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428 lines
18 KiB
Go
428 lines
18 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 app implements a server that runs a set of active
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// components. This includes replication controllers, service endpoints and
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// nodes.
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//
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package app
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import (
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"fmt"
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"net"
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"strings"
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"time"
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"github.com/golang/glog"
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"net/http"
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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/runtime/schema"
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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cacheddiscovery "k8s.io/client-go/discovery/cached"
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"k8s.io/client-go/dynamic"
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clientset "k8s.io/client-go/kubernetes"
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csiclientset "k8s.io/csi-api/pkg/client/clientset/versioned"
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"k8s.io/kubernetes/pkg/controller"
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endpointcontroller "k8s.io/kubernetes/pkg/controller/endpoint"
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"k8s.io/kubernetes/pkg/controller/garbagecollector"
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namespacecontroller "k8s.io/kubernetes/pkg/controller/namespace"
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nodeipamcontroller "k8s.io/kubernetes/pkg/controller/nodeipam"
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"k8s.io/kubernetes/pkg/controller/nodeipam/ipam"
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lifecyclecontroller "k8s.io/kubernetes/pkg/controller/nodelifecycle"
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"k8s.io/kubernetes/pkg/controller/podgc"
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replicationcontroller "k8s.io/kubernetes/pkg/controller/replication"
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resourcequotacontroller "k8s.io/kubernetes/pkg/controller/resourcequota"
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routecontroller "k8s.io/kubernetes/pkg/controller/route"
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servicecontroller "k8s.io/kubernetes/pkg/controller/service"
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serviceaccountcontroller "k8s.io/kubernetes/pkg/controller/serviceaccount"
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ttlcontroller "k8s.io/kubernetes/pkg/controller/ttl"
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"k8s.io/kubernetes/pkg/controller/ttlafterfinished"
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"k8s.io/kubernetes/pkg/controller/volume/attachdetach"
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"k8s.io/kubernetes/pkg/controller/volume/expand"
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persistentvolumecontroller "k8s.io/kubernetes/pkg/controller/volume/persistentvolume"
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"k8s.io/kubernetes/pkg/controller/volume/pvcprotection"
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"k8s.io/kubernetes/pkg/controller/volume/pvprotection"
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"k8s.io/kubernetes/pkg/features"
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"k8s.io/kubernetes/pkg/quota/generic"
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quotainstall "k8s.io/kubernetes/pkg/quota/install"
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"k8s.io/kubernetes/pkg/util/metrics"
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)
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func startServiceController(ctx ControllerContext) (http.Handler, bool, error) {
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serviceController, err := servicecontroller.New(
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ctx.Cloud,
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ctx.ClientBuilder.ClientOrDie("service-controller"),
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ctx.InformerFactory.Core().V1().Services(),
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ctx.InformerFactory.Core().V1().Nodes(),
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ctx.ComponentConfig.KubeCloudShared.ClusterName,
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)
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if err != nil {
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// This error shouldn't fail. It lives like this as a legacy.
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glog.Errorf("Failed to start service controller: %v", err)
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return nil, false, nil
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}
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go serviceController.Run(ctx.Stop, int(ctx.ComponentConfig.ServiceController.ConcurrentServiceSyncs))
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return nil, true, nil
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}
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func startNodeIpamController(ctx ControllerContext) (http.Handler, bool, error) {
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var clusterCIDR *net.IPNet = nil
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var serviceCIDR *net.IPNet = nil
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if !ctx.ComponentConfig.KubeCloudShared.AllocateNodeCIDRs {
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return nil, false, nil
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}
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var err error
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if len(strings.TrimSpace(ctx.ComponentConfig.KubeCloudShared.ClusterCIDR)) != 0 {
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_, clusterCIDR, err = net.ParseCIDR(ctx.ComponentConfig.KubeCloudShared.ClusterCIDR)
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if err != nil {
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glog.Warningf("Unsuccessful parsing of cluster CIDR %v: %v", ctx.ComponentConfig.KubeCloudShared.ClusterCIDR, err)
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}
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}
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if len(strings.TrimSpace(ctx.ComponentConfig.NodeIPAMController.ServiceCIDR)) != 0 {
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_, serviceCIDR, err = net.ParseCIDR(ctx.ComponentConfig.NodeIPAMController.ServiceCIDR)
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if err != nil {
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glog.Warningf("Unsuccessful parsing of service CIDR %v: %v", ctx.ComponentConfig.NodeIPAMController.ServiceCIDR, err)
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}
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}
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nodeIpamController, err := nodeipamcontroller.NewNodeIpamController(
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ctx.InformerFactory.Core().V1().Nodes(),
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ctx.Cloud,
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ctx.ClientBuilder.ClientOrDie("node-controller"),
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clusterCIDR,
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serviceCIDR,
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int(ctx.ComponentConfig.NodeIPAMController.NodeCIDRMaskSize),
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ipam.CIDRAllocatorType(ctx.ComponentConfig.KubeCloudShared.CIDRAllocatorType),
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)
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if err != nil {
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return nil, true, err
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}
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go nodeIpamController.Run(ctx.Stop)
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return nil, true, nil
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}
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func startNodeLifecycleController(ctx ControllerContext) (http.Handler, bool, error) {
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lifecycleController, err := lifecyclecontroller.NewNodeLifecycleController(
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ctx.InformerFactory.Core().V1().Pods(),
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ctx.InformerFactory.Core().V1().Nodes(),
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ctx.InformerFactory.Extensions().V1beta1().DaemonSets(),
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ctx.Cloud,
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ctx.ClientBuilder.ClientOrDie("node-controller"),
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ctx.ComponentConfig.KubeCloudShared.NodeMonitorPeriod.Duration,
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ctx.ComponentConfig.NodeLifecycleController.NodeStartupGracePeriod.Duration,
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ctx.ComponentConfig.NodeLifecycleController.NodeMonitorGracePeriod.Duration,
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ctx.ComponentConfig.NodeLifecycleController.PodEvictionTimeout.Duration,
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ctx.ComponentConfig.NodeLifecycleController.NodeEvictionRate,
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ctx.ComponentConfig.NodeLifecycleController.SecondaryNodeEvictionRate,
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ctx.ComponentConfig.NodeLifecycleController.LargeClusterSizeThreshold,
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ctx.ComponentConfig.NodeLifecycleController.UnhealthyZoneThreshold,
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ctx.ComponentConfig.NodeLifecycleController.EnableTaintManager,
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utilfeature.DefaultFeatureGate.Enabled(features.TaintBasedEvictions),
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utilfeature.DefaultFeatureGate.Enabled(features.TaintNodesByCondition),
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)
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if err != nil {
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return nil, true, err
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}
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go lifecycleController.Run(ctx.Stop)
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return nil, true, nil
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}
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func startRouteController(ctx ControllerContext) (http.Handler, bool, error) {
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if !ctx.ComponentConfig.KubeCloudShared.AllocateNodeCIDRs || !ctx.ComponentConfig.KubeCloudShared.ConfigureCloudRoutes {
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glog.Infof("Will not configure cloud provider routes for allocate-node-cidrs: %v, configure-cloud-routes: %v.", ctx.ComponentConfig.KubeCloudShared.AllocateNodeCIDRs, ctx.ComponentConfig.KubeCloudShared.ConfigureCloudRoutes)
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return nil, false, nil
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}
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if ctx.Cloud == nil {
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glog.Warning("configure-cloud-routes is set, but no cloud provider specified. Will not configure cloud provider routes.")
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return nil, false, nil
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}
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routes, ok := ctx.Cloud.Routes()
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if !ok {
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glog.Warning("configure-cloud-routes is set, but cloud provider does not support routes. Will not configure cloud provider routes.")
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return nil, false, nil
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}
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_, clusterCIDR, err := net.ParseCIDR(ctx.ComponentConfig.KubeCloudShared.ClusterCIDR)
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if err != nil {
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glog.Warningf("Unsuccessful parsing of cluster CIDR %v: %v", ctx.ComponentConfig.KubeCloudShared.ClusterCIDR, err)
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}
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routeController := routecontroller.New(routes, ctx.ClientBuilder.ClientOrDie("route-controller"), ctx.InformerFactory.Core().V1().Nodes(), ctx.ComponentConfig.KubeCloudShared.ClusterName, clusterCIDR)
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go routeController.Run(ctx.Stop, ctx.ComponentConfig.KubeCloudShared.RouteReconciliationPeriod.Duration)
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return nil, true, nil
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}
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func startPersistentVolumeBinderController(ctx ControllerContext) (http.Handler, bool, error) {
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params := persistentvolumecontroller.ControllerParameters{
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KubeClient: ctx.ClientBuilder.ClientOrDie("persistent-volume-binder"),
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SyncPeriod: ctx.ComponentConfig.PersistentVolumeBinderController.PVClaimBinderSyncPeriod.Duration,
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VolumePlugins: ProbeControllerVolumePlugins(ctx.Cloud, ctx.ComponentConfig.PersistentVolumeBinderController.VolumeConfiguration),
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Cloud: ctx.Cloud,
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ClusterName: ctx.ComponentConfig.KubeCloudShared.ClusterName,
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VolumeInformer: ctx.InformerFactory.Core().V1().PersistentVolumes(),
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ClaimInformer: ctx.InformerFactory.Core().V1().PersistentVolumeClaims(),
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ClassInformer: ctx.InformerFactory.Storage().V1().StorageClasses(),
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PodInformer: ctx.InformerFactory.Core().V1().Pods(),
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NodeInformer: ctx.InformerFactory.Core().V1().Nodes(),
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EnableDynamicProvisioning: ctx.ComponentConfig.PersistentVolumeBinderController.VolumeConfiguration.EnableDynamicProvisioning,
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}
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volumeController, volumeControllerErr := persistentvolumecontroller.NewController(params)
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if volumeControllerErr != nil {
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return nil, true, fmt.Errorf("failed to construct persistentvolume controller: %v", volumeControllerErr)
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}
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go volumeController.Run(ctx.Stop)
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return nil, true, nil
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}
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func startAttachDetachController(ctx ControllerContext) (http.Handler, bool, error) {
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if ctx.ComponentConfig.AttachDetachController.ReconcilerSyncLoopPeriod.Duration < time.Second {
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return nil, true, fmt.Errorf("Duration time must be greater than one second as set via command line option reconcile-sync-loop-period.")
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}
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csiClientConfig := ctx.ClientBuilder.ConfigOrDie("attachdetach-controller")
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// csiClient works with CRDs that support json only
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csiClientConfig.ContentType = "application/json"
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attachDetachController, attachDetachControllerErr :=
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attachdetach.NewAttachDetachController(
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ctx.ClientBuilder.ClientOrDie("attachdetach-controller"),
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csiclientset.NewForConfigOrDie(csiClientConfig),
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ctx.InformerFactory.Core().V1().Pods(),
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ctx.InformerFactory.Core().V1().Nodes(),
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ctx.InformerFactory.Core().V1().PersistentVolumeClaims(),
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ctx.InformerFactory.Core().V1().PersistentVolumes(),
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ctx.Cloud,
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ProbeAttachableVolumePlugins(),
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GetDynamicPluginProber(ctx.ComponentConfig.PersistentVolumeBinderController.VolumeConfiguration),
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ctx.ComponentConfig.AttachDetachController.DisableAttachDetachReconcilerSync,
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ctx.ComponentConfig.AttachDetachController.ReconcilerSyncLoopPeriod.Duration,
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attachdetach.DefaultTimerConfig,
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)
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if attachDetachControllerErr != nil {
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return nil, true, fmt.Errorf("failed to start attach/detach controller: %v", attachDetachControllerErr)
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}
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go attachDetachController.Run(ctx.Stop)
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return nil, true, nil
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}
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func startVolumeExpandController(ctx ControllerContext) (http.Handler, bool, error) {
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if utilfeature.DefaultFeatureGate.Enabled(features.ExpandPersistentVolumes) {
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expandController, expandControllerErr := expand.NewExpandController(
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ctx.ClientBuilder.ClientOrDie("expand-controller"),
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ctx.InformerFactory.Core().V1().PersistentVolumeClaims(),
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ctx.InformerFactory.Core().V1().PersistentVolumes(),
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ctx.Cloud,
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ProbeExpandableVolumePlugins(ctx.ComponentConfig.PersistentVolumeBinderController.VolumeConfiguration))
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if expandControllerErr != nil {
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return nil, true, fmt.Errorf("Failed to start volume expand controller : %v", expandControllerErr)
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}
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go expandController.Run(ctx.Stop)
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return nil, true, nil
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}
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return nil, false, nil
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}
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func startEndpointController(ctx ControllerContext) (http.Handler, bool, error) {
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go endpointcontroller.NewEndpointController(
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ctx.InformerFactory.Core().V1().Pods(),
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ctx.InformerFactory.Core().V1().Services(),
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ctx.InformerFactory.Core().V1().Endpoints(),
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ctx.ClientBuilder.ClientOrDie("endpoint-controller"),
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).Run(int(ctx.ComponentConfig.EndpointController.ConcurrentEndpointSyncs), ctx.Stop)
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return nil, true, nil
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}
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func startReplicationController(ctx ControllerContext) (http.Handler, bool, error) {
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go replicationcontroller.NewReplicationManager(
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ctx.InformerFactory.Core().V1().Pods(),
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ctx.InformerFactory.Core().V1().ReplicationControllers(),
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ctx.ClientBuilder.ClientOrDie("replication-controller"),
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replicationcontroller.BurstReplicas,
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).Run(int(ctx.ComponentConfig.ReplicationController.ConcurrentRCSyncs), ctx.Stop)
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return nil, true, nil
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}
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func startPodGCController(ctx ControllerContext) (http.Handler, bool, error) {
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go podgc.NewPodGC(
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ctx.ClientBuilder.ClientOrDie("pod-garbage-collector"),
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ctx.InformerFactory.Core().V1().Pods(),
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int(ctx.ComponentConfig.PodGCController.TerminatedPodGCThreshold),
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).Run(ctx.Stop)
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return nil, true, nil
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}
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func startResourceQuotaController(ctx ControllerContext) (http.Handler, bool, error) {
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resourceQuotaControllerClient := ctx.ClientBuilder.ClientOrDie("resourcequota-controller")
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discoveryFunc := resourceQuotaControllerClient.Discovery().ServerPreferredNamespacedResources
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listerFuncForResource := generic.ListerFuncForResourceFunc(ctx.InformerFactory.ForResource)
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quotaConfiguration := quotainstall.NewQuotaConfigurationForControllers(listerFuncForResource)
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resourceQuotaControllerOptions := &resourcequotacontroller.ResourceQuotaControllerOptions{
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QuotaClient: resourceQuotaControllerClient.CoreV1(),
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ResourceQuotaInformer: ctx.InformerFactory.Core().V1().ResourceQuotas(),
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ResyncPeriod: controller.StaticResyncPeriodFunc(ctx.ComponentConfig.ResourceQuotaController.ResourceQuotaSyncPeriod.Duration),
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InformerFactory: ctx.InformerFactory,
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ReplenishmentResyncPeriod: ctx.ResyncPeriod,
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DiscoveryFunc: discoveryFunc,
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IgnoredResourcesFunc: quotaConfiguration.IgnoredResources,
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InformersStarted: ctx.InformersStarted,
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Registry: generic.NewRegistry(quotaConfiguration.Evaluators()),
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}
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if resourceQuotaControllerClient.CoreV1().RESTClient().GetRateLimiter() != nil {
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if err := metrics.RegisterMetricAndTrackRateLimiterUsage("resource_quota_controller", resourceQuotaControllerClient.CoreV1().RESTClient().GetRateLimiter()); err != nil {
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return nil, true, err
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}
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}
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resourceQuotaController, err := resourcequotacontroller.NewResourceQuotaController(resourceQuotaControllerOptions)
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if err != nil {
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return nil, false, err
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}
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go resourceQuotaController.Run(int(ctx.ComponentConfig.ResourceQuotaController.ConcurrentResourceQuotaSyncs), ctx.Stop)
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// Periodically the quota controller to detect new resource types
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go resourceQuotaController.Sync(discoveryFunc, 30*time.Second, ctx.Stop)
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return nil, true, nil
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}
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func startNamespaceController(ctx ControllerContext) (http.Handler, bool, error) {
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// the namespace cleanup controller is very chatty. It makes lots of discovery calls and then it makes lots of delete calls
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// the ratelimiter negatively affects its speed. Deleting 100 total items in a namespace (that's only a few of each resource
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// including events), takes ~10 seconds by default.
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nsKubeconfig := ctx.ClientBuilder.ConfigOrDie("namespace-controller")
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nsKubeconfig.QPS *= 20
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nsKubeconfig.Burst *= 100
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namespaceKubeClient := clientset.NewForConfigOrDie(nsKubeconfig)
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dynamicClient, err := dynamic.NewForConfig(nsKubeconfig)
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if err != nil {
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return nil, true, err
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}
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discoverResourcesFn := namespaceKubeClient.Discovery().ServerPreferredNamespacedResources
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namespaceController := namespacecontroller.NewNamespaceController(
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namespaceKubeClient,
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dynamicClient,
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discoverResourcesFn,
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ctx.InformerFactory.Core().V1().Namespaces(),
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ctx.ComponentConfig.NamespaceController.NamespaceSyncPeriod.Duration,
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v1.FinalizerKubernetes,
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)
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go namespaceController.Run(int(ctx.ComponentConfig.NamespaceController.ConcurrentNamespaceSyncs), ctx.Stop)
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return nil, true, nil
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}
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func startServiceAccountController(ctx ControllerContext) (http.Handler, bool, error) {
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sac, err := serviceaccountcontroller.NewServiceAccountsController(
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ctx.InformerFactory.Core().V1().ServiceAccounts(),
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ctx.InformerFactory.Core().V1().Namespaces(),
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ctx.ClientBuilder.ClientOrDie("service-account-controller"),
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serviceaccountcontroller.DefaultServiceAccountsControllerOptions(),
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)
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if err != nil {
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return nil, true, fmt.Errorf("error creating ServiceAccount controller: %v", err)
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}
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go sac.Run(1, ctx.Stop)
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return nil, true, nil
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}
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func startTTLController(ctx ControllerContext) (http.Handler, bool, error) {
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go ttlcontroller.NewTTLController(
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ctx.InformerFactory.Core().V1().Nodes(),
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ctx.ClientBuilder.ClientOrDie("ttl-controller"),
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).Run(5, ctx.Stop)
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return nil, true, nil
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}
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func startGarbageCollectorController(ctx ControllerContext) (http.Handler, bool, error) {
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if !ctx.ComponentConfig.GarbageCollectorController.EnableGarbageCollector {
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return nil, false, nil
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}
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gcClientset := ctx.ClientBuilder.ClientOrDie("generic-garbage-collector")
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discoveryClient := cacheddiscovery.NewMemCacheClient(gcClientset.Discovery())
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config := ctx.ClientBuilder.ConfigOrDie("generic-garbage-collector")
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dynamicClient, err := dynamic.NewForConfig(config)
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if err != nil {
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return nil, true, err
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}
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// Get an initial set of deletable resources to prime the garbage collector.
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deletableResources := garbagecollector.GetDeletableResources(discoveryClient)
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ignoredResources := make(map[schema.GroupResource]struct{})
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for _, r := range ctx.ComponentConfig.GarbageCollectorController.GCIgnoredResources {
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ignoredResources[schema.GroupResource{Group: r.Group, Resource: r.Resource}] = struct{}{}
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}
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garbageCollector, err := garbagecollector.NewGarbageCollector(
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dynamicClient,
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ctx.RESTMapper,
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deletableResources,
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ignoredResources,
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ctx.InformerFactory,
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ctx.InformersStarted,
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)
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if err != nil {
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return nil, true, fmt.Errorf("Failed to start the generic garbage collector: %v", err)
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}
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// Start the garbage collector.
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workers := int(ctx.ComponentConfig.GarbageCollectorController.ConcurrentGCSyncs)
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go garbageCollector.Run(workers, ctx.Stop)
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// Periodically refresh the RESTMapper with new discovery information and sync
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// the garbage collector.
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go garbageCollector.Sync(gcClientset.Discovery(), 30*time.Second, ctx.Stop)
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return garbagecollector.NewDebugHandler(garbageCollector), true, nil
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}
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func startPVCProtectionController(ctx ControllerContext) (http.Handler, bool, error) {
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go pvcprotection.NewPVCProtectionController(
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ctx.InformerFactory.Core().V1().PersistentVolumeClaims(),
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ctx.InformerFactory.Core().V1().Pods(),
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ctx.ClientBuilder.ClientOrDie("pvc-protection-controller"),
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utilfeature.DefaultFeatureGate.Enabled(features.StorageObjectInUseProtection),
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).Run(1, ctx.Stop)
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return nil, true, nil
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}
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func startPVProtectionController(ctx ControllerContext) (http.Handler, bool, error) {
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go pvprotection.NewPVProtectionController(
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ctx.InformerFactory.Core().V1().PersistentVolumes(),
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ctx.ClientBuilder.ClientOrDie("pv-protection-controller"),
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utilfeature.DefaultFeatureGate.Enabled(features.StorageObjectInUseProtection),
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).Run(1, ctx.Stop)
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return nil, true, nil
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}
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func startTTLAfterFinishedController(ctx ControllerContext) (http.Handler, bool, error) {
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if !utilfeature.DefaultFeatureGate.Enabled(features.TTLAfterFinished) {
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return nil, false, nil
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}
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go ttlafterfinished.New(
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ctx.InformerFactory.Batch().V1().Jobs(),
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|
ctx.ClientBuilder.ClientOrDie("ttl-after-finished-controller"),
|
|
).Run(int(ctx.ComponentConfig.TTLAfterFinishedController.ConcurrentTTLSyncs), ctx.Stop)
|
|
return nil, true, nil
|
|
}
|