, err)
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}
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}
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if err := allocator.AllocateOrOccupyCIDR(tc.fakeNodeHandler.Existing[0]); err != nil {
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t.Errorf("%v: unexpected error in AllocateOrOccupyCIDR: %v", tc.description, err)
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}
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if err := waitForUpdatedNodeWithTimeout(tc.fakeNodeHandler, 1, wait.ForeverTestTimeout); err != nil {
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t.Fatalf("%v: timeout while waiting for Node update: %v", tc.description, err)
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}
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}
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if len(tc.expectedAllocatedCIDR) == 0 {
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// nothing further expected
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return
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}
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for _, updatedNode := range tc.fakeNodeHandler.GetUpdatedNodesCopy() {
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if len(updatedNode.Spec.PodCIDRs) == 0 {
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continue // not assigned yet
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}
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//match
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for podCIDRIdx, expectedPodCIDR := range tc.expectedAllocatedCIDR {
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if updatedNode.Spec.PodCIDRs[podCIDRIdx] != expectedPodCIDR {
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t.Errorf("%v: Unable to find allocated CIDR %v, found updated Nodes with CIDRs: %v", tc.description, expectedPodCIDR, updatedNode.Spec.PodCIDRs)
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break
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}
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}
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}
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}
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// run the test cases
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for _, tc := range testCases {
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testFunc(tc)
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}
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}
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func TestAllocateOrOccupyCIDRFailure(t *testing.T) {
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testCases := []testCase{
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{
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description: "When there's no ServiceCIDR return first CIDR in range",
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fakeNodeHandler: &testutil.FakeNodeHandler{
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Existing: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node0",
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},
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},
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},
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Clientset: fake.NewSimpleClientset(),
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},
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clusterCIDRs: func() []*net.IPNet {
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_, clusterCIDR, _ := net.ParseCIDR("127.123.234.0/28")
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return []*net.IPNet{clusterCIDR}
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}(),
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serviceCIDR: nil,
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secondaryServiceCIDR: nil,
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subNetMaskSize: 30,
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allocatedCIDRs: map[int][]string{
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0: {"127.123.234.0/30", "127.123.234.4/30", "127.123.234.8/30", "127.123.234.12/30"},
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},
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},
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}
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testFunc := func(tc testCase) {
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// Initialize the range allocator.
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allocator, err := NewCIDRRangeAllocator(tc.fakeNodeHandler, getFakeNodeInformer(tc.fakeNodeHandler), tc.clusterCIDRs, tc.serviceCIDR, tc.secondaryServiceCIDR, tc.subNetMaskSize, nil)
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if err != nil {
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t.Logf("%v: failed to create CIDRRangeAllocator with error %v", tc.description, err)
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}
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rangeAllocator, ok := allocator.(*rangeAllocator)
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if !ok {
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t.Logf("%v: found non-default implementation of CIDRAllocator, skipping white-box test...", tc.description)
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return
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}
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rangeAllocator.nodesSynced = alwaysReady
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rangeAllocator.recorder = testutil.NewFakeRecorder()
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go allocator.Run(wait.NeverStop)
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// this is a bit of white box testing
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for setIdx, allocatedList := range tc.allocatedCIDRs {
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for _, allocated := range allocatedList {
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_, cidr, err := net.ParseCIDR(allocated)
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if err != nil {
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t.Fatalf("%v: unexpected error when parsing CIDR %v: %v", tc.description, cidr, err)
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}
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err = rangeAllocator.cidrSets[setIdx].Occupy(cidr)
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if err != nil {
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t.Fatalf("%v: unexpected error when occupying CIDR %v: %v", tc.description, cidr, err)
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}
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}
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}
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if err := allocator.AllocateOrOccupyCIDR(tc.fakeNodeHandler.Existing[0]); err == nil {
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t.Errorf("%v: unexpected success in AllocateOrOccupyCIDR: %v", tc.description, err)
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}
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// We don't expect any updates, so just sleep for some time
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time.Sleep(time.Second)
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if len(tc.fakeNodeHandler.GetUpdatedNodesCopy()) != 0 {
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t.Fatalf("%v: unexpected update of nodes: %v", tc.description, tc.fakeNodeHandler.GetUpdatedNodesCopy())
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}
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if len(tc.expectedAllocatedCIDR) == 0 {
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// nothing further expected
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return
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}
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for _, updatedNode := range tc.fakeNodeHandler.GetUpdatedNodesCopy() {
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if len(updatedNode.Spec.PodCIDRs) == 0 {
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continue // not assigned yet
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}
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//match
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for podCIDRIdx, expectedPodCIDR := range tc.expectedAllocatedCIDR {
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if updatedNode.Spec.PodCIDRs[podCIDRIdx] == expectedPodCIDR {
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t.Errorf("%v: found cidr %v that should not be allocated on node with CIDRs:%v", tc.description, expectedPodCIDR, updatedNode.Spec.PodCIDRs)
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break
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}
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}
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}
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}
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for _, tc := range testCases {
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testFunc(tc)
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}
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}
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type releaseTestCase struct {
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description string
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fakeNodeHandler *testutil.FakeNodeHandler
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clusterCIDRs []*net.IPNet
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serviceCIDR *net.IPNet
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secondaryServiceCIDR *net.IPNet
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subNetMaskSize int
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expectedAllocatedCIDRFirstRound map[int]string
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expectedAllocatedCIDRSecondRound map[int]string
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allocatedCIDRs map[int][]string
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cidrsToRelease [][]string
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}
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func TestReleaseCIDRSuccess(t *testing.T) {
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testCases := []releaseTestCase{
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{
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description: "Correctly release preallocated CIDR",
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fakeNodeHandler: &testutil.FakeNodeHandler{
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Existing: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node0",
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},
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},
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},
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Clientset: fake.NewSimpleClientset(),
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},
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clusterCIDRs: func() []*net.IPNet {
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_, clusterCIDR, _ := net.ParseCIDR("127.123.234.0/28")
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return []*net.IPNet{clusterCIDR}
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}(),
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serviceCIDR: nil,
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secondaryServiceCIDR: nil,
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subNetMaskSize: 30,
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allocatedCIDRs: map[int][]string{
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0: {"127.123.234.0/30", "127.123.234.4/30", "127.123.234.8/30", "127.123.234.12/30"},
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},
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expectedAllocatedCIDRFirstRound: nil,
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cidrsToRelease: [][]string{
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{"127.123.234.4/30"},
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},
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expectedAllocatedCIDRSecondRound: map[int]string{
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0: "127.123.234.4/30",
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},
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},
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{
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description: "Correctly recycle CIDR",
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fakeNodeHandler: &testutil.FakeNodeHandler{
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Existing: []*v1.Node{
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{
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ObjectMeta: metav1.ObjectMeta{
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Name: "node0",
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},
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},
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},
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Clientset: fake.NewSimpleClientset(),
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},
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clusterCIDRs: func() []*net.IPNet {
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_, clusterCIDR, _ := net.ParseCIDR("127.123.234.0/28")
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return []*net.IPNet{clusterCIDR}
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}(),
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serviceCIDR: nil,
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secondaryServiceCIDR: nil,
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subNetMaskSize: 30,
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allocatedCIDRs: map[int][]string{
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0: {"127.123.234.4/30", "127.123.234.8/30", "127.123.234.12/30"},
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},
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expectedAllocatedCIDRFirstRound: map[int]string{
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0: "127.123.234.0/30",
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},
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cidrsToRelease: [][]string{
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{"127.123.234.0/30"},
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},
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expectedAllocatedCIDRSecondRound: map[int]string{
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0: "127.123.234.0/30",
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},
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},
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}
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testFunc := func(tc releaseTestCase) {
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// Initialize the range allocator.
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allocator, _ := NewCIDRRangeAllocator(tc.fakeNodeHandler, getFakeNodeInformer(tc.fakeNodeHandler), tc.clusterCIDRs, tc.serviceCIDR, tc.secondaryServiceCIDR, tc.subNetMaskSize, nil)
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rangeAllocator, ok := allocator.(*rangeAllocator)
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if !ok {
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t.Logf("%v: found non-default implementation of CIDRAllocator, skipping white-box test...", tc.description)
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return
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}
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rangeAllocator.nodesSynced = alwaysReady
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rangeAllocator.recorder = testutil.NewFakeRecorder()
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go allocator.Run(wait.NeverStop)
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// this is a bit of white box testing
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for setIdx, allocatedList := range tc.allocatedCIDRs {
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for _, allocated := range allocatedList {
|
|
_, cidr, err := net.ParseCIDR(allocated)
|
|
if err != nil {
|
|
t.Fatalf("%v: unexpected error when parsing CIDR %v: %v", tc.description, allocated, err)
|
|
}
|
|
err = rangeAllocator.cidrSets[setIdx].Occupy(cidr)
|
|
if err != nil {
|
|
t.Fatalf("%v: unexpected error when occupying CIDR %v: %v", tc.description, allocated, err)
|
|
}
|
|
}
|
|
}
|
|
|
|
err := allocator.AllocateOrOccupyCIDR(tc.fakeNodeHandler.Existing[0])
|
|
if len(tc.expectedAllocatedCIDRFirstRound) != 0 {
|
|
if err != nil {
|
|
t.Fatalf("%v: unexpected error in AllocateOrOccupyCIDR: %v", tc.description, err)
|
|
}
|
|
if err := waitForUpdatedNodeWithTimeout(tc.fakeNodeHandler, 1, wait.ForeverTestTimeout); err != nil {
|
|
t.Fatalf("%v: timeout while waiting for Node update: %v", tc.description, err)
|
|
}
|
|
} else {
|
|
if err == nil {
|
|
t.Fatalf("%v: unexpected success in AllocateOrOccupyCIDR: %v", tc.description, err)
|
|
}
|
|
// We don't expect any updates here
|
|
time.Sleep(time.Second)
|
|
if len(tc.fakeNodeHandler.GetUpdatedNodesCopy()) != 0 {
|
|
t.Fatalf("%v: unexpected update of nodes: %v", tc.description, tc.fakeNodeHandler.GetUpdatedNodesCopy())
|
|
}
|
|
}
|
|
for _, cidrToRelease := range tc.cidrsToRelease {
|
|
nodeToRelease := v1.Node{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: "node0",
|
|
},
|
|
}
|
|
nodeToRelease.Spec.PodCIDRs = cidrToRelease
|
|
err = allocator.ReleaseCIDR(&nodeToRelease)
|
|
if err != nil {
|
|
t.Fatalf("%v: unexpected error in ReleaseCIDR: %v", tc.description, err)
|
|
}
|
|
}
|
|
if err = allocator.AllocateOrOccupyCIDR(tc.fakeNodeHandler.Existing[0]); err != nil {
|
|
t.Fatalf("%v: unexpected error in AllocateOrOccupyCIDR: %v", tc.description, err)
|
|
}
|
|
if err := waitForUpdatedNodeWithTimeout(tc.fakeNodeHandler, 1, wait.ForeverTestTimeout); err != nil {
|
|
t.Fatalf("%v: timeout while waiting for Node update: %v", tc.description, err)
|
|
}
|
|
|
|
if len(tc.expectedAllocatedCIDRSecondRound) == 0 {
|
|
// nothing further expected
|
|
return
|
|
}
|
|
for _, updatedNode := range tc.fakeNodeHandler.GetUpdatedNodesCopy() {
|
|
if len(updatedNode.Spec.PodCIDRs) == 0 {
|
|
continue // not assigned yet
|
|
}
|
|
//match
|
|
for podCIDRIdx, expectedPodCIDR := range tc.expectedAllocatedCIDRSecondRound {
|
|
if updatedNode.Spec.PodCIDRs[podCIDRIdx] != expectedPodCIDR {
|
|
t.Errorf("%v: found cidr %v that should not be allocated on node with CIDRs:%v", tc.description, expectedPodCIDR, updatedNode.Spec.PodCIDRs)
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
for _, tc := range testCases {
|
|
testFunc(tc)
|
|
}
|
|
}
|