MEDIUM: resolvers: add a ref on server to the used A/AAAA answer item
This patch adds a head list into answer items on servers which use
this record to set their IPs. It makes lookup on duplicated ip faster and
allow to check immediatly if an item is still valid renewing the IP.
This results in better performances on A/AAAA resolutions.
This is an optimization but it could avoid to trigger the haproxy's
internal wathdog in some circumstances. And for this reason
it should be backported as far we can (2.0 ?)
(cherry picked from commit bd78c912fd73b8506a39c53b6f0b00330f998aca)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit f9ca5d8bc12441c3c21a66b92ea401803a102f2b)
[cf: Changes applied in src/dns.c instead of src/resolvers.c]
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
diff --git a/src/server.c b/src/server.c
index 9a450a7..b0a5874 100644
--- a/src/server.c
+++ b/src/server.c
@@ -1741,6 +1741,7 @@
for (i = 0; i < MAX_THREADS; i++)
MT_LIST_INIT(&srv->actconns[i]);
srv->pendconns = EB_ROOT;
+ LIST_INIT(&srv->ip_rec_item);
srv->next_state = SRV_ST_RUNNING; /* early server setup */
srv->last_change = now.tv_sec;
@@ -4042,6 +4043,7 @@
if (!snr_update_srv_status(s, 1)) {
memset(&s->addr, 0, sizeof(s->addr));
HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
+ LIST_DEL_INIT(&s->ip_rec_item);
return 0;
}
HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);