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run.go
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run.go
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// Copyright (C) 2020-2021, IrineSistiana
//
// This file is part of mosdns.
//
// mosdns is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// mosdns is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package coremain
import (
"errors"
"fmt"
"github.com/IrineSistiana/mosdns/dispatcher/handler"
"github.com/IrineSistiana/mosdns/dispatcher/mlog"
_ "github.com/IrineSistiana/mosdns/dispatcher/plugin"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
"os"
"os/signal"
"syscall"
)
// Run starts mosdns, it blocks.
func Run(c string) {
err := loadConfig(c, 0)
if err != nil {
mlog.L().Fatal("loading config", zap.Error(err))
}
mlog.L().Info("all plugins are successfully loaded")
//wait for signals
osSignals := make(chan os.Signal, 1)
signal.Notify(osSignals, os.Interrupt, os.Kill, syscall.SIGTERM)
s := <-osSignals
mlog.L().Info("exiting, bye", zap.Stringer("signal", s))
os.Exit(0)
}
const (
maxIncludeDepth = 10
)
// Init loads plugins from config
func loadConfig(f string, depth int) error {
if depth >= maxIncludeDepth {
return errors.New("max include depth reached")
}
depth++
mlog.L().Info("loading config", zap.String("file", f))
c, err := parseConfig(f)
if err != nil {
return fmt.Errorf("failed to parse config from file %s: %w", f, err)
}
if depth == 1 { // init logger
level, err := parseLogLevel(c.Log.Level)
if err != nil {
return err
}
mlog.Level().SetLevel(level)
if len(c.Log.File) != 0 {
mlog.L().Info("opening log file", zap.String("file", c.Log.File))
f, err := os.OpenFile(c.Log.File, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0755)
if err != nil {
return fmt.Errorf("can not open log file %s: %w", c.Log.File, err)
}
mlog.L().Info("redirecting log to file, end of console log", zap.String("file", c.Log.File))
mlog.Writer().Replace(f)
}
}
for i, pluginConfig := range c.Plugin {
if len(pluginConfig.Tag) == 0 {
continue
}
mlog.L().Info("loading plugin", zap.String("tag", pluginConfig.Tag))
if err := handler.InitAndRegPlugin(pluginConfig, true); err != nil {
return fmt.Errorf("failed to register plugin #%d %s: %w", i, pluginConfig.Tag, err)
}
}
for _, include := range c.Include {
if len(include) == 0 {
continue
}
err := loadConfig(include, depth)
if err != nil {
return err
}
}
return nil
}
func parseLogLevel(s string) (zapcore.Level, error) {
switch s {
case "debug":
return zap.DebugLevel, nil
case "", "info":
return zap.InfoLevel, nil
case "warn":
return zap.WarnLevel, nil
case "error":
return zap.ErrorLevel, nil
default:
return 0, fmt.Errorf("invalid log level [%s]", s)
}
}