/
main.go
170 lines (142 loc) · 5.25 KB
/
main.go
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// Unless explicitly stated otherwise all files in this repository are licensed
// under the Apache License Version 2.0.
// This product includes software developed at Datadog (https://www.datadoghq.com/).
// Copyright 2016-2019 Datadog, Inc.
package main
import (
"flag"
"fmt"
"net/http"
"os"
goruntime "runtime"
"k8s.io/apimachinery/pkg/runtime"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
apiregistrationv1 "k8s.io/kube-aggregator/pkg/apis/apiregistration/v1"
ctrl "sigs.k8s.io/controller-runtime"
ctrlzap "sigs.k8s.io/controller-runtime/pkg/log/zap"
"sigs.k8s.io/controller-runtime/pkg/manager"
datadoghqv1alpha1 "github.com/DataDog/datadog-operator/api/v1alpha1"
"github.com/DataDog/datadog-operator/controllers"
"github.com/DataDog/datadog-operator/pkg/controller/debug"
"github.com/DataDog/datadog-operator/pkg/secrets"
"github.com/DataDog/datadog-operator/pkg/version"
edsdatadoghqv1alpha1 "github.com/DataDog/extendeddaemonset/api/v1alpha1"
"github.com/DataDog/extendeddaemonset/pkg/controller/metrics"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
// +kubebuilder:scaffold:imports
)
const (
maximumGoroutines = 200
)
var (
scheme = runtime.NewScheme()
setupLog = ctrl.Log.WithName("setup")
)
func init() {
utilruntime.Must(clientgoscheme.AddToScheme(scheme))
utilruntime.Must(apiregistrationv1.AddToScheme(scheme))
utilruntime.Must(datadoghqv1alpha1.AddToScheme(scheme))
utilruntime.Must(edsdatadoghqv1alpha1.AddToScheme(scheme))
// +kubebuilder:scaffold:scheme
}
func main() {
var metricsAddr string
var enableLeaderElection bool
flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
flag.BoolVar(&enableLeaderElection, "enable-leader-election", true,
"Enable leader election for controller manager. Enabling this will ensure there is only one active controller manager.")
// Custom flags
var printVersion, pprofActive, supportExtendedDaemonset bool
var logEncoder, secretBackendCommand string
flag.StringVar(&logEncoder, "logEncoder", "json", "log encoding ('json' or 'console')")
flag.StringVar(&secretBackendCommand, "secretBackendCommand", "", "Secret backend command")
logLevel := zap.LevelFlag("loglevel", zapcore.InfoLevel, "Set log level")
flag.BoolVar(&printVersion, "version", false, "Print version and exit")
flag.BoolVar(&pprofActive, "pprof", false, "Enable pprof endpoint")
flag.BoolVar(&supportExtendedDaemonset, "supportExtendedDaemonset", false, "Support usage of Datadog ExtendedDaemonset CRD.")
// Parsing flags
flag.Parse()
// Logging setup
if err := customSetupLogging(*logLevel, logEncoder); err != nil {
setupLog.Error(err, "unable to setup the logger")
os.Exit(1)
}
// Print version information
if printVersion {
version.PrintVersionWriter(os.Stdout, "text")
os.Exit(0)
}
version.PrintVersionLogs(setupLog)
// Dispatch CLI flags to each package
secrets.SetSecretBackendCommand(secretBackendCommand)
mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
Scheme: scheme,
MetricsBindAddress: metricsAddr,
HealthProbeBindAddress: ":8081",
Port: 9443,
LeaderElection: enableLeaderElection,
LeaderElectionID: "datadog-operator-lock",
})
if err != nil {
setupLog.Error(err, "unable to start manager")
os.Exit(1)
}
// Custom setup
customSetupHealthChecks(mgr)
customSetupEndpoints(pprofActive, mgr)
// Get some information about Kubernetes version
if err := controllers.SetupControllers(mgr, supportExtendedDaemonset); err != nil {
setupLog.Error(err, "unable to start controllers")
os.Exit(1)
}
// +kubebuilder:scaffold:builder
setupLog.Info("starting manager")
if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
setupLog.Error(err, "problem running manager")
os.Exit(1)
}
}
func customSetupLogging(logLevel zapcore.Level, logEncoder string) error {
encoderConfig := zap.NewProductionEncoderConfig()
encoderConfig.EncodeLevel = zapcore.CapitalLevelEncoder
encoderConfig.EncodeTime = zapcore.RFC3339TimeEncoder
var encoder zapcore.Encoder
switch logEncoder {
case "console":
encoder = zapcore.NewConsoleEncoder(encoderConfig)
case "json":
encoder = zapcore.NewJSONEncoder(encoderConfig)
default:
return fmt.Errorf("unknow log encoder: %s", logEncoder)
}
ctrl.SetLogger(ctrlzap.New(
ctrlzap.Encoder(encoder),
ctrlzap.Level(logLevel),
ctrlzap.StacktraceLevel(zapcore.PanicLevel)),
)
return nil
}
func customSetupHealthChecks(mgr manager.Manager) {
err := mgr.AddHealthzCheck("goroutines-number", func(req *http.Request) error {
if goruntime.NumGoroutine() > maximumGoroutines {
return fmt.Errorf("too much goroutines: %d > limit: %d", goruntime.NumGoroutine(), maximumGoroutines)
}
return nil
})
if err != nil {
setupLog.Error(err, "Unable to add healthchecks")
}
}
func customSetupEndpoints(pprofActive bool, mgr manager.Manager) {
if pprofActive {
if err := debug.RegisterEndpoint(mgr.AddMetricsExtraHandler, nil); err != nil {
setupLog.Error(err, "Unable to register pprof endpoint")
}
}
if err := metrics.RegisterEndpoint(mgr, mgr.AddMetricsExtraHandler); err != nil {
setupLog.Error(err, "Unable to register custom metrics endpoints")
}
}