package main import ( "context" "flag" "fmt" "os" "runtime" // Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.) _ "k8s.io/client-go/plugin/pkg/client/auth" "k8s.io/client-go/rest" "collectd-operator/pkg/apis" "collectd-operator/pkg/controller" "github.com/operator-framework/operator-sdk/pkg/k8sutil" kubemetrics "github.com/operator-framework/operator-sdk/pkg/kube-metrics" "github.com/operator-framework/operator-sdk/pkg/leader" "github.com/operator-framework/operator-sdk/pkg/log/zap" "github.com/operator-framework/operator-sdk/pkg/metrics" "github.com/operator-framework/operator-sdk/pkg/restmapper" sdkVersion "github.com/operator-framework/operator-sdk/version" "github.com/spf13/pflag" v1 "k8s.io/api/core/v1" "k8s.io/apimachinery/pkg/util/intstr" "sigs.k8s.io/controller-runtime/pkg/client/config" "sigs.k8s.io/controller-runtime/pkg/manager" logf "sigs.k8s.io/controller-runtime/pkg/runtime/log" "sigs.k8s.io/controller-runtime/pkg/runtime/signals" ) // Change below variables to serve metrics on different host or port. var ( metricsHost = "0.0.0.0" metricsPort int32 = 8383 operatorMetricsPort int32 = 8686 ) var log = logf.Log.WithName("cmd") func printVersion() { log.Info(fmt.Sprintf("Go Version: %s", runtime.Version())) log.Info(fmt.Sprintf("Go OS/Arch: %s/%s", runtime.GOOS, runtime.GOARCH)) log.Info(fmt.Sprintf("Version of operator-sdk: %v", sdkVersion.Version)) } func main() { // Add the zap logger flag set to the CLI. The flag set must // be added before calling pflag.Parse(). pflag.CommandLine.AddFlagSet(zap.FlagSet()) // Add flags registered by imported packages (e.g. glog and // controller-runtime) pflag.CommandLine.AddGoFlagSet(flag.CommandLine) pflag.Parse() // Use a zap logr.Logger implementation. If none of the zap // flags are configured (or if the zap flag set is not being // used), this defaults to a production zap logger. // // The logger instantiated here can be changed to any logger // implementing the logr.Logger interface. This logger will // be propagated through the whole operator, generating // uniform and structured logs. logf.SetLogger(zap.Logger()) printVersion() namespace, err := k8sutil.GetWatchNamespace() if err != nil { log.Error(err, "Failed to get watch namespace") os.Exit(1) } // Get a config to talk to the apiserver cfg, err := config.GetConfig() if err != nil { log.Error(err, "") os.Exit(1) } ctx := context.TODO() // Become the leader before proceeding err = leader.Become(ctx, "collectd-operator-lock") if err != nil { log.Error(err, "") os.Exit(1) } // Create a new Cmd to provide shared dependencies and start components mgr, err := manager.New(cfg, manager.Options{ Namespace: namespace, MapperProvider: restmapper.NewDynamicRESTMapper, MetricsBindAddress: fmt.Sprintf("%s:%d", metricsHost, metricsPort), }) if err != nil { log.Error(err, "") os.Exit(1) } log.Info("Registering Components.") // Setup Scheme for all resources if err := apis.AddToScheme(mgr.GetScheme()); err != nil { log.Error(err, "") os.Exit(1) } // Setup all Controllers if err := controller.AddToManager(mgr); err != nil { log.Error(err, "") os.Exit(1) } if err = serveCRMetrics(cfg); err != nil { log.Info("Could not generate and serve custom resource metrics", "error", err.Error()) } // Add to the below struct any other metrics ports you want to expose. servicePorts := []v1.ServicePort{ {Port: metricsPort, Name: metrics.OperatorPortName, Protocol: v1.ProtocolTCP, TargetPort: intstr.IntOrString{Type: intstr.Int, IntVal: metricsPort}}, {Port: operatorMetricsPort, Name: metrics.CRPortName, Protocol: v1.ProtocolTCP, TargetPort: intstr.IntOrString{Type: intstr.Int, IntVal: operatorMetricsPort}}, } // Create Service object to expose the metrics port(s). _, err = metrics.CreateMetricsService(ctx, cfg, servicePorts) if err != nil { log.Info(err.Error()) } log.Info("Starting the Cmd.") // Start the Cmd if err := mgr.Start(signals.SetupSignalHandler()); err != nil { log.Error(err, "Manager exited non-zero") os.Exit(1) } } // serveCRMetrics gets the Operator/CustomResource GVKs and generates metrics based on those types. // It serves those metrics on "http://metricsHost:operatorMetricsPort". func serveCRMetrics(cfg *rest.Config) error { // Below function returns filtered operator/CustomResource specific GVKs. // For more control override the below GVK list with your own custom logic. filteredGVK, err := k8sutil.GetGVKsFromAddToScheme(apis.AddToScheme) if err != nil { return err } // Get the namespace the operator is currently deployed in. operatorNs, err := k8sutil.GetOperatorNamespace() if err != nil { return err } // To generate metrics in other namespaces, add the values below. ns := []string{operatorNs} // Generate and serve custom resource specific metrics. err = kubemetrics.GenerateAndServeCRMetrics(cfg, ns, filteredGVK, metricsHost, operatorMetricsPort) if err != nil { return err } return nil }