MEDIUM: server: Inherit CLI weight changes and agent-check weight responses
When agent-check or CLI command executes relative weight change this patch
propagates it to tracking server allowing grouping many backends running on
same server underneath. Additionaly in case with many src IPs many backends
can have shared state checker, so there won't be unnecessary health checks.
[wt: Note: this will induce some behaviour change on some setups]
diff --git a/src/server.c b/src/server.c
index b5d8890..721de33 100644
--- a/src/server.c
+++ b/src/server.c
@@ -47,6 +47,9 @@
static void srv_update_state(struct server *srv, int version, char **params);
static int srv_apply_lastaddr(struct server *srv, int *err_code);
+const char *server_propagate_weight_change_request(struct server *sv,
+ const char *weight_str);
+
/* List head of all known server keywords */
static struct srv_kw_list srv_keywords = {
.list = LIST_HEAD_INIT(srv_keywords.list)
@@ -1445,6 +1448,8 @@
struct proxy *px;
long int w;
char *end;
+ const char *msg;
+ int relative = 0;
px = sv->proxy;
@@ -1466,6 +1471,8 @@
w = sv->iweight * w / 100;
if (w > 256)
w = 256;
+
+ relative = 1;
}
else if (w < 0 || w > 256)
return "Absolute weight can only be between 0 and 256 inclusive.\n";
@@ -1478,6 +1485,28 @@
sv->uweight = w;
server_recalc_eweight(sv);
+ if (relative) {
+ msg = server_propagate_weight_change_request(sv, weight_str);
+ if (msg != NULL) {
+ return msg;
+ }
+ }
+
+ return NULL;
+}
+
+const char *server_propagate_weight_change_request(struct server *sv,
+ const char *weight_str)
+{
+ struct server *tracker;
+ const char *msg;
+
+ for (tracker = sv->trackers; tracker; tracker = tracker->tracknext) {
+ msg = server_parse_weight_change_request(tracker, weight_str);
+ if (msg)
+ return msg;
+ }
+
return NULL;
}