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main.go
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main.go
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package main
import (
"os"
"github.com/openshift/cluster-dns-operator/pkg/operator"
operatorconfig "github.com/openshift/cluster-dns-operator/pkg/operator/config"
statuscontroller "github.com/openshift/cluster-dns-operator/pkg/operator/controller/status"
"github.com/go-logr/logr"
"github.com/sirupsen/logrus"
"sigs.k8s.io/controller-runtime/pkg/client/config"
ctrlruntimelog "sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/manager/signals"
metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
)
const operatorNamespace = "openshift-dns-operator"
func main() {
metricsserver.DefaultBindAddress = "127.0.0.1:60000"
// This is required because controller-runtime expects its consumers to
// set a logger through log.SetLogger within 30 seconds of the program's
// initalization. We have our own logger and can configure controller-runtime's
// logger to do nothing.
ctrlruntimelog.SetLogger(logr.New(ctrlruntimelog.NullLogSink{}))
// Collect operator configuration.
releaseVersion := os.Getenv("RELEASE_VERSION")
if len(releaseVersion) == 0 {
releaseVersion = statuscontroller.UnknownVersionValue
logrus.Infof("RELEASE_VERSION environment variable is missing, defaulting to %q", statuscontroller.UnknownVersionValue)
}
coreDNSImage := os.Getenv("IMAGE")
if len(coreDNSImage) == 0 {
logrus.Fatalf("IMAGE environment variable is required")
}
cliImage := os.Getenv("OPENSHIFT_CLI_IMAGE")
if len(cliImage) == 0 {
logrus.Fatalf("OPENSHIFT_CLI_IMAGE environment variable is required")
}
kubeRBACProxyImage := os.Getenv("KUBE_RBAC_PROXY_IMAGE")
if len(kubeRBACProxyImage) == 0 {
logrus.Fatalf("KUBE_RBAC_PROXY_IMAGE environment variable is required")
}
operatorConfig := operatorconfig.Config{
OperatorNamespace: operatorNamespace,
OperatorReleaseVersion: releaseVersion,
CoreDNSImage: coreDNSImage,
OpenshiftCLIImage: cliImage,
KubeRBACProxyImage: kubeRBACProxyImage,
}
kubeConfig, err := config.GetConfig()
if err != nil {
logrus.Fatalf("failed to get kube config %v", err)
}
ctx := signals.SetupSignalHandler()
// Set up and start the operator.
op, err := operator.New(ctx, operatorConfig, kubeConfig)
if err != nil {
logrus.Fatalf("failed to create operator: %v", err)
}
if err := op.Start(ctx); err != nil {
logrus.Fatalf("failed to start operator: %v", err)
}
}