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Implement log rotation

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Closes #132.
This commit is contained in:
fox.cpp 2019-09-19 19:36:53 +03:00
parent feb1507c75
commit 2e9a0ea818
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GPG key ID: E76D97CCEDE90B6C
2 changed files with 44 additions and 5 deletions
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32
config.go
View file

@ -4,6 +4,7 @@ import (
"errors"
"fmt"
"os"
"path/filepath"
"github.com/foxcpp/maddy/config"
"github.com/foxcpp/maddy/log"
@ -34,7 +35,7 @@ func logOutput(m *config.Map, node *config.Node) (interface{}, error) {
func LogOutputOption(args []string) (log.Output, error) {
outs := make([]log.Output, 0, len(args))
for _, arg := range args {
for i, arg := range args {
switch arg {
case "stderr":
outs = append(outs, log.WriterOutput(os.Stderr, false))
@ -52,7 +53,18 @@ func LogOutputOption(args []string) (log.Output, error) {
}
return nil, nil
default:
w, err := os.OpenFile(arg, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0666)
// Log file paths are converted to absolute to make sure
// we will be able to recreate them in right location
// after changing working directory to the state dir.
absPath, err := filepath.Abs(arg)
if err != nil {
return nil, err
}
// We change the actual argument, so logOut object will
// keep the absolute path for reinitialization.
args[i] = absPath
w, err := os.OpenFile(absPath, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0666)
if err != nil {
return nil, fmt.Errorf("failed to create log file: %v", err)
}
@ -70,3 +82,19 @@ func LogOutputOption(args []string) (log.Output, error) {
func defaultLogOutput() (interface{}, error) {
return log.DefaultLogger.Out, nil
}
func reinitLogging() {
out, ok := log.DefaultLogger.Out.(logOut)
if !ok {
log.Println("Can't reinitialize logger because it was replaced before, this is a bug")
return
}
newOut, err := LogOutputOption(out.args)
if err != nil {
log.Println("Can't reinitialize logger:", err)
return
}
log.DefaultLogger.Out = newOut
}

15
maddy.go
View file

@ -100,10 +100,21 @@ func Start(cfg []config.Node) error {
}
sig := make(chan os.Signal, 5)
signal.Notify(sig, os.Interrupt, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGINT)
signal.Notify(sig, os.Interrupt, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGINT, syscall.SIGUSR1)
s := <-sig
for {
switch s := <-sig; s {
case syscall.SIGUSR1:
log.Println("SIGUSR1 received, reinitializing logging")
reinitLogging()
default:
log.Printf("signal received (%v), next signal will force immediate shutdown.", s)
// break inside switch exits switch, not outer loop
goto exitsigloop
}
}
exitsigloop:
go func() {
s := <-sig
log.Printf("forced shutdown due to signal (%v)!", s)