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haproxy
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[MEDIUM] perform a soft stop when pause fails to be nice with non-Linux systems. 

At least OpenBSD and Solaris do not support shutdown() on listening socket.
So instead of blocking the hot reconfiguration, at least we can perform a
soft stop if the shutdown fails, so that the new daemon can bind to the
ports without trouble.
This commit is contained in:
Willy TARREAU 2006-05-14 09:55:23 +02:00
parent 1a71cc14c9
commit 007aa4606e
1 changed files with 20 additions and 3 deletions
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19
haproxy.c
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@ -6753,11 +6753,12 @@ static void soft_stop(void) {
static void pause_proxy(struct proxy *p) {
struct listener *l;
for (l = p->listen; l != NULL; l = l->next) {
shutdown(l->fd, SHUT_RD);
if (shutdown(l->fd, SHUT_RD) == 0) {
FD_CLR(l->fd, StaticReadEvent);
p->state = PR_STPAUSED;
}
}
}
/*
* This function temporarily disables listening so that another new instance
@ -6766,8 +6767,10 @@ static void pause_proxy(struct proxy *p) {
* the proxy, or a SIGTTIN can be sent to listen again.
*/
static void pause_proxies(void) {
int err;
struct proxy *p;
err = 0;
p = proxy;
tv_now(&now); /* else, the old time before select will be used */
while (p) {
@ -6775,9 +6778,19 @@ static void pause_proxies(void) {
Warning("Pausing proxy %s.\n", p->id);
send_log(p, LOG_WARNING, "Pausing proxy %s.\n", p->id);
pause_proxy(p);
if (p->state != PR_STPAUSED) {
err |= 1;
Warning("Proxy %s failed to enter pause mode.\n", p->id);
send_log(p, LOG_WARNING, "Proxy %s failed to enter pause mode.\n", p->id);
}
}
p = p->next;
}
if (err) {
Warning("Some proxies refused to pause, performing soft stop now.\n");
send_log(p, LOG_WARNING, "Some proxies refused to pause, performing soft stop now.\n");
soft_stop();
}
}
@ -9259,6 +9272,10 @@ int main(int argc, char **argv) {
if (nb_oldpids == 0)
break;
/* FIXME-20060514: Solaris and OpenBSD do not support shutdown() on
* listening sockets. So on those platforms, it would be wiser to
* simply send SIGUSR1, which will not be undoable.
*/
tell_old_pids(SIGTTOU);
/* give some time to old processes to stop listening */
w.tv_sec = 0;