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main.go
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main.go
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/*
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"
"fmt"
"os"
"time"
"github.com/metal-stack/metal-lib/pkg/sign"
"github.com/metal-stack/v"
apiextensions "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
"k8s.io/apimachinery/pkg/runtime"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/log/zap"
firewallv1 "github.com/metal-stack/firewall-controller/api/v1"
"github.com/metal-stack/firewall-controller/controllers"
"github.com/metal-stack/firewall-controller/controllers/crd"
// +kubebuilder:scaffold:imports
)
var (
scheme = runtime.NewScheme()
setupLog = ctrl.Log.WithName("setup")
)
func init() {
_ = clientgoscheme.AddToScheme(scheme)
_ = firewallv1.AddToScheme(scheme)
_ = apiextensions.AddToScheme(scheme)
// +kubebuilder:scaffold:scheme
}
func main() {
var (
isVersion bool
metricsAddr string
enableLeaderElection bool
enableIDS bool
enableSignatureCheck bool
hostsFile string
)
flag.BoolVar(&isVersion, "v", false, "Show firewall-controller version")
flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
flag.BoolVar(&enableLeaderElection, "enable-leader-election", false,
"Enable leader election for controller manager. "+
"Enabling this will ensure there is only one active controller manager.")
flag.BoolVar(&enableIDS, "enable-IDS", true, "Set this to false to exclude IDS.")
flag.StringVar(&hostsFile, "hosts-file", "/etc/hosts", "The hosts file to manipulate for the droptailer.")
flag.BoolVar(&enableSignatureCheck, "enable-signature-check", true, "Set this to false to ignore signature checking.")
flag.Parse()
if isVersion {
fmt.Println(v.V.String())
return
}
ctrl.SetLogger(zap.New(zap.UseDevMode(true)))
restConfig := ctrl.GetConfigOrDie()
mgr, err := ctrl.NewManager(restConfig, ctrl.Options{
Scheme: scheme,
MetricsBindAddress: metricsAddr,
Port: 9443,
LeaderElection: enableLeaderElection,
LeaderElectionID: "25f95f9f.metal-stack.io",
})
if err != nil {
setupLog.Error(err, "unable to start firewall-controller manager")
os.Exit(1)
}
ctx := ctrl.SetupSignalHandler()
// FIXME better at the end and not in a go func
go func() {
setupLog.Info("starting firewall-controller", "version", v.V)
if err := mgr.Start(ctx); err != nil {
setupLog.Error(err, "problem running firewall-controller")
panic(err)
}
}()
if started := mgr.GetCache().WaitForCacheSync(ctx); !started {
panic("not all started")
}
err = crd.WaitForCRDs(restConfig, crd.InstallOptions{
MaxTime: 500 * time.Millisecond,
PollInterval: 100 * time.Millisecond,
}, "firewall", "clusterwidenetworkpolicy")
if err != nil {
setupLog.Error(err, "unable to wait for created crds of firewall-controller")
os.Exit(1)
}
// Droptailer Reconciler
if err = (&controllers.DroptailerReconciler{
Client: mgr.GetClient(),
Log: ctrl.Log.WithName("controllers").WithName("Droptailer"),
Scheme: mgr.GetScheme(),
HostsFile: hostsFile,
}).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "unable to create controller", "controller", "Droptailer")
os.Exit(1)
}
// ClusterwideNetworkPolicy Reconciler
if err = controllers.NewClusterwideNetworkPolicyReconciler(mgr).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "unable to create controller", "controller", "ClusterwideNetworkPolicy")
os.Exit(1)
}
if err = (&controllers.ClusterwideNetworkPolicyValidationReconciler{
Client: mgr.GetClient(),
Log: ctrl.Log.WithName("controllers").WithName("ClusterwideNetworkPolicyValidation"),
Scheme: mgr.GetScheme(),
}).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "unable to create controller", "controller", "ClusterwideNetworkPolicyValidation")
os.Exit(1)
}
// Firewall Reconciler
caData := mgr.GetConfig().CAData
caCert, err := sign.DecodeCertificate(caData)
if err != nil {
setupLog.Error(err, "unable to decode ca certificate")
os.Exit(1)
}
caPubKey, err := sign.ExtractPubKey(caCert)
if err != nil {
setupLog.Error(err, "unable to extract rsa pub key from ca certificate")
os.Exit(1)
}
if err = (&controllers.FirewallReconciler{
Client: mgr.GetClient(),
Log: ctrl.Log.WithName("controllers").WithName("Firewall"),
Scheme: mgr.GetScheme(),
EnableIDS: enableIDS,
EnableSignatureCheck: enableSignatureCheck,
CAPubKey: caPubKey,
}).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "unable to create controller", "controller", "Firewall")
os.Exit(1)
}
// +kubebuilder:scaffold:builder
<-ctx.Done()
}