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register.go
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register.go
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package controllers
import (
"fmt"
"net/http"
"os"
"strings"
"github.com/loft-sh/vcluster/cmd/vclusterctl/cmd"
"github.com/loft-sh/vcluster/pkg/config"
"github.com/loft-sh/vcluster/pkg/controllers/generic"
"github.com/loft-sh/vcluster/pkg/controllers/servicesync"
"github.com/loft-sh/vcluster/pkg/helm"
"github.com/loft-sh/vcluster/pkg/plugin"
"github.com/loft-sh/vcluster/pkg/util/blockingcacheclient"
util "github.com/loft-sh/vcluster/pkg/util/context"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/rest"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/cache"
metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
"github.com/loft-sh/vcluster/pkg/controllers/k8sdefaultendpoint"
"github.com/loft-sh/vcluster/pkg/controllers/manifests"
"github.com/loft-sh/vcluster/pkg/controllers/resources/csidrivers"
"github.com/loft-sh/vcluster/pkg/controllers/resources/csinodes"
"github.com/loft-sh/vcluster/pkg/controllers/resources/csistoragecapacities"
"github.com/loft-sh/vcluster/pkg/controllers/resources/ingressclasses"
"github.com/loft-sh/vcluster/pkg/controllers/resources/namespaces"
"github.com/loft-sh/vcluster/pkg/controllers/resources/serviceaccounts"
"github.com/loft-sh/log"
"github.com/loft-sh/vcluster/cmd/vcluster/context"
"github.com/loft-sh/vcluster/pkg/controllers/coredns"
"github.com/loft-sh/vcluster/pkg/controllers/podsecurity"
"github.com/loft-sh/vcluster/pkg/controllers/resources/configmaps"
"github.com/loft-sh/vcluster/pkg/controllers/resources/endpoints"
"github.com/loft-sh/vcluster/pkg/controllers/resources/events"
"github.com/loft-sh/vcluster/pkg/controllers/resources/ingresses"
"github.com/loft-sh/vcluster/pkg/controllers/resources/networkpolicies"
"github.com/loft-sh/vcluster/pkg/controllers/resources/nodes"
"github.com/loft-sh/vcluster/pkg/controllers/resources/persistentvolumeclaims"
"github.com/loft-sh/vcluster/pkg/controllers/resources/persistentvolumes"
"github.com/loft-sh/vcluster/pkg/controllers/resources/poddisruptionbudgets"
"github.com/loft-sh/vcluster/pkg/controllers/resources/pods"
"github.com/loft-sh/vcluster/pkg/controllers/resources/priorityclasses"
"github.com/loft-sh/vcluster/pkg/controllers/resources/secrets"
"github.com/loft-sh/vcluster/pkg/controllers/resources/services"
"github.com/loft-sh/vcluster/pkg/controllers/resources/storageclasses"
"github.com/loft-sh/vcluster/pkg/controllers/resources/volumesnapshots/volumesnapshotclasses"
"github.com/loft-sh/vcluster/pkg/controllers/resources/volumesnapshots/volumesnapshotcontents"
"github.com/loft-sh/vcluster/pkg/controllers/resources/volumesnapshots/volumesnapshots"
"github.com/loft-sh/vcluster/pkg/controllers/syncer"
synccontext "github.com/loft-sh/vcluster/pkg/controllers/syncer/context"
"github.com/loft-sh/vcluster/pkg/util/loghelper"
"github.com/pkg/errors"
"golang.org/x/sync/errgroup"
)
var ResourceControllers = map[string][]func(*synccontext.RegisterContext) (syncer.Object, error){
"services": {services.New},
"configmaps": {configmaps.New},
"secrets": {secrets.New},
"endpoints": {endpoints.New},
"pods": {pods.New},
"events": {events.New},
"persistentvolumeclaims": {persistentvolumeclaims.New},
"ingresses": {ingresses.New},
"ingressclasses": {ingressclasses.New},
"storageclasses": {storageclasses.New},
"hoststorageclasses": {storageclasses.NewHostStorageClassSyncer},
"priorityclasses": {priorityclasses.New},
"nodes,fake-nodes": {nodes.New},
"poddisruptionbudgets": {poddisruptionbudgets.New},
"networkpolicies": {networkpolicies.New},
"volumesnapshots": {volumesnapshotclasses.New, volumesnapshots.New, volumesnapshotcontents.New},
"serviceaccounts": {serviceaccounts.New},
"csinodes": {csinodes.New},
"csidrivers": {csidrivers.New},
"csistoragecapacities": {csistoragecapacities.New},
"namespaces": {namespaces.New},
"persistentvolumes,fake-persistentvolumes": {persistentvolumes.New},
}
func Create(ctx *context.ControllerContext) ([]syncer.Object, error) {
registerContext := util.ToRegisterContext(ctx)
// register controllers for resource synchronization
syncers := []syncer.Object{}
for k, v := range ResourceControllers {
for _, controllerNew := range v {
controllers := strings.Split(k, ",")
for _, controller := range controllers {
if ctx.Controllers.Has(controller) {
loghelper.Infof("Start %s sync controller", controller)
ctrl, err := controllerNew(registerContext)
if err != nil {
return nil, errors.Wrapf(err, "register %s controller", controller)
}
syncers = append(syncers, ctrl)
break
}
}
}
}
return syncers, nil
}
func ExecuteInitializers(controllerCtx *context.ControllerContext, syncers []syncer.Object) error {
registerContext := util.ToRegisterContext(controllerCtx)
// execute in parallel because each one might be time-consuming
errorGroup, ctx := errgroup.WithContext(controllerCtx.Context)
registerContext.Context = ctx
for _, s := range syncers {
name := s.Name()
initializer, ok := s.(syncer.Initializer)
if ok {
errorGroup.Go(func() error {
err := initializer.Init(registerContext)
if err != nil {
return errors.Wrapf(err, "ensure prerequisites for %s syncer", name)
}
return nil
})
}
}
return errorGroup.Wait()
}
func RegisterIndices(ctx *context.ControllerContext, syncers []syncer.Object) error {
registerContext := util.ToRegisterContext(ctx)
for _, s := range syncers {
indexRegisterer, ok := s.(syncer.IndicesRegisterer)
if ok {
err := indexRegisterer.RegisterIndices(registerContext)
if err != nil {
return errors.Wrapf(err, "register indices for %s syncer", s.Name())
}
}
}
return nil
}
func RegisterControllers(ctx *context.ControllerContext, syncers []syncer.Object) error {
registerContext := util.ToRegisterContext(ctx)
err := k8sdefaultendpoint.Register(ctx)
if err != nil {
return err
}
// register controller that maintains pod security standard check
if ctx.Options.EnforcePodSecurityStandard != "" {
err := RegisterPodSecurityController(ctx)
if err != nil {
return err
}
}
// register controller that keeps CoreDNS NodeHosts config up to date
err = RegisterCoreDNSController(ctx)
if err != nil {
return err
}
// register init manifests configmap watcher controller
err = RegisterInitManifestsController(ctx)
if err != nil {
return err
}
// register service syncer to map services between host and virtual cluster
err = RegisterServiceSyncControllers(ctx)
if err != nil {
return err
}
err = RegisterGenericSyncController(ctx)
if err != nil {
return err
}
// register controllers for resource synchronization
for _, v := range syncers {
// fake syncer?
fakeSyncer, ok := v.(syncer.FakeSyncer)
if ok {
err = syncer.RegisterFakeSyncer(registerContext, fakeSyncer)
if err != nil {
return errors.Wrapf(err, "start %s syncer", v.Name())
}
} else {
// real syncer?
realSyncer, ok := v.(syncer.Syncer)
if ok {
err = syncer.RegisterSyncer(registerContext, realSyncer)
if err != nil {
return errors.Wrapf(err, "start %s syncer", v.Name())
}
} else {
return fmt.Errorf("syncer %s does not implement fake syncer or syncer interface", v.Name())
}
}
}
return nil
}
func RegisterGenericSyncController(ctx *context.ControllerContext) error {
// first check if a generic CRD config is provided and we actually need
// to create any of these syncer controllers
c := os.Getenv(context.GenericConfig)
if strings.TrimSpace(c) == "" || strings.TrimSpace(c) == "---" {
// empty configuration, no need for creating any syncer controllers
loghelper.Infof("no generic config provided, skipping creating controllers")
return nil
}
configuration, err := config.Parse(c)
if err != nil {
loghelper.Infof("error parsing the config %v", err.Error())
return errors.Wrapf(err, "parsing the config")
}
loghelper.Infof("generic config provided, parsed successfully")
err = generic.CreateExporters(ctx, configuration)
if err != nil {
return err
}
err = generic.CreateImporters(ctx, configuration)
if err != nil {
return err
}
return nil
}
func RegisterInitManifestsController(ctx *context.ControllerContext) error {
currentNamespaceManager := ctx.LocalManager
if ctx.Options.TargetNamespace != ctx.CurrentNamespace {
var err error
currentNamespaceManager, err = ctrl.NewManager(ctx.LocalManager.GetConfig(), ctrl.Options{
Scheme: ctx.LocalManager.GetScheme(),
MapperProvider: func(c *rest.Config, httpClient *http.Client) (meta.RESTMapper, error) {
return ctx.LocalManager.GetRESTMapper(), nil
},
Metrics: metricsserver.Options{BindAddress: "0"},
LeaderElection: false,
Cache: cache.Options{DefaultNamespaces: map[string]cache.Config{ctx.CurrentNamespace: {}}},
})
if err != nil {
return err
}
// start the manager
go func() {
err := currentNamespaceManager.Start(ctx.Context)
if err != nil {
panic(err)
}
}()
// Wait for caches to be synced
currentNamespaceManager.GetCache().WaitForCacheSync(ctx.Context)
}
vconfig, err := plugin.ConvertRestConfigToClientConfig(ctx.VirtualManager.GetConfig())
if err != nil {
return err
}
vConfigRaw, err := vconfig.RawConfig()
if err != nil {
return err
}
helmBinaryPath, err := cmd.GetHelmBinaryPath(ctx.Context, log.GetInstance())
if err != nil {
return err
}
controller := &manifests.InitManifestsConfigMapReconciler{
LocalClient: currentNamespaceManager.GetClient(),
Log: loghelper.New("init-manifests-controller"),
VirtualManager: ctx.VirtualManager,
HelmClient: helm.NewClient(&vConfigRaw, log.GetInstance(), helmBinaryPath),
}
err = controller.SetupWithManager(currentNamespaceManager)
if err != nil {
return fmt.Errorf("unable to setup init manifests configmap controller: %w", err)
}
return nil
}
func RegisterServiceSyncControllers(ctx *context.ControllerContext) error {
hostNamespace := ctx.Options.TargetNamespace
if ctx.Options.MultiNamespaceMode {
hostNamespace = ctx.CurrentNamespace
}
if len(ctx.Options.MapHostServices) > 0 {
mapping, err := parseMapping(ctx.Options.MapHostServices, hostNamespace, "")
if err != nil {
return errors.Wrap(err, "parse physical service mapping")
}
// sync we are syncing from arbitrary physical namespaces we need to create a new
// manager that listens on global services
globalLocalManager, err := ctrl.NewManager(ctx.LocalManager.GetConfig(), ctrl.Options{
Scheme: ctx.LocalManager.GetScheme(),
MapperProvider: func(c *rest.Config, httpClient *http.Client) (meta.RESTMapper, error) {
return ctx.LocalManager.GetRESTMapper(), nil
},
Metrics: metricsserver.Options{BindAddress: "0"},
LeaderElection: false,
NewClient: blockingcacheclient.NewCacheClient,
})
if err != nil {
return err
}
// start the manager
go func() {
err := globalLocalManager.Start(ctx.Context)
if err != nil {
panic(err)
}
}()
// Wait for caches to be synced
globalLocalManager.GetCache().WaitForCacheSync(ctx.Context)
// register controller
controller := &servicesync.ServiceSyncer{
SyncServices: mapping,
CreateNamespace: true,
CreateEndpoints: true,
From: globalLocalManager,
To: ctx.VirtualManager,
Log: loghelper.New("map-host-service-syncer"),
}
err = controller.Register()
if err != nil {
return errors.Wrap(err, "register physical service sync controller")
}
}
if len(ctx.Options.MapVirtualServices) > 0 {
mapping, err := parseMapping(ctx.Options.MapVirtualServices, "", hostNamespace)
if err != nil {
return errors.Wrap(err, "parse physical service mapping")
}
controller := &servicesync.ServiceSyncer{
SyncServices: mapping,
IsVirtualToHostSyncer: true,
From: ctx.VirtualManager,
To: ctx.LocalManager,
Log: loghelper.New("map-virtual-service-syncer"),
}
if ctx.Options.MultiNamespaceMode {
controller.CreateEndpoints = true
}
err = controller.Register()
if err != nil {
return errors.Wrap(err, "register virtual service sync controller")
}
}
return nil
}
func parseMapping(mappings []string, fromDefaultNamespace, toDefaultNamespace string) (map[string]types.NamespacedName, error) {
ret := map[string]types.NamespacedName{}
for _, m := range mappings {
splitted := strings.Split(m, "=")
if len(splitted) != 2 {
return nil, fmt.Errorf("invalid service mapping, please use namespace1/service1=service2")
} else if len(splitted[0]) == 0 || len(splitted[1]) == 0 {
return nil, fmt.Errorf("invalid service mapping, please use namespace1/service1=service2")
}
fromSplitted := strings.Split(splitted[0], "/")
if len(fromSplitted) == 1 {
if fromDefaultNamespace == "" {
return nil, fmt.Errorf("invalid service mapping, please use namespace1/service1=service2")
}
splitted[0] = fromDefaultNamespace + "/" + splitted[0]
} else if len(fromSplitted) != 2 {
return nil, fmt.Errorf("invalid service mapping, please use namespace1/service1=service2")
}
toSplitted := strings.Split(splitted[1], "/")
if len(toSplitted) == 1 {
if toDefaultNamespace == "" {
return nil, fmt.Errorf("invalid service mapping, please use namespace1/service1=namespace2/service2")
}
ret[splitted[0]] = types.NamespacedName{
Namespace: toDefaultNamespace,
Name: splitted[1],
}
} else if len(toSplitted) == 2 {
if toDefaultNamespace != "" {
return nil, fmt.Errorf("invalid service mapping, please use namespace1/service1=service2")
}
ret[splitted[0]] = types.NamespacedName{
Namespace: toSplitted[0],
Name: toSplitted[1],
}
} else {
return nil, fmt.Errorf("invalid service mapping, please use namespace1/service1=service2")
}
}
return ret, nil
}
func RegisterCoreDNSController(ctx *context.ControllerContext) error {
controller := &coredns.NodeHostsReconciler{
Client: ctx.VirtualManager.GetClient(),
Log: loghelper.New("corednsnodehosts-controller"),
}
err := controller.SetupWithManager(ctx.VirtualManager)
if err != nil {
return fmt.Errorf("unable to setup CoreDNS NodeHosts controller: %w", err)
}
return nil
}
func RegisterPodSecurityController(ctx *context.ControllerContext) error {
controller := &podsecurity.Reconciler{
Client: ctx.VirtualManager.GetClient(),
PodSecurityStandard: ctx.Options.EnforcePodSecurityStandard,
Log: loghelper.New("podSecurity-controller"),
}
err := controller.SetupWithManager(ctx.VirtualManager)
if err != nil {
return fmt.Errorf("unable to setup pod security controller: %w", err)
}
return nil
}