Upstream: honor the "down" flag for a single server.
If an upstream block was defined with the only server marked as
"down", e.g.
upstream u {
server 127.0.0.1:8080 down;
}
an attempt was made to contact the server despite the "down" flag.
It is believed that immediate 502 response is better in such a
case, and it's also consistent with what is currently done in case
of multiple servers all marked as "down".
diff --git a/src/http/ngx_http_upstream_round_robin.c b/src/http/ngx_http_upstream_round_robin.c
index c4998fc..4b78cff 100644
--- a/src/http/ngx_http_upstream_round_robin.c
+++ b/src/http/ngx_http_upstream_round_robin.c
@@ -430,6 +430,10 @@
if (rrp->peers->single) {
peer = &rrp->peers->peer[0];
+ if (peer->down) {
+ goto failed;
+ }
+
} else {
/* there are several peers */
