/
command.go
161 lines (146 loc) · 5.24 KB
/
command.go
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// Copyright 2024 SAP SE
//
// 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 cmd
import (
goflag "flag"
"fmt"
"math/rand"
"os"
"strconv"
"time"
"github.com/spf13/cobra"
"github.com/spf13/viper"
corev1 "k8s.io/api/core/v1"
_ "k8s.io/client-go/plugin/pkg/client/auth/oidc"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client/config"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
conf "github.com/sapcc/go-pmtud/internal/config"
metr "github.com/sapcc/go-pmtud/internal/metrics"
"github.com/sapcc/go-pmtud/internal/nflog"
"github.com/sapcc/go-pmtud/internal/node"
"github.com/sapcc/go-pmtud/internal/util"
"sigs.k8s.io/controller-runtime/pkg/log/zap"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/manager/signals"
"sigs.k8s.io/controller-runtime/pkg/metrics"
"sigs.k8s.io/controller-runtime/pkg/source"
)
var rootCmd = &cobra.Command{
Use: "pmtud",
Short: "",
Long: "",
RunE: runRootCmd,
PreRunE: preRunRootCmd,
}
var cfg = conf.Config{}
func init() {
viper.AutomaticEnv()
viper.SetEnvPrefix("PMTUD")
rootCmd.PersistentFlags().StringSliceVar(&cfg.InterfaceNames, "iface_names", nil, "Replication interface names to work on")
rootCmd.PersistentFlags().StringVar(&cfg.NodeName, "nodename", "", "Node hostname")
rootCmd.PersistentFlags().IntVar(&cfg.InterfaceMtu, "iface_mtu", 1500, "MTU size that replication interface should have")
// rootCmd.PersistentFlags().StringSliceVar(&cfg.Peers, "peers", nil, "Resend ICMP frag-needed packets to this peer list (comma separated)")
rootCmd.PersistentFlags().IntVar(&cfg.MetricsPort, "metrics_port", 30040, "Port for Prometheus metrics")
rootCmd.PersistentFlags().IntVar(&cfg.HealthPort, "health_port", 30041, "Port for healthz")
rootCmd.PersistentFlags().Uint16Var(&cfg.NfGroup, "nflog_group", 33, "NFLOG group")
rootCmd.PersistentFlags().IntVar(&cfg.TimeToLive, "ttl", 1, "TTL for resent packets")
rootCmd.PersistentFlags().IntVar(&cfg.ArpCacheTimeoutMinutes, "node-timeout-minutes", 5, "Timeout in minutes for node arp entry")
rootCmd.PersistentFlags().IntVar(&cfg.ArpRequestTimeoutSeconds, "arp-timeout-seconds", 1, "Timeout in seconds for node arp request")
rootCmd.PersistentFlags().StringVar(&cfg.KubeContext, "kube_context", "", "kube-context to use")
rootCmd.PersistentFlags().AddGoFlagSet(goflag.CommandLine)
err := viper.BindPFlags(rootCmd.PersistentFlags())
if err != nil {
os.Exit(1)
}
rsource := rand.NewSource(time.Now().UnixNano())
rng := rand.New(rsource) //nolint:gosec // Ignoring G404: Use of weak random number generator (math/rand instead of crypto/rand)
cfg.RandDelay = rng.Intn(1000) + 1000
metrics.Registry.MustRegister(metr.SentError, metr.Error, metr.ArpResolveError, metr.SentPacketsPeer, metr.SentPackets, metr.RecvPackets, metr.CallbackDuration)
cfg.PeerList = make(map[string]conf.PeerEntry)
}
func preRunRootCmd(cmd *cobra.Command, args []string) error {
log := zap.New(func(o *zap.Options) {
o.Development = true
}).WithName("preRunRoot")
err := util.GetReplicationInterface(&cfg, log)
if err != nil {
return err
}
err = util.GetDefaultInterface(&cfg, log)
if err != nil {
return err
}
return nil
}
func runRootCmd(cmd *cobra.Command, args []string) error {
log := zap.New(func(o *zap.Options) {
o.Development = true
}).WithName("runRoot")
ctrl.SetLogger(log)
managerOpts := manager.Options{
MetricsBindAddress: ":" + strconv.Itoa(viper.GetInt("metrics_port")),
HealthProbeBindAddress: ":" + strconv.Itoa(cfg.HealthPort),
}
restConfig, err := config.GetConfigWithContext(cfg.KubeContext)
if err != nil {
log.Error(err, "error getting kube config. Exiting.")
os.Exit(1)
}
mgr, err := manager.New(restConfig, managerOpts)
if err != nil {
log.Error(err, "error creating manager. Exiting.")
os.Exit(1)
}
// add node-controller
c, err := controller.New("node-controller", mgr, controller.Options{
Reconciler: &node.Reconciler{
Log: mgr.GetLogger().WithName("node-controller"),
Client: mgr.GetClient(),
Cfg: &cfg,
},
})
if err != nil {
log.Error(err, "error creating node-controller")
return err
}
err = c.Watch(&source.Kind{Type: &corev1.Node{}}, &handler.EnqueueRequestForObject{})
if err != nil {
log.Error(err, "error watching nodes")
return err
}
// add nfLog controller
nfc := nflog.Controller{
Log: log.WithName("nfLog-controller"),
Cfg: &cfg,
}
err = mgr.Add(&nfc)
if err != nil {
log.Error(err, "error adding nfLog-controller")
return err
}
err = mgr.Start(signals.SetupSignalHandler())
if err != nil {
log.Error(err, "error starting manager")
return err
}
return nil
}
func Execute() {
if err := rootCmd.Execute(); err != nil {
_, _ = fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}