mirror of https://github.com/k3s-io/k3s
397 lines
12 KiB
Go
397 lines
12 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 node
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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/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/fake"
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"k8s.io/kubernetes/pkg/util/wait"
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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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func waitForUpdatedNodeWithTimeout(nodeHandler *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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func TestAllocateOrOccupyCIDRSuccess(t *testing.T) {
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testCases := []struct {
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description string
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fakeNodeHandler *FakeNodeHandler
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clusterCIDR *net.IPNet
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serviceCIDR *net.IPNet
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subNetMaskSize int
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expectedAllocatedCIDR string
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allocatedCIDRs []string
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}{
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{
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description: "When there's no ServiceCIDR return first CIDR in range",
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fakeNodeHandler: &FakeNodeHandler{
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Existing: []*api.Node{
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{
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ObjectMeta: api.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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clusterCIDR: func() *net.IPNet {
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_, clusterCIDR, _ := net.ParseCIDR("127.123.234.0/24")
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return clusterCIDR
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}(),
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serviceCIDR: nil,
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subNetMaskSize: 30,
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expectedAllocatedCIDR: "127.123.234.0/30",
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},
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{
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description: "Correctly filter out ServiceCIDR",
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fakeNodeHandler: &FakeNodeHandler{
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Existing: []*api.Node{
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{
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ObjectMeta: api.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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clusterCIDR: func() *net.IPNet {
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_, clusterCIDR, _ := net.ParseCIDR("127.123.234.0/24")
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return clusterCIDR
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}(),
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serviceCIDR: func() *net.IPNet {
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_, clusterCIDR, _ := net.ParseCIDR("127.123.234.0/26")
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return clusterCIDR
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}(),
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subNetMaskSize: 30,
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// it should return first /30 CIDR after service range
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expectedAllocatedCIDR: "127.123.234.64/30",
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},
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{
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description: "Correctly ignore already allocated CIDRs",
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fakeNodeHandler: &FakeNodeHandler{
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Existing: []*api.Node{
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{
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ObjectMeta: api.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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clusterCIDR: func() *net.IPNet {
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_, clusterCIDR, _ := net.ParseCIDR("127.123.234.0/24")
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return clusterCIDR
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}(),
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serviceCIDR: func() *net.IPNet {
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_, clusterCIDR, _ := net.ParseCIDR("127.123.234.0/26")
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return clusterCIDR
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}(),
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subNetMaskSize: 30,
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allocatedCIDRs: []string{"127.123.234.64/30", "127.123.234.68/30", "127.123.234.72/30", "127.123.234.80/30"},
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expectedAllocatedCIDR: "127.123.234.76/30",
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},
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}
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testFunc := func(tc struct {
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description string
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fakeNodeHandler *FakeNodeHandler
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clusterCIDR *net.IPNet
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serviceCIDR *net.IPNet
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subNetMaskSize int
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expectedAllocatedCIDR string
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allocatedCIDRs []string
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}) {
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allocator, _ := NewCIDRRangeAllocator(tc.fakeNodeHandler, tc.clusterCIDR, tc.serviceCIDR, tc.subNetMaskSize, nil)
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// this is a bit of white box testing
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for _, allocated := range tc.allocatedCIDRs {
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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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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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if err = rangeAllocator.cidrs.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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found := false
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seenCIDRs := []string{}
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for _, updatedNode := range tc.fakeNodeHandler.getUpdatedNodesCopy() {
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seenCIDRs = append(seenCIDRs, updatedNode.Spec.PodCIDR)
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if updatedNode.Spec.PodCIDR == tc.expectedAllocatedCIDR {
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found = true
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break
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}
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}
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if !found {
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t.Errorf("%v: Unable to find allocated CIDR %v, found updated Nodes with CIDRs: %v",
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tc.description, tc.expectedAllocatedCIDR, seenCIDRs)
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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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func TestAllocateOrOccupyCIDRFailure(t *testing.T) {
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testCases := []struct {
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description string
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fakeNodeHandler *FakeNodeHandler
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clusterCIDR *net.IPNet
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serviceCIDR *net.IPNet
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subNetMaskSize int
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allocatedCIDRs []string
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}{
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{
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description: "When there's no ServiceCIDR return first CIDR in range",
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fakeNodeHandler: &FakeNodeHandler{
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Existing: []*api.Node{
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{
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ObjectMeta: api.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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clusterCIDR: func() *net.IPNet {
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_, clusterCIDR, _ := net.ParseCIDR("127.123.234.0/28")
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return clusterCIDR
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}(),
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serviceCIDR: nil,
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subNetMaskSize: 30,
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allocatedCIDRs: []string{"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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testFunc := func(tc struct {
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description string
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fakeNodeHandler *FakeNodeHandler
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clusterCIDR *net.IPNet
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serviceCIDR *net.IPNet
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subNetMaskSize int
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allocatedCIDRs []string
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}) {
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allocator, _ := NewCIDRRangeAllocator(tc.fakeNodeHandler, tc.clusterCIDR, tc.serviceCIDR, tc.subNetMaskSize, nil)
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// this is a bit of white box testing
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for _, allocated := range tc.allocatedCIDRs {
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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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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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err = rangeAllocator.cidrs.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, 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 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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seenCIDRs := []string{}
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for _, updatedNode := range tc.fakeNodeHandler.getUpdatedNodesCopy() {
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if updatedNode.Spec.PodCIDR != "" {
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seenCIDRs = append(seenCIDRs, updatedNode.Spec.PodCIDR)
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}
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}
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if len(seenCIDRs) != 0 {
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t.Errorf("%v: Seen assigned CIDRs when not expected: %v",
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tc.description, seenCIDRs)
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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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func TestReleaseCIDRSuccess(t *testing.T) {
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testCases := []struct {
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description string
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fakeNodeHandler *FakeNodeHandler
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clusterCIDR *net.IPNet
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serviceCIDR *net.IPNet
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subNetMaskSize int
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expectedAllocatedCIDRFirstRound string
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expectedAllocatedCIDRSecondRound string
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allocatedCIDRs []string
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cidrsToRelease []string
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}{
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{
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description: "Correctly release preallocated CIDR",
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fakeNodeHandler: &FakeNodeHandler{
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Existing: []*api.Node{
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{
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ObjectMeta: api.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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clusterCIDR: func() *net.IPNet {
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_, clusterCIDR, _ := net.ParseCIDR("127.123.234.0/28")
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return clusterCIDR
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}(),
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serviceCIDR: nil,
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subNetMaskSize: 30,
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allocatedCIDRs: []string{"127.123.234.0/30", "127.123.234.4/30", "127.123.234.8/30", "127.123.234.12/30"},
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expectedAllocatedCIDRFirstRound: "",
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cidrsToRelease: []string{"127.123.234.4/30"},
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expectedAllocatedCIDRSecondRound: "127.123.234.4/30",
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},
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{
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description: "Correctly recycle CIDR",
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fakeNodeHandler: &FakeNodeHandler{
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Existing: []*api.Node{
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{
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ObjectMeta: api.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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clusterCIDR: func() *net.IPNet {
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_, clusterCIDR, _ := net.ParseCIDR("127.123.234.0/28")
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return clusterCIDR
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}(),
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serviceCIDR: nil,
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subNetMaskSize: 30,
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expectedAllocatedCIDRFirstRound: "127.123.234.0/30",
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cidrsToRelease: []string{"127.123.234.0/30"},
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expectedAllocatedCIDRSecondRound: "127.123.234.0/30",
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},
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}
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testFunc := func(tc struct {
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description string
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fakeNodeHandler *FakeNodeHandler
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clusterCIDR *net.IPNet
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serviceCIDR *net.IPNet
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subNetMaskSize int
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expectedAllocatedCIDRFirstRound string
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expectedAllocatedCIDRSecondRound string
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allocatedCIDRs []string
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cidrsToRelease []string
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}) {
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allocator, _ := NewCIDRRangeAllocator(tc.fakeNodeHandler, tc.clusterCIDR, tc.serviceCIDR, tc.subNetMaskSize, nil)
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// this is a bit of white box testing
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for _, allocated := range tc.allocatedCIDRs {
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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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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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err = rangeAllocator.cidrs.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, allocated, err)
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}
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}
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err := allocator.AllocateOrOccupyCIDR(tc.fakeNodeHandler.Existing[0])
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if tc.expectedAllocatedCIDRFirstRound != "" {
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if err != nil {
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t.Fatalf("%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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} else {
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if err == nil {
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t.Fatalf("%v: unexpected success in AllocateOrOccupyCIDR: %v", tc.description, err)
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}
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// We don't expect any updates here
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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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}
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for _, cidrToRelease := range tc.cidrsToRelease {
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nodeToRelease := api.Node{
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ObjectMeta: api.ObjectMeta{
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Name: "node0",
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},
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}
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nodeToRelease.Spec.PodCIDR = cidrToRelease
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err = allocator.ReleaseCIDR(&nodeToRelease)
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if err != nil {
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t.Fatalf("%v: unexpected error in ReleaseCIDR: %v", tc.description, 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.Fatalf("%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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found := false
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seenCIDRs := []string{}
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for _, updatedNode := range tc.fakeNodeHandler.getUpdatedNodesCopy() {
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seenCIDRs = append(seenCIDRs, updatedNode.Spec.PodCIDR)
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if updatedNode.Spec.PodCIDR == tc.expectedAllocatedCIDRSecondRound {
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found = true
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break
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}
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}
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if !found {
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t.Errorf("%v: Unable to find allocated CIDR %v, found updated Nodes with CIDRs: %v",
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tc.description, tc.expectedAllocatedCIDRSecondRound, seenCIDRs)
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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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