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provisioner.go
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provisioner.go
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package csi
import (
"context"
"fmt"
"net/http"
"os"
"strconv"
"sync"
"time"
"github.com/container-storage-interface/spec/lib/go/csi"
"github.com/kubernetes-csi/csi-lib-utils/connection"
"github.com/kubernetes-csi/external-provisioner/pkg/capacity"
"github.com/kubernetes-csi/external-provisioner/pkg/capacity/topology"
provisionctrl "github.com/kubernetes-csi/external-provisioner/pkg/controller"
"github.com/kubernetes-csi/external-provisioner/pkg/features"
"github.com/kubernetes-csi/external-provisioner/pkg/owner"
snapclientset "github.com/kubernetes-csi/external-snapshotter/client/v6/clientset/versioned"
"github.com/prometheus/client_golang/prometheus"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/rand"
"k8s.io/apiserver/pkg/util/feature"
"k8s.io/client-go/informers"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/util/workqueue"
csitrans "k8s.io/csi-translation-lib"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/manager"
ctrlRuntimeMetrics "sigs.k8s.io/controller-runtime/pkg/metrics"
"sigs.k8s.io/sig-storage-lib-external-provisioner/v9/controller"
libmetrics "sigs.k8s.io/sig-storage-lib-external-provisioner/v9/controller/metrics"
)
const (
ResyncPeriodOfCsiNodeInformer = 1 * time.Hour
)
type ProvisionerOptions struct {
DriverName string
CSIEndpoint string
CSIOperationTimeout time.Duration
}
type Provisioner struct {
config *rest.Config
client *http.Client
options ProvisionerOptions
}
func (p *Provisioner) NeedLeaderElection() bool {
return true
}
func init() {
ctrlRuntimeMetrics.Registry.MustRegister([]prometheus.Collector{
libmetrics.PersistentVolumeClaimProvisionTotal,
libmetrics.PersistentVolumeClaimProvisionFailedTotal,
libmetrics.PersistentVolumeClaimProvisionDurationSeconds,
libmetrics.PersistentVolumeDeleteTotal,
libmetrics.PersistentVolumeDeleteFailedTotal,
libmetrics.PersistentVolumeDeleteDurationSeconds,
}...)
}
var _ manager.Runnable = &Provisioner{}
var _ manager.LeaderElectionRunnable = &Provisioner{}
func NewProvisioner(mgr manager.Manager, options ProvisionerOptions) *Provisioner {
return &Provisioner{
config: mgr.GetConfig(),
client: mgr.GetHTTPClient(),
options: options,
}
}
func (p *Provisioner) Start(ctx context.Context) error {
logger := log.FromContext(ctx)
onLostConnection := func() bool {
logger.Info("lost connection to csi driver, attempting to reconnect due to in tree provisioning...")
return true
}
grpcClient, err := connection.Connect(p.options.CSIEndpoint, nil,
connection.OnConnectionLoss(onLostConnection),
connection.WithTimeout(p.options.CSIOperationTimeout))
defer grpcClient.Close() //nolint:errcheck,staticcheck
if err != nil {
return err
}
pluginCapabilities, controllerCapabilities, err := provisionctrl.GetDriverCapabilities(grpcClient, p.options.CSIOperationTimeout)
if err != nil {
return err
}
clientset, err := kubernetes.NewForConfigAndClient(p.config, p.client)
if err != nil {
return err
}
snapClient, err := snapclientset.NewForConfigAndClient(p.config, p.client)
if err != nil {
return err
}
// Generate a unique ID for this provisioner
timeStamp := time.Now().UnixNano() / int64(time.Millisecond)
identity := strconv.FormatInt(timeStamp, 10) + "-" + strconv.Itoa(rand.Intn(10000)) + "-" + p.options.DriverName
translator := csitrans.New()
factory := informers.NewSharedInformerFactory(clientset, ResyncPeriodOfCsiNodeInformer)
featureMap := map[string]bool{string(features.Topology): true}
err = feature.DefaultMutableFeatureGate.SetFromMap(featureMap)
if err != nil {
return err
}
scLister := factory.Storage().V1().StorageClasses().Lister()
csiNodeLister := factory.Storage().V1().CSINodes().Lister()
nodeLister := factory.Core().V1().Nodes().Lister()
claimLister := factory.Core().V1().PersistentVolumeClaims().Lister()
vaLister := factory.Storage().V1().VolumeAttachments().Lister()
provisioner := provisionctrl.NewCSIProvisioner(
clientset,
p.options.CSIOperationTimeout,
identity,
"pvc",
-1,
grpcClient,
snapClient,
p.options.DriverName,
pluginCapabilities,
controllerCapabilities,
"",
false,
true,
translator,
scLister,
csiNodeLister,
nodeLister,
claimLister,
vaLister,
nil,
false,
"",
nil,
false,
false,
)
var capacityController *capacity.Controller
namespace := os.Getenv("NAMESPACE")
if namespace == "" {
return fmt.Errorf("need NAMESPACE env variable for CSIStorageCapacity objects")
}
podName := os.Getenv("NAME")
if podName == "" {
return fmt.Errorf("need NAME env variable to determine CSIStorageCapacity owner")
}
controllerRef, err := owner.Lookup(p.config, namespace, podName,
schema.GroupVersionKind{
Group: "",
Version: "v1",
Kind: "Pod",
}, 2)
if err != nil {
return fmt.Errorf("look up owner(s) of pod failed: %w", err)
}
logger.Info(fmt.Sprintf("using %s/%s %s as owner of CSIStorageCapacity objects", controllerRef.APIVersion, controllerRef.Kind, controllerRef.Name))
rateLimiter := workqueue.NewItemExponentialFailureRateLimiter(time.Second, 5*time.Minute)
topologyQueue := workqueue.NewRateLimitingQueueWithConfig(rateLimiter, workqueue.RateLimitingQueueConfig{
Name: "csitopology",
})
topologyInformer := topology.NewNodeTopology(
p.options.DriverName,
clientset,
factory.Core().V1().Nodes(),
factory.Storage().V1().CSINodes(),
topologyQueue,
)
managedByID := "external-provisioner"
factoryForNamespace := informers.NewSharedInformerFactoryWithOptions(clientset,
ResyncPeriodOfCsiNodeInformer,
informers.WithNamespace(namespace),
informers.WithTweakListOptions(func(lo *metav1.ListOptions) {
lo.LabelSelector = labels.Set{
capacity.DriverNameLabel: p.options.DriverName,
capacity.ManagedByLabel: managedByID,
}.AsSelector().String()
}),
)
// We use the V1 CSIStorageCapacity API if available.
clientFactory := capacity.NewV1ClientFactory(clientset)
cInformer := factoryForNamespace.Storage().V1().CSIStorageCapacities()
capacityController = capacity.NewCentralCapacityController(
csi.NewControllerClient(grpcClient),
p.options.DriverName,
clientFactory,
// Metrics for the queue is available in the default registry.
workqueue.NewRateLimitingQueueWithConfig(rateLimiter, workqueue.RateLimitingQueueConfig{
Name: "csistoragecapacity",
}),
controllerRef,
managedByID,
namespace,
topologyInformer,
factory.Storage().V1().StorageClasses(),
cInformer,
time.Minute,
false,
p.options.CSIOperationTimeout,
)
// Wrap Provision and Delete to detect when it is time to refresh capacity.
provisioner = capacity.NewProvisionWrapper(provisioner, capacityController)
claimRateLimiter := workqueue.NewItemExponentialFailureRateLimiter(time.Second, 5*time.Minute)
claimQueue := workqueue.NewRateLimitingQueueWithConfig(claimRateLimiter, workqueue.RateLimitingQueueConfig{
Name: "claims",
})
claimInformer := factory.Core().V1().PersistentVolumeClaims().Informer()
provisionController := controller.NewProvisionController(
clientset,
p.options.DriverName,
provisioner,
controller.LeaderElection(false), // Always disable leader election in provisioner lib. Leader election should be done here in the CSI provisioner level instead.
controller.FailedProvisionThreshold(0),
controller.FailedDeleteThreshold(0),
controller.RateLimiter(rateLimiter),
controller.Threadiness(1),
controller.CreateProvisionedPVLimiter(workqueue.DefaultControllerRateLimiter()),
controller.ClaimsInformer(claimInformer),
controller.NodesLister(nodeLister),
controller.AddFinalizer(true),
)
csiClaimController := provisionctrl.NewCloningProtectionController(
clientset,
claimLister,
claimInformer,
claimQueue,
controllerCapabilities,
)
factory.Start(ctx.Done())
// Starting is enough, the capacity controller will
// wait for sync.
factoryForNamespace.Start(ctx.Done())
cacheSyncResult := factory.WaitForCacheSync(ctx.Done())
for _, v := range cacheSyncResult {
if !v {
return fmt.Errorf("failed to sync Informers")
}
}
var wg sync.WaitGroup
wg.Add(4)
go func() {
defer wg.Done()
topologyInformer.RunWorker(ctx)
logger.Info("topology informer finished shutdown")
}()
go func() {
defer wg.Done()
capacityController.Run(ctx, 1)
logger.Info("capacity controller finished shutdown")
}()
go func() {
defer wg.Done()
csiClaimController.Run(ctx, 1)
logger.Info("csi claim controller finished shutdown")
}()
go func() {
defer wg.Done()
defer topologyQueue.ShutDown()
provisionController.Run(ctx)
logger.Info("provisioner controller finished shutdown")
}()
wg.Wait()
logger.Info("provisioner finished shutdown")
return nil
}