298 lines
10 KiB
Go
298 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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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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clientgoscheme "k8s.io/client-go/kubernetes/scheme"
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_ "k8s.io/client-go/plugin/pkg/client/auth/azure"
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_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
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"k8s.io/utils/ptr"
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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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ctrlcfg "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/cli-utils/pkg/kstatus/polling/clusterreader"
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"github.com/fluxcd/cli-utils/pkg/kstatus/polling/engine"
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pkgcache "github.com/fluxcd/pkg/cache"
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"github.com/fluxcd/pkg/runtime/acl"
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runtimeClient "github.com/fluxcd/pkg/runtime/client"
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runtimeCtrl "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/jitter"
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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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sourcev1 "github.com/fluxcd/source-controller/api/v1"
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sourcev1b2 "github.com/fluxcd/source-controller/api/v1beta2"
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kustomizev1 "github.com/fluxcd/kustomize-controller/api/v1"
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"github.com/fluxcd/kustomize-controller/internal/controller"
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"github.com/fluxcd/kustomize-controller/internal/features"
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// +kubebuilder:scaffold:imports
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)
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const controllerName = "kustomize-controller"
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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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_ = clientgoscheme.AddToScheme(scheme)
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_ = sourcev1.AddToScheme(scheme)
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_ = sourcev1b2.AddToScheme(scheme)
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_ = kustomizev1.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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concurrent int
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concurrentSSA int
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requeueDependency time.Duration
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clientOptions runtimeClient.Options
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kubeConfigOpts runtimeClient.KubeConfigOptions
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logOptions logger.Options
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leaderElectionOptions leaderelection.Options
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rateLimiterOptions runtimeCtrl.RateLimiterOptions
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watchOptions runtimeCtrl.WatchOptions
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intervalJitterOptions jitter.IntervalOptions
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aclOptions acl.Options
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noRemoteBases bool
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httpRetry int
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defaultServiceAccount string
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featureGates feathelper.FeatureGates
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disallowedFieldManagers []string
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tokenCacheOptions pkgcache.TokenFlags
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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.IntVar(&concurrent, "concurrent", 4, "The number of concurrent kustomize reconciles.")
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flag.IntVar(&concurrentSSA, "concurrent-ssa", 4, "The number of concurrent server-side apply operations.")
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flag.DurationVar(&requeueDependency, "requeue-dependency", 30*time.Second, "The interval at which failing dependencies are reevaluated.")
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flag.BoolVar(&noRemoteBases, "no-remote-bases", false,
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"Disallow remote bases usage in Kustomize overlays. When this flag is enabled, all resources must refer to local files included in the source artifact.")
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flag.IntVar(&httpRetry, "http-retry", 9, "The maximum number of retries when failing to fetch artifacts over HTTP.")
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flag.StringVar(&defaultServiceAccount, "default-service-account", "", "Default service account used for impersonation.")
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flag.StringArrayVar(&disallowedFieldManagers, "override-manager", []string{}, "Field manager disallowed to perform changes on managed resources.")
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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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kubeConfigOpts.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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intervalJitterOptions.BindFlags(flag.CommandLine)
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tokenCacheOptions.BindFlags(flag.CommandLine, tokenCacheDefaultMaxSize)
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flag.Parse()
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logger.SetLogger(logger.NewLogger(logOptions))
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ctx := ctrl.SetupSignalHandler()
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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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if err := intervalJitterOptions.SetGlobalJitter(nil); err != nil {
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setupLog.Error(err, "unable to set global jitter")
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os.Exit(1)
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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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watchSelector, err := runtimeCtrl.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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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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leaderElectionId := fmt.Sprintf("%s-%s", controllerName, "leader-election")
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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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restConfig := runtimeClient.GetConfigOrDie(clientOptions)
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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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RenewDeadline: &leaderElectionOptions.RenewDeadline,
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RetryPeriod: &leaderElectionOptions.RetryPeriod,
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LeaderElectionID: leaderElectionId,
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Logger: ctrl.Log,
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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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&kustomizev1.Kustomization{}: {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: ctrlcfg.Controller{
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MaxConcurrentReconciles: concurrent,
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RecoverPanic: ptr.To(true),
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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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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 := runtimeCtrl.NewMetrics(mgr, metrics.MustMakeRecorder(), kustomizev1.KustomizationFinalizer)
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restMapper, err := runtimeClient.NewDynamicRESTMapper(mgr.GetConfig())
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if err != nil {
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setupLog.Error(err, "unable to create REST mapper")
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os.Exit(1)
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}
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var clusterReader engine.ClusterReaderFactory
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if ok, _ := features.Enabled(features.DisableStatusPollerCache); ok {
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clusterReader = engine.ClusterReaderFactoryFunc(clusterreader.NewDirectClusterReader)
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}
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failFast := true
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if ok, _ := features.Enabled(features.DisableFailFastBehavior); ok {
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failFast = false
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}
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strictSubstitutions, err := features.Enabled(features.StrictPostBuildSubstitutions)
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if err != nil {
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setupLog.Error(err, "unable to check feature gate "+features.StrictPostBuildSubstitutions)
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os.Exit(1)
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}
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groupChangeLog, err := features.Enabled(features.GroupChangeLog)
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if err != nil {
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setupLog.Error(err, "unable to check feature gate "+features.GroupChangeLog)
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os.Exit(1)
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}
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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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if err = (&controller.KustomizationReconciler{
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ControllerName: controllerName,
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DefaultServiceAccount: defaultServiceAccount,
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Client: mgr.GetClient(),
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Mapper: restMapper,
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APIReader: mgr.GetAPIReader(),
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Metrics: metricsH,
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EventRecorder: eventRecorder,
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NoCrossNamespaceRefs: aclOptions.NoCrossNamespaceRefs,
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NoRemoteBases: noRemoteBases,
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FailFast: failFast,
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ConcurrentSSA: concurrentSSA,
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KubeConfigOpts: kubeConfigOpts,
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ClusterReader: clusterReader,
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DisallowedFieldManagers: disallowedFieldManagers,
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StrictSubstitutions: strictSubstitutions,
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GroupChangeLog: groupChangeLog,
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TokenCache: tokenCache,
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}).SetupWithManager(ctx, mgr, controller.KustomizationReconcilerOptions{
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DependencyRequeueInterval: requeueDependency,
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HTTPRetry: httpRetry,
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RateLimiter: runtimeCtrl.GetRateLimiter(rateLimiterOptions),
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}); err != nil {
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setupLog.Error(err, "unable to create controller", "controller", controllerName)
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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(ctx); 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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