93 lines
2.3 KiB
Go
93 lines
2.3 KiB
Go
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package main
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import (
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"os"
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"git.luzifer.io/luzifer/ipt-loadbalancer/pkg/config"
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"git.luzifer.io/luzifer/ipt-loadbalancer/pkg/iptables"
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"git.luzifer.io/luzifer/ipt-loadbalancer/pkg/servicemonitor"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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"github.com/Luzifer/rconfig/v2"
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)
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var (
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cfg = struct {
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Config string `flag:"config,c" default:"config.yaml" description:"Configuration file to load"`
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InsertIntoPrerouting bool `flag:"insert-into-prerouting,i" default:"false" description:"Modify PREROUTING chain to contain a jump to managed chain"`
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LogLevel string `flag:"log-level" default:"info" description:"Log level (debug, info, warn, error, fatal)"`
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VersionAndExit bool `flag:"version" default:"false" description:"Prints current version and exits"`
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}{}
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version = "dev"
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)
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func initApp() error {
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rconfig.AutoEnv(true)
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if err := rconfig.ParseAndValidate(&cfg); err != nil {
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return errors.Wrap(err, "parsing cli options")
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}
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l, err := logrus.ParseLevel(cfg.LogLevel)
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if err != nil {
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return errors.Wrap(err, "parsing log-level")
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}
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logrus.SetLevel(l)
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return nil
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}
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func main() {
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var err error
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if err = initApp(); err != nil {
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logrus.WithError(err).Fatal("initializing app")
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}
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if cfg.VersionAndExit {
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logrus.WithField("version", version).Info("ipt-loadbalancer")
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os.Exit(0)
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}
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confFile, err := config.Load(cfg.Config)
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if err != nil {
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logrus.WithError(err).Fatal("loading config file")
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}
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ipt, err := iptables.New(confFile.ManagedChain)
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if err != nil {
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logrus.WithError(err).Fatal("creating iptables client")
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}
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if err = ipt.EnsureManagedChains(); err != nil {
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logrus.WithError(err).Fatal("creating managed chain")
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}
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if cfg.InsertIntoPrerouting {
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if err = ipt.EnableMangedRoutingChains(); err != nil {
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logrus.WithError(err).Fatal("enabling routing")
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}
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}
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svcErr := make(chan error, 1)
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for i := range confFile.Services {
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s := confFile.Services[i]
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sMon := servicemonitor.New(ipt, logrus.WithField("service", s.Name), s)
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go func() { svcErr <- sMon.Run() }()
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}
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logrus.WithFields(logrus.Fields{
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"services": len(confFile.Services),
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"version": version,
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}).Info("ipt-loadbalancer started")
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for err := range svcErr {
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if err == nil {
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continue
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}
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logrus.WithError(err).Fatal("service monitor caused error")
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}
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}
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