-
Notifications
You must be signed in to change notification settings - Fork 1.9k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #4153 from ninoles/b-2117-windows-group-process
B 2117 windows group process
- Loading branch information
Showing
4 changed files
with
148 additions
and
40 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,111 @@ | ||
// +build windows | ||
|
||
package executor | ||
|
||
import ( | ||
"fmt" | ||
"io" | ||
"os" | ||
"syscall" | ||
|
||
syslog "github.com/RackSec/srslog" | ||
|
||
"github.com/hashicorp/nomad/client/driver/logging" | ||
) | ||
|
||
func (e *UniversalExecutor) LaunchSyslogServer() (*SyslogServerState, error) { | ||
// Ensure the context has been set first | ||
if e.ctx == nil { | ||
return nil, fmt.Errorf("SetContext must be called before launching the Syslog Server") | ||
} | ||
|
||
e.syslogChan = make(chan *logging.SyslogMessage, 2048) | ||
l, err := e.getListener(e.ctx.PortLowerBound, e.ctx.PortUpperBound) | ||
if err != nil { | ||
return nil, err | ||
} | ||
e.logger.Printf("[DEBUG] syslog-server: launching syslog server on addr: %v", l.Addr().String()) | ||
if err := e.configureLoggers(); err != nil { | ||
return nil, err | ||
} | ||
|
||
e.syslogServer = logging.NewSyslogServer(l, e.syslogChan, e.logger) | ||
go e.syslogServer.Start() | ||
go e.collectLogs(e.lre, e.lro) | ||
syslogAddr := fmt.Sprintf("%s://%s", l.Addr().Network(), l.Addr().String()) | ||
return &SyslogServerState{Addr: syslogAddr}, nil | ||
} | ||
|
||
func (e *UniversalExecutor) collectLogs(we io.Writer, wo io.Writer) { | ||
for logParts := range e.syslogChan { | ||
// If the severity of the log line is err then we write to stderr | ||
// otherwise all messages go to stdout | ||
if logParts.Severity == syslog.LOG_ERR { | ||
e.lre.Write(logParts.Message) | ||
e.lre.Write([]byte{'\n'}) | ||
} else { | ||
e.lro.Write(logParts.Message) | ||
e.lro.Write([]byte{'\n'}) | ||
} | ||
} | ||
} | ||
|
||
// configure new process group for child process | ||
func (e *UniversalExecutor) setNewProcessGroup() error { | ||
// We need to check that as build flags includes windows for this file | ||
if e.cmd.SysProcAttr == nil { | ||
e.cmd.SysProcAttr = &syscall.SysProcAttr{} | ||
} | ||
e.cmd.SysProcAttr.CreationFlags = syscall.CREATE_NEW_PROCESS_GROUP | ||
return nil | ||
} | ||
|
||
// Cleanup any still hanging user processes | ||
func (e *UniversalExecutor) cleanupChildProcesses(proc *os.Process) error { | ||
// We must first verify if the process is still running. | ||
// (Windows process often lingered around after being reported as killed). | ||
handle, err := syscall.OpenProcess(syscall.PROCESS_TERMINATE|syscall.SYNCHRONIZE|syscall.PROCESS_QUERY_INFORMATION, false, uint32(proc.Pid)) | ||
if err != nil { | ||
return os.NewSyscallError("OpenProcess", err) | ||
} | ||
defer syscall.CloseHandle(handle) | ||
|
||
result, err := syscall.WaitForSingleObject(syscall.Handle(handle), 0) | ||
|
||
switch result { | ||
case syscall.WAIT_OBJECT_0: | ||
return nil | ||
case syscall.WAIT_TIMEOUT: | ||
// Process still running. Just kill it. | ||
return proc.Kill() | ||
default: | ||
return os.NewSyscallError("WaitForSingleObject", err) | ||
} | ||
} | ||
|
||
// Send a Ctrl-Break signal for shutting down the process, | ||
// like in https://golang.org/src/os/signal/signal_windows_test.go | ||
func sendCtrlBreak(pid int) error { | ||
dll, err := syscall.LoadDLL("kernel32.dll") | ||
if err != nil { | ||
return fmt.Errorf("Error loading kernel32.dll: %v", err) | ||
} | ||
proc, err := dll.FindProc("GenerateConsoleCtrlEvent") | ||
if err != nil { | ||
return fmt.Errorf("Cannot find procedure GenerateConsoleCtrlEvent: %v", err) | ||
} | ||
result, _, err := proc.Call(syscall.CTRL_BREAK_EVENT, uintptr(pid)) | ||
if result == 0 { | ||
return fmt.Errorf("Error sending ctrl-break event: %v", err) | ||
} | ||
return nil | ||
} | ||
|
||
func (e *UniversalExecutor) shutdownProcess(proc *os.Process) error { | ||
if err := sendCtrlBreak(proc.Pid); err != nil { | ||
return fmt.Errorf("executor.shutdown error: %v", err) | ||
} | ||
e.logger.Printf("Sent Ctrl-Break to process %v", proc.Pid) | ||
|
||
return nil | ||
} |