1b7d06e025
This extends the Kubelet to create and periodically update leases in a new kube-node-lease namespace. Based on [KEP-0009](https://github.com/kubernetes/community/blob/master/keps/sig-node/0009-node-heartbeat.md), these leases can be used as a node health signal, and will allow us to reduce the load caused by over-frequent node status reporting. - add NodeLease feature gate - add kube-node-lease system namespace for node leases - add Kubelet option for lease duration - add Kubelet-internal lease controller to create and update lease - add e2e test for NodeLease feature - modify node authorizer and node restriction admission controller to allow Kubelets access to corresponding leases
100 lines
2.7 KiB
Go
100 lines
2.7 KiB
Go
/*
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Copyright 2018 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 nodelease
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import (
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"testing"
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"time"
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coordv1beta1 "k8s.io/api/coordination/v1beta1"
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apiequality "k8s.io/apimachinery/pkg/api/equality"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/clock"
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"k8s.io/apimachinery/pkg/util/diff"
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"k8s.io/utils/pointer"
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)
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func TestNewLease(t *testing.T) {
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fakeClock := clock.NewFakeClock(time.Now())
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cases := []struct {
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desc string
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controller *controller
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base *coordv1beta1.Lease
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expect *coordv1beta1.Lease
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}{
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{
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desc: "nil base",
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controller: &controller{
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holderIdentity: "foo",
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leaseDurationSeconds: 10,
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clock: fakeClock,
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},
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base: nil,
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expect: &coordv1beta1.Lease{
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ObjectMeta: metav1.ObjectMeta{
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Name: "foo",
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},
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Spec: coordv1beta1.LeaseSpec{
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HolderIdentity: pointer.StringPtr("foo"),
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LeaseDurationSeconds: pointer.Int32Ptr(10),
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RenewTime: &metav1.MicroTime{Time: fakeClock.Now()},
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},
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},
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},
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{
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desc: "non-nil base renew time is updated",
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controller: &controller{
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holderIdentity: "foo",
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leaseDurationSeconds: 10,
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clock: fakeClock,
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},
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base: &coordv1beta1.Lease{
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ObjectMeta: metav1.ObjectMeta{
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Name: "foo",
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},
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Spec: coordv1beta1.LeaseSpec{
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HolderIdentity: pointer.StringPtr("foo"),
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LeaseDurationSeconds: pointer.Int32Ptr(10),
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RenewTime: &metav1.MicroTime{Time: fakeClock.Now().Add(-10 * time.Second)},
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},
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},
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expect: &coordv1beta1.Lease{
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ObjectMeta: metav1.ObjectMeta{
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Name: "foo",
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},
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Spec: coordv1beta1.LeaseSpec{
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HolderIdentity: pointer.StringPtr("foo"),
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LeaseDurationSeconds: pointer.Int32Ptr(10),
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RenewTime: &metav1.MicroTime{Time: fakeClock.Now()},
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},
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},
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},
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}
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for _, tc := range cases {
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t.Run(tc.desc, func(t *testing.T) {
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newLease := tc.controller.newLease(tc.base)
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if newLease == tc.base {
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t.Fatalf("the new lease must be newly allocated, but got same address as base")
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}
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if !apiequality.Semantic.DeepEqual(tc.expect, newLease) {
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t.Errorf("unexpected result from newLease: %s", diff.ObjectDiff(tc.expect, newLease))
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}
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})
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}
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}
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