304 lines
10 KiB
Go
304 lines
10 KiB
Go
/*
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Copyright 2020 The Flux 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 main
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import (
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"fmt"
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"os"
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"time"
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"github.com/dgraph-io/badger/v3"
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flag "github.com/spf13/pflag"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/runtime"
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utilruntime "k8s.io/apimachinery/pkg/util/runtime"
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clientgoscheme "k8s.io/client-go/kubernetes/scheme"
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_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
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"k8s.io/utils/pointer"
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ctrl "sigs.k8s.io/controller-runtime"
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ctrlcache "sigs.k8s.io/controller-runtime/pkg/cache"
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ctrlclient "sigs.k8s.io/controller-runtime/pkg/client"
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"sigs.k8s.io/controller-runtime/pkg/config"
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ctrlmetrics "sigs.k8s.io/controller-runtime/pkg/metrics"
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metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
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"github.com/fluxcd/pkg/auth"
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pkgcache "github.com/fluxcd/pkg/cache"
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"github.com/fluxcd/pkg/runtime/acl"
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"github.com/fluxcd/pkg/runtime/client"
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helper "github.com/fluxcd/pkg/runtime/controller"
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"github.com/fluxcd/pkg/runtime/events"
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feathelper "github.com/fluxcd/pkg/runtime/features"
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"github.com/fluxcd/pkg/runtime/leaderelection"
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"github.com/fluxcd/pkg/runtime/logger"
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"github.com/fluxcd/pkg/runtime/metrics"
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"github.com/fluxcd/pkg/runtime/pprof"
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"github.com/fluxcd/pkg/runtime/probes"
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// +kubebuilder:scaffold:imports
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imagev1 "github.com/fluxcd/image-reflector-controller/api/v1beta2"
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"github.com/fluxcd/image-reflector-controller/internal/controller"
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"github.com/fluxcd/image-reflector-controller/internal/database"
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"github.com/fluxcd/image-reflector-controller/internal/features"
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"github.com/fluxcd/image-reflector-controller/internal/registry"
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)
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const (
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controllerName = "image-reflector-controller"
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discardRatio = 0.7
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)
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var (
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scheme = runtime.NewScheme()
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setupLog = ctrl.Log.WithName("setup")
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)
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func init() {
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utilruntime.Must(clientgoscheme.AddToScheme(scheme))
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utilruntime.Must(imagev1.AddToScheme(scheme))
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// +kubebuilder:scaffold:scheme
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}
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func main() {
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const (
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tokenCacheDefaultMaxSize = 100
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)
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var (
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metricsAddr string
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eventsAddr string
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healthAddr string
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clientOptions client.Options
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logOptions logger.Options
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leaderElectionOptions leaderelection.Options
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watchOptions helper.WatchOptions
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storagePath string
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storageValueLogFileSize int64
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gcInterval uint16 // max value is 65535 minutes (~ 45 days) which is well under the maximum time.Duration
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concurrent int
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aclOptions acl.Options
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rateLimiterOptions helper.RateLimiterOptions
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featureGates feathelper.FeatureGates
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tokenCacheOptions pkgcache.TokenFlags
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defaultServiceAccount string
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)
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flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
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flag.StringVar(&eventsAddr, "events-addr", "", "The address of the events receiver.")
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flag.StringVar(&healthAddr, "health-addr", ":9440", "The address the health endpoint binds to.")
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flag.StringVar(&storagePath, "storage-path", "/data", "Where to store the persistent database of image metadata")
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flag.Int64Var(&storageValueLogFileSize, "storage-value-log-file-size", 1<<28, "Set the database's memory mapped value log file size in bytes. Effective memory usage is about two times this size.")
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flag.Uint16Var(&gcInterval, "gc-interval", 10, "The number of minutes to wait between garbage collections. 0 disables the garbage collector.")
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flag.IntVar(&concurrent, "concurrent", 4, "The number of concurrent resource reconciles.")
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clientOptions.BindFlags(flag.CommandLine)
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logOptions.BindFlags(flag.CommandLine)
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leaderElectionOptions.BindFlags(flag.CommandLine)
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aclOptions.BindFlags(flag.CommandLine)
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rateLimiterOptions.BindFlags(flag.CommandLine)
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featureGates.BindFlags(flag.CommandLine)
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watchOptions.BindFlags(flag.CommandLine)
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tokenCacheOptions.BindFlags(flag.CommandLine, tokenCacheDefaultMaxSize)
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flag.StringVar(&defaultServiceAccount, auth.ControllerFlagDefaultServiceAccount,
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"", "Default service account to use for workload identity when not specified in resources.")
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flag.Parse()
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logger.SetLogger(logger.NewLogger(logOptions))
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if defaultServiceAccount != "" {
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auth.SetDefaultServiceAccount(defaultServiceAccount)
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}
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if err := featureGates.WithLogger(setupLog).SupportedFeatures(features.FeatureGates()); err != nil {
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setupLog.Error(err, "unable to load feature gates")
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os.Exit(1)
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}
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switch enabled, err := features.Enabled(auth.FeatureGateObjectLevelWorkloadIdentity); {
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case err != nil:
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setupLog.Error(err, "unable to check feature gate "+auth.FeatureGateObjectLevelWorkloadIdentity)
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os.Exit(1)
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case enabled:
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auth.EnableObjectLevelWorkloadIdentity()
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}
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if auth.InconsistentObjectLevelConfiguration() {
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setupLog.Error(auth.ErrInconsistentObjectLevelConfiguration, "invalid configuration")
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os.Exit(1)
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}
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badgerOpts := badger.DefaultOptions(storagePath)
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badgerOpts.ValueLogFileSize = storageValueLogFileSize
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badgerDB, err := badger.Open(badgerOpts)
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if err != nil {
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setupLog.Error(err, "unable to open the Badger database")
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os.Exit(1)
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}
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defer badgerDB.Close()
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db := database.NewBadgerDatabase(badgerDB)
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var badgerGC *database.BadgerGarbageCollector
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if gcInterval > 0 {
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badgerGC = database.NewBadgerGarbageCollector("badger-gc", badgerDB, time.Duration(gcInterval)*time.Minute, discardRatio)
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} else {
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setupLog.V(1).Info("Badger garbage collector is disabled")
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}
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watchNamespace := ""
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if !watchOptions.AllNamespaces {
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watchNamespace = os.Getenv("RUNTIME_NAMESPACE")
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}
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var disableCacheFor []ctrlclient.Object
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shouldCache, err := features.Enabled(features.CacheSecretsAndConfigMaps)
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if err != nil {
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setupLog.Error(err, "unable to check feature gate "+features.CacheSecretsAndConfigMaps)
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os.Exit(1)
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}
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if !shouldCache {
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disableCacheFor = append(disableCacheFor, &corev1.Secret{}, &corev1.ConfigMap{})
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}
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restConfig := client.GetConfigOrDie(clientOptions)
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watchSelector, err := helper.GetWatchSelector(watchOptions)
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if err != nil {
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setupLog.Error(err, "unable to configure watch label selector for manager")
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os.Exit(1)
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}
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leaderElectionID := fmt.Sprintf("%s-leader-election", controllerName)
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if watchOptions.LabelSelector != "" {
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leaderElectionID = leaderelection.GenerateID(leaderElectionID, watchOptions.LabelSelector)
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}
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mgrConfig := ctrl.Options{
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Scheme: scheme,
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HealthProbeBindAddress: healthAddr,
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LeaderElection: leaderElectionOptions.Enable,
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LeaderElectionReleaseOnCancel: leaderElectionOptions.ReleaseOnCancel,
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LeaseDuration: &leaderElectionOptions.LeaseDuration,
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Logger: ctrl.Log,
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RenewDeadline: &leaderElectionOptions.RenewDeadline,
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RetryPeriod: &leaderElectionOptions.RetryPeriod,
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LeaderElectionID: leaderElectionID,
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Client: ctrlclient.Options{
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Cache: &ctrlclient.CacheOptions{
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DisableFor: disableCacheFor,
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},
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},
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Cache: ctrlcache.Options{
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ByObject: map[ctrlclient.Object]ctrlcache.ByObject{
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&imagev1.ImageRepository{}: {Label: watchSelector},
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&imagev1.ImagePolicy{}: {Label: watchSelector},
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},
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},
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Metrics: metricsserver.Options{
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BindAddress: metricsAddr,
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ExtraHandlers: pprof.GetHandlers(),
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},
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Controller: config.Controller{
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RecoverPanic: pointer.Bool(true),
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MaxConcurrentReconciles: concurrent,
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},
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}
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if watchNamespace != "" {
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mgrConfig.Cache.DefaultNamespaces = map[string]ctrlcache.Config{
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watchNamespace: ctrlcache.Config{},
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}
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}
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mgr, err := ctrl.NewManager(restConfig, mgrConfig)
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if err != nil {
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setupLog.Error(err, "unable to start manager")
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os.Exit(1)
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}
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if badgerGC != nil {
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mgr.Add(badgerGC)
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}
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probes.SetupChecks(mgr, setupLog)
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var eventRecorder *events.Recorder
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if eventRecorder, err = events.NewRecorder(mgr, ctrl.Log, eventsAddr, controllerName); err != nil {
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setupLog.Error(err, "unable to create event recorder")
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os.Exit(1)
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}
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metricsH := helper.NewMetrics(mgr, metrics.MustMakeRecorder(), imagev1.ImageFinalizer)
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var tokenCache *pkgcache.TokenCache
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if tokenCacheOptions.MaxSize > 0 {
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var err error
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tokenCache, err = pkgcache.NewTokenCache(tokenCacheOptions.MaxSize,
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pkgcache.WithMaxDuration(tokenCacheOptions.MaxDuration),
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pkgcache.WithMetricsRegisterer(ctrlmetrics.Registry),
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pkgcache.WithMetricsPrefix("gotk_token_"))
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if err != nil {
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setupLog.Error(err, "unable to create token cache")
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os.Exit(1)
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}
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}
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authOptionsGetter := ®istry.AuthOptionsGetter{
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Client: mgr.GetClient(),
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TokenCache: tokenCache,
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}
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if err := (&controller.ImageRepositoryReconciler{
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Client: mgr.GetClient(),
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EventRecorder: eventRecorder,
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Metrics: metricsH,
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Database: db,
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ControllerName: controllerName,
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TokenCache: tokenCache,
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AuthOptionsGetter: authOptionsGetter,
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}).SetupWithManager(mgr, controller.ImageRepositoryReconcilerOptions{
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RateLimiter: helper.GetRateLimiter(rateLimiterOptions),
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}); err != nil {
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setupLog.Error(err, "unable to create controller", "controller", imagev1.ImageRepositoryKind)
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os.Exit(1)
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}
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if err := (&controller.ImagePolicyReconciler{
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Client: mgr.GetClient(),
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EventRecorder: eventRecorder,
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Metrics: metricsH,
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Database: db,
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ACLOptions: aclOptions,
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ControllerName: controllerName,
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AuthOptionsGetter: authOptionsGetter,
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TokenCache: tokenCache,
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}).SetupWithManager(mgr, controller.ImagePolicyReconcilerOptions{
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RateLimiter: helper.GetRateLimiter(rateLimiterOptions),
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}); err != nil {
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setupLog.Error(err, "unable to create controller", "controller", imagev1.ImagePolicyKind)
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os.Exit(1)
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}
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// +kubebuilder:scaffold:builder
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setupLog.Info("starting manager")
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if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
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setupLog.Error(err, "problem running manager")
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os.Exit(1)
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}
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}
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