Esempio n. 1
0
/* fork lifecheck process*/
static pid_t
fork_a_lifecheck(int fork_wait_time)
{
	pid_t pid;

	pid = fork();
	if (pid != 0)
	{
		if (pid == -1)
			pool_error("fork_a_lifecheck: fork() failed.");

		return pid;
	}

	if (fork_wait_time > 0) {
		sleep(fork_wait_time);
	}

	myargv = save_ps_display_args(myargc, myargv);

	POOL_SETMASK(&UnBlockSig);

	init_ps_display("", "", "", "");

	signal(SIGTERM, wd_exit);	
	signal(SIGINT, wd_exit);	
	signal(SIGQUIT, wd_exit);	
	signal(SIGCHLD, SIG_DFL);
	signal(SIGHUP, SIG_IGN);	
	signal(SIGPIPE, SIG_IGN);	

	set_ps_display("lifecheck",false);

	/* wait until ready to go */
	while (WD_OK != is_wd_lifecheck_ready())
	{
		sleep(pool_config->wd_interval * 10);
	}

	pool_log("watchdog: lifecheck started");

	/* watchdog loop */
	for (;;)
	{
		/* pgpool life check */
		wd_lifecheck();
		sleep(pool_config->wd_interval);
	}

	return pid;
}
Esempio n. 2
0
/* fork lifecheck process*/
static pid_t
fork_a_lifecheck(int fork_wait_time)
{
	pid_t pid;
	sigjmp_buf	local_sigjmp_buf;

	pid = fork();
	if (pid != 0)
	{
		if (pid == -1)
			ereport(ERROR,
					(errmsg("failed to fork a lifecheck process")));
		return pid;
	}
    on_exit_reset();
	processType = PT_LIFECHECK;

	if (fork_wait_time > 0) {
		sleep(fork_wait_time);
	}

	POOL_SETMASK(&UnBlockSig);

	init_ps_display("", "", "", "");

	signal(SIGTERM, wd_exit);	
	signal(SIGINT, wd_exit);	
	signal(SIGQUIT, wd_exit);	
	signal(SIGCHLD, SIG_DFL);
	signal(SIGHUP, SIG_IGN);	
	signal(SIGPIPE, SIG_IGN);

	/* Create per loop iteration memory context */
	ProcessLoopContext = AllocSetContextCreate(TopMemoryContext,
											   "wd_lifecheck_main_loop",
											   ALLOCSET_DEFAULT_MINSIZE,
											   ALLOCSET_DEFAULT_INITSIZE,
											   ALLOCSET_DEFAULT_MAXSIZE);
	
	MemoryContextSwitchTo(TopMemoryContext);

	set_ps_display("lifecheck",false);

	/* wait until ready to go */
	while (WD_OK != is_wd_lifecheck_ready())
	{
		sleep(pool_config->wd_interval * 10);
	}
	ereport(LOG,
			(errmsg("watchdog: lifecheck started")));

	if (sigsetjmp(local_sigjmp_buf, 1) != 0)
	{
		/* Since not using PG_TRY, must reset error stack by hand */
		error_context_stack = NULL;
		
		EmitErrorReport();
		MemoryContextSwitchTo(TopMemoryContext);
		FlushErrorState();
		sleep(pool_config->wd_heartbeat_keepalive);
	}
	
	/* We can now handle ereport(ERROR) */
	PG_exception_stack = &local_sigjmp_buf;

	/* watchdog loop */
	for (;;)
	{
		MemoryContextSwitchTo(ProcessLoopContext);
		MemoryContextResetAndDeleteChildren(ProcessLoopContext);

		/* pgpool life check */
		wd_lifecheck();
		sleep(pool_config->wd_interval);
	}

	return pid;
}