Pick infracloud mysql connections value from hiera

It needs to be tuned depending on number of cpus
and memory of the server.

Change-Id: Id00d32c1bc225db16fa45d990ff8227db4f68ff0
Depends-On: Id5a0e5af031175cc0a9d8b5a3bb97ae4adfbdf1e

hiera/group/infracloud.yaml

@@ -2864,3 +2864,4 @@ ipv4_nameserver: '8.8.8.8'
 ipv4_subnet_mask: '255.255.224.0'
 dhcp_pool_start: '10.10.16.144'
 dhcp_pool_end: '10.10.16.190'
+mysql_max_connections: '1024'

manifests/site.pp

@@ -1355,7 +1355,8 @@ node 'controller00.vanilla.ic.openstack.org' {
                                           'start=15.184.65.2,end=15.184.65.254',
                                           'start=15.184.66.2,end=15.184.66.254',
                                           'start=15.184.67.2,end=15.184.67.254'
-                                        ]
+                                        ],
+    mysql_max_connections            => hiera('mysql_max_connections'),
   }
 }
 

modules/openstack_project/manifests/infracloud/controller.pp

@@ -23,6 +23,7 @@ class openstack_project::infracloud::controller (
   $neutron_subnet_cidr,
   $neutron_subnet_gateway,
   $neutron_subnet_allocation_pools,
+  $mysql_max_connections = 1024,
 ) {
   include ::openstack_project::infracloud::base
 
@@ -47,6 +48,7 @@ class openstack_project::infracloud::controller (
     neutron_subnet_cidr              => $neutron_subnet_cidr,
     neutron_subnet_gateway           => $neutron_subnet_gateway,
     neutron_subnet_allocation_pools  => $neutron_subnet_allocation_pools,
+    mysql_max_connections            => $mysql_max_connections,
   }
 
   realize (