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gardener_kube_scheduler_bootstrap.go
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gardener_kube_scheduler_bootstrap.go
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// Copyright (c) 2020 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package gardenerkubescheduler
import (
"github.com/gardener/gardener/pkg/features"
gardenletfeatures "github.com/gardener/gardener/pkg/gardenlet/features"
"github.com/gardener/gardener/pkg/operation/botanist/component"
"github.com/gardener/gardener/pkg/operation/botanist/component/gardenerkubescheduler/configurator"
schedulerconfigv18 "github.com/gardener/gardener/pkg/operation/botanist/component/gardenerkubescheduler/v18"
schedulerconfigv19 "github.com/gardener/gardener/pkg/operation/botanist/component/gardenerkubescheduler/v19"
schedulerconfigv20 "github.com/gardener/gardener/pkg/operation/botanist/component/gardenerkubescheduler/v20"
"github.com/gardener/gardener/pkg/operation/botanist/component/seedadmissioncontroller"
"github.com/gardener/gardener/pkg/seedadmissioncontroller/webhooks/admission/podschedulername"
"github.com/gardener/gardener/pkg/utils/imagevector"
schedulerconfigv18v1alpha2 "github.com/gardener/gardener/third_party/kube-scheduler/v18/v1alpha2"
schedulerconfigv19v1beta1 "github.com/gardener/gardener/third_party/kube-scheduler/v19/v1beta1"
schedulerconfigv20v1beta1 "github.com/gardener/gardener/third_party/kube-scheduler/v20/v1beta1"
"github.com/Masterminds/semver"
"github.com/pkg/errors"
admissionregistrationv1beta1 "k8s.io/api/admissionregistration/v1beta1"
"k8s.io/utils/pointer"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// Bootstrap is used to bootstrap gardener-kube-scheduler in Seed clusters.
func Bootstrap(
c client.Client,
seedAdmissionControllerNamespace string,
image *imagevector.Image,
seedVersion *semver.Version,
) (
component.DeployWaiter,
error,
) {
if c == nil {
return nil, errors.New("client is required")
}
if len(seedAdmissionControllerNamespace) == 0 {
return nil, errors.New("seedAdmissionControllerNamespace is required")
}
if seedVersion == nil {
return nil, errors.New("seedVersion is required")
}
var (
config = configurator.NoOp()
err error
supportedVersion = true
)
switch {
case versionConstraintEqual118.Check(seedVersion):
config, err = schedulerconfigv18.NewConfigurator(Name, Name, &schedulerconfigv18v1alpha2.KubeSchedulerConfiguration{
Profiles: []schedulerconfigv18v1alpha2.KubeSchedulerProfile{{
SchedulerName: pointer.StringPtr(podschedulername.GardenerShootControlPlaneSchedulerName),
Plugins: &schedulerconfigv18v1alpha2.Plugins{
Score: &schedulerconfigv18v1alpha2.PluginSet{
Disabled: []schedulerconfigv18v1alpha2.Plugin{
{Name: "NodeResourcesLeastAllocated"},
{Name: "NodeResourcesBalancedAllocation"},
},
Enabled: []schedulerconfigv18v1alpha2.Plugin{
{Name: "NodeResourcesMostAllocated"},
},
},
},
}},
})
case versionConstraintEqual119.Check(seedVersion):
config, err = schedulerconfigv19.NewConfigurator(Name, Name, &schedulerconfigv19v1beta1.KubeSchedulerConfiguration{
Profiles: []schedulerconfigv19v1beta1.KubeSchedulerProfile{{
SchedulerName: pointer.StringPtr(podschedulername.GardenerShootControlPlaneSchedulerName),
Plugins: &schedulerconfigv19v1beta1.Plugins{
Score: &schedulerconfigv19v1beta1.PluginSet{
Disabled: []schedulerconfigv19v1beta1.Plugin{
{Name: "NodeResourcesLeastAllocated"},
{Name: "NodeResourcesBalancedAllocation"},
},
Enabled: []schedulerconfigv19v1beta1.Plugin{
{Name: "NodeResourcesMostAllocated"},
},
},
},
}},
})
case versionConstraintEqual120.Check(seedVersion):
config, err = schedulerconfigv20.NewConfigurator(Name, Name, &schedulerconfigv20v1beta1.KubeSchedulerConfiguration{
Profiles: []schedulerconfigv20v1beta1.KubeSchedulerProfile{{
SchedulerName: pointer.StringPtr(podschedulername.GardenerShootControlPlaneSchedulerName),
Plugins: &schedulerconfigv20v1beta1.Plugins{
Score: &schedulerconfigv20v1beta1.PluginSet{
Disabled: []schedulerconfigv20v1beta1.Plugin{
{Name: "NodeResourcesLeastAllocated"},
{Name: "NodeResourcesBalancedAllocation"},
},
Enabled: []schedulerconfigv20v1beta1.Plugin{
{Name: "NodeResourcesMostAllocated"},
},
},
},
}},
})
default:
supportedVersion = false
}
if err != nil {
return nil, err
}
scheduler, err := New(
c,
Name,
image,
config,
&admissionregistrationv1beta1.WebhookClientConfig{
Service: &admissionregistrationv1beta1.ServiceReference{
Name: seedadmissioncontroller.Name,
Namespace: seedAdmissionControllerNamespace,
Path: pointer.StringPtr(podschedulername.WebhookPath),
},
CABundle: []byte(seedadmissioncontroller.TLSCACert),
},
)
if err != nil {
return nil, err
}
if supportedVersion && gardenletfeatures.FeatureGate.Enabled(features.SeedKubeScheduler) {
return scheduler, nil
}
return component.OpDestroy(scheduler), nil
}