Esempio n. 1
0
// cases to test:
// child server, stopped normally; reattach, start
// non-direct child server, killed abnormally; reattach, start (->error), remove pid.txt; start
// non-direct child server, still running; reattach, start (->error), stop, start
// child server, still running; reattach, start (-> error)
// child server, still running; reattach, stop, start.
// non-direct child server, still running; reattach, stop, start.
func (s *S) TestAttachServer(c *C) {
	// Create a cookie so that we know we are reattaching to the same instance.
	conn, _ := s.init(c)
	_, err := conn.Create("/testAttachCookie", "testAttachCookie", 0, zk.WorldACL(zk.PERM_ALL))
	c.Assert(err, IsNil)
	s.checkCookie(c)
	s.zkServer.Stop()
	s.zkServer = nil

	s.testAttachServer(c, (*S).startServer)
	s.testAttachServer(c, (*S).startServerIndirect)
	s.testAttachServerAbnormalTerminate(c, (*S).startServer)
	s.testAttachServerAbnormalTerminate(c, (*S).startServerIndirect)

	srv, err := zk.AttachServer(s.zkTestRoot)
	c.Assert(err, IsNil)

	s.zkServer = srv
	err = s.zkServer.Start()
	c.Assert(err, IsNil)

	conn, _ = s.init(c)
	err = conn.Delete("/testAttachCookie", -1)
	c.Assert(err, IsNil)
}
Esempio n. 2
0
func (s *S) testAttachServerAbnormalTerminate(c *C, start func(*S, *C, bool)) {
	start(s, c, true)

	// try attaching to it and starting - it should fail, because pid.txt
	// won't have been removed.
	srv, err := zk.AttachServer(s.zkTestRoot)
	c.Assert(err, IsNil)
	err = srv.Start()
	c.Assert(err, NotNil)

	// stopping it should bring things back to normal.
	err = srv.Stop()
	c.Assert(err, IsNil)
	err = srv.Start()
	c.Assert(err, IsNil)

	s.checkCookie(c)
	err = srv.Stop()
	c.Assert(err, IsNil)
}
Esempio n. 3
0
// startServer starts a ZooKeeper server, and terminates it abnormally
// if abort is true.
func startServer(runDir string, abort bool) error {
	srv, err := zk.AttachServer(runDir)
	if err != nil {
		return fmt.Errorf("cannot attach to server at %q: %v", runDir, err)
	}
	if err := srv.Start(); err != nil {
		return fmt.Errorf("cannot start server: %v", err)
	}
	if abort {
		// Give it time to start up, then kill the server process abnormally,
		// leaving the pid.txt file behind.
		time.Sleep(0.5e9)
		p, err := srv.Process()
		if err != nil {
			return fmt.Errorf("cannot get server process: %v", err)
		}
		defer p.Release()
		if err := p.Kill(); err != nil {
			return fmt.Errorf("cannot kill server process: %v", err)
		}
	}
	return nil
}
Esempio n. 4
0
func (s *S) testAttachServer(c *C, start func(*S, *C, bool)) {
	start(s, c, false)

	s.checkCookie(c)

	// try attaching to it while it is still running - it should fail.
	srv, err := zk.AttachServer(s.zkTestRoot)
	c.Assert(err, IsNil)

	err = srv.Start()
	c.Assert(err, NotNil)

	// stop it and then start it again - it should succeed.
	err = srv.Stop()
	c.Assert(err, IsNil)

	err = srv.Start()
	c.Assert(err, IsNil)

	s.checkCookie(c)

	err = srv.Stop()
	c.Assert(err, IsNil)
}