332d151d61
* rolling.go (has all the logic for rolling deployments) * recreate.go (has all the logic for recreate deployments) * sync.go (has all the logic for getting and scaling replica sets) * rollback.go (has all the logic for rolling back a deployment) * util.go (contains all the utilities used throughout the controller) Leave back at deployment_controller.go all the necessary bits for creating, setting up, and running the controller loop. Also add package documentation.
349 lines
12 KiB
Go
349 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 deployment
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import (
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"testing"
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"time"
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"k8s.io/kubernetes/pkg/api/unversioned"
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exp "k8s.io/kubernetes/pkg/apis/extensions"
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"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/fake"
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"k8s.io/kubernetes/pkg/client/record"
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"k8s.io/kubernetes/pkg/controller"
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"k8s.io/kubernetes/pkg/util/intstr"
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)
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func TestScale(t *testing.T) {
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newTimestamp := unversioned.Date(2016, 5, 20, 2, 0, 0, 0, time.UTC)
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oldTimestamp := unversioned.Date(2016, 5, 20, 1, 0, 0, 0, time.UTC)
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olderTimestamp := unversioned.Date(2016, 5, 20, 0, 0, 0, 0, time.UTC)
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tests := []struct {
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name string
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deployment *exp.Deployment
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oldDeployment *exp.Deployment
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newRS *exp.ReplicaSet
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oldRSs []*exp.ReplicaSet
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expectedNew *exp.ReplicaSet
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expectedOld []*exp.ReplicaSet
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desiredReplicasAnnotations map[string]int32
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}{
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{
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name: "normal scaling event: 10 -> 12",
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deployment: newDeployment(12, nil),
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oldDeployment: newDeployment(10, nil),
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newRS: rs("foo-v1", 10, nil, newTimestamp),
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oldRSs: []*exp.ReplicaSet{},
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expectedNew: rs("foo-v1", 12, nil, newTimestamp),
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expectedOld: []*exp.ReplicaSet{},
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},
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{
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name: "normal scaling event: 10 -> 5",
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deployment: newDeployment(5, nil),
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oldDeployment: newDeployment(10, nil),
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newRS: rs("foo-v1", 10, nil, newTimestamp),
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oldRSs: []*exp.ReplicaSet{},
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expectedNew: rs("foo-v1", 5, nil, newTimestamp),
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expectedOld: []*exp.ReplicaSet{},
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},
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{
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name: "proportional scaling: 5 -> 10",
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deployment: newDeployment(10, nil),
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oldDeployment: newDeployment(5, nil),
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newRS: rs("foo-v2", 2, nil, newTimestamp),
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oldRSs: []*exp.ReplicaSet{rs("foo-v1", 3, nil, oldTimestamp)},
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expectedNew: rs("foo-v2", 4, nil, newTimestamp),
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expectedOld: []*exp.ReplicaSet{rs("foo-v1", 6, nil, oldTimestamp)},
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},
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{
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name: "proportional scaling: 5 -> 3",
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deployment: newDeployment(3, nil),
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oldDeployment: newDeployment(5, nil),
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newRS: rs("foo-v2", 2, nil, newTimestamp),
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oldRSs: []*exp.ReplicaSet{rs("foo-v1", 3, nil, oldTimestamp)},
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expectedNew: rs("foo-v2", 1, nil, newTimestamp),
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expectedOld: []*exp.ReplicaSet{rs("foo-v1", 2, nil, oldTimestamp)},
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},
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{
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name: "proportional scaling: 9 -> 4",
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deployment: newDeployment(4, nil),
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oldDeployment: newDeployment(9, nil),
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newRS: rs("foo-v2", 8, nil, newTimestamp),
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oldRSs: []*exp.ReplicaSet{rs("foo-v1", 1, nil, oldTimestamp)},
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expectedNew: rs("foo-v2", 4, nil, newTimestamp),
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expectedOld: []*exp.ReplicaSet{rs("foo-v1", 0, nil, oldTimestamp)},
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},
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{
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name: "proportional scaling: 7 -> 10",
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deployment: newDeployment(10, nil),
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oldDeployment: newDeployment(7, nil),
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newRS: rs("foo-v3", 2, nil, newTimestamp),
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oldRSs: []*exp.ReplicaSet{rs("foo-v2", 3, nil, oldTimestamp), rs("foo-v1", 2, nil, olderTimestamp)},
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expectedNew: rs("foo-v3", 3, nil, newTimestamp),
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expectedOld: []*exp.ReplicaSet{rs("foo-v2", 4, nil, oldTimestamp), rs("foo-v1", 3, nil, olderTimestamp)},
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},
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{
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name: "proportional scaling: 13 -> 8",
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deployment: newDeployment(8, nil),
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oldDeployment: newDeployment(13, nil),
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newRS: rs("foo-v3", 2, nil, newTimestamp),
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oldRSs: []*exp.ReplicaSet{rs("foo-v2", 8, nil, oldTimestamp), rs("foo-v1", 3, nil, olderTimestamp)},
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expectedNew: rs("foo-v3", 1, nil, newTimestamp),
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expectedOld: []*exp.ReplicaSet{rs("foo-v2", 5, nil, oldTimestamp), rs("foo-v1", 2, nil, olderTimestamp)},
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},
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// Scales up the new replica set.
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{
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name: "leftover distribution: 3 -> 4",
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deployment: newDeployment(4, nil),
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oldDeployment: newDeployment(3, nil),
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newRS: rs("foo-v3", 1, nil, newTimestamp),
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oldRSs: []*exp.ReplicaSet{rs("foo-v2", 1, nil, oldTimestamp), rs("foo-v1", 1, nil, olderTimestamp)},
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expectedNew: rs("foo-v3", 2, nil, newTimestamp),
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expectedOld: []*exp.ReplicaSet{rs("foo-v2", 1, nil, oldTimestamp), rs("foo-v1", 1, nil, olderTimestamp)},
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},
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// Scales down the older replica set.
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{
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name: "leftover distribution: 3 -> 2",
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deployment: newDeployment(2, nil),
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oldDeployment: newDeployment(3, nil),
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newRS: rs("foo-v3", 1, nil, newTimestamp),
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oldRSs: []*exp.ReplicaSet{rs("foo-v2", 1, nil, oldTimestamp), rs("foo-v1", 1, nil, olderTimestamp)},
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expectedNew: rs("foo-v3", 1, nil, newTimestamp),
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expectedOld: []*exp.ReplicaSet{rs("foo-v2", 1, nil, oldTimestamp), rs("foo-v1", 0, nil, olderTimestamp)},
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},
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// Scales up the latest replica set first.
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{
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name: "proportional scaling (no new rs): 4 -> 5",
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deployment: newDeployment(5, nil),
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oldDeployment: newDeployment(4, nil),
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newRS: nil,
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oldRSs: []*exp.ReplicaSet{rs("foo-v2", 2, nil, oldTimestamp), rs("foo-v1", 2, nil, olderTimestamp)},
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expectedNew: nil,
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expectedOld: []*exp.ReplicaSet{rs("foo-v2", 3, nil, oldTimestamp), rs("foo-v1", 2, nil, olderTimestamp)},
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},
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// Scales down to zero
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{
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name: "proportional scaling: 6 -> 0",
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deployment: newDeployment(0, nil),
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oldDeployment: newDeployment(6, nil),
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newRS: rs("foo-v3", 3, nil, newTimestamp),
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oldRSs: []*exp.ReplicaSet{rs("foo-v2", 2, nil, oldTimestamp), rs("foo-v1", 1, nil, olderTimestamp)},
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expectedNew: rs("foo-v3", 0, nil, newTimestamp),
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expectedOld: []*exp.ReplicaSet{rs("foo-v2", 0, nil, oldTimestamp), rs("foo-v1", 0, nil, olderTimestamp)},
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},
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// Scales up from zero
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{
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name: "proportional scaling: 0 -> 6",
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deployment: newDeployment(6, nil),
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oldDeployment: newDeployment(0, nil),
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newRS: rs("foo-v3", 0, nil, newTimestamp),
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oldRSs: []*exp.ReplicaSet{rs("foo-v2", 0, nil, oldTimestamp), rs("foo-v1", 0, nil, olderTimestamp)},
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expectedNew: rs("foo-v3", 6, nil, newTimestamp),
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expectedOld: []*exp.ReplicaSet{rs("foo-v2", 0, nil, oldTimestamp), rs("foo-v1", 0, nil, olderTimestamp)},
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},
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// Scenario: deployment.spec.replicas == 3 ( foo-v1.spec.replicas == foo-v2.spec.replicas == foo-v3.spec.replicas == 1 )
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// Deployment is scaled to 5. foo-v3.spec.replicas and foo-v2.spec.replicas should increment by 1 but foo-v2 fails to
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// update.
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{
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name: "failed rs update",
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deployment: newDeployment(5, nil),
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oldDeployment: newDeployment(5, nil),
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newRS: rs("foo-v3", 2, nil, newTimestamp),
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oldRSs: []*exp.ReplicaSet{rs("foo-v2", 1, nil, oldTimestamp), rs("foo-v1", 1, nil, olderTimestamp)},
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expectedNew: rs("foo-v3", 2, nil, newTimestamp),
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expectedOld: []*exp.ReplicaSet{rs("foo-v2", 2, nil, oldTimestamp), rs("foo-v1", 1, nil, olderTimestamp)},
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desiredReplicasAnnotations: map[string]int32{"foo-v2": int32(3)},
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},
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{
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name: "deployment with surge pods",
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deployment: newDeploymentEnhanced(20, intstr.FromInt(2)),
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oldDeployment: newDeploymentEnhanced(10, intstr.FromInt(2)),
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newRS: rs("foo-v2", 6, nil, newTimestamp),
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oldRSs: []*exp.ReplicaSet{rs("foo-v1", 6, nil, oldTimestamp)},
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expectedNew: rs("foo-v2", 11, nil, newTimestamp),
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expectedOld: []*exp.ReplicaSet{rs("foo-v1", 11, nil, oldTimestamp)},
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},
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{
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name: "change both surge and size",
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deployment: newDeploymentEnhanced(50, intstr.FromInt(6)),
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oldDeployment: newDeploymentEnhanced(10, intstr.FromInt(3)),
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newRS: rs("foo-v2", 5, nil, newTimestamp),
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oldRSs: []*exp.ReplicaSet{rs("foo-v1", 8, nil, oldTimestamp)},
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expectedNew: rs("foo-v2", 22, nil, newTimestamp),
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expectedOld: []*exp.ReplicaSet{rs("foo-v1", 34, nil, oldTimestamp)},
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},
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}
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for _, test := range tests {
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_ = olderTimestamp
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t.Log(test.name)
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fake := fake.Clientset{}
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dc := &DeploymentController{
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client: &fake,
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eventRecorder: &record.FakeRecorder{},
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}
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if test.newRS != nil {
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desiredReplicas := test.oldDeployment.Spec.Replicas
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if desired, ok := test.desiredReplicasAnnotations[test.newRS.Name]; ok {
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desiredReplicas = desired
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}
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setReplicasAnnotations(test.newRS, desiredReplicas, desiredReplicas+maxSurge(*test.oldDeployment))
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}
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for i := range test.oldRSs {
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rs := test.oldRSs[i]
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if rs == nil {
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continue
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}
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desiredReplicas := test.oldDeployment.Spec.Replicas
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if desired, ok := test.desiredReplicasAnnotations[rs.Name]; ok {
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desiredReplicas = desired
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}
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setReplicasAnnotations(rs, desiredReplicas, desiredReplicas+maxSurge(*test.oldDeployment))
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}
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if err := dc.scale(test.deployment, test.newRS, test.oldRSs); err != nil {
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t.Errorf("%s: unexpected error: %v", test.name, err)
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continue
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}
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if test.expectedNew != nil && test.newRS != nil && test.expectedNew.Spec.Replicas != test.newRS.Spec.Replicas {
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t.Errorf("%s: expected new replicas: %d, got: %d", test.name, test.expectedNew.Spec.Replicas, test.newRS.Spec.Replicas)
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continue
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}
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if len(test.expectedOld) != len(test.oldRSs) {
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t.Errorf("%s: expected %d old replica sets, got %d", test.name, len(test.expectedOld), len(test.oldRSs))
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continue
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}
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for n := range test.oldRSs {
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rs := test.oldRSs[n]
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exp := test.expectedOld[n]
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if exp.Spec.Replicas != rs.Spec.Replicas {
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t.Errorf("%s: expected old (%s) replicas: %d, got: %d", test.name, rs.Name, exp.Spec.Replicas, rs.Spec.Replicas)
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}
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}
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}
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}
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func TestDeploymentController_cleanupDeployment(t *testing.T) {
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selector := map[string]string{"foo": "bar"}
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tests := []struct {
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oldRSs []*exp.ReplicaSet
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revisionHistoryLimit int
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expectedDeletions int
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}{
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{
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oldRSs: []*exp.ReplicaSet{
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newRSWithStatus("foo-1", 0, 0, selector),
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newRSWithStatus("foo-2", 0, 0, selector),
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newRSWithStatus("foo-3", 0, 0, selector),
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},
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revisionHistoryLimit: 1,
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expectedDeletions: 2,
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},
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{
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// Only delete the replica set with Spec.Replicas = Status.Replicas = 0.
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oldRSs: []*exp.ReplicaSet{
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newRSWithStatus("foo-1", 0, 0, selector),
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newRSWithStatus("foo-2", 0, 1, selector),
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newRSWithStatus("foo-3", 1, 0, selector),
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newRSWithStatus("foo-4", 1, 1, selector),
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},
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revisionHistoryLimit: 0,
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expectedDeletions: 1,
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},
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{
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oldRSs: []*exp.ReplicaSet{
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newRSWithStatus("foo-1", 0, 0, selector),
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newRSWithStatus("foo-2", 0, 0, selector),
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},
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revisionHistoryLimit: 0,
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expectedDeletions: 2,
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},
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{
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oldRSs: []*exp.ReplicaSet{
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newRSWithStatus("foo-1", 1, 1, selector),
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newRSWithStatus("foo-2", 1, 1, selector),
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},
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revisionHistoryLimit: 0,
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expectedDeletions: 0,
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},
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}
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for i, test := range tests {
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fake := &fake.Clientset{}
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controller := NewDeploymentController(fake, controller.NoResyncPeriodFunc)
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controller.eventRecorder = &record.FakeRecorder{}
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controller.rsStoreSynced = alwaysReady
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controller.podStoreSynced = alwaysReady
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for _, rs := range test.oldRSs {
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controller.rsStore.Add(rs)
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}
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d := newDeployment(1, &tests[i].revisionHistoryLimit)
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controller.cleanupDeployment(test.oldRSs, d)
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gotDeletions := 0
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for _, action := range fake.Actions() {
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if "delete" == action.GetVerb() {
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gotDeletions++
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}
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}
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if gotDeletions != test.expectedDeletions {
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t.Errorf("expect %v old replica sets been deleted, but got %v", test.expectedDeletions, gotDeletions)
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continue
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}
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}
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}
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