5cecc6ec68
Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Do not recycle volumes that are used by pods **What this PR does / why we need it**: Recycler should wait until all pods that use a volume are finished. Consider this scenario: 1. User creates a PVC that's bound to a NFS PV. 2. User creates a pod that uses the PVC 3. User deletes the PVC. Now the PV gets `Released` (the PVC does not exists) and recycled, however the PV is still mounted to a running pod. PVC protection won't help us, because it puts finalizers on PVC that is under user's control and user can remove it. This PR checks that there is no pod that uses a PV before it recycles it. **Release note**: ```release-note NONE ``` /sig storage
419 lines
17 KiB
Go
419 lines
17 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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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/meta"
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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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"k8s.io/client-go/discovery"
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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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"k8s.io/kubernetes/pkg/api/legacyscheme"
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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/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) (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.Options.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 false, nil
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}
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go serviceController.Run(ctx.Stop, int(ctx.Options.ConcurrentServiceSyncs))
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return true, nil
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}
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func startNodeIpamController(ctx ControllerContext) (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.Options.AllocateNodeCIDRs {
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var err error
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if len(strings.TrimSpace(ctx.Options.ClusterCIDR)) != 0 {
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_, clusterCIDR, err = net.ParseCIDR(ctx.Options.ClusterCIDR)
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if err != nil {
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glog.Warningf("Unsuccessful parsing of cluster CIDR %v: %v", ctx.Options.ClusterCIDR, err)
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}
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}
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if len(strings.TrimSpace(ctx.Options.ServiceCIDR)) != 0 {
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_, serviceCIDR, err = net.ParseCIDR(ctx.Options.ServiceCIDR)
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if err != nil {
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glog.Warningf("Unsuccessful parsing of service CIDR %v: %v", ctx.Options.ServiceCIDR, err)
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}
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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.Options.NodeCIDRMaskSize),
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ctx.Options.AllocateNodeCIDRs,
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ipam.CIDRAllocatorType(ctx.Options.CIDRAllocatorType),
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)
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if err != nil {
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return true, err
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}
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go nodeIpamController.Run(ctx.Stop)
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return true, nil
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}
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func startNodeLifecycleController(ctx ControllerContext) (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.Options.NodeMonitorPeriod.Duration,
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ctx.Options.NodeStartupGracePeriod.Duration,
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ctx.Options.NodeMonitorGracePeriod.Duration,
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ctx.Options.PodEvictionTimeout.Duration,
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ctx.Options.NodeEvictionRate,
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ctx.Options.SecondaryNodeEvictionRate,
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ctx.Options.LargeClusterSizeThreshold,
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ctx.Options.UnhealthyZoneThreshold,
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ctx.Options.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 true, err
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}
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go lifecycleController.Run(ctx.Stop)
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return true, nil
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}
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func startRouteController(ctx ControllerContext) (bool, error) {
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if !ctx.Options.AllocateNodeCIDRs || !ctx.Options.ConfigureCloudRoutes {
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glog.Infof("Will not configure cloud provider routes for allocate-node-cidrs: %v, configure-cloud-routes: %v.", ctx.Options.AllocateNodeCIDRs, ctx.Options.ConfigureCloudRoutes)
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return 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 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 false, nil
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}
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_, clusterCIDR, err := net.ParseCIDR(ctx.Options.ClusterCIDR)
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if err != nil {
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glog.Warningf("Unsuccessful parsing of cluster CIDR %v: %v", ctx.Options.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.Options.ClusterName, clusterCIDR)
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go routeController.Run(ctx.Stop, ctx.Options.RouteReconciliationPeriod.Duration)
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return true, nil
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}
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func startPersistentVolumeBinderController(ctx ControllerContext) (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.Options.PVClaimBinderSyncPeriod.Duration,
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VolumePlugins: ProbeControllerVolumePlugins(ctx.Cloud, ctx.Options.VolumeConfiguration),
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Cloud: ctx.Cloud,
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ClusterName: ctx.Options.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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EnableDynamicProvisioning: ctx.Options.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 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 true, nil
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}
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func startAttachDetachController(ctx ControllerContext) (bool, error) {
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if ctx.Options.ReconcilerSyncLoopPeriod.Duration < time.Second {
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return 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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attachDetachController, attachDetachControllerErr :=
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attachdetach.NewAttachDetachController(
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ctx.ClientBuilder.ClientOrDie("attachdetach-controller"),
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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.Options.VolumeConfiguration),
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ctx.Options.DisableAttachDetachReconcilerSync,
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ctx.Options.ReconcilerSyncLoopPeriod.Duration,
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attachdetach.DefaultTimerConfig,
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)
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if attachDetachControllerErr != nil {
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return 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 true, nil
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}
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func startVolumeExpandController(ctx ControllerContext) (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.Options.VolumeConfiguration))
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if expandControllerErr != nil {
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return 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 true, nil
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}
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return false, nil
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}
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func startEndpointController(ctx ControllerContext) (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.Options.ConcurrentEndpointSyncs), ctx.Stop)
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return true, nil
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}
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func startReplicationController(ctx ControllerContext) (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.Options.ConcurrentRCSyncs), ctx.Stop)
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return true, nil
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}
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func startPodGCController(ctx ControllerContext) (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.Options.TerminatedPodGCThreshold),
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).Run(ctx.Stop)
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return true, nil
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}
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func startResourceQuotaController(ctx ControllerContext) (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.Options.ResourceQuotaSyncPeriod.Duration),
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InformerFactory: ctx.InformerFactory,
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ReplenishmentResyncPeriod: ResyncPeriod(&ctx.Options),
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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 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 false, err
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}
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go resourceQuotaController.Run(int(ctx.Options.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 true, nil
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}
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func startNamespaceController(ctx ControllerContext) (bool, error) {
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// TODO: should use a dynamic RESTMapper built from the discovery results.
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restMapper := legacyscheme.Registry.RESTMapper()
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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 *= 10
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nsKubeconfig.Burst *= 10
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namespaceKubeClient := clientset.NewForConfigOrDie(nsKubeconfig)
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namespaceClientPool := dynamic.NewClientPool(nsKubeconfig, restMapper, dynamic.LegacyAPIPathResolverFunc)
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discoverResourcesFn := namespaceKubeClient.Discovery().ServerPreferredNamespacedResources
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namespaceController := namespacecontroller.NewNamespaceController(
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namespaceKubeClient,
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namespaceClientPool,
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discoverResourcesFn,
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ctx.InformerFactory.Core().V1().Namespaces(),
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ctx.Options.NamespaceSyncPeriod.Duration,
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v1.FinalizerKubernetes,
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)
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go namespaceController.Run(int(ctx.Options.ConcurrentNamespaceSyncs), ctx.Stop)
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return true, nil
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}
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func startServiceAccountController(ctx ControllerContext) (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 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 true, nil
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}
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func startTTLController(ctx ControllerContext) (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 true, nil
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}
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func startGarbageCollectorController(ctx ControllerContext) (bool, error) {
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if !ctx.Options.EnableGarbageCollector {
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return false, nil
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}
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gcClientset := ctx.ClientBuilder.ClientOrDie("generic-garbage-collector")
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// Use a discovery client capable of being refreshed.
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discoveryClient := cacheddiscovery.NewMemCacheClient(gcClientset.Discovery())
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restMapper := discovery.NewDeferredDiscoveryRESTMapper(discoveryClient, meta.InterfacesForUnstructured)
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restMapper.Reset()
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config := ctx.ClientBuilder.ConfigOrDie("generic-garbage-collector")
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config.ContentConfig = dynamic.ContentConfig()
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|
// TODO: Make NewMetadataCodecFactory support arbitrary (non-compiled)
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|
// resource types. Otherwise we'll be storing full Unstructured data in our
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|
// caches for custom resources. Consider porting it to work with
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// metav1beta1.PartialObjectMetadata.
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metaOnlyClientPool := dynamic.NewClientPool(config, restMapper, dynamic.LegacyAPIPathResolverFunc)
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clientPool := dynamic.NewClientPool(config, restMapper, dynamic.LegacyAPIPathResolverFunc)
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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.Options.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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metaOnlyClientPool,
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|
clientPool,
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|
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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|
)
|
|
if err != nil {
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|
return 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.Options.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 true, nil
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|
}
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|
|
func startPVCProtectionController(ctx ControllerContext) (bool, error) {
|
|
if utilfeature.DefaultFeatureGate.Enabled(features.StorageProtection) {
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|
go pvcprotection.NewPVCProtectionController(
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|
ctx.InformerFactory.Core().V1().PersistentVolumeClaims(),
|
|
ctx.InformerFactory.Core().V1().Pods(),
|
|
ctx.ClientBuilder.ClientOrDie("pvc-protection-controller"),
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|
).Run(1, ctx.Stop)
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|
return true, nil
|
|
}
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|
return false, nil
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|
}
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|
|
|
func startPVProtectionController(ctx ControllerContext) (bool, error) {
|
|
if utilfeature.DefaultFeatureGate.Enabled(features.StorageProtection) {
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|
go pvprotection.NewPVProtectionController(
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ctx.InformerFactory.Core().V1().PersistentVolumes(),
|
|
ctx.ClientBuilder.ClientOrDie("pv-protection-controller"),
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|
).Run(1, ctx.Stop)
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|
return true, nil
|
|
}
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|
return false, nil
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|
}
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