/
main.go
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/
main.go
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// Copyright 2022 Undistro Authors
//
// 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 (
"crypto/tls"
"flag"
"fmt"
"net/http"
"os"
"strings"
"time"
"github.com/undistro/zora/pkg/crds"
apiextensionsv1client "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset/typed/apiextensions/v1"
// 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"
ctrllog "sigs.k8s.io/controller-runtime/pkg/log"
"go.uber.org/zap/zapcore"
"k8s.io/apimachinery/pkg/runtime"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/client-go/kubernetes"
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"
metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
zorav1alpha1 "github.com/undistro/zora/api/zora/v1alpha1"
zorav1alpha2 "github.com/undistro/zora/api/zora/v1alpha2"
zoracontroller "github.com/undistro/zora/internal/controller/zora"
"github.com/undistro/zora/internal/saas"
//+kubebuilder:scaffold:imports
)
var (
scheme = runtime.NewScheme()
setupLog = ctrl.Log.WithName("setup")
)
func init() {
utilruntime.Must(clientgoscheme.AddToScheme(scheme))
utilruntime.Must(zorav1alpha1.AddToScheme(scheme))
utilruntime.Must(zorav1alpha2.AddToScheme(scheme))
//+kubebuilder:scaffold:scheme
}
func main() {
var metricsAddr string
var enableLeaderElection bool
var probeAddr string
var secureMetrics bool
var enableHTTP2 bool
var defaultPluginsNamespace string
var defaultPluginsNames string
var workerImage string
var cronJobClusterRoleBinding string
var cronJobServiceAccount string
var cronJobAnnotations string
var saasWorkspaceID string
var saasServer string
var version string
var checksConfigMapNamespace string
var checksConfigMapName string
var kubexnsImage string
var trivyPVC string
var updateCRDs bool
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.")
flag.BoolVar(&secureMetrics, "metrics-secure", false,
"If set the metrics endpoint is served securely")
flag.BoolVar(&enableHTTP2, "enable-http2", false,
"If set, HTTP/2 will be enabled for the metrics and webhook servers")
flag.StringVar(&defaultPluginsNamespace, "default-plugins-namespace", "zora-system", "The namespace of default plugins")
flag.StringVar(&defaultPluginsNames, "default-plugins-names", "marvin,popeye", "Comma separated list of default plugins")
flag.StringVar(&workerImage, "worker-image", "ghcr.io/undistro/zora/worker:latest", "Docker image name of Worker container")
flag.StringVar(&cronJobClusterRoleBinding, "cronjob-clusterrolebinding-name", "zora-plugins-rolebinding", "Name of ClusterRoleBinding to append CronJob ServiceAccounts")
flag.StringVar(&cronJobServiceAccount, "cronjob-serviceaccount-name", "zora-plugins", "Name of ServiceAccount to be configured, appended to ClusterRoleBinding and used by CronJobs")
flag.StringVar(&cronJobAnnotations, "cronjob-serviceaccount-annotations", "annotaion1=value1,annotation2=value2", "Annotations to be applied to the CronJob Service Account")
flag.StringVar(&saasWorkspaceID, "saas-workspace-id", "", "Your workspace ID in Zora SaaS")
flag.StringVar(&saasServer, "saas-server", "http://localhost:3003", "Address for Zora's saas server")
flag.StringVar(&version, "version", "0.8.4", "Zora version")
flag.StringVar(&checksConfigMapNamespace, "checks-configmap-namespace", "zora-system", "Namespace of custom checks ConfigMap")
flag.StringVar(&checksConfigMapName, "checks-configmap-name", "zora-custom-checks", "Name of custom checks ConfigMap")
flag.StringVar(&kubexnsImage, "kubexns-image", "ghcr.io/undistro/kubexns:latest", "kubexns image")
flag.StringVar(&trivyPVC, "trivy-db-pvc", "", "PersistentVolumeClaim name for Trivy DB")
flag.BoolVar(&updateCRDs, "update-crds", false,
"If set, operator will update Zora CRDs if needed")
opts := zap.Options{
Development: true,
TimeEncoder: zapcore.TimeEncoderOfLayout(time.RFC3339),
}
opts.BindFlags(flag.CommandLine)
flag.Parse()
ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
// if the enable-http2 flag is false (the default), http/2 should be disabled
// due to its vulnerabilities. More specifically, disabling http/2 will
// prevent from being vulnerable to the HTTP/2 Stream Cancellation and
// Rapid Reset CVEs. For more information see:
// - https://github.com/advisories/GHSA-qppj-fm5r-hxr3
// - https://github.com/advisories/GHSA-4374-p667-p6c8
disableHTTP2 := func(c *tls.Config) {
setupLog.Info("disabling http/2")
c.NextProtos = []string{"http/1.1"}
}
tlsOpts := []func(*tls.Config){}
if !enableHTTP2 {
tlsOpts = append(tlsOpts, disableHTTP2)
}
restConfig := ctrl.GetConfigOrDie()
mgr, err := ctrl.NewManager(restConfig, ctrl.Options{
Scheme: scheme,
Metrics: metricsserver.Options{
BindAddress: metricsAddr,
SecureServing: secureMetrics,
TLSOpts: tlsOpts,
},
HealthProbeBindAddress: probeAddr,
LeaderElection: enableLeaderElection,
LeaderElectionID: "e0f4eef4.zora.undistro.io",
})
if err != nil {
setupLog.Error(err, "unable to start manager")
os.Exit(1)
}
var onClusterUpdate, onClusterDelete saas.ClusterHook
var onClusterScanUpdate, onClusterScanDelete saas.ClusterScanHook
client := &http.Client{Transport: &http.Transport{Proxy: http.ProxyFromEnvironment}}
if saasWorkspaceID != "" {
saasClient, err := saas.NewClient(saasServer, version, saasWorkspaceID, client)
if err != nil {
setupLog.Error(err, "unable to create SaaS client", "workspaceID", saasWorkspaceID)
os.Exit(1)
}
setupLog.Info("registering SaaS hooks on reconcilers", "workspaceID", saasWorkspaceID)
onClusterUpdate = saas.UpdateClusterHook(saasClient)
onClusterDelete = saas.DeleteClusterHook(saasClient)
onClusterScanUpdate = saas.UpdateClusterScanHook(saasClient, mgr.GetClient())
onClusterScanDelete = saas.DeleteClusterScanHook(saasClient, mgr.GetClient())
}
if err = (&zoracontroller.ClusterReconciler{
Client: mgr.GetClient(),
Scheme: mgr.GetScheme(),
Recorder: mgr.GetEventRecorderFor("cluster-controller"),
Config: restConfig,
OnUpdate: onClusterUpdate,
OnDelete: onClusterDelete,
}).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "unable to create controller", "controller", "Cluster")
os.Exit(1)
}
annotations, err := annotations(cronJobAnnotations)
if err != nil {
setupLog.Error(err, "unable to parse annotations")
os.Exit(1)
}
if err = (&zoracontroller.ClusterScanReconciler{
Client: mgr.GetClient(),
K8sClient: kubernetes.NewForConfigOrDie(restConfig),
Scheme: mgr.GetScheme(),
Recorder: mgr.GetEventRecorderFor("clusterscan-controller"),
DefaultPluginsNamespace: defaultPluginsNamespace,
DefaultPluginsNames: strings.Split(defaultPluginsNames, ","),
WorkerImage: workerImage,
ClusterRoleBindingName: cronJobClusterRoleBinding,
ServiceAccountName: cronJobServiceAccount,
Annotations: annotations,
OnUpdate: onClusterScanUpdate,
OnDelete: onClusterScanDelete,
KubexnsImage: kubexnsImage,
TrivyPVC: trivyPVC,
ChecksConfigMap: fmt.Sprintf("%s/%s", checksConfigMapNamespace, checksConfigMapName),
}).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "unable to create controller", "controller", "ClusterScan")
os.Exit(1)
}
if err = (&zoracontroller.CustomCheckReconciler{
Client: mgr.GetClient(),
Scheme: mgr.GetScheme(),
ConfigMapNamespace: checksConfigMapNamespace,
ConfigMapName: checksConfigMapName,
}).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "unable to create controller", "controller", "CustomCheck")
os.Exit(1)
}
//+kubebuilder:scaffold:builder
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)
}
ctx := ctrl.SetupSignalHandler()
if updateCRDs {
if err := crds.Update(ctrllog.IntoContext(ctx, setupLog), apiextensionsv1client.NewForConfigOrDie(restConfig)); err != nil {
setupLog.Error(err, "unable to update CRDs")
os.Exit(1)
}
}
setupLog.Info("starting manager")
if err := mgr.Start(ctx); err != nil {
setupLog.Error(err, "problem running manager")
os.Exit(1)
}
}
func annotations(cronJobAnnotations string) (map[string]string, error) {
cronJobAnnotations = strings.Trim(cronJobAnnotations, " ")
if len(cronJobAnnotations) == 0 {
return nil, nil
}
annotations := map[string]string{}
for _, annotation := range strings.Split(cronJobAnnotations, ",") {
index := strings.Index(annotation, "=")
if index == -1 || index == len(annotation) {
return nil, fmt.Errorf("Could not parse annotation %s", annotation)
}
key := annotation[:index]
value := annotation[index+1:]
annotations[key] = value
}
return annotations, nil
}