/* _signal_handler - Process daemon-wide signals */
static void *_signal_handler(void *no_data)
{
int rc, sig;
int sig_array[] = {SIGINT, SIGTERM, SIGHUP, SIGABRT, SIGUSR2, 0};
sigset_t set;
(void) pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
(void) pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
/* Make sure no required signals are ignored (possibly inherited) */
_default_sigaction(SIGINT);
_default_sigaction(SIGTERM);
_default_sigaction(SIGHUP);
_default_sigaction(SIGABRT);
_default_sigaction(SIGUSR2);
while (1) {
xsignal_sigset_create(sig_array, &set);
rc = sigwait(&set, &sig);
if (rc == EINTR)
continue;
switch (sig) {
case SIGHUP: /* kill -1 */
info("Reconfigure signal (SIGHUP) received");
reconfig();
break;
case SIGINT: /* kill -2 or <CTRL-C> */
case SIGTERM: /* kill -15 */
info("Terminate signal (SIGINT or SIGTERM) received");
shutdown_threads();
return NULL; /* Normal termination */
case SIGABRT: /* abort */
info("SIGABRT received");
abort(); /* Should terminate here */
shutdown_threads();
return NULL;
case SIGUSR2:
info("Logrotate signal (SIGUSR2) received");
_update_logging(false);
break;
default:
error("Invalid signal (%d) received", sig);
}
}
}
/* run_dbd_backup - this is the backup controller, it should run in standby
* mode, assuming control when the primary controller stops responding */
extern void run_dbd_backup(void)
{
slurm_persist_conn_t slurmdbd_conn;
primary_resumed = false;
memset(&slurmdbd_conn, 0, sizeof(slurm_persist_conn_t));
slurmdbd_conn.rem_host = slurmdbd_conf->dbd_addr;
slurmdbd_conn.rem_port = slurmdbd_conf->dbd_port;
slurmdbd_conn.cluster_name = "backup_slurmdbd";
slurmdbd_conn.fd = -1;
slurmdbd_conn.shutdown = &shutdown_time;
slurm_persist_conn_open_without_init(&slurmdbd_conn);
/* repeatedly ping Primary */
while (!shutdown_time) {
int writeable = slurm_persist_conn_writeable(&slurmdbd_conn);
//info("%d %d", have_control, writeable);
if (have_control && writeable == 1) {
info("Primary has come back");
primary_resumed = true;
shutdown_threads();
have_control = false;
break;
} else if (!have_control && writeable <= 0) {
have_control = true;
info("Taking Control");
break;
}
sleep(1);
if (writeable <= 0)
slurm_persist_conn_reopen(&slurmdbd_conn, false);
}
slurm_persist_conn_close(&slurmdbd_conn);
return;
}
