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gs_ctl启动gaussdb服务后分离postmaster进程

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This commit is contained in:
fairyfar
2022-03-23 23:11:17 +08:00
parent 3ac101d466
commit 42cf785d37
1 changed files with 48 additions and 1 deletions
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49
src/bin/pg_ctl/pg_ctl.cpp
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@ -248,12 +248,13 @@ char* ssl_rand_file = "server.key.rand";
char pgxc_node_name[MAXPGPATH];
static volatile pgpid_t postmasterPID = -1;
#if defined(WIN32) || defined(__CYGWIN__)
static DWORD pgctl_start_type = SERVICE_AUTO_START;
static SERVICE_STATUS status;
static SERVICE_STATUS_HANDLE hStatus = (SERVICE_STATUS_HANDLE)0;
static HANDLE shutdownHandles[2];
static pid_t postmasterPID = -1;
#define shutdownEvent shutdownHandles[0]
#define postmasterProcess shutdownHandles[1]
@ -809,6 +810,19 @@ static pgpid_t start_postmaster(void)
/* fork succeeded, in child */
/*
* If possible, detach the postmaster process from the launching process
* group and make it a group leader, so that it doesn't get signaled along
* with the current group that launched it.
*/
#ifdef HAVE_SETSID
if (setsid() < 0) {
pg_log(PG_WARNING, _("%s: could not start server due to setsid() failure: %s\n"),
progname, strerror(errno));
exit(1);
}
#endif
if (pg_host != NULL && *(pg_host) != '\0') {
ret = snprintf_s(template_file, MAXPGPATH, MAXPGPATH - 1, "%s/binary_upgrade/old_upgrade_version", pg_host);
securec_check_ss_c(ret, "\0", "\0");
@ -1394,6 +1408,28 @@ static void read_post_opts(void)
}
}
/*
* SIGINT signal handler used while waiting for postmaster to start up.
* Forwards the SIGINT to the postmaster process, asking it to shut down,
* before terminating pg_ctl itself. This way, if the user hits CTRL-C while
* waiting for the server to start up, the server launch is aborted.
*/
static void trap_sigint_during_startup(int sig)
{
if (postmasterPID != -1) {
if (kill(postmasterPID, SIGINT) != 0)
pg_log(PG_WARNING, _("%s: could not send stop signal (PID: %ld): %s\n"),
progname, postmasterPID, strerror(errno));
}
/*
* Clear the signal handler, and send the signal again, to terminate the
* process as normal.
*/
pqsignal(SIGINT, SIG_DFL);
raise(SIGINT);
}
static char* find_other_exec_or_die(const char* argv0, const char* target, const char* versionstr)
{
int ret;
@ -1682,6 +1718,17 @@ static void do_start(void)
pm_pid = start_postmaster();
if (do_wait) {
/*
* If the user interrupts the startup (e.g. with CTRL-C), we'd like to
* abort the server launch. Install a signal handler that will
* forward SIGINT to the postmaster process, while we wait.
*
* (We don't bother to reset the signal handler after the launch, as
* we're about to exit, anyway.)
*/
postmasterPID = pm_pid;
pqsignal(SIGINT, trap_sigint_during_startup);
pg_log(PG_PROGRESS, _("waiting for server to start...\n"));
switch (test_postmaster_connection(pm_pid, false, beforeStat)) {
case PQPING_OK: