main.go

/*
Copyright 2021.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package main

import (
	"flag"
	"os"

	loggingpipelineplumberv1beta1 "github.com/mrsupiri/logging-pipeline-plumber/pkg/sdk/api/v1beta1"
	"github.com/mrsupiri/logging-pipeline-plumber/pkg/webserver"

	// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
	// to ensure that exec-entrypoint and run can make use of them.
	_ "k8s.io/client-go/plugin/pkg/client/auth"

	"k8s.io/apimachinery/pkg/runtime"
	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/healthz"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"

	loggingoperatorv1beta1 "github.com/banzaicloud/logging-operator/pkg/sdk/api/v1beta1"

	"github.com/mrsupiri/logging-pipeline-plumber/controllers"
	//+kubebuilder:scaffold:imports
)

var (
	scheme   = runtime.NewScheme()
	setupLog = ctrl.Log.WithName("setup")
)

func init() {
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
	utilruntime.Must(loggingoperatorv1beta1.AddToScheme(scheme))

	utilruntime.Must(loggingpipelineplumberv1beta1.AddToScheme(scheme))
	//+kubebuilder:scaffold:scheme
}

func main() {
	var metricsAddr string
	var enableLeaderElection bool
	var probeAddr string
	var webAddr string
	var podSimulatorImage controllers.Image
	var logOutputImage controllers.Image
	var aggregatorNamespace string

	flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
	flag.StringVar(&webAddr, "web-addr", ":9090", "The address the frontend API endpoint binds to.")
	flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")

	flag.StringVar(&aggregatorNamespace, "aggregator-namespace", "default", "AggregatorNamespace where the log aggregator was installed to.")

	flag.StringVar(&podSimulatorImage.Repository, "pod-simulator-image-repository", "ghcr.io/mrsupiri/rancher-logging-pipeline-plumber/pod-simulator", "container image URI for pod simulator")
	flag.StringVar(&podSimulatorImage.Tag, "pod-simulator-image-tag", "latest", "pod simulator container tag")
	flag.StringVar(&podSimulatorImage.PullPolicy, "pod-simulator-image-pull-policy", "IfNotPresent", "pull policy pod simulator container")

	flag.StringVar(&logOutputImage.Repository, "log-output-image-repository", "paynejacob/log-output", "container image URI for log-output")
	flag.StringVar(&logOutputImage.Tag, "log-output-image-tag", "latest", "log-output container tag")
	flag.StringVar(&logOutputImage.PullPolicy, "log-output-image-pull-policy", "IfNotPresent", "pull policy log-output container")

	flag.BoolVar(&enableLeaderElection, "leader-elect", false,
		"Enable leader election for controller manager. "+
			"Enabling this will ensure there is only one active controller manager.")
	opts := zap.Options{
		Development: true,
	}
	opts.BindFlags(flag.CommandLine)
	flag.Parse()

	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:                 scheme,
		MetricsBindAddress:     metricsAddr,
		Port:                   9443,
		HealthProbeBindAddress: probeAddr,
		LeaderElection:         enableLeaderElection,
		LeaderElectionID:       "097ab78d.isala.me",
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	if err = (&controllers.FlowTestReconciler{
		AggregatorNamespace: aggregatorNamespace,
		PodSimulatorImage:   podSimulatorImage,
		LogOutputImage:      logOutputImage,
		Client:              mgr.GetClient(),
		Scheme:              mgr.GetScheme(),
		Recorder:            mgr.GetEventRecorderFor("flowtest-controller"),
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "FlowTest")
		os.Exit(1)
	}
	//+kubebuilder:scaffold:builder
	setupLog.Info("starting web webserver", "addr", webAddr)
	ctx := ctrl.SetupSignalHandler()
	webServer := webserver.NewWebServer(webAddr)
	go webServer.ListenAndServe(ctx.Done())

	if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
		setupLog.Error(err, "unable to set up health check")
		os.Exit(1)
	}
	if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
		setupLog.Error(err, "unable to set up ready check")
		os.Exit(1)
	}

	setupLog.Info("starting manager")
	if err := mgr.Start(ctx); err != nil {
		setupLog.Error(err, "problem running manager")
		os.Exit(1)
	}
}