wings/server/crash.go

75 lines
2.8 KiB
Go
Raw Normal View History

package server
import (
2019-12-01 01:08:11 +00:00
"fmt"
"github.com/pkg/errors"
"github.com/pterodactyl/wings/config"
"go.uber.org/zap"
"time"
)
type CrashDetection struct {
// If set to false, the system will not listen for crash detection events that
// can indicate that the server stopped unexpectedly.
Enabled bool `default:"true" json:"enabled" yaml:"enabled"`
// Tracks the time of the last server crash event.
lastCrash time.Time
}
// Looks at the environment exit state to determine if the process exited cleanly or
// if it was the result of an event that we should try to recover from.
//
// This function assumes it is called under circumstances where a crash is suspected
// of occuring. It will not do anything to determine if it was actually a crash, just
// look at the exit state and check if it meets the criteria of being called a crash
// by Wings.
//
// If the server is determined to have crashed, the process will be restarted and the
// counter for the server will be incremented.
//
// @todo output event to server console
func (s *Server) handleServerCrash() error {
// No point in doing anything here if the server isn't currently offline, there
// is no reason to do a crash detection event. If the server crash detection is
// disabled we want to skip anything after this as well.
if s.State != ProcessOfflineState || !s.CrashDetection.Enabled {
2019-12-01 01:08:11 +00:00
if !s.CrashDetection.Enabled {
zap.S().Debugw("server triggered crash detection but handler is disabled for server process", zap.String("server", s.Uuid))
2019-12-01 01:08:11 +00:00
s.SendConsoleOutputFromDaemon("Server detected as crashed; crash detection is disabled for this instance.")
}
return nil
}
exitCode, oomKilled, err := s.Environment.ExitState()
if err != nil {
return errors.WithStack(err)
}
// If the system is not configured to detect a clean exit code as a crash, and the
// crash is not the result of the program running out of memory, do nothing.
if exitCode == 0 && !oomKilled && !config.Get().System.DetectCleanExitAsCrash {
zap.S().Debugw("server exited with successful code; system configured to not detect as crash", zap.String("server", s.Uuid))
return nil
}
2019-12-01 01:08:11 +00:00
s.SendConsoleOutputFromDaemon("---------- Detected server process in a crashed state! ----------")
s.SendConsoleOutputFromDaemon(fmt.Sprintf("Exit code: %d", exitCode))
s.SendConsoleOutputFromDaemon(fmt.Sprintf("Out of memory: %t", oomKilled))
c := s.CrashDetection.lastCrash
// If the last crash time was within the last 60 seconds we do not want to perform
// an automatic reboot of the process. Return an error that can be handled.
if !c.IsZero() && c.Add(time.Second * 60).After(time.Now()) {
2019-12-01 01:08:11 +00:00
s.SendConsoleOutputFromDaemon("Aborting automatic reboot: last crash occurred less than 60 seconds ago.")
return &crashTooFrequent{}
}
s.CrashDetection.lastCrash = time.Now()
return s.Environment.Start()
}