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main.go
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main.go
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package main
import (
"flag"
"fmt"
"k8s.io/client-go/tools/record"
"os"
"strconv"
"strings"
// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
asdbv1beta1 "github.com/aerospike/aerospike-kubernetes-operator/api/v1beta1"
aerospikecluster "github.com/aerospike/aerospike-kubernetes-operator/controllers"
"github.com/aerospike/aerospike-kubernetes-operator/pkg/configschema"
"github.com/aerospike/aerospike-management-lib/asconfig"
v1 "k8s.io/api/core/v1"
k8Runtime "k8s.io/apimachinery/pkg/runtime"
utilRuntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/client-go/kubernetes"
clientGoScheme "k8s.io/client-go/kubernetes/scheme"
v1core "k8s.io/client-go/kubernetes/typed/core/v1"
_ "k8s.io/client-go/plugin/pkg/client/auth"
"k8s.io/client-go/rest"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/cache"
crClient "sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/healthz"
"sigs.k8s.io/controller-runtime/pkg/log/zap"
"sigs.k8s.io/controller-runtime/pkg/webhook"
// +kubebuilder:scaffold:imports
)
var (
scheme = k8Runtime.NewScheme()
setupLog = ctrl.Log.WithName("setup")
)
func init() {
utilRuntime.Must(clientGoScheme.AddToScheme(scheme))
utilRuntime.Must(asdbv1beta1.AddToScheme(scheme))
// +kubebuilder:scaffold:scheme
}
func main() {
var metricsAddr string
var enableLeaderElection bool
var probeAddr string
flag.StringVar(
&metricsAddr, "metrics-bind-address", ":8080",
"The address the metric endpoint binds to.",
)
flag.StringVar(
&probeAddr, "health-probe-bind-address", ":8081",
"The address the probe endpoint binds to.",
)
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)))
watchNs, err := getWatchNamespace()
if err != nil {
setupLog.Error(err, "Failed to get watch namespace")
os.Exit(1)
}
var webhookServer *webhook.Server
legacyOlmCertDir := "/apiserver.local.config/certificates"
// If legacy directory is present then OLM < 0.17 is used and webhook server should be configured as follows
if info, err := os.Stat(legacyOlmCertDir); err == nil && info.IsDir() {
setupLog.Info(
"legacy OLM < 0.17 directory is present - initializing webhook" +
" server ",
)
webhookServer = &webhook.Server{
CertDir: "/apiserver.local.config/certificates",
CertName: "apiserver.crt",
KeyName: "apiserver.key",
}
}
// Create a new Cmd to provide shared dependencies and start components
options := ctrl.Options{
NewClient: newClient,
Scheme: scheme,
MetricsBindAddress: metricsAddr,
HealthProbeBindAddress: probeAddr,
LeaderElection: enableLeaderElection,
LeaderElectionID: "96242fdf.aerospike.com",
// if webhookServer is nil, which will be the case of OLM >= 0.17, the manager will create a server for you using Host, Port,
// and the default CertDir, KeyName, and CertName.
WebhookServer: webhookServer,
}
// Add support for multiple namespaces given in WATCH_NAMESPACE (e.g. ns1,ns2)
// For more Info: https://godoc.org/github.com/kubernetes-sigs/controller-runtime/pkg/cache#MultiNamespacedCacheBuilder
if strings.Contains(watchNs, ",") {
nsList := strings.Split(watchNs, ",")
var newNsList []string
for _, ns := range nsList {
newNsList = append(newNsList, strings.TrimSpace(ns))
}
options.NewCache = cache.MultiNamespacedCacheBuilder(newNsList)
} else {
options.Namespace = watchNs
}
mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), options)
if err != nil {
setupLog.Error(err, "unable to start manager")
os.Exit(1)
}
kubeConfig := ctrl.GetConfigOrDie()
kubeClient := kubernetes.NewForConfigOrDie(kubeConfig)
setupLog.Info("Init aerospike-server config schemas")
schemaMap, err := configschema.NewSchemaMap()
if err != nil {
setupLog.Error(err, "Unable to Load SchemaMap")
os.Exit(1)
}
schemaMapLogger := ctrl.Log.WithName("schema-map")
asconfig.InitFromMap(schemaMapLogger, schemaMap)
eventBroadcaster := record.NewBroadcasterWithCorrelatorOptions(record.CorrelatorOptions{
BurstSize: getEventBurstSize(),
QPS: 1,
})
// Start events processing pipeline.
eventBroadcaster.StartStructuredLogging(0)
eventBroadcaster.StartRecordingToSink(&v1core.EventSinkImpl{Interface: kubeClient.CoreV1().Events("")})
defer eventBroadcaster.Shutdown()
if err := (&aerospikecluster.AerospikeClusterReconciler{
Client: mgr.GetClient(),
KubeClient: kubeClient,
KubeConfig: kubeConfig,
Log: ctrl.Log.WithName("controllers").WithName("AerospikeCluster"),
Scheme: mgr.GetScheme(),
Recorder: eventBroadcaster.NewRecorder(mgr.GetScheme(), v1.EventSource{Component: "aerospikeCluster-controller"}),
}).SetupWithManager(mgr); err != nil {
setupLog.Error(
err, "unable to create controller", "controller",
"AerospikeCluster",
)
os.Exit(1)
}
if err = (&asdbv1beta1.AerospikeCluster{}).SetupWebhookWithManager(mgr); err != nil {
setupLog.Error(
err, "unable to create webhook", "webhook", "AerospikeCluster",
)
os.Exit(1)
}
// +kubebuilder:scaffold:builder
if err := mgr.AddHealthzCheck("health", healthz.Ping); err != nil {
setupLog.Error(err, "unable to set up health check")
os.Exit(1)
}
if err := mgr.AddReadyzCheck("check", healthz.Ping); err != nil {
setupLog.Error(err, "unable to set up ready check")
os.Exit(1)
}
setupLog.Info("Starting manager")
if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
setupLog.Error(err, "problem running manager")
os.Exit(1)
}
}
// getWatchNamespace returns the Namespace the operator should be watching for changes
func getWatchNamespace() (string, error) {
// WatchNamespaceEnvVar is the constant for env variable WATCH_NAMESPACE
// which specifies the Namespace to watch.
// An empty value means the operator is running with cluster scope.
var watchNamespaceEnvVar = "WATCH_NAMESPACE"
ns, found := os.LookupEnv(watchNamespaceEnvVar)
if !found {
return "", fmt.Errorf("%s must be set", watchNamespaceEnvVar)
}
return ns, nil
}
// getEventBurstSize returns the burst size of events that can be handled in the cluster
func getEventBurstSize() int {
// EventBurstSizeEnvVar is the constant for env variable EVENT_BURST_SIZE
// An empty value means the default burst size which is 150.
var eventBurstSizeEnvVar = "EVENT_BURST_SIZE"
var eventBurstSize = 150
burstSize, found := os.LookupEnv(eventBurstSizeEnvVar)
if found {
eventBurstSizeInt, err := strconv.Atoi(burstSize)
if err != nil {
setupLog.Info("Invalid EVENT_BURST_SIZE value: using default 150")
} else {
eventBurstSize = eventBurstSizeInt
}
}
return eventBurstSize
}
// newClient creates the default caching client
// this will read/write directly from api-server
func newClient(
_ cache.Cache, config *rest.Config, options crClient.Options,
_ ...crClient.Object,
) (crClient.Client, error) {
return crClient.New(config, options)
}