MEDIUM: config: make the frontends automatically bind to the listeners' processes
When a frontend does not have any bind-process directive, make it
automatically bind to the union of all of its listeners' processes
instead of binding to all processes. That will make it possible to
have the expected behaviour without having to explicitly specify a
bind-process directive.
Note that if the listeners are not bound to a specific process, the
default is still to bind to all processes.
This change could be backported to 1.5 as it simplifies process
management, and was planned to be done during the 1.5 development phase.
(cherry picked from commit b369a045d545b41ef2b250bf747caf83c97e0ca8)
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 3c75c92..1e32057 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -1905,6 +1905,10 @@
Each "bind" line may further be limited to a subset of the proxy's processes,
please consult the "process" bind keyword in section 5.1.
+ When a frontend has no explicit "bind-process" line, it tries to bind to all
+ the processes referenced by its "bind" lines. That means that frontends can
+ easily adapt to their listeners' processes.
+
If some backends are referenced by frontends bound to other processes, the
backend automatically inherits the frontend's processes.
diff --git a/src/cfgparse.c b/src/cfgparse.c
index b9853ef..d53f69e 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -7175,11 +7175,47 @@
}
/* At this point, target names have already been resolved */
+
+ /* Make each frontend inherit bind-process from its listeners when not specified. */
+ for (curproxy = proxy; curproxy; curproxy = curproxy->next) {
+ if (curproxy->bind_proc)
+ continue;
+
+ list_for_each_entry(bind_conf, &curproxy->conf.bind, by_fe) {
+ unsigned long mask;
+
+ mask = bind_conf->bind_proc ? bind_conf->bind_proc : ~0UL;
+ curproxy->bind_proc |= mask;
+ }
+
+ if (!curproxy->bind_proc)
+ curproxy->bind_proc = ~0UL;
+ }
+
+ if (global.stats_fe) {
+ list_for_each_entry(bind_conf, &global.stats_fe->conf.bind, by_fe) {
+ unsigned long mask;
+
+ mask = bind_conf->bind_proc ? bind_conf->bind_proc : ~0UL;
+ global.stats_fe->bind_proc |= mask;
+ }
+ if (!global.stats_fe->bind_proc)
+ global.stats_fe->bind_proc = ~0UL;
+ }
+
+ /* propagate bindings from frontends to backends */
for (curproxy = proxy; curproxy; curproxy = curproxy->next) {
if (curproxy->cap & PR_CAP_FE)
propagate_processes(curproxy, NULL);
}
+ /* Bind each unbound backend to all processes when not specified. */
+ for (curproxy = proxy; curproxy; curproxy = curproxy->next) {
+ if (curproxy->bind_proc)
+ continue;
+ curproxy->bind_proc = ~0UL;
+ }
+
/* automatically compute fullconn if not set. We must not do it in the
* loop above because cross-references are not yet fully resolved.
*/