227 lines
8.2 KiB
Go
227 lines
8.2 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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"github.com/fluxcd/helm-controller/internal/oomwatch"
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"os"
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"time"
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flag "github.com/spf13/pflag"
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"helm.sh/helm/v3/pkg/kube"
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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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"sigs.k8s.io/cli-utils/pkg/kstatus/polling"
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ctrl "sigs.k8s.io/controller-runtime"
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ctrlclient "sigs.k8s.io/controller-runtime/pkg/client"
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crtlmetrics "sigs.k8s.io/controller-runtime/pkg/metrics"
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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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"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/v1beta2"
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corev1 "k8s.io/api/core/v1"
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v2 "github.com/fluxcd/helm-controller/api/v2beta1"
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"github.com/fluxcd/helm-controller/controllers"
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"github.com/fluxcd/helm-controller/internal/features"
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intkube "github.com/fluxcd/helm-controller/internal/kube"
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feathelper "github.com/fluxcd/pkg/runtime/features"
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// +kubebuilder:scaffold:imports
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)
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const controllerName = "helm-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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utilruntime.Must(clientgoscheme.AddToScheme(scheme))
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utilruntime.Must(sourcev1.AddToScheme(scheme))
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utilruntime.Must(v2.AddToScheme(scheme))
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// +kubebuilder:scaffold:scheme
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}
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func main() {
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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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requeueDependency time.Duration
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gracefulShutdownTimeout time.Duration
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watchAllNamespaces bool
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httpRetry int
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clientOptions client.Options
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kubeConfigOpts client.KubeConfigOptions
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featureGates feathelper.FeatureGates
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logOptions logger.Options
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aclOptions acl.Options
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leaderElectionOptions leaderelection.Options
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rateLimiterOptions helper.RateLimiterOptions
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oomWatchInterval time.Duration
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oomWatchMemoryThreshold float64
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)
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flag.StringVar(&metricsAddr, "metrics-addr", ":8080",
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"The address the metric endpoint binds to.")
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flag.StringVar(&eventsAddr, "events-addr", "",
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"The address of the events receiver.")
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flag.StringVar(&healthAddr, "health-addr", ":9440",
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"The address the health endpoint binds to.")
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flag.IntVar(&concurrent, "concurrent", 4,
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"The number of concurrent HelmRelease reconciles.")
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flag.DurationVar(&requeueDependency, "requeue-dependency", 30*time.Second,
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"The interval at which failing dependencies are reevaluated.")
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flag.DurationVar(&gracefulShutdownTimeout, "graceful-shutdown-timeout", 600*time.Second,
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"The duration given to the reconciler to finish before forcibly stopping.")
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flag.BoolVar(&watchAllNamespaces, "watch-all-namespaces", true,
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"Watch for custom resources in all namespaces, if set to false it will only watch the runtime namespace.")
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flag.IntVar(&httpRetry, "http-retry", 9,
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"The maximum number of retries when failing to fetch artifacts over HTTP.")
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flag.StringVar(&intkube.DefaultServiceAccountName, "default-service-account", "",
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"Default service account used for impersonation.")
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flag.Float64Var(&oomWatchMemoryThreshold, "oom-watch-memory-threshold", 95,
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"The memory threshold in percentage at which the OOM watcher will trigger a graceful shutdown. Requires feature gate 'OOMWatch' to be enabled.")
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flag.DurationVar(&oomWatchInterval, "oom-watch-interval", 500*time.Millisecond,
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"The interval at which the OOM watcher will check for memory usage. Requires feature gate 'OOMWatch' to be enabled.")
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clientOptions.BindFlags(flag.CommandLine)
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logOptions.BindFlags(flag.CommandLine)
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aclOptions.BindFlags(flag.CommandLine)
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leaderElectionOptions.BindFlags(flag.CommandLine)
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rateLimiterOptions.BindFlags(flag.CommandLine)
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kubeConfigOpts.BindFlags(flag.CommandLine)
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featureGates.BindFlags(flag.CommandLine)
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flag.Parse()
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ctrl.SetLogger(logger.NewLogger(logOptions))
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err := featureGates.WithLogger(setupLog).
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SupportedFeatures(features.FeatureGates())
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if 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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metricsRecorder := metrics.NewRecorder()
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crtlmetrics.Registry.MustRegister(metricsRecorder.Collectors()...)
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watchNamespace := ""
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if !watchAllNamespaces {
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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 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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// set the managedFields owner for resources reconciled from Helm charts
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kube.ManagedFieldsManager = controllerName
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restConfig := client.GetConfigOrDie(clientOptions)
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mgr, err := ctrl.NewManager(restConfig, ctrl.Options{
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Scheme: scheme,
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MetricsBindAddress: metricsAddr,
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HealthProbeBindAddress: healthAddr,
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Port: 9443,
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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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GracefulShutdownTimeout: &gracefulShutdownTimeout,
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LeaderElectionID: fmt.Sprintf("%s-leader-election", controllerName),
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Namespace: watchNamespace,
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Logger: ctrl.Log,
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ClientDisableCacheFor: disableCacheFor,
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})
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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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pprof.SetupHandlers(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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pollingOpts := polling.Options{}
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if err = (&controllers.HelmReleaseReconciler{
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Client: mgr.GetClient(),
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Config: mgr.GetConfig(),
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Scheme: mgr.GetScheme(),
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EventRecorder: eventRecorder,
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MetricsRecorder: metricsRecorder,
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NoCrossNamespaceRef: aclOptions.NoCrossNamespaceRefs,
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ClientOpts: clientOptions,
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KubeConfigOpts: kubeConfigOpts,
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PollingOpts: pollingOpts,
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StatusPoller: polling.NewStatusPoller(mgr.GetClient(), mgr.GetRESTMapper(), pollingOpts),
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ControllerName: controllerName,
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}).SetupWithManager(mgr, controllers.HelmReleaseReconcilerOptions{
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MaxConcurrentReconciles: concurrent,
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DependencyRequeueInterval: requeueDependency,
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HTTPRetry: httpRetry,
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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", v2.HelmReleaseKind)
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os.Exit(1)
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}
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// +kubebuilder:scaffold:builder
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ctx := ctrl.SetupSignalHandler()
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if ok, _ := features.Enabled(features.OOMWatch); ok {
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setupLog.Info("setting up OOM watcher")
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ow, err := oomwatch.NewDefault(oomWatchMemoryThreshold, oomWatchInterval, ctrl.Log.WithName("OOMwatch"))
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if err != nil {
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setupLog.Error(err, "unable to setup OOM watcher")
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os.Exit(1)
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}
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ctx = ow.Watch(ctx)
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}
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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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