Move LDAP pool creation from app init to a boot step.

deps/rabbitmq_auth_backend_ldap/src/rabbit_auth_backend_ldap_app.erl

@@ -21,7 +21,16 @@
 
 %% Dummy supervisor to get this application behaviour working
 -behaviour(supervisor).
--export([init/1]).
+-export([create_ldap_pool/0, init/1]).
+
+-rabbit_boot_step({ldap_pool,
+                   [{description, "LDAP pool"},
+                    {mfa, {?MODULE, create_ldap_pool, []}}, 
+                    {requires, kernel_ready}]}).
+
+create_ldap_pool() ->
+    {ok, PoolSize} = application:get_env(rabbitmq_auth_backend_ldap, pool_size),
+    rabbit_sup:start_supervisor_child(ldap_pool_sup, worker_pool_sup, [PoolSize, ldap_pool]).
 
 start(_Type, _StartArgs) ->
     {ok, Backends} = application:get_env(rabbit, auth_backends),
@@ -50,13 +59,5 @@ configured(M,  [_    |T]) -> configured(M, T).
 
 %%----------------------------------------------------------------------------
 
-init([]) ->
-    {ok, PoolSize} = application:get_env(rabbitmq_auth_backend_ldap, pool_size),
-    PoolSupSpec = {ldap_pool_sup,
-                   {worker_pool_sup, start_link, [PoolSize, ldap_pool]},
-                   permanent,
-                   infinity,
-                   supervisor,
-                   [worker_pool_sup]},
-    {ok, {{one_for_all, 3, 10},
-          [PoolSupSpec]}}.
+init([]) -> {ok, {{one_for_one, 3, 10}, []}}.
+